Reaction Mechanisms on Solvothermal Synthesis of Nano LiFePO4 Crystals and Defect Analysis

被引：38

作者：

Huang, Xiankun ^{[1
]}

He, Xiangming ^{[2
,3
]}

Jiang, Changyin ^{[2
]}

Tian, Guangyu ^{[3
]}

Liu, Yongzhong ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, Dept Chem Engn, Xian 710049, Peoples R China

[2] Tsinghua Univ, Inst Nucl & New Energy Technol, Beijing 100084, Peoples R China

[3] Tsinghua Univ, State Key Lab Automot Safety & Energy, Beijing 100084, Peoples R China

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2017年 / 56卷 / 38期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

HYDROTHERMAL SYNTHESIS; CATHODE MATERIAL; ELECTROCHEMICAL PERFORMANCE; PARTICLE-SIZE; LITHIUM; CARBON; CONDUCTIVITY; ORIENTATION; DEPENDENCE; MORPHOLOGY;

D O I：

10.1021/acs.iecr.7b02009

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

A solvothermal process was used to synthesize LiFePO4 nanomaterials for lithium ion batteries. Reaction parameters such as reaction temperature and residence time were explored to obtain the optimal LiFePO4 sample. A three-stage reaction mechanism is proposed to better understand the solvothermal synthesis process. X-ray diffraction, scanning electron microscopy, and Fourier transform IR spectroscopy were used to investigate the prepared samples under different conditions. The LiFePO4 formation reaction occurred at a temperature as low as 89 degrees C. Defect analysis results showed that after 4 h of solvothermal treatment the concentration of lithium vacancy and Li-Fe antisite defects was too low to be detected. The charge discharge data of the obtained LiFePO4 showed that the carbon-coated LiFePO4 samples prepared at 180 degrees C after 4 h of solvothermal treatment had a discharge capacity of 160.6 mA h g(-1) at a discharge rate of 0.1C and 129.6 mA h g(-1) at 10C.

引用

页码：10648 / 10657

页数：10

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