Article
Energy & Fuels
Luxmi Rani, Jeong In Han
Summary: This study investigates high performance energy storage electrode materials using a simple and feasible hydrothermal technique. SnS2 microspheres were synthesized and characterized, and their supercapacitive performance was evaluated. The addition of a moderate amount of MWCNTs enhanced the specific capacity of SnS2 microspheres. Aqueous asymmetric supercapacitors (ASC) were designed with MWCNT/SnS2 as the positive electrode and activated carbon as the negative electrode, delivering high energy density and power density. Additionally, multiple parallel-connected LEDs were successfully lit using series-connected MWCNT/SnS2//AC devices.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Physical
Luxmi Rani, Jeong In Han
Summary: In this study, microspheres of CoS were synthesized by the commonly used hydrothermal method and characterized by various techniques. The prepared CoS material showed a high specific capacity of 112.62 mAh g-1 as electrode material for supercapacitors at 1 A g-1. By adding a small amount of multi-walled carbon nanotubes (MWCNTs), the specific capacity was further improved to 158 mAh g-1 at the same current density. Aqueous asymmetric supercapacitors (ASC) were designed using MWCNT/CoS as the positive electrode and activated carbon (AC) as the negative electrode, resulting in a high energy density of 31.6 W h kg-1 at a power density of 750 W h kg-1.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Iurii V. Panasenko, Mikhail O. Bulavskiy, Anna A. Iurchenkova, Yenanny Aguilar-Martinez, Fedor S. Fedorov, Ekaterina O. Fedorovskaya, Bjorn Mikladal, Tanja Kallio, Albert G. Nasibulin
Summary: Advancements in supercapacitor performance are driven by both material design and device architecture adjustments. This study focuses on designing unique dead-weight free supercapacitors based on PANI electrochemically deposited on free-standing SWCNT films. The research shows that thin free-standing films of SWCNTs with deposited PANI are less prone to self-discharge, enabling higher gravimetric capacitance values.
JOURNAL OF POWER SOURCES
(2022)
Review
Energy & Fuels
S. M. Sultan Mahmud Rahat, Khan Md. Zubaed Hasan, Md. Mahmudul Hassan Mondol, Abul K. Mallik
Summary: Energy storage is a challenging issue for the transition to renewable energy, and supercapacitors with carbon nanotube and metal-based composites show great potential due to their high-power density and stable retention rate. However, nanocomposites with different materials exhibit pseudocapacitance behavior, which means high power density but low energy density. Further research is needed to address this challenge and explore the prospects of energy storage.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Materials Science, Ceramics
Jai Bhagwan, Jeong In Han
Summary: In this study, a hybrid electrode material of CoMn2O4 hexagonal nanoplates and multi-walled carbon nanotubes (MWCNTs) was successfully synthesized and showed high specific capacity and energy density in supercapacitors. TEM analysis revealed that CoMn2O4 nanoplates were uniformly anchored on MWCNTs, which maintained good electronic channels throughout the electrode material. The synergistic interaction between MWCNTs and CoMn2O4 nanoplates contributed to the improved specific capacity and energy density of the hybrid electrode.
CERAMICS INTERNATIONAL
(2023)
Article
Energy & Fuels
Jai Bhagwan, Jeong In Han
Summary: MgMn2O4 nanoplates-like structures were synthesized using the co-precipitation method. The synthesized material exhibited excellent energy storage performance. The specific capacitance of the MgMn2O4/MWCNT composite reached 1208 F g-1, further enhancing the energy storage performance. The aqueous asymmetric supercapacitor constructed with this composite as the positive electrode and activated carbon as the negative electrode showed high energy density and power density. Two parallel connected red color light-emitting diodes (LEDs), a kitchen timer, and a toy motor fan were powered by two series connected asymmetric supercapacitors.
JOURNAL OF ENERGY STORAGE
(2023)
Review
Chemistry, Multidisciplinary
Pranjala Tiwari, Dawid Janas
Summary: This review article examines the fundamental phenomenon of utilizing single-walled carbon nanotubes (SWCNTs) as pseudocapacitive electrodes and the advancements in incorporating various conducting materials in their matrix. It provides a detailed overview of the latest technological advances and achievements of SWCNT hybrids as primary electrodes in charge storage devices, including binary composites and ternary hybrids, while also highlighting the pressing challenges in this field.
MATERIALS CHEMISTRY FRONTIERS
(2022)
Article
Energy & Fuels
Hyun-Woo Kim, Jeong-Un Jin, Dongju Lee, Seo Gyun Kim, Bon-Cheol Ku, Seongwoo Ryu, Nam-Ho You
Summary: In this study, an effective method for controlling the viscosity of liquid crystal SWCNT phases was reported. By functionalizing single-walled carbon nanotubes, the viscosity and phase transformation of the liquid crystal phases could be precisely controlled. The resulting SWCNT fibers exhibited higher mechanical properties and electrical conductivity, as well as flexibility and durability for wearable and flexible electronic electrode devices. Moreover, the SWCNT fibers demonstrated excellent performance as Zn-ion supercapacitors with high capacitance retention after bending tests.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Electrochemistry
Mansoor Farbod, Elham Elahi Asl, Seyyedeh Saadat Shojaeenezhad
Summary: The size of polypyrrole (PPy) particles can be adjusted by adding carbon nanotubes (CNTs) with different weight percentages. Increasing the weight percentage of CNTs reduces the size of PPy particles. However, increasing the reflux time of CNTs leads to an increase in the size of PPy particles. Electrochemical measurements show that the specific capacity of supercapacitors decreases with increasing reflux time of CNTs in the nanocomposite.
JOURNAL OF APPLIED ELECTROCHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Shobha, Bhaskaran, Mahak Singh, C. M. S. Negi, Saral Kumar Gupta
Summary: The interaction between metal oxide and carbon nanotubes plays a crucial role in enhancing the energy storage capacity in energy storage devices. In this study, the NiCo2O4/MWCNT composite electrode exhibits a significantly higher specific capacitance and capacity compared to pristine NiCo2O4, with improved rate capability and cycling stability. These enhanced electrochemical properties are attributed to improved electrical conductivity, low charge transfer resistance, and the beneficial synergistic effect of the composite material.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2021)
Article
Energy & Fuels
Elif Aksun Baykara, Bulent Zeybek
Summary: In this study, a novel hybrid material consisting of cobalt hexacyanoferrate, multi-walled carbon nanotube with carboxyl functionalized, and polypyrrole was prepared as a supercapacitor element on a pencil graphite electrode. The hybrid material exhibited superior supercapacitive performance and long charge-discharge cycle life in an acidic medium. The specific capacitance of the hybrid composite reached 495.0 F g-1 under optimum coating conditions. Moreover, a symmetrical supercapacitor using the optimized electrodes successfully powered red, green, and blue LEDs.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Physics, Applied
Keiko Kojima, Hirokuni Jintoku, Yuki Kuwahara, Miho Aizawa, Takahiro Yamamoto, Shun Muroga, Kazufumi Kobashi, Toshiya Okazaki
Summary: We investigated the liquid crystal phase behaviors of sodium cholate-stabilized single-walled carbon nanotube (SWCNT) aqueous dispersions with different SWCNT aspect ratios. The isotropic-to-nematic phase transition occurs at a lower concentration for the SWCNT dispersion with a larger aspect ratio, as expected by the Onsager theory. A well-aligned film was successfully fabricated from the dispersion with a higher SWCNT aspect ratio using simple blade coating. We also prepared SWCNT dispersions with different surfactants, sodium deoxycholate, and sodium taurodeoxycholate, to change the surface condition of SWCNTs, which may affect the LC transition concentrations.
APPLIED PHYSICS EXPRESS
(2022)
Article
Chemistry, Physical
Worawut Muangrat, Michiko Obata, Myo Than Htay, Masatsugu Fujishige, Paweena Dulyaseree, Winadda Wongwiriyapan, Yoshio Hashimoto
Summary: The hybrid nitrogen-doped graphene nanosheet-grafted double-walled carbon nanotube (NG-DWCNT) material was successfully synthesized by chemical vapor deposition (CVD) and thermal CVD techniques, exhibiting a sharp-edged petal-like structure and a higher specific capacitance value. This material has potential applications in electrochemical conversion and energy storage devices.
Article
Construction & Building Technology
Guifeng Liu, Deyuan Kan, Shuang Cindy Cao, Zhengfa Chen, Qifeng Lyu
Summary: This research aims to investigate the effect of multi-walled carbon nanotubes (MWCNTs) on the mechanical and microstructure properties of reactive powder concrete (RPC) subjected to high concentration sulfate dry-wet cycles. The results demonstrate that the addition of MWCNTs improves the sulfate resistance of RPC, and the type of sulfate affects the properties of corroded material.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Electrochemistry
Sean Ryan, Michelle P. Browne, Ainur Zhussupbekova, Dahnan Spurling, Lorcan McKeown, Danielle Douglas-Henry, Lucy Prendeville, Sebastien Vaesen, Wolfgang Schmitt, Igor Shvets, Valeria Nicolosi
Summary: Due to the energy crisis faced by this generation, the development of green energy and its storage, particularly the use of supercapacitors, has become a focus of attention. Single walled carbon nanotubes (SWCNT) were identified as a promising material for supercapacitor electrodes, however, their electrical properties are damaged when exposed to anodic potentials in sulphate-based electrolytes. In this study, we propose a strategy to expand the voltage window of SWCNTs by adding tin (II) oxide (SnO), which protects the SWCNTs from oxidation and improves long-term cycling stability. We also demonstrate the advantage of the expanded voltage window in an asymmetric device using MXene, achieving a capacity retention of 90% after 7,500 cycles at 10 A g(-1).
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Physical
Zubair Ahmad, Sachin Kumar, Cuc Kim Trinh, Jae-Jin Shim, Jae-Suk Lee
Summary: A molecular-level-controlled polypyrrole/graphene oxide nanocomposite was synthesized using a predoped two-monomer-connected precursor (TMCP) and graphene oxide (GO). The resulting nanocomposite exhibited excellent electrochemical performance and cycling stability. The systematic investigation showed that various parameters, such as crystallinity, crystalline domain size, doping level, and electrical conductivity, could be well controlled using a specific concentration of the dopant and connector.
APPLIED SURFACE SCIENCE
(2023)
Article
Environmental Sciences
Sawaira, Mabkhoot Alsaiari, Mushtaq Ahmad, Mamoona Munir, Muhammad Zafar, Shazia Sultana, Sumreen Dawood, Abdulaziz Ibrahim Almohana, M. H. Al-Marzouki Hassan, Abdulrahman Faraj Alharbi, Zubair Ahmad
Summary: A novel green bismuth oxide nanocatalyst derived from plant extract was synthesized and applied for sustainable biofuel synthesis from Cannabis sativa seed oil. The synthesized biodiesel showed comparable fuel properties with internationally set parameters.
Article
Chemistry, Physical
Nazir Ahmad Mala, Mehraj Ud Din Rather, Raja Nisar Ali, Shahid Hussain, Sobhy M. Ibrahim, Nabi Ullah, Shahid Husain, Zubair Ahmad
Summary: In this study, Mo-Cu dual-doped NiO nanorods were prepared using the hydrothermal method. Characterization techniques including X-ray diffraction, scanning electron microscopy, and high-resolution transmission electron microscopy were employed to study the nanorods. Electrochemical analysis revealed their pseudocapacitive nature and high specific capacitance under certain conditions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Review
Chemistry, Physical
Shahid Alam, Fizza Fiaz, Muhammad Ishaq Khan, Muhammad Zahir Iqbal, Zubair Ahmad, Hosameldin Helmy Hegazy
Summary: This article introduces the great application prospects of 2D transitional metal carbides/nitrides (MXenes) in Supercapacitors (SCs). MXene, with its outstanding physiochemical merits, superior volumetric capacitance, metallic-like conductivity, multilayered structures, adjustable surface terminations, redox reaction active surfaces, and structural advantages, facilitates energy storage. The article discusses the synthesis of MXene and the different factors that play a crucial role in energy storing capability, as well as methods to enhance capacitance, energy density, and voltage window. It also focuses on the strategy of composite formation and electrolyte selection to enhance the performance of MXene-based composites. The article provides a comprehensive view of the current development and opportunities, serving as a roadmap for scientists to tailor electrochemical features of MXene-based composites for the latest generation of energy storage devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Electrical & Electronic
Nazir Ahmad Mala, Mohd Arif Dar, Mehraj Ud Din Rather, Bilal Ahmad Reshi, S. Sivakumar, Khalid Mujasam Batoo, Zubair Ahmad
Summary: In this research, pristine nickel oxide (NiO) and Mn-doped NiO nanoparticles (NPs) were synthesized using the chemical precipitation method. Characterization techniques such as X-ray diffraction (XRD), Fourier transform infrared (FT-IR), UV-Visible diffuse reflectance spectroscopy, scanning electron microscopy/energy dispersive X-ray spectroscopy (SEM/EDX), transmission electron microscopy/selected area electron diffraction (TEM/SAED), vibrating sample magnetometer, and cyclic voltammetry were used to analyze the properties of the NPs. The results showed that the NPs exhibited face-centered cubic structures with decreasing crystallite sizes. The presence of Mn ions led to a transition from weak ferromagnetism to superparamagnetism. Pristine NiO samples exhibited the highest capacitance of 555 F/g at a scan rate of 10 mV/s. These NiO and Mn-doped NiO NPs have potential applications in data storage and supercapacitors.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Review
Polymer Science
Akhtar Hussain Malik, Faiza Habib, Mohsin Jahan Qazi, Mohd Azhardin Ganayee, Zubair Ahmad, Mudasir A. Yatoo
Summary: This article provides a brief review of conjugated polymers and discusses the various typical polymerization reactions used to synthesize different conjugated polyelectrolytes. It also emphasizes the mechanisms involved in the detection or sensing of various analytes, such as photo-induced electron transfer, resonance energy transfer, and intra-molecular charge transfer. Due to their excellent properties, conjugated polymers have been widely explored for applications in chemical and biological sensors, drug delivery and screening, cancer therapeutics and imaging. Therefore, this review article is believed to be timely for the community.
JOURNAL OF POLYMER RESEARCH
(2023)
Article
Chemistry, Inorganic & Nuclear
Mohd Arif Dar, Sheikh Rizwan Ahmed, Mohd Aslam Rather, S. Kalpana, Aafaq A. Rather, S. Rafi Ahamed, Zubair Ahmad
Summary: In this article, orthorhombic SnSe nanoparticles with sheet and flower-like shapes are prepared through a hydrothermal method using Oleylamine and Ethylene glycol solvents. The cyclic voltammograms and Galvanostatic charge/discharge studies of AN-(OA) and AN-(EG) electrodes in KOH electrolyte are investigated. The specific capacitance values of AN-(EG) and AN-(OA) electrodes are calculated through CV curves and GCD curves, showing the morphology plays a critical role in the capacitive performance of NPs.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Mohd Arif Dar, S. Dinagaran, D. Govindarajan, S. Rafi Ahamed, Faiza Habib, C. Siva, Annasaheb Moholkar, Zubair Ahmad, Mudasir A. Yatoo
Summary: In this article, Mn-doped Snx-0MnxS nanoparticles were synthesized and characterized. The results showed that Mn doping improved the electrochemical properties of pure SnS NPs, making them a potential alternative for energy storage devices. The study also indicated the potential applications of these nanoparticles in data storage devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Muhammad Zahir Iqbal, Umer Aziz, Rida Zahid, Saikh Mohammad Wabaidur, Zubair Ahmad, Sikandar Aftab
Summary: Metal organic frameworks (MOFs) have demonstrated excellent electrochemical performance as active materials for energy storage applications, with high specific capacity, long-term cyclic stability, excellent energy densities, and rapid charging discharging rates. In this study, lithium and manganese based MOFs were synthesized using a 1, 3, 5 benzenetricarbxylic acid organic linker, and a hybrid device (battery-supercapacitor) was fabricated using manganese-MOF as the working electrode and activated carbon as the counter electrode. The device exhibited a specific capacity of 253 C g^(-1) at 1.0 A g^(-1), cyclic durability of 93% after 3000 GCD cycles, power density of 2560 W kg^(-1), and energy density of 59.92 Wh kg^(-1). Dunn's model was used to analyze the capacitive and diffusive currents, providing insights into the charge transfer mechanism. These impressive electrochemical outcomes highlight the potential of MOFs-based electrode materials for supercapattery applications.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Energy & Fuels
Mohd Arif Dar, S. Dinagaran, Khalid Mujasam Batoo, S. Rafi Ahamed, Sajjad Hussain, Zubair Ahmad, Jae-Jin Shim
Summary: In this study, pure and Ni-doped SnS nanoparticles were successfully synthesized using a simple and low-cost solvothermal method. The Ni-doped sample exhibited a flower-like morphology as shown in the SEM and TEM images. The supercapacitor performance of the electrodes was investigated using CV, GCD, and EIS measurements, revealing that the Ni-doped electrode had a higher specific capacitance, specific energy, and specific power compared to the pure SnS electrode. Moreover, the optimized Ni-doped electrode showed excellent cycling stability with a retention of 97% and a coulombic efficiency of 98% after 2000 cycles.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Energy & Fuels
Abdul Mateen, Zubair Ahmad, Salamat Ali, Najam Ul Hassan, Fahim Ahmed, Razan A. Alshgari, Mohammed Mushab, Sayed M. Eldin, Mohd Zahid Ansari, Muhammad Sufyan Javed, Kui-Qing Peng
Summary: MXenes show promise as a new 2D material for energy storage and conversion applications due to their excellent conductivity, accordion-like layered structure, surface chemistry, and organized nanochannels. In this work, a V2CTx@Si nanocomposite electrode material was developed for supercapacitors, utilizing silicon nanospheres as spacers to increase ion transport channels and improve performance. The V2CTx@Si//Zn zinc-ion supercapacitor exhibited a high capacitance, wide potential range, and long cyclic life.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Multidisciplinary
Muhammad Zahir Iqbal, Misbah Shaheen, Ahmad A. Ifseisi, Sikandar Aftab, Zubair Ahmad, Sajid Hussain Siyal, Muhammad Javaid Iqbal
Summary: This study enhances the energy storage performance of tungsten disulfide (WS2) by introducing a conductive interfacial layer of Ag between the substrate and active material. The Ag-WS2//AC devices achieved a specific capacity (Q(s)) of 224 C g(-1), with maximum specific energy (E-s) and specific power (P-s) of 50 W h kg(-1) and 4003 W kg(-1), respectively. The device was stable, retaining 89% capacity and 97% coulombic efficiency after 1000 cycles. Capacitive and diffusive currents were analyzed to observe the charging phenomenon at each scan rate using Dunn's model.
Review
Materials Science, Multidisciplinary
Mudasir A. Yatoo, Faiza Habib, Akhtar Hussain Malik, Mohsin Jahan Qazi, Sharique Ahmad, Mohd Azhardin Ganayee, Zubair Ahmad
Summary: Solid-oxide fuel cells, composed of a solid electrolyte, cathode, and anode, are efficient devices for converting chemical to electrical energy. Researchers have extensively worked on material development for these components, and this review article discusses the requirements and prominent materials families explored by the scientific community. Given the increasing need for greener energy alternatives and the substantial literature generated on materials development for solid-oxide fuel cells, a brief review article dedicated to this topic would be valuable for the scientific community, especially for new researchers entering the field.
MRS COMMUNICATIONS
(2023)
Article
Materials Science, Ceramics
Wajeeha Wazir, Zubair Ahmad, Sonia Zulfiqar, Eric W. Cochran, Shamroza Mubarik, Tehmina Kousar, H. H. Somaily, Jae-Jin Shim, Hessa A. Alsalmah, Muhammad Aadil
Summary: This study involves the synthesis of silver-doped nickel oxide nanocatalyst using a wet-chemical method and surfactant support. The Ag-doped nickel oxide exhibited enhanced photocatalytic activity for the degradation of crystal violet dye under W-light exposure. The presence of silver dopant reduced the band gap energy and mitigated electron-hole recombination, improving the absorption of light and efficiency of photocatalysis. The study proposes a novel approach to enhance the photocatalytic capabilities of basic ceramic materials, making it promising for environmental remediation.
CERAMICS INTERNATIONAL
(2023)
Article
Electrochemistry
Abdul Qayoom Mugheri, Shaista Khan, Ali Asghar Sangah, Aijaz Ahmed Bhutto, Muhammad Younis Laghari, Nadeem Ahmed Mugheri, Asif Ali Jamali, Arsalan Ahmed Mugheri, Nagji Sodho, Abdul Waheed Mastoi, Aftab Kandhro
Summary: Green hydrogen has the potential to transition to a pollution-free energy infrastructure. This study proposes a solution to produce hydrogen during the photoelectrochemical process, offering greater stability and control over chemical reactions. Techno-economic assessments show the efficiency and economic feasibility of co-producing value-added chemicals to enhance green hydrogen production.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Danpeng Cheng, Wuxin Sha, Qigao Han, Shun Tang, Jun Zhong, Jinqiao Du, Jie Tian, Yuan-Cheng Cao
Summary: LiNixCoyMn1-x-yO2 (NCM) is a critical cathode material for lithium-ion batteries in electric vehicles. The aging of cathode/electrolyte interfaces leads to capacity degradation and long-term cycle instability. A novel neural network model called ACGNet is developed to predict electrochemical stability windows of crystals, allowing for high-throughput screening of coating materials. LiPO3 is identified as a promising coating material with high oxidation voltage and low cost, which significantly improves the cycle stability of NCM batteries. This study demonstrates the accuracy and potential of machine learning in battery materials.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
P. Mohana, R. Yuvakkumar, G. Ravi, S. Arunmetha
Summary: This study successfully fabricates a non-noble CuO/NiO/rGO nanocomposite and investigates its electrocatalytic performance for oxygen evolution reaction in alkaline environment. The experimental results demonstrate that the electrocatalyst exhibits high activity and good stability, offering a new synthetic approach for sustainable energy production.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Qiong Qu, Jing Guo, Hongyu Wang, Kai Zhang, Jingde Li
Summary: In this study, a bifunctional electrode host design consisting of carbon nanofibers implanted ordered porous Co-decorated Al2O3 supported on carbon nanotube film (CNTF) was proposed to address the shuttling effect of lithium polysulfides (LiPSs) and dendrite formation of metal lithium anode in lithium-sulfur (Li-S) batteries. The electrode exhibited excellent conductivity, efficient confinement of LiPSs, and catalytic conversion performance, resulting in high initial capacity and good capacity retention during cycling. As an anode, the electrode showed excellent Li+ diffusion performance and uniform lithium growth behavior, achieving a dendrite-free lithium electrode. The flexible pack cell assembled from these electrodes delivered a specific capacity of 972 mAh g(-1) with good capacity retention.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Hong Zhang, Jin-Peng Yu, Chen Chen, Cheng-Yong Shu, Guang-Yu Xu, Jie Ren, Kai Cui, Wen-Fang Cai, Yun-Hai Wang, Kun Guo
Summary: Spray coating of acetylene black nanoparticles onto stainless steel mesh can enhance its biofilm formation ability and current density, making it a promising electrode material for microbial electrochemical systems. The spray coating method is simple, cost-effective, and suitable for large-size stainless steel electrodes.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Binpeng Hou, Jingjin Chen, Li-Hong Zhang, Xiaowen Shi, Zizhong Zhu
Summary: The electrochemical performance of Li1.20Mn0.44Ni0.32Co0.04O2 and its oxygen-deficient phase Li1.20Mn0.44Ni0.32Co0.04O1.83 was studied through first-principles calculations. The results show that the oxygen-deficient phase has a higher theoretical capacity but lower voltage platform and higher chemical activity compared to the pristine phase.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Yating Du, Sayoko Shironita, Daisuke Asakura, Eiji Hosono, Yoshitsugu Sone, Yugo Miseki, Eiichi Kobayashi, Minoru Umeda
Summary: This study investigates the effect of high- and low-temperature environments on the charge-discharge performance of a Li-ion battery. The deterioration mechanisms of the battery at different temperatures are analyzed through various characterization techniques. The results indicate that the battery performance deteriorates more significantly at a low-temperature environment of 5 degrees C compared to higher temperatures. The understanding of the deterioration mechanisms can contribute to the development of safer battery usage methods.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Si-Si Shi, Zhi-Xiang Yuan, Fei Zhang, Ping Chen
Summary: In this study, a new nano-electrocatalyst was prepared, which exhibited superior electrocatalytic activity for the reduction of NO2- to ammonia in a neutral electrolyte, potentially due to the synergistic enhancement between Co3O4-x and Co.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Berna Dalkiran, Havva Bekirog
Summary: This study reports the use of deep eutectic solvents (DES) based on ethylene glycol and urea as low-cost and green electrolytes for enhancing electrochemical detection of natural antioxidants. The study successfully developed a disposable and effective electrochemical sensing platform for simultaneous determination of ascorbic acid (AA) and gallic acid (GA) using NaOH nanorods on a pencil graphite electrode. The proposed electrode showed improved analytical performance, with higher peak currents and shifted oxidation potentials in DES compared to BR buffer medium.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Sijun Ren, Jianguo Huang
Summary: In this study, a novel bio-inspired nanofibrous WO3/carbon composite was synthesized using a facile hydrothermal method. The three-dimensional network structure of the composite alleviated the volume expansion of WO3 nanorods and enhanced the charge-transport kinetics. The optimized composite exhibited superior lithium storage properties.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Zhilong Zheng, Yu Chen, Hongxia Yin, Hengbo Xiao, Xiangji Zhou, Zhiwen Li, Ximin Li, Jin Chen, Songliu Yuan, Junjie Guo, Haibin Yu, Zhen Zhang, Lihua Qian
Summary: This study found that interstitial Zn cations in CoMoO4 can modulate the dissolution kinetics of Mo cations and improve the OER performance. The interstitial Zn cations can prevent the dissolution of Co cations at high potential, enhancing the durability of the catalyst.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Xiaobo Lin, Shern R. Tee, Debra J. Searles, Peter T. Cummings
Summary: Molecular dynamics simulations using the constant potential method were used to investigate the charging dynamics and charge storage of supercapacitors. The simulations revealed that the water-in-salt electrolyte exhibited the highest charge storage and significantly higher capacitance on the negative electrode. The varying contributions of different electrode regions to supercapacitor performance were also demonstrated.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Wiktoria Lipinska, Vita Saska, Katarzyna Siuzdak, Jakub Karczewski, Karol Zaleski, Emerson Coy, Anne de Poulpiquet, Ievgen Mazurenko, Elisabeth Lojou
Summary: The spatial distribution of enzymes on electrodes is important for bioelectrocatalysis. In this study, controlled spatial distribution of gold nanoparticles on Ti nanodimples was achieved. The efficiency of enzymatic O2 reduction was found to be influenced by the size of the gold nanoparticles and their colocalization with TiO2. The highest stability of enzymatic current was observed with the largest gold nanoparticles.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Tariq M. Al-Hejri, Zeenat A. Shaikh, Ahmed H. Al-Naggar, Siddheshwar D. Raut, Tabassum Siddiqui, Hamdan M. Danamah, Vijaykumar V. Jadhav, Abdullah M. Al-Enizi, Rajaram S. Mane
Summary: This study explores a promising self-growth approach for the synthesis of nickel hydroxide (Ni(OH)2) nanosponge-balls on the surface of a nickel-foam (NiF) electrode. The modified NiF electrode, named Ni(OH)2@NiF, shows distinctive nanosponge-ball morphology and demonstrates excellent energy storage capability and electrocatalytic performance in both hydrogen and oxygen evolution reactions.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Rafael Del Olmo, Gregorio Guzman-Gonzalez, Oihane Sanz, Maria Forsyth, Nerea Casado
Summary: The use of Lithium-Ion Batteries (LIBs) is becoming increasingly extensive, and it is important to optimize the devices to achieve their maximum practical specific capacity. In this study, mixed ionic-electronic conducting (MIEC) binders based on PEDOT:PSS and PEDOT: PDADMA-TFSI were developed for Li-ion cathodes, and their performance was compared with conventional formulations. The influence of electrode formulations, including the addition of conducting carbon and an Organic Ionic Plastic Cristal (OIPC), was also analyzed. The proposed binders showed improved performance compared to conventional formulations with different electrolyte types and active materials.
ELECTROCHIMICA ACTA
(2024)
