Article
Chemistry, Multidisciplinary
X. Dong, L. Dou, A. Tang, P. Hu, Z. Zhang, C. Shang
Summary: In this research, thiophene was added to the traditional electrolyte to electrochemically polymerize elastic conductive polythiophene (PTh) on the surface of NCM811, stabilizing the interface and inhibiting electrolyte corrosion. As a result, the PTh-modified NCM811 exhibited improved cycling stability with 94% capacity retention after 200 cycles at 2 C and considerable rate capability with a high specific capacity of 171.7 mAh/g at 5 C. This study provides an effective and feasible method to utilize conductive polymers as elastic protective layers for electrode materials.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Chemistry, Physical
Yuhui Zhao, Yingqing Bao, Wei Zhang, Mingyun Guan, Yan Zhuang
Summary: In this study, Ti4+ and V5+ are doped into NCM811 to enhance its electrochemical properties. The bimetal-doped material shows a capacity retention of 66.7% after 500 cycles, a 30% improvement compared to the original NCM811. The rate performance at 5C is also improved from 53.4% to 58%. XRD analysis reveals that the lattice parameters increase after Ti4+ and V5+ doping. Cyclic voltammetry demonstrates that the doping enhances the diffusion rate of lithium ions. Furthermore, the co-doping of Ti4+ and V5+ improves the reversibility of the H-2↔H-3 phase and stabilizes the material's structure, as observed from the dQ/dV curves. FIB-SEM imaging shows that the sintered primary particles become elongated and arranged in a radiating manner after Ti4+ and V5+ doping, which alleviates local stress accumulation and reduces micro-cracks. Overall, Ti4+ and V5+ co-doping enhances the electrochemical performance of LiNi(0.)8Co(0.1)Mn(0.1)O(2).
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
Zhaozhe Yu, Qilin Tong, Guiquan Zhao, Guisheng Zhu, Bingbing Tian, Yan Cheng
Summary: A conductive network constructed by employing a holistic Ge coating can improve the structural reversibility and conductivity of Mg-doped NCM811 particles, minimizing the irreversible loss of NCM811 during long cycling.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Ceramics
Yulei Sui, Yueying Hao, Xiaoping Zhang, Jiangpeng Li, Gongyu Wen, Shengkui Zhong, Ziwei Zhang, Ling Wu
Summary: This study successfully synthesized V-substituted Na0.67Fe0.5Mn0.5O2 cathode material with improved electrochemical performance, and investigated the effects of V-substitution on its chemical composition, crystal structure and morphology, as well as the modification mechanisms on the enhanced electrochemical properties. The results showed that introducing V ions into the lattice of Na0.67Fe0.5Mn0.5O2 crystals significantly improved its rate capability and cycle stability, mainly due to the enhanced Na+ diffusion rate and structural reversibility.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Jingjing Cai, Zhi Su, Weigang Fan
Summary: The triclinic LiVOPO4/C composites prepared by a combined sol-gel-microwave process exhibit small particle size, covered with a carbon layer, and provide initial capacity of 123.2 mAh.g(-1), stabilizing at 120.2 mAh.g(-1) after 50 cycles.
Article
Chemistry, Physical
Bin Hu, Jiaqi Peng, Dongming Liu, Mingli Wu, Yuanyuan Wei, Bin Huang, Yanwei Li, Shunhua Xiao, Renheng Wang
Summary: The synergistic effect of single crystal, element doping, and surface coating can effectively improve the electrochemical performance of the high-nickel ternary cathode material LiNi0.83Co0.11Mn0.06O2 (NCM811), including increasing lithium-ion diffusion rate and cycle stability.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Haolong Nie, Chaoqun Shang, Pu Hu, Yajie Li
Summary: In this study, a conductive polypyrrole (PPy) layer was introduced on the surface of Ni-rich LiNi0.8Co0.1Mn0.1O2 cathode material (NCM811@PPy) through in-situ polymerization. The modified cathode showed improved electrochemical performance with higher reversible capacity (175.3 mA h g(-1)) and capacity retention (90.7 %) after 100 cycles. This work provides an efficient approach to enhance the Ni-rich cathode for high-energy batteries.
Article
Materials Science, Multidisciplinary
Zexun Tang, Hongqi Ye, Xin Ma, Kai Han
Summary: This study systematically investigated the structure, morphology, and electrochemical performance of LiNi0.8Co0.1Mn0.1O2 secondary particles and single crystals. The single crystals exhibited better stability at higher temperatures and a wider electrochemical window.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2022)
Article
Energy & Fuels
Sidra Bibi, Azim Khan, Safia Khan, Awais Ahmad, Syed Sakhawat Shah, Mohammad Siddiq, Azhar Iqbal, Abdullah A. Al-Kahtani
Summary: The study on lithium manganese phosphate with different chromium contents revealed that the dielectric constant increases with frequency at low chromium concentrations, while it decreases with frequency at higher chromium contents. The material with the highest chromium content showed the lowest AC conductivity and dielectric loss, making it suitable for various applications.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Chemistry, Physical
Xiaoxiao Lu, Qinzhong Mao, Yinfeng Wang, Tongzong Ji, Yunhui Zeng, Yuankang Xu, Yang Xia, RuiHao Shan, Panpan Xu, Yurong Cai, Juming Yao
Summary: In this study, LZO coatings were prepared via a sol-gel route, and the chemical compositions and amounts of Zr4+ doping were studied with varying Li/Zr molar ratios. It was found that the best electrochemical performance was achieved for the NCM811-LZO2.4, due to moderate Zr4+ doping and the multiphase LZO coating reducing the surface residue lithium and enhancing the transport rate of charge carriers.
SURFACES AND INTERFACES
(2023)
Review
Materials Science, Multidisciplinary
Xiao-Feng Zhu, Xiu Li, Tian-Quan Liang, Xin-Hua Liu, Jian-Min Ma
Summary: This review introduces the research progress on electrolyte modifications for LIBs with NCM811 cathode materials and discusses how they control the interface stability. Recommendations for further improvement of electrolyte stability and NCM811 electrochemical properties are summarized, proposing new design rules for high performance NCM811 cathode-based LIBs.
Article
Chemistry, Physical
Semih Engun, Kamil Burak Dermenci, Umut Savaci, Cemal Can Erdogan, Servet Turan
Summary: The LiNi0.5Mn0.3Co0.2O2 (NMC532) cathode surface was coated with LLZO using the citric acid-aided sol-gel technique. A thin coating layer was obtained and the formation of LaMO3 was observed during high-temperature annealing. The electrochemical performance of the coated samples was improved, with higher capacity retention and lower interface resistance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Siqi Cheng, Wenna Li, Shunhua Xiao, Shuai Zheng, Zhuo Chen, Lizhen Hu, Qing Zhu, Bin Huang, Qingquan Liu, Quanqi Chen
Summary: The calcination temperature significantly affects the physical and electrochemical performance of Na4MnV(PO4)(3)/C composites. The surface area, carbon disorder, Na+ diffusion coefficients, and electrochemical performance are greatly influenced by the calcination temperature. Additionally, the optimal calcination temperature for the composites is found to be 750 degrees C, resulting in the highest capacity, best rate capability, and cyclability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Zengsheng Liu, Lingjun Li, Jie Chen, Huiping Yang, Lingfeng Xia, Jiaxin Chen, Junfei Duan, Zhaoyong Chen
Summary: The synthesis of layered cathode material for sodium ion batteries using sol-gel method is hindered by unclear selection criteria for complexing agents. In this study, Na0.9Ni0.45Mn0.55O2 cathode is successfully prepared using different chelating agents, with citric acid showing the best electrochemical performance. The XRD and HRTEM analysis confirm that the optimized sample maintains better phase and interfacial stability, making it significant for understanding the selection criteria for cathode chelators in sodium-ion batteries synthesis.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Electrochemistry
Lintao Dou, Ao Tang, Weiguang Lin, Xin Dong, Lu Lu, Chaoqun Shang, Zhanhui Zhang, Zhiliang Huang, Katerina Aifantis, Pu Hu, Dongdong Xiao
Summary: In this study, amorphous Nb2O5 was applied as a protective layer on the NCM811 cathode to stabilize the interface with the electrolyte, reducing contamination and corrosion. The coated NCM811 exhibited improved cycling performance and rate capacity compared to the uncoated samples.
ELECTROCHIMICA ACTA
(2022)
Article
Electrochemistry
Wenhai Tan, Youfeng Zhang, Yichen Zhang, Yanbo Ma, Chao Zhao, Yinling Wang
Summary: This study synthesized Co3O4/CC cathode materials with excellent performance for aqueous zinc-ion batteries by varying the reactant concentration. The Co3O4/CC nanowires exhibited uniform distribution, regular surface, and small size on the carbon cloth. The battery assembled with Co3O4/CC material synthesized at a reactant concentration ratio of 2:1 showed better performance, with high discharge specific capacity and capacity retention rate.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2024)
Article
Electrochemistry
T. Salahuddin, Iqra Kousar, Mair Khan, M. Munawwar Iqbal Ch
Summary: This paper investigates the dynamics of fluid motion powered by cilia within a curved channel and examines the chemical reactions occurring in the presence of electro-osmotic impact. The findings offer insights into various flow characteristics and present a method for simulating non-Newtonian fluid models in three dimensions. Additionally, the model has potential applications in the development of micro-vascular chips, which could be crucial for diagnosing blood-related issues.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2024)
Review
Electrochemistry
Ahmed Abou-Shady
Summary: Soil electrokinetic (SEK) is a significant technology with various applications in fields such as soil remediation, pollutant removal, and water regulation. This review summarizes the recent advancements in SEK, focusing on electrode modifications and material additives, and suggests future research directions.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2024)
