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

doi:10.1016/S1004-9541(14)60051-3

Chinese Journal of Chemical Engineering ›› 2014, Vol. 22 ›› Issue (2): 234-237.DOI: 10.1016/S1004-9541(14)60051-3

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

张艳洁¹, 杨艳芳¹, 王学勇², 李帅三¹

1 Mudanjiang Medical University, Mudanjiang 157011, China;
2 The 209th Hospital of People's Liberation Army, Mudanjiang 157011, China

收稿日期:2012-08-22 修回日期:2013-02-05 出版日期:2014-02-05 发布日期:2014-01-28
通讯作者: ZHANG Yanjie

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

ZHANG Yanjie¹, YANG Yanfang¹, WANG Xueyong², LI Shuaisan¹

1 Mudanjiang Medical University, Mudanjiang 157011, China;
2 The 209th Hospital of People's Liberation Army, Mudanjiang 157011, China

Received:2012-08-22 Revised:2013-02-05 Online:2014-02-05 Published:2014-01-28
Contact: ZHANG Yanjie

摘要/Abstract

摘要： A supercritical hydrothermal method was employed to prepare sub-micrometer LiFePO₄ particles with high purity and crystallinity. The structure and morphology of LiFePO₄ particles were characterized by X-ray diffraction and scanning electron microscope. The electrochemical tests were carried out to determine the reversible capacity, rate and cycling performance of the LiFePO₄ particles as cathode material for lithium ion battery. Experimental results show that solvent and calcining time have significant effects on purity, size and morphology of LiFePO₄ particles. Mixed solvent contained deionized water and ethanol is conducive to synthesize smaller and more uniform particles. The size of LiFePO₄ particles as-prepared is about 100-300 nm. The specific discharge capacities of the LiFePO₄ particles are 151.3 and 128.0 mA·h·g^-1 after first cycle at the rates of 0.1 and 1.0 C, respectively. It retains 95.0% of the initial capacity after 100 cycles at 1.0 C.

关键词: LiFePO₄, supercritical hydrothermal synthesis, lithium iron

Abstract: A supercritical hydrothermal method was employed to prepare sub-micrometer LiFePO₄ particles with high purity and crystallinity. The structure and morphology of LiFePO₄ particles were characterized by X-ray diffraction and scanning electron microscope. The electrochemical tests were carried out to determine the reversible capacity, rate and cycling performance of the LiFePO₄ particles as cathode material for lithium ion battery. Experimental results show that solvent and calcining time have significant effects on purity, size and morphology of LiFePO₄ particles. Mixed solvent contained deionized water and ethanol is conducive to synthesize smaller and more uniform particles. The size of LiFePO₄ particles as-prepared is about 100-300 nm. The specific discharge capacities of the LiFePO₄ particles are 151.3 and 128.0 mA·h·g^-1 after first cycle at the rates of 0.1 and 1.0 C, respectively. It retains 95.0% of the initial capacity after 100 cycles at 1.0 C.

Key words: LiFePO₄, supercritical hydrothermal synthesis, lithium iron

张艳洁, 杨艳芳, 王学勇, 李帅三. Synthesis of Sub-micrometer Lithium Iron Phosphate Particles for Lithium Ion Battery by Using Supercritical Hydrothermal Method[J]. Chinese Journal of Chemical Engineering, 2014, 22(2): 234-237.

ZHANG Yanjie, YANG Yanfang, WANG Xueyong, LI Shuaisan. Synthesis of Sub-micrometer Lithium Iron Phosphate Particles for Lithium Ion Battery by Using Supercritical Hydrothermal Method[J]. Chin.J.Chem.Eng., 2014, 22(2): 234-237.

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

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

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