Article
Chemistry, Physical
Nali Li, Yanwei Tong, Dawei Yi, Xumei Cui, Xuefeng Zhang
Summary: Monoclinic Li3V2-xZrx(PO4)(3)/C composites with different Zr4+ doping amounts were prepared by a sol-gel combustion technique. Zr4+ doping led to an expansion in lattice volume, improved morphological characteristics, reduced resistances, and enhanced electrochemical performance. Optimal doping level of Zr4+ was found to be x = 0.05, resulting in the highest tap density and excellent electrochemical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Thermodynamics
A. Fly, I Kirkpatrick, R. Chen
Summary: The performance of electrochemical energy storage technologies is strongly affected by temperature, with lithium-ion batteries showing the highest energy and power densities down to -30°C. Lead-acid cells provide the highest energy density and supercapacitors offer the highest power density at lower temperatures. A new simplified empirical method for lithium-ion cells to determine the optimum pre-heating temperature for maximum net energy output is introduced.
APPLIED THERMAL ENGINEERING
(2021)
Article
Chemistry, Physical
Xiaoying Luo, Xuexia Wei, Cunhao Zhang, Jiaqi Huang, Xuan Cheng
Summary: Surface, interface, and microstructure studies were conducted on a modified carbon-coated lithium iron silicate composite with 15% vanadium modification to understand its enhanced electrochemical performance. The study confirmed the presence of amorphous carbon coating on the composite surface and a change in the predominant crystal phase after vanadium modification. Multi-peak fitting analysis of X-ray photoelectron spectroscopy spectra identified the simultaneous presence of multivalent iron and vanadium ions. The detailed characterization of microstructure, interface, and surface provided strong evidence for the partial substitution of divalent iron with divalent vanadium and the surface modification by vanadium, resulting in increased total carbon content and improved charge transfer kinetics.
SURFACES AND INTERFACES
(2022)
Article
Chemistry, Physical
Shijie Jiang, Shan Wang, Yunjiao Li, Shuaipeng Hao, Xiaoming Xi, Shuaiwei Liu, Yike Xiong, Junchao Zheng, Panpan Zhang
Summary: This study demonstrates that Gd modification can effectively improve the electrochemical performance of LiMn2O4 at high temperature by decreasing the lattice parameters, strengthening the stability of Mn-O bonds, and forming a Gd2O3 coating layer. This results in improved capacity stability and reduced interfacial impedance.
MATERIALS TODAY ENERGY
(2022)
Article
Electrochemistry
Tao Xu, Fanghui Du, Ling Wu, Zhongxu Fan, Lina Shen, Junwei Zheng
Summary: The addition of a small amount of manganese can greatly stabilize the crystal structure and integrity of the secondary particles of LiNiO2 material, resulting in excellent electrochemical cycling performance and thermal stability. However, a high content of manganese doping can deteriorate the rate performance of the material, emphasizing the importance of optimizing the amount of doping.
ELECTROCHIMICA ACTA
(2022)
Article
Energy & Fuels
Shuangxi Shao, Boya Liu, Man Zhang, Jinling Yin, Yinyi Gao, Ke Ye, Jun Yan, Guiling Wang, Kai Zhu, Dianxue Cao
Summary: LiVO3 prepared by the combustion method demonstrates excellent electrochemical performance as an anode material for rechargeable lithium-ion batteries. The full vanadium-based cell utilizing LiVO3 as an anode and Li3V2(PO4)(3) as a cathode shows stable cycling performance and good rate ability.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Chemistry, Physical
Jun Hui Jeong, Min O. Ju, Kwang Chul Roh
Summary: In this study, the correlation between lithium-ion accessibility and low-temperature electrochemical properties of electrode materials was systematically investigated. Increasing the density of in-plane defects in holey graphene improved the electrochemical performance of Li4Ti5O12/holey graphene composites at low temperatures. The results suggest that improving lithium-ion accessibility to the electrolyte-active material interface is crucial for enhancing electrochemical properties at low operating temperatures.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Environmental
Shuai Liu, Fei Peng, Yilin Lin, Wenjun Zhou, Weiwei Huang
Summary: A polar molecule C3Q, derived from a poly-carbonyl active sites material calix[4]quinone, was used as a cathode material in lithium-ion batteries. It transforms into C3Q-Li during the initial discharge, which exhibits low solubility in the electrolyte and provides better stability to the electrode. The LIBs with C3Q-Li showed excellent cycling ability and rate performance.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Electrochemistry
Shuaiwei Liu, Shenghong Chang, Yunjiao Li, Dianwei Zhang, Jiachao Yang, Zhouliang Tan, Xugang Ren, Yike Xiong, Shan Wang, Zhenjiang He
Summary: In this study, a multi-functional modification approach using monosodium phosphate was reported to enhance the electrochemical properties of LiNi0.8Co0.1Mn0.1O2 cathode materials. The approach effectively decreased unwanted residual lithium compounds and enhanced surface stability by converting residual lithium compounds into Li3PO4. This modification strategy improved structure stability, reversibility, and capacity retention of the materials, showing promise for advanced cathode material development.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
Zhi-kun Zhao, Hui-lin Xie, Zi-yue Wen, Ling Liu, Bo-rong Wu, Shi Chen, Dao-bin Mu, Chao-xiang Xie
Summary: Decorating nickel-rich LiNi0.6Co0.2Mn0.2O2 cathode material with stable and conductive Li3PO4 can significantly improve the electrochemical performance, with 2wt% coating showing the best results among different concentrations. In-situ X-ray diffraction analysis further confirms the protective effect of the modification on the cathode structure under high voltages.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2021)
Article
Materials Science, Ceramics
Lixiang Yu, Jiajia Huang, Yihang Li, Yifu Jing, Kristina Maliutina, Rui Ma, Liangdong Fan
Summary: In this study, low temperature solid oxide fuel cells (SOFCs) utilizing ceria-carbonate composite electrolytes and lithiated transition metal oxide symmetric electrodes were assembled and tested with syngas fuel at temperatures below 650 degrees C, showing stable and efficient performance. The composite electrode displayed moderate polarization resistance towards CH4 and CO oxidation, with electrochemical performance correlated to the microstructure of the ceria-carbonate electrolyte. Interestingly, a higher concentration of methane was obtained after the fuel cell reaction, suggesting a potential approach for power and chemical co-generation within such a SOFC reactor. The symmetric electrode exhibited high resistance to carbon deposition, possibly due to its alkaline nature.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Jing Liu, Shan Gao, Zheng Si, Baozhao Shi, Huimin Li, Jinli Zhang, Wei Li
Summary: The addition of a lanthanum oxyfluoride (LaOF) coating layer on the cathode material improves the electrochemical performance and cycling stability of lithium-ion batteries.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Yiming Zhang, Shaojie Zhang, Yu Cao, Huili Wang, Jiantong Sun, Cheng Liu, Xinpeng Han, Shuo Liu, Zhanxu Yang, Jie Sun
Summary: Phosphorus anode shows promise for high-energy-density lithium-ion batteries, with recent studies identifying soluble lithium polyphosphides as responsible for capacity decay. A simple separator modification strategy involving a CNT-modified layer has been proposed to improve the performance of the phosphorus anode, leading to higher specific capacity and cycling performance without the need for complex electrode structure design.
Article
Electrochemistry
Ji-Hwan Kim, Yo-Seob Kim, Sang-Hyun Moon, Deok-Hye Park, Min-Cheol Kim, Jin-Hyeok Choi, Jae-Hoon Shin, Kyung-Won Park
Summary: This study synthesized micro spherical V2O3 anode samples using a facile solvothermal method and heating process, and successfully prepared V2O3/C composite samples showing enhanced electrochemical performance compared to commercial samples, including higher rate performance, cycling properties, and retention rate.
ELECTROCHIMICA ACTA
(2021)
Article
Metallurgy & Metallurgical Engineering
Shu-zhen Yang, Yan-fang Huang, Xue-chun Han, Gui-hong Han
Summary: The study showed that the addition of humic acid as a modifier in SnO2 anode preparation significantly improved the dispersion uniformity of particles, increased the deformation resistance of the electrode, and led to a significant progress in electrochemical performance.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2021)
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)