Article
Engineering, Electrical & Electronic
Serdar Altin, Abdurrahman Yolun
Summary: Heteroatoms-substituted LiFePO4 samples showed improved battery performance compared to the undoped samples, indicating potential for commercial battery applications.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Multidisciplinary
Can Wang, Xunlong Yuan, Huiyun Tan, Shuofeng Jian, Ziting Ma, Junjie Zhao, Xuewen Wang, Dapeng Chen, Yifan Dong
Summary: LiFePO4 as a cathode material for lithium-ion batteries shows great potential with high theoretical capacity and safety features. However, its future development is limited by low conductivity and diffusion rate. By utilizing a three-dimensional carbon-coated structure, LiFePO4 can achieve higher capacity, enhanced conductivity, and faster electron transport channels without the need for additional carbon sources during synthesis.
Article
Chemistry, Physical
Yuqing Qiao, Ying Liu, Jianguo Zhu, Peng Jia, Liqiao Zhang, Wei Zhou, Tifeng Jiao
Summary: In this study, micro/nano-structured LiFePO4 electrode materials with grape-like morphology were successfully prepared via a solvothermal approach, showing high discharge capacity at low temperatures. The findings provide valuable insights for the development of micro/nano-structured electrode materials with improved electrochemical performance under low temperature conditions.
Article
Chemistry, Physical
Asuman Celik-Kucuk, Takeshi Abe
Summary: Poly(methyl(2-(tris(2-H methoxyethoxy)silyl)ethyl)siloxane)) modified with Si-tripodant centers (2550EO) and integrated amide salt (LiF(SO2CF3)2 (LiTFSI)) has been used as a binding agent in lithium-ion batteries containing LiFePO4 (LFP). The performance of the LFP cathode using 2550EO/LiTFSI as a binder was evaluated through various tests. Comparisons were made with alternative binders such as PVDF, PEO, and 2550EO at different temperatures. The use of 2550EO/LiTFSI as a binder significantly improved the rate capability and cycle stability of the LFP cathode due to the formation of a thin solid-electrolyte interface (SEI), uniform dispersion of materials, and enhanced adhesion to the current collector.
JOURNAL OF POWER SOURCES
(2023)
Article
Nanoscience & Nanotechnology
Hongxiang Ji, Ronghan Qiao, Hailong Yu, Shan Wang, Zhongzhu Liu, Robson Monteiro, Rogerio Ribas, Yongming Zhu, Liubin Ben, Xuejie Huang
Summary: The morphology of LiNiO2 cathode material was engineered using a small amount of Nb2O5 during the electrolysis synthesis of Ni(OH)(2) precursor, resulting in improved electrochemical performance. The engineered LNO cathode material exhibited increased mechanical strength and electrical contact, and reduced the H2-H3 phase transition effects.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Chemical
Haohua Yang, Mingchuan Shao, Wei Zhang, Yanmin Lu, Zhen Xu, Libin Liu, Ligang Gai
Summary: In this study, a simple method for scalable fabrication of polythiophene-coated LiMn2O4 (LMO/PTh) through chemical vapor deposition approach is reported. Thiophene can be oxidized by surface Mn4+ ions of LMO, resulting in in situ PTh formation upon LMO particles. The resulting composites exhibit improved aging resistance and electrochemical performance attributed to the PTh coating as a moisture-buffering layer and HF absorber in the electrolyte.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Materials Science, Multidisciplinary
X. Nie, J. Xiong
Summary: The LiMn0.1Fe0.9PO4/C composite with enhanced electrochemical performance through Mn doping exhibits improved initial discharge capacities, attributed to the columnar effect of the Mn-stabilized crystal structure and increased lithium-ion diffusion rate caused by Mn doping.
Review
Chemistry, Physical
Zhaojin Li, Jinxing Yang, Tianjia Guang, Bingbing Fan, Kongjun Zhu, Xiaohui Wang
Summary: This paper summarizes the recent progress in controlled hydrothermal/solvothermal synthesis of LiFePO4 and explores the relationship between the synthesis conditions and the nucleation-and-growth of LiFePO4. The review covers surface decoration, lattice substitution, and defect control, while also discussing new research directions and future trends in the field.
Article
Nanoscience & Nanotechnology
Jing Geng, Zhengguang Zou, Tianxing Wang, Shuchao Zhang, Wenqin Ling, Xiaoxiao Peng, Fangan Liang
Summary: In an era of rapid industrial development, lithium-ion batteries are becoming increasingly important for energy storage due to their high safety and low cost. However, the preparation of advanced cathodes with stable structures and fast Li+ diffusion remains a challenge. This study focuses on improving the conductivity of lithium iron phosphate (LFP) by compounding it with defect-modified V2O5 to prepare LFP/V/C materials, which exhibit excellent electrochemical properties. Experimental results show an initial capacity of 138.85 mAh g(-1) and 95% capacity retention after 500 charge/discharge cycles at a current density of 5 C. Density functional theory (DFT) calculations are used to discuss the effect of defects on ionic diffusion, confirming the importance of introducing hybrid conductive layers for improved electrochemical performance.
Article
Materials Science, Ceramics
Raul Manuel Ugalde-Vazquez, Fabian Ambriz-Vargas, Francisco Morales-Morales, Natiely Hernandez-Sebastian, Alfredo Benitez-Lara, Roman Cabrera-Sierra, Carlos Gomez-Yanez
Summary: This study presents the optimization of sputtering deposition parameters for the development of solid-state lithium batteries. The results show that argon deposition pressure modulates the degree of re-sputtering effects, with high pressure leading to deficiencies of oxygen and phosphor in the films and low pressure promoting the growth of stoichiometric films with enhanced electrochemical activity.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Physical
Yong Wang, Jingpeng Zhang, Shiyu Tian, Juanjuan Xue, Lizhi Wen, Guangchuan Liang
Summary: This study reported a novel method for synthesizing uniform carbon-coated LiFePO4/C with PAM composite micro-spherical ferrous phosphate. The addition of PAM effectively controlled the particle size of ferrous phosphate, leading to improved conductivity and excellent electrochemical performance. The study also investigated the initial charge and discharge capacity of synthesized LiFePO4 with different PAM addition amounts.
Article
Engineering, Electrical & Electronic
Ezgi Gultek, Sebahat Altundag, Serdar Altin, Emine Altin
Summary: In this study, LiFe1-xPbxPO4 (x = 0-0.12) powders were successfully synthesized by solid-state technique. The main phase of the samples is LiFePO4 with minor impurity phases of PbO and Fe2O3. Increasing Pb-content leads to a decrease in resistance and an increase in redox peak wideness, while maintaining good cycling stability. The results suggest that doping has a positive effect on improving the performance of LiFePO4 cells.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Multidisciplinary
Yining Ma, Rui Shu, Tongxiang Xu, Jing Li, Dandan Zhu, Xiaodong Jin, Mingchen Wu, Xun Cao
Summary: (NH4)(2)V7O16 hierarchical structures were synthesized by self-assembly of nanoflakes using a one-step rotating hydrothermal method. These structures showed good rate capability and cyclic stability when used as anodic materials for aqueous Li-ion batteries. The structural evolution of the material during cycling was also investigated using ex situ XRD.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Chemistry, Physical
Di Huang, Xiaoliang Zhou, Limin Liu, Huangmin Li, Gang Lin, Jie Li, Zhaohuan Wei
Summary: The development of aqueous zinc-ion batteries (AZIBs) with high capacity and cycling stability is of great interest. In this study, a novel modification technology is developed by spraying a Ketjen black (KB) conductive carbon layer on the side of the cathode, resulting in improved capacity and cycle stability of AZIBs. The KB separator reduces charge transfer impedance and improves ion diffusion coefficient, contributing to excellent electro-chemical kinetics. Additionally, the unique adsorption properties of the KB separator reduce attachment of by-products on the cathode surface and electro-oxidize Mn2+ ions to generate electrochemically active layered birnessite, leading to stable electrochemical performance and improved battery capacity.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Physical
Zi-Liang Chen, Yi-Jing Gu, Gui-Yang Luo, Yong-Lin Huo, Fu-Zhong Wu
Summary: The study investigated the simultaneous synthesis of LiFePO4/C and sulfur-modified reduced graphene oxide (SG) through a one-step hydrothermal method. It was found that SG significantly improved the electrochemical performance of the samples, with sample S2 showing the best specific discharge capacity and stability. The results indicate that wrapping LiFePO4/C with SG contributes to enhancing its electrochemical performance.
