Article
Electrochemistry
Prerna Vinchhi, Roma Patel, Indrajit Mukhopadhyay, Abhijit Ray, Ranjan Pati
Summary: This study investigates the impact of Sm3+ doping concentration on the grain boundary ionic conductivity of ceria. Materials were prepared using a modified co-precipitation method and sintered at high temperature to achieve highly dense pellets. Structural analyses confirmed the single phase cubic structure of samaria doped ceria (SDC) nanoparticles, and the ionic conductivity measurements showed superior grain boundary conductivity for certain compositions.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
Bharathi Bandi, Abhijit Chatterjee
Summary: The ionic conductivity of polycrystalline aliovalently-doped solid oxide electrolytes is lower than that of single-crystal material due to slow ionic movement at the grain boundary. Traditional models fail to consider the chemical interactions and atomic structure at the grain boundary. Molecular dynamics simulations reveal chemical oscillation in the space-charge region, resulting from competing chemical, electrostatic, and elastic interactions. The characteristics of the space charge layer differ in each grain boundary, and an alternative theory explaining these chemical oscillations is proposed.
Article
Chemistry, Physical
X. Y. Ping, B. Meng, W. K. Liang, Q. Zheng, C. Li
Summary: In this study, composite powders of Ce0.85Y0.15O2-delta (YDC)-xmol% aluminum compound were prepared by mixing YDC with different amounts of Al(NO3)(3) and densified through spark plasma sintering. The formation of CeAlO3 phase and reduction in grain size were observed with increasing Al(NO3)(3) addition amount. While the presence of CeAlO3 phase in A10 and A20 samples decreased the grain boundary conductivity, the evenly distributed CeAlO3 grains in A40 led to a significant increase in grain boundary conductivity.
SOLID STATE IONICS
(2021)
Article
Chemistry, Physical
Sk. Anirban, Anindita Banerjee, Abhigyan Dutta
Summary: The synthesis route significantly influenced the structure, microstructure, and ionic transport properties of Ce0.8Gd0.2O1.9 ionic conductors. The citrate auto-ignition method resulted in higher density and Gd3+ ion dissolution, while the co-precipitation method produced finer nanomaterials. Each synthesis route also impacted the ionic conductivity, dielectric constant, and grain boundary conductivity of the samples.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Inna A. Zvonareva, George N. Starostin, Mariam T. Akopian, Gennady K. Vdovin, Xian-Zhu Fu, Dmitry A. Medvedev
Summary: The search for new oxide materials with pronounced proton transport is important for efficient energy conversion processes. Y-doped barium stannates exhibit varying transport properties depending on the doping degree, with weakly doped stannates being electron conductors and heavily doped stannates showing higher ionic conductivity and wider electrolytic domain boundary, making them potential electrolytes for protonic ceramic fuel and electrolysis cells.
JOURNAL OF POWER SOURCES
(2023)
Article
Materials Science, Ceramics
Wiem Bouslama, Monaam Ben Ali, Nasr Sdiri, Habib Elhouichet
Summary: Fe doped ZnO nanocrystals synthesized from sol-gel method exhibit good crystalline quality and electrical properties, showing potential for energy storage applications.
CERAMICS INTERNATIONAL
(2021)
Article
Nanoscience & Nanotechnology
Lixiao Zhang, Yimeng Liu, Jin Han, Chao Yang, Xing Zhou, Ye Yuan, Ya You
Summary: Natrium superionic conductor (NASICON) is a promising solid-state electrolyte due to its high stability and safety. This study designs Al-doped NASICONs and provides a detailed explanation of the effects of Al doping on ionic conductivity.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Ceramics
Pinar Kaya, Y. Eren Suyolcu, Peter A. van Aken, Servet Turan, Giuliano Gregori, Joachim Maier
Summary: The addition of Yb2O3 to Sm-bearing AlN ceramics significantly reduces thermal conductivity and increases grain boundary resistivity. On the other hand, the use of Sm2O3 as a sintering aid leads to an increase in electrical resistivity due to secondary phases at grain boundaries and triple junctions.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
Mario Godinho, Murillo H. M. Rodrigues, Rosana de F. Goncalves, Roman Alvarez Roca, Elson Longo, Fabiana Villela Mota, Humberto V. Fajardo, Rosana Balzer
Summary: This study investigates the relationship between ionic conductivity and catalytic activity of ionic conductors based on gadolinium-doped ceria (GDC). Experimental results show that samples with 15% gadolinium exhibit higher catalytic activity and ionic conductivity at 400 degrees C. The study attempts to correlate conductivity and catalytic oxidation in terms of oxygen mobility, vacancies, and superoxide formation.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2021)
Article
Chemistry, Physical
Ce Wang, Zhan-Guo Liu, Fu-Gang Lu, Jin-Cheng Lin, Jiu-Jie Xu, Xin-Fei Zhang, Xin-Yue Li, Ke-Jing Hu, Pan-Pan Lin, Tie-Song Lin, Yong-Kang Dong, Peng He
Summary: A novel strategy is proposed in this work to address the grain boundary and interface problems of LLZTO electrolytes by introducing GeO2 additive. The addition of GeO2 improves the ionic conductivity and stability of the electrolyte.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Xin Xu, Connor Carr, Xinqi Chen, Benjamin D. Myers, Ruiyun Huang, Weizi Yuan, Sihyuk Choi, Dezhi Yi, Charudatta Phatak, Sossina M. Haile
Summary: This study reveals the variation in grain boundary properties of polycrystalline ionic materials and the correlation between grain boundary resistance and impurity concentration. The findings suggest that the grain boundary resistance may be caused by impurity-generated space charge effects and driven by the energetics of impurity segregation.
ADVANCED ENERGY MATERIALS
(2021)
Article
Materials Science, Ceramics
Xingbao Song, Dongliang Liao, Zhixiang Lian, Feng Chen, Kaiping Peng
Summary: In this study, 1 mol% alkali metals doped Ce0.9Gd0.1O2-δ electrolytes were prepared by citrate-nitrate sol-gel autoignition process, and the effects of alkali metals on the phase structure, micromorphology, and grain boundary conductivity were investigated. The addition of alkali metals was found to improve grain boundary conductivity, with Ce0.89Gd0.1K0.01O2-δ showing the best performance among all samples.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Leticia P. R. Moraes, Marina Machado, Lays N. Rodrigues, Ziqi Sun, Debora Marani, Fabio C. Fonseca
Summary: A novel method for synthesizing two-dimensional gadolinium-doped cerium oxide nanosheets as interdiffusion barrier layers in solid oxide fuel cells is developed. The shape of the nanosheets is controlled using a low-cost wet-chemical method, allowing for the fabrication of a dense barrier layer. The electrochemical properties of the fuel cells confirm the efficiency of the cerium oxide nanosheets in preventing the formation of resistive phases at the interface.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Ceramics
Hye-Won Kim, Jun Seo, Ji Haeng Yu, Kyong Sik Yun, Jong Hoon Joo, Jooho Moon, Hee Jung Park
Summary: The study found that barium zirconate with higher Ce substitution exhibits better conductivity in both grain and grain boundary, while low-Ce substituted samples are significantly affected by space charge in grain boundary transport. The highest conductivity was observed in the barium zirconate sample with the highest Ce substitution, showing its potential application as a solid electrolyte in electrochemical devices like solid oxide fuel cells.
CERAMICS INTERNATIONAL
(2021)
Article
Geochemistry & Geophysics
Kui Han, Xinzhuan Guo, Junfeng Zhang, Xuben Wang, Simon M. Clark
Summary: Experimental measurements of electrical conductivity do not fully match the conductivity of multiphase rocks under in-situ conditions, and research shows that ion segregation at grain boundaries significantly influences the bulk conductivity of multiphase aggregates, potentially explaining electrical conductivity anomalies in the crust.
CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
(2021)
Article
Chemistry, Applied
Meng Li, Bin Hua, Lu-Cun Wang, Zheng Zhou, Kara J. Stowers, Dong Ding
Summary: The transformation of CO2 into valuable products is an important field of research due to its impact on global warming. Single-atom alloy (SAA) catalysts have shown promising results in CO2 hydrogenation reactions. In this study, the authors used density functional theory (DFT) computations to screen Ru and 6 RuX (X = Fe, Co, Ni, Cu, Ir and Pt) SAAs as potential catalysts. The formation of specific intermediates was found to play a critical role in determining the catalysts' activities, and the doping of Co and Pt single atoms into Ru surface was found to enhance the production of methanol.
Article
Chemistry, Physical
Mingchao Su, Daoming Huan, Xueyu Hu, Kang Zhu, Ranran Peng, Changrong Xia
Summary: The study demonstrates that Ca-doped LaCoO3-delta and LaCoO3-delta oxides can effectively overcome CO2 poisoning issues, showing high electrical conductivity and thermal compatibility. Compared to LCCo, LCFe exhibits better CO2 tolerance and higher electrochemical performance.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
Yanhong Wan, Yi Yang, Yalin Lu, Ranran Peng, Changrong Xia
Summary: This study found that doping bismuth into lanthanum chromate-based perovskites can significantly enhance the electrochemical activity for CO2 reduction reaction and improve the physicochemical properties, leading to a substantial improvement in the performance of symmetrical solid oxide electrolysis cells.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Lu Zhang, Daoming Huan, Kang Zhu, Pengqi Dai, Ranran Peng, Changrong Xia
Summary: Doping of Mn in SrFeO(3-delta) perovskites can regulate their phase structure, enhance cathode performance, and improve stability in CO2 atmospheres.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Binze Zhang, Shaowei Zhang, Hairui Han, Kaibin Tang, Changrong Xia
Summary: The partial replacement of iron element with gallium in PrBaFe2O5+delta can improve its electrochemical performance as a cathode material for intermediate-temperature solid oxide fuel cells. Specifically, PrBaFe1.9Ga0.1O5+delta exhibits improved physicochemical properties and electrochemical properties, such as an increased oxygen surface exchange coefficient (kchem) and enhanced oxygen dissociation process. Moreover, the anode-supported single cell with PBFG0.1 cathode shows a higher peak power density and good stability in long-term operation.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Ceramics
Kang Zhu, Nai Shi, Lijie Zhang, Daoming Huan, Xinyu Li, Xiaoyu Zhang, Rui Song, Changrong Xia, Ranran Peng, Yalin Lu
Summary: Oxygen vacancy engineering via calcium-doping is proposed and validated to improve proton conduction in proton conducting oxides. The presence of more oxygen vacancies and the tailored position of vacancies accelerate proton diffusion and increase proton concentration. The doped compound BZCa1Y2 exhibits higher proton concentration, ionic conductivity, and proton diffusion coefficient compared to BZY2.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Binze Zhang, Shaowei Zhang, Zhen Zhang, Kaibin Tang, Changrong Xia
Summary: A highly efficient and robust metal-supported solid oxide electrolysis cell (SOEC) is developed, which exhibits redox stability, minimal ohmic loss, high conductivity, enlarged specific surface area, and enhanced CO2 adsorption property. The metal-supported SOEC with the infiltrated cathode shows excellent current densities and stability, making it a promising configuration for direct CO2 electrolysis.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Hairui Han, Xueyu Hu, Binze Zhang, Shaowei Zhang, Yanxiang Zhang, Changrong Xia
Summary: A method was proposed to determine the chemical surface exchange coefficient (k(chem)) and reveal the ORR process of porous dual-phase composites based on electrical conductivity relaxation measurements and the distribution of characteristic time (DCT) model. The method was demonstrated with porous LSCF-SDC composites, and it was found that the ORR process involved a combination of gas diffusion, surface exchange, and their interaction. The addition of SDC greatly improved k(chem) in the dual-phase composites, with the highest improvement achieved at around 10% SDC volume fraction. The method is also applicable for analyzing CO2 reduction and vapor splitting reactions in solid oxide electrolysis cells.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Engineering, Environmental
Yongtao Zhao, Shaowei Zhang, Mingchao Su, Daoming Huan, Ranran Peng, Changrong Xia
Summary: In this study, a stoichiometric CuFe2 alloy was successfully electroplated on the surface of SUS 430, forming a CuFe2O4 spinel coating through in-situ thermal oxidation. The mechanism of CuFe2 alloy electroplating was revealed using density functional theory calculations and COMSOL simulations. The dense CuFe2O4 coating effectively blocked the outward volatile Cr species and suppressed the increase in area specific resistance (ASR) in long-term testing. The practical application of CuFe2O4-coated SUS 430 showed improved durability due to mitigated chromium poisoning.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
S. Ma, B. Liao, F. Y. Qiao, D. Ding, C. Gao, Z. P. Li, R. Tong, X. Y. Kong, W. Z. Shen
Summary: This paper adopts the tube plasma-enhanced chemical vapor deposition (PECVD) technology, integrating nano SiOx(Tox) and in-situ phosphorus-doped polysilicon (n + poly-Si), to investigate the passivation and contact performance of tunnel oxide passivated contact (TOPCon) solar cells. The optimal electrical properties are confirmed through simulations, and the characterization of the rear stack passivation layers ensures their suitability for high-efficiency TOPCon solar cells. Large-sized TOPCon solar cells with average efficiency of 24.5% and maximum efficiency of 24.7% are fabricated, demonstrating the potential of the tube PECVD technology for mass production in the industry.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Chemistry, Applied
Xiaoye Liu, Xiangkun Kong, Wenyi Xiang, Yining Jiang, Bingqinq Xiong, Weiwei Ping, Changrong Xia, Daoming Huan, Chengwei Wang
Summary: In this study, a new garnet-type composite solid-state electrolyte (LLBZNO-LCO) was proposed to improve the chemical stability and electrochemical properties of garnet with high-temperature processing. The addition of a small amount of LCO significantly decreased the interface resistance and reduced the sintering temperature of garnet-type LLBZNO. The all-solid-state battery based on the sintered LLBZNO-LCO SSE showed excellent cycling stability. This approach provides a new strategy for optimizing the comprehensive performance of garnet SSE.
JOURNAL OF ENERGY CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Xinyu Li, Zemin Chen, Daoming Huan, Bingbing Qiu, Kang Zhu, Zeming Qi, Hengjie Liu, Changrong Xia, Ranran Peng, Yalin Lu
Summary: This study demonstrates the successful modification of proton-conducting solid oxide fuel cell (PCFC) cathode surfaces using boron (B), leading to improved CO2 resistance and surface electrocatalytic activity for proton-involved oxygen reduction reaction (P-ORR). The introduction of B raises the surface Bronsted acid (-OH) concentration while suppressing the surface Lewis acidity, ultimately enhancing the power density of the PCFC.
ACS MATERIALS LETTERS
(2023)
Article
Chemistry, Physical
Lujuan Ye, Kang Zhu, Yunan Jiang, Shaowei Zhang, Ranran Peng, Changrong Xia
Summary: Solid oxide electrolysis cells (SOECs) can efficiently convert CO2 into valuable chemicals. Ceria with exsolved Fe nanoparticles on its surface shows enhanced electrochemical performance for CO2 reduction reaction (CO2RR).
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Hairui Han, Yunan Jiang, Shaowei Zhang, Changrong Xia
Summary: This perspective paper estimates the possible physiochemical processes for the oxygen reduction reaction (ORR) in porous mixed ionic-electronic conductors (MIECs) by comparing the oxygen supply/consumption fluxes through calculation. It also discusses the potential problems associated with different characterization techniques and reveals the significant delay in the ORR process caused by gas diffusion. The aim of this paper is to recommend a reasonable method to characterize the true ORR kinetics of porous electrodes and quantify the effect of gas diffusion.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Yunan Jiang, Lujuan Ye, Shaowei Zhang, Changrong Xia
Summary: Fe-exsolved ceria is a highly efficient cathode for CO2 electrolysis in SOEC, where dopant Fe is partially reduced to dispersed Fe-0 nanoparticles, greatly enhancing the catalytic activity for CO2 reduction. At 700 degrees C, the cathode polarization resistance is 0.57 omega cm(2), and the chemical surface exchange coefficient for CO2 reduction is 1.68 x 10(-3) cm s(-1), outperforming metal-exsolved perovskite cathodes at 800 degrees C.
JOURNAL OF MATERIALS CHEMISTRY A
(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)
