Synthesis of Sub-micrometer Lithium Iron Phosphate Particles Using
Supercritical Hydrothermal Method for Lithium Ion Batteries

doi:10.1007/s12204-012-1317-6

上海交通大学学报（英文版） ›› 2012, Vol. 17 ›› Issue (5): 517-522.doi: 10.1007/s12204-012-1317-6

Synthesis of Sub-micrometer Lithium Iron Phosphate Particles Using Supercritical Hydrothermal Method for Lithium Ion Batteries

LIU Xue-wu1,2*(刘学武), WEI Hao1 (魏浩), DENG Yuan-fu2 (邓远富), TANG Jie1 (汤洁), SHI Zhi-cong2 (施志聪), CHEN Guo-hua2,3 (陈国华)

(1. School of Chemical Machinery, Dalian University of Technology, Dalian 116024, Liaoning, China; 2. Center for Green Products and Processing Technologies, Guangzhou HKUST Fok Ying Tung Research Institute, Guangzhou 511458, China; 3. Department of Chemical and Biomolecular Engineering, The Hong Kong University of Science and Technology, Hong Kong, China)

出版日期:2012-10-30 发布日期:2012-11-16
通讯作者: LIU Xue-wu1,2*(刘学武) E-mail:liuxuewu@dlut.edu.cn

Synthesis of Sub-micrometer Lithium Iron Phosphate Particles Using Supercritical Hydrothermal Method for Lithium Ion Batteries

LIU Xue-wu1,2*(刘学武), WEI Hao1 (魏浩), DENG Yuan-fu2 (邓远富), TANG Jie1 (汤洁), SHI Zhi-cong2 (施志聪), CHEN Guo-hua2,3 (陈国华)

(1. School of Chemical Machinery, Dalian University of Technology, Dalian 116024, Liaoning, China; 2. Center for Green Products and Processing Technologies, Guangzhou HKUST Fok Ying Tung Research Institute, Guangzhou 511458, China; 3. Department of Chemical and Biomolecular Engineering, The Hong Kong University of Science and Technology, Hong Kong, China)

Online:2012-10-30 Published:2012-11-16
Contact: LIU Xue-wu1,2*(刘学武) E-mail:liuxuewu@dlut.edu.cn

摘要/Abstract

摘要： In this study, sub-micrometer LiFePO4 particles with high purity and crystallinity were synthesized using supercritical hydrothermal method as the cathode material for lithium ion batteries. Experimental results show that templates and calcination time have significant impacts on the purity, particle size and morphology of LiFePO4 particles. The as-prepared LiFePO4 particles using polyvinyl pyrrolidone (PVP) template with additional one hour calcination at 700℃ exhibit characteristics of good crystallinity, uniform size distribution, high capacity and cycling performance. The specific discharge capacities of 141.2 and 114.0mA· h/g were obtained at the charge/discharge rates of 0.1 and 1.0 C, respectively. It retained 96.0% of an initial capacity after 100 cycles at 1.0 C rate. The good electrochemical performance of the as-synthesized material is attributed to the synergistic factors of its reasonable particle size and surface areas and high crystallinity.

关键词: LiFePO4, sub-micrometer, supercritical hydrothermal synthesis, template

Abstract: In this study, sub-micrometer LiFePO4 particles with high purity and crystallinity were synthesized using supercritical hydrothermal method as the cathode material for lithium ion batteries. Experimental results show that templates and calcination time have significant impacts on the purity, particle size and morphology of LiFePO4 particles. The as-prepared LiFePO4 particles using polyvinyl pyrrolidone (PVP) template with additional one hour calcination at 700℃ exhibit characteristics of good crystallinity, uniform size distribution, high capacity and cycling performance. The specific discharge capacities of 141.2 and 114.0mA· h/g were obtained at the charge/discharge rates of 0.1 and 1.0 C, respectively. It retained 96.0% of an initial capacity after 100 cycles at 1.0 C rate. The good electrochemical performance of the as-synthesized material is attributed to the synergistic factors of its reasonable particle size and surface areas and high crystallinity.

Key words: LiFePO4, sub-micrometer, supercritical hydrothermal synthesis, template

中图分类号:

TM 911

LIU Xue-wu1,2*(刘学武), WEI Hao1 (魏浩), DENG Yuan-fu2 (邓远富), TANG Jie1 (汤洁), SHI Zhi. Synthesis of Sub-micrometer Lithium Iron Phosphate Particles Using Supercritical Hydrothermal Method for Lithium Ion Batteries[J]. 上海交通大学学报（英文版）, 2012, 17(5): 517-522.

LIU Xue-wu1,2*(刘学武), WEI Hao1 (魏浩), DENG Yuan-fu2 (邓远富), TANG Jie1 (汤洁), SHI Zhi-cong2 (施志聪), CHEN Guo-hua2,3 (陈国华). Synthesis of Sub-micrometer Lithium Iron Phosphate Particles Using Supercritical Hydrothermal Method for Lithium Ion Batteries[J]. Journal of shanghai Jiaotong University (Science), 2012, 17(5): 517-522.

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Synthesis of Sub-micrometer Lithium Iron Phosphate Particles Using Supercritical Hydrothermal Method for Lithium Ion Batteries

Synthesis of Sub-micrometer Lithium Iron Phosphate Particles Using Supercritical Hydrothermal Method for Lithium Ion Batteries

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