英文论文


文献类型
Journal article (JA)
题名
Hollow Hemispherical Lithium Iron Silicate Synthesized by an Ascorbic Acid-Assisted Hydrothermal Method as a Cathode Material for Li Ion Batteries
作者
Li, Huaifu; Li, Yunsong; Cheng, Xuan; Gong, Chaoyang
作者单位
[Li, Huaifu; Cheng, Xuan; Gong, Chaoyang] Xiamen Univ, Coll Mat, Dept Mat Sci & Engn, Xiamen 361005, Peoples R China. [Li, Yunsong] Northwestern Polytech Univ, Sch Mat Sci & Engn, Xian 710072, Peoples R China. [Cheng, Xuan] Xiamen Univ, Fujian Key Lab Adv Mat, Xiamen 361005, Peoples R China.
通讯作者地址
Xiamen Univ, Coll Mat, Dept Mat Sci & Engn, Xiamen 361005, Peoples R China.; Northwestern Polytech Univ, Sch Mat Sci & Engn, Xian 710072, Peoples R China.; Xiamen Univ, Fujian Key Lab Adv Mat, Xiamen 361005, Peoples R China.
Email
20720171150018@stu.xmu.edu.cn; ysli@xmu.edu.cn; xcheng@xmu.edu.cn; gcy@xmu.edu.cn
ResearchID
ORCID
期刊名称
Materials
出版社
MDPI
ISSN
出版信息
May-2 2022, 15 (10)
JCR
影响因子
ISBN
基金
Natural Science Foundation of Shaanxi Province [2020JM-084]; Basic Research Plan of Taicang City [TC2019JC07]
会议名称
会议地点
会议开始日期
会议结束日期
关键词
Ascorbic acid; Cathodes; Electric discharges; Ions; Iron compounds; Lithium compounds; Silicates; Silicon
摘要
High-capacity and high-voltage cathode materials are required to meet the increasing demand for energy density in Li ion batteries. Lithium iron silicate (Li2FeSiO4) is a cathode material with a high theoretical capacity of 331 mAh center dot g(-1). However, its poor conductivity and low Li ion diffusion coefficient result in poor capability, hindering practical applications. Morphology has an important influence on the properties of materials, and nanomaterials with hollow structures are widely used in electrochemical devices. Herein, we report a novel hollow hemispherical Li2FeSiO4 synthesized by a template-free hydrothermal method with the addition of ascorbic acid. The hollow hemispherical Li2FeSiO4 consisted of finer particles with a shell thickness of about 80 nm. After carbon coating, the composite was applied as the cathode in Li ion batteries. As a result, the hollow hemispherical Li2FeSiO4/C exhibited a discharge capacity as high as 192 mAh center dot g(-1) at 0.2 C, and the average capacities were 134.5, 115.5 and 93.4 mAh center dot g(-1) at 0.5, 1 and 2 C, respectively. In addition, the capacity increased in the first few cycles and then decayed with further cycling, showing a warm-up like behavior, and after 160 cycles the capacities maintained 114.2, 101.6 and 79.3 mAh center dot g(-1) at 0.5, 1 and 2 C, respectively. Such a method of adding ascorbic acid in the hydrothermal reaction can effectively synthesize hollow hemispherical Li2FeSiO4 with the enhanced electrochemical performance.
一级学科
Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Physics, Applied; Physics, Condensed Matter
WOS入藏号
WOS:000801491600001
EI收录号
20222212165208
DOI
10.3390/ma15103545
ESI
收录于
SCIE, EI

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