Article
Energy & Fuels
Qinzheng Hu, Shuzhen Cui, Kanjun Sun, Xiuting Shi, Wenxing Miao, Xiangbing Wang, Hui Peng, Guofu Ma
Summary: The focus of recent research on flexible supercapacitors is to improve their energy density. A recent study has reported an improved energy storage method by adding suitable redox additives to gel electrolytes to enhance their redox activity. This study presents a novel stretchable and redox-active hydrogel electrolyte, prepared through polymerization and solvent displacement, which shows superior stretchability and high energy density. The introduction of a redox additive further enhances the specific capacitance and energy density. This study provides a new strategy for designing multifunctional redox hydrogel electrolytes.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Physical
Abbas Ali Hor, Neetu Yadav, S. A. Hashmi
Summary: Introducing redox-active species into the electrolyte component allows for additional pseudocapacitive redox activities at the electrode-electrolyte interfaces, improving the energy density of carbon supercapacitors. In this study, a quasisolid-state supercapacitor was developed using activated carbon electrodes and a redox-active gel polymer electrolyte (R-GPE) incorporated with an ionic liquid and a redox-additive IL, entrapped in a polymer matrix. The R-GPE showed excellent mechanical stability, wide thermal stability range, and high electrochemical properties, making it a promising substitute for liquid electrolytes in supercapacitors. The quasisolid-state supercapacitor demonstrated enhanced specific capacitance, specific energy, and maximum power due to the redox activities at the interfaces. It also exhibited good cycling performance with minimal fading in specific capacitance and high Coulombic efficiency.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Neetu Yadav, Nitish Yadav, S. A. Hashmi
Summary: The study introduces a quasi-solid-state supercapacitor with a nonaqueous gel polymer electrolyte (GPE) containing redox additive hydroquinone, showing high ionic conductivity and wide electrochemical stability window, making it a potential electrolyte for high-energy-density supercapacitors.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Jijian Zhang, Jingjing Wang, Danying Zuo, Jing Xu, Hongjun Li, Hongwei Zhang
Summary: A combined strategy is proposed to improve the electrochemical performance of aqueous zinc ion hybrid supercapacitors (ZIHS). This strategy includes engineering gel polymer electrolyte (GPE), protective layer for Zn anode, and redox reaction of catholyte. The optimized GPE shows high strength and satisfactory ionic conductivity. The ZIHS with this strategy demonstrates high energy density and ultra-long cycling stability. This strategy provides a meaningful guide for the design and construction of high-performance ZIHS devices.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Applied
Soobeom Lee, Geon-Hyoung An
Summary: Flexible fibrous supercapacitors (FFS) are considered as ideal energy storage devices for wearable electronics due to their high energy density, high safety, long cycle life, and simple manufacturing process. A novel FFS-SARE composed of surface-activated carbon fibers and a redox additive gel polymer electrolyte was fabricated, showing outstanding electrochemical performance and remarkable ultrafast cycling stability.
JOURNAL OF ENERGY CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Poulomi Nandi, Chandramouli Subramaniam
Summary: Remarkable improvement in the polarization and charge transport at the solid-solid electrode-electrolyte interface is achieved by incorporating a redox-active additive, sodium molybdate (Na2MoO4). The presence of this additive enhances the charge transport of the ionic liquid, resulting in higher ionic conductivity and a twofold increase in specific capacitance. This leads to a significant increase in the energy density and rate capability of the solid-state supercapacitor, surpassing other solid-state and liquid electrolyte-based devices.
ADVANCED MATERIALS INTERFACES
(2023)
Article
Engineering, Chemical
Jia Yang, Xiaoyi Hu, Xiaohan Fang, Lidan Fan, Gang Qin, Ziyue Zhang, Jingyi Xu, Ye Liang, Qiang Chen
Summary: A physically cross-linked double network alkaline gel polymer electrolyte (AGPE) membrane based on PVA and kappa-carrageenan was developed for practical application requirements of flexible supercapacitors. The AGPE membrane exhibited improved ionic conductivity and mechanical properties. By introducing a redox-active mediator, the fabricated supercapacitor achieved high electrode specific capacitance and energy density with excellent flexibility and low temperature resistance. This investigation offers a strategy for preparing gel polymer electrolyte membranes with potential applications in flexible, portable, and wearable electronics.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Jia Yang, Mengxiao Wang, Tao Chen, Xiang Yu, Gang Qin, Xiaohan Fang, Xiaoxiang Su, Qiang Chen
Summary: To meet the practical needs of flexible and wearable electronic equipment, a novel multifunctional gel polymer electrolyte (GPE) was developed for supercapacitors, which exhibited toughness, self-healing, and high specific capacitance. The GPE, composed of polyvinyl alcohol (PVA)-sodium alginate (SA)-K-3[Fe(CN)](6)-Na2SO4, utilized K-3[Fe(CN)](6) as a carrier donor, ionic crosslinking agent, and redox-active mediator, effectively balancing the conductivity and mechanical properties. The resulting supercapacitor showed outstanding bending and stretching stabilities, self-healing capability, and anti-freezing properties, making it promising for use in complex service conditions of flexible and wearable electronic equipment.
SCIENCE CHINA-MATERIALS
(2023)
Article
Energy & Fuels
Sara Ramandi, Mohammad H. Entezari
Summary: In this study, NiCo-LDH nanosheets derived from Co-ZIF grown on graphene/polyaniline nanotube@cotton cloth were synthesized and showed promising performance as electrode materials for supercapacitors. The hetero-structure of the materials resulted in a high surface area and more electrochemical active sites, leading to improved supercapacitor performance. The use of a redox-additive electrolyte further enhanced the electrochemical performance of the NiCo-LDH/G/PANI-NT@CC electrode. The long-term stability test demonstrated good cycling stability, making NiCo-LDH/G/PANI-NT@CC a suitable candidate for high-performance supercapacitors.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Energy & Fuels
G. Hariharan, S. Arunpandiyan, V. Shanmugapriya, S. Bharathi, M. Babu, B. Selvakumar, A. Arivarasan
Summary: The electrochemical performances of Zinc oxide/Nickel oxide loaded multi-walled carbon nanotubes were evaluated under different electrolytes. The synthesized nanocomposites were characterized for their structural and morphological properties. The modified working electrodes exhibited superior electrochemical performance and specific capacitance retention, indicating the potential of these materials for energy storage applications.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Engineering, Environmental
Hyo Jun Min, Min Su Park, Miso Kang, Jong Hak Kim
Summary: A polymer electrolyte based on a zwitterionic graft copolymer was developed in this study, utilizing the excellent properties of PVA main chains and PSBMA side chains to improve ion conductivity. When applied to EDLC, the new electrolyte showed significantly improved performance, attributed to higher ion conductivity and better electrode/electrolyte interface compatibility.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Zhixing Zhao, Yun Huang, He Zheng, Ling Zhao, Jiapin Liu, Chao Zou, Zhi Dong, Xing Li, Mingshan Wang, Yuanhua Lin
Summary: This study presents a crosslinking cotton fiber-/PVA-based membrane (CPM) with high porosity and liquid electrolyte uptake. By incorporating Al3+ into Li2SO4 electrolyte, the electrochemical stability is improved and the specific capacitance of the supercapacitor is enhanced. The findings offer a potential way to design high-output-voltage aqueous supercapacitors through electrolytes and membrane strategies.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Biochemistry & Molecular Biology
Yueqin Li, Chen Chen, Lin Han, Zichun Lu, Ning Zhang, Runtian Miao
Summary: In this study, lignosulfonate sodium (LS) was used as a template to synthesize LS-PEDOT conductive nanofillers, leading to improved capacitance performance of PEDOT-based hydrogel devices.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2024)
Article
Electrochemistry
Wei-Cheng Li, Ren-Kai Chen, Ten-Chin Wen
Summary: This study investigates the role of nano-hydroxyapatite bearing zwitterion in carboxylated chitosan hydrogel electrolyte for improved supercapacitor performance. The successful synthesis of the composite is confirmed by various characterization techniques. The results show that the addition of nano-hydroxyapatite bearing zwitterion significantly enhances the performance of supercapacitors.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Physical
Qiyu Wang, Xiangqun Xu, Bo Hong, Maohui Bai, Jie Li, Zhian Zhang, Yanqing Lai
Summary: Quasi-solid-state lithium metal batteries with gel polymer electrolyte exhibit high ionic conductivity and stability towards Li metal anode, allowing for long cycling life with capacity retention. The design of the polymer skeleton provides new insights for solid-state battery optimization different from intrinsic properties of electrolyte, offering new opportunities for practical manufacturing of lithium metal batteries.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Engineering, Environmental
Bit Na Choi, Jung Yong Seo, Zongfu An, Pil J. Yoo, Chan-Hwa Chung
Summary: Photocatalytic CO2 reduction is a promising technology for converting carbon dioxide into valuable chemicals. This study investigated the use of an inorganic halide perovskite-based photocatalyst with a copper scaffold as a co-catalyst. The results showed that the combination of the two catalyst materials significantly improved the conversion efficiency and product selectivity, leading to the production of a variety of useful chemicals. The use of a porous copper scaffold also enhanced the light harvesting ability of the photocatalyst.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Min Hye Jeong, Dong Hyung Lee, Ji Won Moon, Jian Sun, Jae Soon Choi, Dae Sik Hong, Chan-Hwa Chung, Jong Wook Bae
Summary: The Ce-incorporated FeTiOx catalysts exhibit improved cyclic stability and catalytic performance in the oxidative dehydrogenation and CO2 activation reactions. The incorporation of CeO2 enhances oxygen storage capacity and facilitates redox processes, leading to enhanced lattice oxygen mobility and catalytic performance.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Jae Wook Lee, Byeongkyu Kim, Jung Yong Seo, Yong Seok Kim, Pil J. Yoo, Chan-Hwa Chung
Summary: In this study, a hybrid electrochemical system with three electrolyte chambers was constructed to reduce the energy required for water electrolysis. Through simultaneous operation of hydrogen and oxygen evolution reactions under different pH conditions, the theoretical voltage for water electrolysis was significantly decreased. This system offers a lower voltage for water electrolysis compared to conventional systems.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Environmental
Shiyu Xu, Peng Zhang, Hao Li, Zhengyang Li, Zongfu An, Chan-Hwa Chung, Jin Yong Lee, Ji Man Kim, Pil J. Yoo
Summary: The hydrogen evolution reaction (HER) is an important process for clean hydrogen energy production. This study successfully synthesized a novel electrocatalyst consisting of Re nanoflowers grown on a carbon cloth surface. The ReNF@CC electrocatalyst exhibited high performance in HER, with low overpotentials and superior durability compared to commercial Pt/C. This study provides a versatile strategy for efficient water electrolysis in different media.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Xu Wang, So Yun Jeong, Hyun Seung Jung, Dongming Shen, Mansoor Ali, Faisal Zafar, Chan-Hwa Chung, Jong Wook Bae
Summary: The core-shell structure of Cu-ZnO-Al2O3 metal oxide and ferrierite zeolite (FER) was investigated for direct CO2 hydrogenation to DME. The addition of SiO2 physically-coated interlayers effectively suppressed the detrimental effects of metal ions on FER surfaces, resulting in increased CO selectivity and catalyst stability.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Multidisciplinary
Muhammad Tajmeel Feroze, Dulyawat Doonyapisut, Byeongkyu Kim, Chan-Hwa Chung
Summary: Copper oxide with activated carbon-based materials was synthesized and used for selective detection of amoxicillin in aqueous samples. The materials were evaluated for their morphological and structural characteristics using scanning electron microscope and X-ray diffraction. The system's electrochemical response was observed through electrochemical impedance spectroscopy and voltammetric techniques. The electrode showed good repeatability and selectivity in determining amoxicillin.
KOREAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Shiyu Xu, Peng Zhang, Zhengyang Li, Chan-Hwa Chung, Myoung-Woon Moon, Ji Man Kim, Pil J. Yoo
Summary: In this study, Ru was alloyed with Re to improve its electronic density distribution, and the self-aggregation of Ru0.48Re0.52NPs was prevented by incorporating reduced graphene oxide (rGO) support, resulting in improved conductivity and electrochemical durability. The Ru0.48Re0.52NPs@rGO exhibited remarkable hydrogen evolution reaction (HER) performance, surpassing both the activity and cost of commercialized Pt/C.
APPLIED SURFACE SCIENCE
(2023)
Article
Automation & Control Systems
Dulyawat Doonyapisut, Byeongkyu Kim, Jung Kyu Kim, Eunseok Lee, Chan-Hwa Chung
Summary: Advancements in energy storage, photocatalysis, and sensors have generated large amounts of electrochemical impedance (EIS) data. Interpreting this data is challenging, but recent progress in machine learning (ML) models for EIS classification has been made. However, most models lack physical descriptor representation. In this study, variational autoencoders (VAE) were applied to EIS data analysis, achieving accurate classification, parameter prediction, and physical descriptor visualization.
ENGINEERING APPLICATIONS OF ARTIFICIAL INTELLIGENCE
(2023)
Article
Energy & Fuels
Yong Min Park, Byeong Gi Kim, Xinhua Gao, Xingjun Zhang, Hyun-Seog Roh, Chan-Hwa Chung, Jong Wook Bae
Summary: The highly ordered mesoporous structures of Co3O4-Al2O3 mixed metal oxide, prepared using a hard template of mesoporous KIT-6, showed higher catalytic activity and stability for CO2 hydrogenation to synthetic methane at a surface Al content of approximately 6 wt% (m-CoAl(1)). The enhanced CO2 conversion (42.5%) and CH4 selectivity (96.7%) were attributed to the adjusted surface hydrophobicity by incorporating an optimal amount of spinel CoAl2O4 phases, which acted as structural stabilizers and generated more hydrophobic surfaces. The interaction between Co3O4-Al2O3 was selectively strengthened by an optimal amount of spinel CoAl2O4 phases, improving the surface hydrophobicity and oxygen vacant sites to effectively inhibit the competitive adsorption of water produced during CO2 hydrogenation.
Article
Chemistry, Applied
Jae Min Park, Ji Su Yu, Jae Hyeon Kwon, Chan-Hwa Chung, Hyun-Seog Roh, Xinhua Gao, Jong Wook Bae
Summary: By introducing a coating layer of four different metal oxides (CeO2, ZrO2, SiO2, and Al2O3) on the coprecipitated hydrotalcite-like Ni-MgAl2O4 (NiMgAl), the thermal stability of Ni nanoparticles in the dry reforming reaction of CH4 with CO2 (DRM) was enhanced. Among the catalysts, NiMgAl@Al showed superior catalytic properties due to the stronger metal support interaction (SMSI) resulting from the spatially confined Ni nanoparticles on the MgAl2O4 frameworks through exsolution phenomena facilitated by the porous Al2O3 overlayers. The simpler overlayer coating method, especially with porous Al2O3 coating layer, was found to be an effective way to achieve superior catalytic activity and stability by preserving thermally stable smaller Ni nanoparticles on the Ni-MgAl2O4 surfaces.
FUEL PROCESSING TECHNOLOGY
(2023)
Article
Energy & Fuels
Yong Seok Kim, Jae Wook Lee, Byeongkyu Kim, Jong Wook Bae, Chan-Hwa Chung
Summary: A carbon-neutralized direct methanol fuel cell (DMFC) with two bifunctional electrodes, Pd-Ag and Pt-Zn, has been developed in this study. The system operates in two modes: fuel-cell mode and spontaneous CO2 reduction mode. The Pd-Ag electrode oxidizes methanol to CO2 and generates electricity in the fuel-cell mode, while CO2 is spontaneously reduced to CO on Pd-Ag in the next step. In contrast, Pt catalyzes oxygen reduction and Zn is sacrificially oxidized in the fuel-cell and CO2 reduction modes, respectively. The power densities in the fuel-cell and CO2 reduction modes are 12.11 mW/cm² and 11.76 mW/cm², respectively, with faradaic efficiencies of 98.81% for CO2 and 89.11% for CO.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Yong Seok Kim, Byeongkyu Kim, Tae Yup Jeong, Na Hyeon Kim, Eunchae Ko, Jong Wook Bae, Chan-Hwa Chung
Summary: An gaseous CO2 reduction system using an aqueous hydrazine oxidation reaction is proposed for converting CO2 into value-added products. This system demonstrates high power density and CO2 conversion rate. The correlation between the flow rate of the anolyte and the hydrophobicity of the Ag cathode in terms of cell performance is also evaluated.
JOURNAL OF CO2 UTILIZATION
(2023)
Article
Energy & Fuels
Byeongkyu Kim, Yong Seok Kim, Doonyapisut Dulyawat, Chan-Hwa Chung
Summary: A hybrid RFB cell with three-electrolyte chambers is designed to expand the potential window and improve performance of the Zn-Mn redox pair. However, stability issues due to MnO2 precipitation in the electrolyte are addressed by modifying the cathode with an Ag-based metal-organic framework (MOF) and an Ag electro-catalyst. The system design enables stable and superior cell performance during charge-discharge cycles.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Automation & Control Systems
Dulyawat Doonyapisut, Padmanathan-Karthick Kannan, Byeongkyu Kim, Jung Kyu Kim, Eunseok Lee, Chan-Hwa Chung
Summary: Technology advancements have led to the generation of large amounts of impedimetric data in the fields of energy storage, photocatalysis, and sensors. Electrochemical impedance spectroscopy (EIS) plays a crucial role in analyzing material interfacial properties, but it is often misinterpreted due to system complexity or compromises between experimental and theoretical models. In this study, a machine-learning strategy using a deep neural network (DNN) is demonstrated for EIS circuit model classification and parameter prediction. The DNN model shows high accuracy as a classifier and can accurately predict EIS parameters in complex systems, indicating the potential of machine learning in studying electrochemical systems.
ADVANCED INTELLIGENT SYSTEMS
(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)
