Article
Chemistry, Physical
Yachao Zhu, Guoshen Yang, Xuhao Wan, Jie Deng, Tobias F. Burton, Siraprapha Deebansok, Dodzi Zigah, Hang Zhou, Yuzheng Guo, Olivier Fontaine
Summary: A new redox mediator, Thionine, was used as a supercapacitor electrolyte in highly concentrated LiTFSI to investigate the charging mechanisms in mesoporous materials. The presence of Th modified the viscosity and thermal properties of the electrolyte without affecting its ionic conductivity. Molecular Dynamics (MD) and Density Functional Theory (DFT) simulations revealed the adsorption and charging mechanisms of Thionine in mesoporous carbon.
ENERGY STORAGE MATERIALS
(2023)
Article
Energy & Fuels
Prem Sagar Shukla, Anant Agrawal, Anurag Gaur, G. D. Varma
Summary: This study investigates the effect of Zn doping on the electrochemical properties of MnCo2O4 (MCO). The results show that Zn doping significantly improves the electrode's BET surface area and mesoporous distribution, leading to enhanced electrochemical characteristics. The constructed ASC device demonstrates excellent performance in terms of energy density, power density, and cycle stability.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Energy & Fuels
Nazish Parveen, Sajid Ali Ansari, Batool Taher Al-Abawi, Mohammad Omaish Ansari
Summary: Hierarchical three dimensional nanoflakes (H3DN) of nickel oxide (NiO) were successfully designed and grown on carbon microfibers (CMF) as a binder free electrode material for supercapacitor applications via a facile hydrothermal method, exhibiting superior electrochemical performance and cyclic stability.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Energy & Fuels
Prem Sagar Shukla, Anant Agrawal, Anurag Gaur, G. D. Varma
Summary: MnCo2O4@MoS2 (MCOS) nanocomposites synthesized through co-precipitation process exhibit significant enhancement in electrochemical characteristics, attributed to its larger specific surface area and mesoporous distribution. MCOS nanocomposite as a single electrode shows larger specific capacitances and good rate capability, as well as excellent cycling stability even at high current density. An asymmetric supercapacitor device fabricated with MCOS20 nanocomposite as cathode and commercial activated carbon as anode demonstrates the highest specific energy density and power density, along with excellent stability in KOH gel electrolyte.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Physical
Mingjun Pang, Wenxiu He, Zhaoyang Song, Ruxia Zhang, Shang Jiang, Miaomiao Mao, Min Pang, Runwei Wang, Jianguo Zhao
Summary: Mg/Co(OH)F precursors were prepared by a hydrothermal method and subsequent high-temperature treatment to yield stable MPO/CP composite electrode materials. The optimized MPO/CP nano-walls exhibited superior energy storage performance, including high specific capacitance, rate retention, and cycling stability. The MPO/CP material with modified electrochemical properties is a promising candidate for energy storage applications, as demonstrated by its high energy density and excellent stability.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Physical
Iqra Rabani, K. Karuppasamy, Dhanasekaran Vikraman, Zia ul Haq, Hyun-Seok Kim, Young-Soo Seo
Summary: Developed a well-organized composite material based on rare earth metals for potential use as electrodes in high-performance supercapacitors. Through experimentation, the hierarchical nano-polyhedrons showed promising applications in energy storage with excellent capacitance and cyclic stability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Green & Sustainable Science & Technology
Xiaodong Xu, Krzysztof Sielicki, Jiakang Min, Jiaxin Li, Chuncheng Hao, Xin Wen, Xuecheng Chen, Ewa Mijowska
Summary: A method was developed to convert waste wolfberry fruits into porous carbon materials and applied them in supercapacitors. The fabricated carbon materials exhibited large specific surface area and hierarchical porosity, showing excellent capacitance performance and cycling stability. This study provided a facile and low-cost approach to recycle renewable biowastes into high-valued carbon materials and further expanded their application in high-performance energy storage devices.
Article
Chemistry, Physical
Liping Feng, Mingju Wang, Yunzhen Chang, Hua Song, Wenjing Hou, Ying Zhang, Yaoming Xiao, Sheng Zhu, Gaoyi Han
Summary: A facile strategy of polymerization-pyrolysis was reported to construct hierarchical nitrogen-doped porous carbon with rich surface nitrogen species. The hierarchical carbon exhibits a large specific surface area and multi-scale porous structures, leading to high specific capacitance and desirable supercapacitor performance.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Shang Jiang, Mingjun Pang, Yaqin Du, Jingwei Li, Wenxiu He, Miaomiao Mao, Min Pang, Runwei Wang, Qiliang Pan, Jianguo Zhao
Summary: In this study, a unique sulfurization/phosphorylation transformation method was used to create S-P-CoxNiy, a Co-Ni bimetallic nanoparticle with S and P coordinated. The electrode exhibited higher capacitive capabilities due to its unique structure and synergistic component. The as-obtained S-P-Co1Ni4 electrode showed the highest performance, with a specific capacitance of 1739.3 F g-1 at a 1 Ag-1 current density and strong cycle stability with retention of 92.6% after 10,000 cycles. The excellent electrochemical performance of S-P-Co1Ni4 can be attributed to the high conductivity of sulfur, high stability of phosphide, multivalent states of nickel and cobalt, and tremendous synergy. The developed AC/S-P-Co1Ni4 asymmetric supercapacitor exhibited a high energy density of 42.7 Wh kg-1 at a power density of 703.9 W kg-1 and a good specific capacitance of 156.89 F g-1 at 1 Ag-1, with a remarkable stability of 90.5% after 10,000 cycles at 10 A g-1. Therefore, the developed electrode material holds great promise for use in energy storage devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Yu Liu, Zhenlin Ma, Na Xin, Yulong Ying, Weidong Shi
Summary: In this study, P-doped NiCo2O4/NiMoO4 multi-dimensional nanostructures were successfully synthesized as electrode materials for supercapacitors, exhibiting high specific capacitance at low current density and excellent cycle stability at high current density. A hybrid supercapacitor device was prepared with high energy density at low power density, and showed excellent capacity retention rate after a large number of cycles, demonstrating the huge potential of multi-dimensional metal oxides in energy storage.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Energy & Fuels
Heri Rustamaji, Tirto Prakoso, Hary Devianto, Pramujo Widiatmoko, Wibawa Hendra Saputera
Summary: This study synthesized urea nitrogenated activated carbon (N-ACU) from oil palm empty fruit bunches and investigated its performance as a supercapacitor electrode. The results showed that the urea to hydrochar impregnation ratio affected the characteristics of N-ACU and the performance of supercapacitors. Urea nitrogenated treatment on activated carbon reduced resistance and maintained the stability of the supercapacitor. This study suggests that synthesizing nitrogenated activated carbon from biomass waste is a promising method for producing electrode materials.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Chemistry, Multidisciplinary
Baoying Lin, Yinyin Zheng, Jinglu Wang, Qian Tu, Wentao Tang, Liangzhe Chen
Summary: The emergence of the Internet of things has led to an increased demand for flexible and miniaturized supercapacitors. This study focuses on the fabrication of screen-printed electrodes using hierarchical V3O7 with rodlike texture, which exhibits excellent capacitance retention and cycling stability. Furthermore, a flexible V3O7 symmetrical supercapacitor shows outstanding areal specific capacitance, cycling stability, energy density, flexibility, and durability. This work provides a facile and low-cost reference for large-scale fabrication of flexible supercapacitors using screen-printed ink.
Article
Energy & Fuels
Jie Zeng, Kamakshaiah Charyulu Devarayapalli, S. V. Prabhakar Vattikuti, Jaesool Shim
Summary: In this study, a novel three-dimensional hollow microsphere hierarchical structure of nickel-zinc MOFs (NZMF/CF) was successfully fabricated on carbon fabric as a binder-free electrode for supercapacitor applications. The NZMF/CF electrode showed higher rate capacity and specific capacitance compared to NZMF, leading to a superior energy density and cyclic stability in a split cell asymmetric supercapacitor device (SC-ASD). This research provides a versatile scheme for efficiently preparing MOF-based binder-free energy storage materials for future hybrid and flexible electronic devices.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
Jian Lan, Hongying Hou, Xianxi Liu, Xiaohua Yu, Ju Rong, Fangshu Chen
Summary: Hierarchical dumbbell-like Fe3O4/C powder was synthesized for the supercapacitor electrode, showing higher reversible capacitances and remarkable cycle stability. The electrode exhibited a high energy density at high power and is feasible for high-performance supercapacitor applications.
Article
Electrochemistry
Ang Li, Mei Yi, Shuimiao Zhao, Mingxing Luan, Jingbo Hu
Summary: Rational construction of heterostructures can compensate for the property shortfalls of a single component. This article reports a unique CuCo carbonate hydroxide nanowires@FeCo-layered double hydroxide hexagonal nanosheets material and demonstrates its superior electrochemical performance.
BATTERIES & SUPERCAPS
(2022)
Article
Chemistry, Multidisciplinary
Urbi Pal, Dmitrii Rakov, Bingyu Lu, Baharak Sayahpour, Fangfang Chen, Binayak Roy, Douglas R. MacFarlane, Michel Armand, Patrick C. Howlett, Ying Shirley Meng, Maria Forsyth
Summary: Future rechargeable Li metal batteries require a rational electrolyte design to improve cycling performance. This study reports an ether-ionic liquid electrolyte with excellent Li metal deposition, high voltage stability, and non-flammability. Experimental results demonstrate high-performance cycling with high coulombic efficiency even at high practical areal capacity.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Samantha L. Piper, Mega Kar, Douglas R. MacFarlane, Karolina Matuszek, Jennifer M. Pringle
Summary: Ionic liquids as phase change materials for thermal energy storage offer significant advantages and potential to replace conventional materials. Emerging design rules in this field provide a reference for optimizing thermal properties and offer important guidance for future directions.
Letter
Chemistry, Physical
Jaecheol Choi, Hoang-Long Du, Manjunath Chatti, Bryan H. R. Suryanto, Alexandr N. Simonov, Douglas R. MacFarlane
Article
Nanoscience & Nanotechnology
Thanh Tran-Phu, Hongjun Chen, Rahman Daiyan, Manjunath Chatti, Borui Liu, Rose Amal, Yun Liu, Douglas R. Macfarlane, Alexandr N. Simonov, Antonio Tricoli
Summary: The addition of a dielectric nanoscale-thin layer made of amorphous TiO2 on low-cost Co3O4 nanostructured anodes enhances their stability and electrocatalytic activity for oxygen evolution reaction (OER). An optimal thickness of 4.4 nm for the TiO2 layer improves the anode lifetime by a factor of approximately 3, enabling 80 hours of continuous electrolysis at near-zero pH while maintaining high OER catalytic activity.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Melinda Krebsz, Sam Johnston, Cuong Ky Nguyen, Yvonne Hora, Binayak Roy, Alexandr N. Simonov, Douglas R. MacFarlane
Summary: The composition of the electrolyte solution significantly affects the kinetics and coulombic efficiency of the electrochemical magnesium plating and stripping processes. This study systematically investigated the Mg0/2+ process with different combinations of electrolytes in the DME solvent. The results showed that the presence of BH4- is essential for high coulombic efficiency, while the presence of Li+ and TFSI- is necessary for high rates and preventing passivation of the magnesium surface. The optimal Mg0/2+ performance was achieved at a mole ratio of [Mg(BH4)(2)]:[LiTFSI] of 1:2.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Tam D. Nguyen, Dijon A. Hoogeveen, Pavel Cherepanov, Khang N. Dinh, Daniel van Zeil, Joseph F. Varga, Douglas R. MacFarlane, Alexandr N. Simonov
Summary: This research introduces a new oxygen evolution reaction (OER) catalyst using copper inverse opal structures as highly conductive high-surface-area supports. The catalyst shows significantly higher OER activity in 1 mol/L KOH and is compatible with membrane electrolyzers.
Article
Multidisciplinary Sciences
Hoang-Long Du, Manjunath Chatti, Rebecca Y. Hodgetts, Pavel Cherepanov, Cuong K. Nguyen, Karolina Matuszek, Douglas R. MacFarlane, Alexandr N. Simonov
Summary: Ammonia is considered a potential replacement for carbon-based fuels and a carrier for global renewable energy transportation, with the need to transform existing NH3 production technology into a simpler and scale-flexible electrochemical lithium-mediated nitrogen reduction reaction.
Article
Chemistry, Physical
Dale T. Duncan, Binayak Roy, Samantha L. Piper, Cuong Nguyen, Patrick Howlett, Maria Forsyth, Douglas R. MacFarlane, Ju Sun, Mega Kar
Summary: This study focuses on the synthesis and characterization of highly fluorinated borate ester anions as sodium salts in a solvent. The results show that the synthesized NaB(hfip)4 center dot 3DME exhibits high ionicity, excellent oxidative stability, and desired passivation behavior towards aluminum surfaces. It also exhibits impressive cycling behavior in sodium metal symmetrical cells.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Review
Chemistry, Multidisciplinary
Karolina Matuszek, Mega Kar, Jennifer M. Pringle, Douglas R. MacFarlane
Summary: Thermal energy storage technologies utilizing phase change materials can mitigate the intermittency issues of wind and solar energy by storing energy in the form of heat. However, the lack of practical phase change materials due to stability and safety concerns remains a major challenge.
Article
Chemistry, Multidisciplinary
Hoang-Long Du, Karolina Matuszek, Rebecca Y. Hodgetts, Khang Ngoc Dinh, Pavel V. Cherepanov, Jacinta M. Bakker, Douglas R. MacFarlane, Alexandr N. Simonov
Summary: Electrochemical lithium-mediated nitrogen reduction can be used to synthesize ammonia from renewables, but integrating it into electrolyzer devices is challenging due to the lack of understanding of the relationship between performance and proton transport parameters. In this study, a top-performance N-2 electroreduction system was used to investigate the correlation between reaction metrics and proton carrier properties, including alcohols, a phosphonium cation, tetrahydrofuran, a Bronsted acid, ammonium, and water. The study showed that optimized electrolyte compositions are required for productive carriers, and ammonia electrosynthesis with the phosphonium cation and iso-propanol achieved performance close to the ethanol benchmark. It was also found that ethanol undergoes irreversible degradation through reaction with oxidized solvent, unlike iso-propanol and phosphonium cation proton carriers.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Jennifer N. Murphy, Tiago Mendes, Francesca M. Kerton, Douglas R. MacFarlane
Summary: Supercapacitors are important in the transition to cleaner, renewable energy. By adding biorenewable calcite from mussel shells, the conductivity of solid-state electrolytes can be improved.
Article
Chemistry, Physical
Douglas R. MacFarlane, Alexandr N. Simonov, Thi Mung Vu, Sam Johnston, Luis Miguel Azofra
Summary: The activation of dinitrogen plays a crucial role in the production of nitrogen compounds and is of fundamental importance in chemistry. This paper provides an overview of different approaches and their commonalities, aiming to establish connections for further advancements in sustainable nitrogen activation. Experimental aspects, including the positive role of increasing nitrogen pressure, are explored, along with insights on when N-15(2) experiments may or may not be necessary. Deconstructing the nitrogen reduction reaction, the paper offers a unified framework to understand the different approaches and components involved. Regarding sustainability, the authors argue that while green ammonia from a green-H-2-fed Haber-Bosch process seems promising, there is a pressing need for other sustainable approaches in real-world contexts.
FARADAY DISCUSSIONS
(2023)
Article
Chemistry, Physical
Dale T. Duncan, Samantha L. Piper, Maria Forsyth, Douglas R. MacFarlane, Mega Kar
Summary: High-voltage sodium batteries are a promising solution for economical energy storage applications. Currently available electrolyte materials have limited success in such applications, thus the search for high-performing and safer alternatives is urgent. This study synthesizes six novel ionic liquids derived from two fluoroborate anions, which have shown great promise in recent battery literature. One of the synthesized ionic liquids, N-ethyl-N,N,N-tris(2-(2-methoxyethoxy)ethyl)ammonium (tetrakis)hexafluoroisopropoxy borate, exhibits promising physical properties and electrochemical performance, making it a potential high-voltage sodium electrolyte material.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Kaiqiang He, Yaoxin Hu, Ze-Xian Low, Ruoxin Wang, Fanmengjing Wang, Hongyu Ma, Xiaofang Chen, Douglas R. MacFarlane, Huanting Wang
Summary: In this study, ultrathin poly(furfuryl alcohol) nanocomposite layer was fabricated on a porous alumina support using FeCoNi oxyhydroxide nanosheets, and a carbon molecular sieve membrane was produced through carbonization. The transformation of FeCoNi oxyhydroxide nanosheets during the pyrolysis process improved the gas permeance of the carbon membrane, resulting in an excellent gas separation performance.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Chemistry, Physical
Pilar Carro, Jaecheol Choi, Douglas R. MacFarlane, Alexandr N. Simonov, Jose Miguel Dona-Rodriguez, Luis Miguel Azofra
Summary: The production of green ammonia through electrochemical reduction of N-2 is a major challenge in applied catalysis. This study used density functional theory (DFT) to analyze the efficiency of NRR compared to HER on various metal catalysts and found that NRR is less favored. Additionally, an analysis of nitrogen oxides (especially NO and NO2) as impurities in NRR experiments showed that they can effectively compete with HER in ammonia formation. These findings provide insights for the design of catalysts for nitrogen oxide reduction reactions.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
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)
