Article
Nanoscience & Nanotechnology
Georgina Jeerh, Peimiao Zou, Mengfei Zhang, Shanwen Tao
Summary: To maximize fuel cell performance, a well-constructed microstructure in the catalyst layer (CL) is crucial for the effective transportation of electrons, ions, and reactants. In this study, a cathode CL for a direct ammonia fuel cell (DAFC) was designed and optimized using a perovskite oxide catalyst to reduce reliance on platinum group metals (PGMs). The results showed that the carbon, ionomer, and polytetrafluoroethylene (PTFE) content in the cathode CLs (CCLs) had a significant impact on the performance of the DAFCs. By optimizing these components, the maximum current density and peak power density were substantially increased, highlighting the importance of an effective three-phase interface.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Hyun Soo Park, Heon Jun Jeong, Keun-hee Kim, Wanhyuk Chang, Yoon Seong Kim, Yoon Seong Choi, Joon Hyung Shim
Summary: This study demonstrates the performance improvement of a protonic ceramic fuel cell (PCFC) by applying a CoOx nanoparticle treatment to a PrBa(0.5)Sr(0.5)Co(2-x)FexO(5+delta)(PBSCF) cathode with a perovskite structure. The deposition of CoOx nanoparticles on the surface of the cathode using plasma-enhanced atomic layer deposition (ALD) process results in uniform distribution and a constant deposition rate. The treated cells show a 36% increase in performance compared to untreated cells at an operating temperature of 650 degrees C, indicating the potential of the proposed method for high-performance PCFC fabrication and lower operating temperatures.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Yuxuan Lou, Mingsheng Hao, Yinshi Li
Summary: This study utilizes machine learning (ML) to predict, analyze, and optimize the cathode catalyst layer (CCL) in proton exchange membrane fuel cells (PEMFCs). By constructing a data-driven model, the relationship between CCL structure and cell performance is investigated, and critical parameters are determined for multi-objective optimization. The optimized CCL significantly improves cell performance.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
Xiang Lyu, Tim Van Cleve, Erica Young, Jianlin Li, Haoran Yu, David A. Cullen, K. C. Neyerlin, Alexey Serov
Summary: Proton exchange membrane fuel cells (PEMFCs) powered by green hydrogen (H2) are a promising alternative to traditional hydrocarbon-fueled power generators. However, further improvements are needed in efficiency, durability, and low-cost production for widespread adoption. Most strategies to improve PEMFC electrodes utilize single material sets, but anisotropic electrode structures with locally tunable properties may offer enhanced performance due to improved transport.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Shaojun Dou, Liang Hao, Hong Liu
Summary: This study presents a pore-scale simulation of water capillary condensation in the cathode catalyst layer of proton exchange membrane fuel cells and investigates the effects of porosity and wettability on water distribution, gas transport, and proton conduction.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Sungyu Choi, Jiyoon Jeon, Junsu Chae, Seongmin Yuk, Dong-Hyun Lee, Gisu Doo, Dong Wook Lee, Jonghyun Hyun, Jiyun Kwen, Siyoung Q. Choi, Hee-Tak Kim
Summary: The researchers successfully fabricated a multiscale porous catalyst layer using the emulsion template method, improving the mass transport property of low Pt-loaded fuel cells.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Zhenxin Lin, Kai Zhao, Gang Cheng, Shuozhen Hu, Min Chen, Jun Li, Dongchu Chen, Qing Xu, Menglei Chang, Ogenko Volodymyr
Summary: A novel NiMo-Yttira-stabilized zirconia (YSZ) catalyst-layer supported tubular single cell is developed for solid oxide fuel cells running on methane. The NiMo-YSZ layer shows excellent reforming performance with high methane conversion, H2 and CO yield. The single cell demonstrates good electrochemical performance and stability, making it a promising option for direct operation in CH4/Air environments.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Physical
Xing Li, Yuze Hou, Chengru Wu, Qing Du, Kui Jiao
Summary: An optimum balance between performance and Pt loading is crucial for the commercialization of PEM fuel cells. This study develops an advanced pore-scale model to investigate the interlink between Pt loading, reactive transport, and performance. The results show that Pt loading has little effect on electronic potential drop but significantly affects ionic potential drop. The distribution of local overpotential and reaction rate is correlated with the importance of proton conduction.
NANOSCALE HORIZONS
(2022)
Article
Chemistry, Physical
Kanji Otsuji, Naoki Yokota, Donald A. Tryk, Katsuyoshi Kakinuma, Kenji Miyatake, Makoto Uchida
Summary: Research focuses on water management challenges and improvements in cell performance for anion exchange membrane fuel cells (AEMFCs) using a non-PGM catalyst and an in-house-developed anion exchange ionomer. Results show that water plays a critical role in the cathode reaction and that the hysteresis effect is related to water supply to the cathode using the Fe-N-C catalyst. Managing water is essential for high-performance AEMFCs.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Analytical
Abdelaziz Samris, Hamid Mounir, Abdellatif El Marjani
Summary: Platinum dispersity and charge significantly influence the performance of PEM fuel cells, with high dispersity reducing voltage and potentially lowering costs. Experimental data validated a mathematical model analyzing the impact of these parameters on oxygen reduction reactions at the cathode side of the fuel cell.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Engineering, Environmental
Bi-Lin Lai, Hai-Xia Liao, Shu-Qi Zhou, Hui-Xu Wei, Ai-Yi Li, Nan Li, Zhao-Qing Liu
Summary: This study successfully prepared a series of chalcogen-modified copper and nitrogen co-doped catalysts, which showed improved oxygen reduction reaction (ORR) performance through proper chalcogen doping while maintaining antibacterial properties. Among these catalysts, the optimized Cu2S@Cu-SNC-2 catalyst exhibited excellent durability and ORR activity, outperforming the commercial Pt/C catalyst. The MFC based on Cu2S@Cu-SNC-2 also achieved significantly higher power density and had fewer cathode biofilms.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Sezer Onbilgin, Cigdem Timurkutluk, Bora Timurkutluk, Selahattin Celik
Summary: This study experimentally investigates the effect of contact pressure on the performance of electrolyte supported planar solid oxide fuel cells (SOFCs) by varying the pressure applied on the push rod. The results show that there is no linear relationship between the active area and the applied external pressure, and that adjusting the external load according to the cell size is necessary to achieve similar power densities.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Energy & Fuels
Takahiro Saida, Kan Sakakibara, Ryohei Igami, Takahiro Maruyama
Summary: This study investigates the use of carbon spheres as a catalyst support in polymer electrolyte fuel cells. The carbon spheres promote diffusion and improve platinum utilization by supporting highly dispersed platinum nanoparticles. The study finds that the platinum utilization rate and oxygen reduction reaction activity are enhanced with the use of carbon spheres as the catalyst support.
Article
Chemistry, Physical
Kanji Otsuji, Yuto Shirase, Takayuki Asakawa, Naoki Yokota, Katsuya Nagase, Weilin Xu, Ping Song, Shuanjin Wang, Donald A. Tryk, Katsuyoshi Kakinuma, Junji Inukai, Kenji Miyatake, Makoto Uchida
Summary: Water management is a major issue in anion exchange membrane fuel cells (AEMFCs). This study identifies the problem and proposes two approaches to address it: improving water diffusivity at the membrane surface and using a hydrophobic catalyst to prevent water absorption. These strategies alleviate voltage losses and improve performance in AEMFCs.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
Chao-Chin Chang, Chun-Wei Yeh, Chang-Ping Yu
Summary: Urine microbial fuel cells have the potential to treat urine and generate electricity. There are different factors affecting the performance of urine MFCs during scaling up. Unstable anode potential leads to energy loss while unstable cathode potential results in power loss. Analysis of impedance spectroscopy and microbial community can guide the improvement of different connection strategies.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Multidisciplinary
Xiaolong Zhao, Yifei Wang, Yingguang Zhang, Shijing Luo, Huimin Zhang, Dennis Y. C. Leung
Summary: In this study, exfoliated graphite was obtained by microwave irradiation and used as a support for nickel-iron layered double hydroxide to create an efficient and low-cost urea oxidation catalyst. The catalyst showed excellent performance and stability in a dual-electrolyte direct urea fuel cell.
Article
Chemistry, Physical
Kee Wah Leong, Wending Pan, Yifei Wang, Shijing Luo, Xiaolong Zhao, Dennis Y. C. Leung
Summary: In this work, reversible, aqueous Mg battery chemistry has been achieved for the first time by regulating Cl- and using MgCl2 water-in-salt (WIS) electrolyte to convert the impermeable passivation film of Mg into a conductive metallic oxide complex. The aqueous Mg battery shows a stable performance with an impressive voltage plateau and high Coulombic efficiency.
ACS ENERGY LETTERS
(2022)
Article
Energy & Fuels
Shijing Luo, Wending Pan, Yifei Wang, Xiaolong Zhao, Kee Wah Leong, Dennis Y. C. Leung
Summary: A gel-aided dual-electrolyte fuel cell design using cellulose paper has been proposed for the first time to overcome the low open-circuit voltage and power density issue in hydrogen peroxide fuel cells. By toning the electrolytes, the OCV of the fuel cell has been increased to 1V and a high peak power density of 10.2 mW cm(-2) has been achieved. The use of alkaline anolyte has shown to significantly benefit the cell performance. The fuel cell also exhibits great durability and can be instantly re-activated upon refueling.
Review
Energy & Fuels
Wai Szeto, Dennis Y. C. Leung
Summary: To achieve carbon neutrality in the near future, a high technology readiness level solution for sustainable mobility is required. One option is the use of biofuels in existing vehicles with internal combustion engines. This review focuses on the competitive advantage of hydrotreated vegetable oil, a second-generation biosourced fuel, over fatty acid methyl ester and fossil diesel. It covers recent works on hydrotreated vegetable oil, including spray combustion characteristics, engine performance, and emissions. The structural presentation helps readers understand the properties and performance of hydrotreated vegetable oil as a fuel in compression ignition engines. The discussion is divided into two sections based on different injection technologies and addresses the production and lubricity issues of hydrotreated vegetable oil.
Review
Chemistry, Multidisciplinary
Linhao Fan, Hao Deng, Yingguang Zhang, Qing Du, Dennis Y. C. Leung, Yun Wang, Kui Jiao
Summary: With the global commercialization of PEMFCs approaching, the challenges of cost, performance, and durability need to be addressed. Developing ultralow Pt loading PEMFCs is crucial for improving their cost competitiveness. This perspective discusses the motivation for ultralow Pt loading and presents important technical development routes. The latest advancements in catalyst layer design under low Pt loading, as well as approaches for accelerating catalyst layer development, are proposed for next-generation PEMFCs.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Xiaolong Zhao, Xiaoping Yi, Wending Pan, Yifei Wang, Shijing Luo, Yingguang Zhang, Ruijie Xie, Dennis Y. C. Leung
Summary: Oxygen element is introduced into a non-metal CN photocatalyst to enhance the activity and selectivity of the photocatalytic CO2 reduction process. The optimized sample exhibits improved charge transfer dynamics, resulting in faster and more active electron transfer and higher CO2-to-CH4 photoreduction activity compared to the CN counterpart. Additionally, the sample demonstrates excellent cyclic stability.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Ruijie Xie, Kaiheng Guo, Zhimin Ao, Ziyi Suo, Haibao Huang, D. Y. C. Leung
Summary: In this study, a Co atom anchored on Al-doped SiO2 catalyst was used for peroxymonosulfate (PMS) activation to produce surface-bound sulfate radicals (SO4 center dot-), resulting in efficient removal of pollutants within minutes. The abundant surface-bound SO4 center dot- was identified and quantified using in-situ cyclic voltammetry-electrochemical quartz crystal microbalance (CV-EQCM) technique. Co atoms provided binding sites for SO4 center dot-, leading to the enrichment of surface-bound SO4 center dot- at the nanoscale. The system exhibited outstanding performance in pollutant degradation, surpassing traditional treatments.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Wei Zhao, Mengru Yan, Xinran Yang, Xiaojun Zeng, Yantong Chen, Benlin Dai, Xiaozhong Chu, Xuekun Hong, Feihu Mu, Shijie Li, Dennis Y. C. Leung
Summary: A novel Ag/MIL-68(In)-NH2/Bi4O7 plasmonic heterojunction was successfully prepared and showed the most efficient photocatalytic performance in the degradation of amoxicillin, with 3.7 and 3.2 times higher activity than Bi4O7 and MIL-68(In)-NH2, respectively. The superior performance was attributed to the large surface area and localized surface plasmon resonance (LSPR) effect, which provided more active sites and enhanced visible light absorption. The degradation pathway of amoxicillin was also investigated using Gaussian software calculation and liquid chromatography-mass spectrometry (LC-MS) analysis. Lastly, characterizations and simulations were conducted to explain the S-scheme photocatalytic mechanism.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
X. Yi, X. Liu, B. Qin, X. Zhao, K. W. Leong, W. Pan, K. Jiang, S. Ma, Z. Hao, D. Y. C. Leung, Z. Wen
Summary: An ultrafine carbon nanotube (CNT) is developed as a cathode catalyst for solid-state lithium-oxygen batteries (SSLOBs), improving the solid-solid contact issue and providing a superior specific capacity. The amorphous discharge products formed on the CNT surface and between the CNTs and solid electrolyte particles are found to reduce cell impedance and increase reactive sites. The growth morphology of Li2O2 and the conduction paths of amorphous (Li2O2)n cluster are also determined for the first time.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Engineering, Environmental
Siyuan Zhao, Tong Liu, Yayu Zuo, Manhui Wei, Jian Wang, Zongping Shao, Dennis Y. C. Leung, Tianshou Zhao, Meng Ni
Summary: To achieve long-duration energy storage, a technological and economical battery technology is crucial. This study presents an all-around zinc-air flow battery that utilizes a decoupled acid-alkaline electrolyte to elevate the discharge voltage and a reaction modifier KI to lower the charging voltage. This battery exhibits long discharge duration, high power density, unprecedented energy efficiency, and outstanding fast charging ability, making it a promising option for long-duration energy storage and a catalyst for the development of other systems.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Mingyu Xia, Xiaolong Zhao, Ci Lin, Wending Pan, Yingguang Zhang, Zhengxiao Guo, Dennis Y. C. Leung
Summary: This study reports a morphology engineering strategy to fabricate terrace-like tungsten oxide (TW) film and evaluates its high-voltage performance as a photoanode for photoelectrochemical (PEC) water splitting. Terrace-like WO3 films show higher photoelectrochemical performance compared to porous WO3 films due to their more regular nanostructure, smaller band gap, faster charge-transfer rate, and reduced recombination rate.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Yifei Wang, Wending Pan, Kee Wah Leong, Shijing Luo, Xiaolong Zhao, Dennis Y. C. Leung
Summary: This study develops an ethanol gel electrolyte for Al-air battery, which effectively inhibits Al corrosion and improves the discharge lifetime and specific capacity of the battery.
GREEN ENERGY & ENVIRONMENT
(2023)
Article
Chemistry, Physical
Wending Pan, Yulong Zhang, Kee Wah Leong, Yingguang Zhang, Jianjun Mao, Yifei Wang, Xiaolong Zhao, Shijing Luo, D. Y. C. Leung
Summary: This study introduces 2D MoS2 as a high-performance cathode material for aqueous Al-ion batteries, achieving high voltage and energy density through anion intercalation mechanism. The battery demonstrated an impressive retention rate of approximately 100% after 200 cycles. This research not only provides insights into the development of 2D MoS2 cathode materials but also lays the foundation for advanced cathode materials in the field of Al-ion batteries.
Review
Chemistry, Physical
Mingyu Xia, Xiaolong Zhao, Yingguang Zhang, Wending Pan, Dennis Y. C. Leung
Summary: This review introduces the basic concepts of photocatalytic hydrogen production and the rational designs of heterojunction photocatalyst systems. Spatially separated reaction sites can improve catalyst charge separation efficiency and prolong the lifetime of photogenerated charges.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Chemistry, Physical
Muyan Wu, Yingguang Zhang, Haibao Huang, Dennis Y. C. Leung
Summary: This study investigates the application of CeO2 nanorods in vacuum ultraviolet (VUV) catalytic oxidation for toluene degradation. The results show that the synergistic effects of ultraviolet photocatalytic oxidation (UV-PCO) and ozone catalytic oxidation (OZCO) play a role in the removal of toluene and COx generation. However, the combination of UV-PCO and OZCO (UV-OZCO) does not improve mineralization. Furthermore, the study reveals the generation of hydroxyl radical (center dot OH) and the inhibition of superoxide radical (center dot O-2(-)) in the UV-OZCO process, leading to lower mineralization level of toluene.
GREEN ENERGY & ENVIRONMENT
(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)