Response surface optimization of process parameters for LiFePO4/C preparation with a low temperature carbothermal reduction method

被引：0

作者：

Long, Yun-Fei ^{[1
]}

Tan, Fang-Xiang ^{[2
]}

Yang, Ke-Di ^{[1
]}

Ge, Li ^{[1
]}

Lü, Xiao-Yan ^{[2
]}

Wen, Yan-Xuan ^{[1
]}

机构：

[1] School of Chemistry and Chemical Engineering, Guangxi University

[2] Educational Administration Department, Guangxi University

来源：

Gao Xiao Hua Xue Gong Cheng Xue Bao/Journal of Chemical Engineering of Chinese Universities | 2013年 / 27卷 / 01期

关键词：

Cathode materials; LiFePO[!sub]4[!/sub]/C; Lithium ion battery; Low-temperature carbothermal reduction; Response surface methodology;

D O I：

10.3969/j.issn.1003-9015.2013.01.021

中图分类号：

学科分类号：

摘要：

A low-temperature carbothermal reduction method was used to prepare the LiFePO4/C composites, and the response surface methodology was used to optimize the preparation process parameters. The sucrose amount, sintering temperature, sintering time and heating temperature were selected as four independent variables. The experimental data were collected by the central composite rotatable design (CCD), and the effects of the above four independent variables on the discharge capacity of the prepared LiFePO4/C were studied. A quadratic formula was obtained by response surface analysis between the discharge capacity of the prepared LiFePO4/C and the four parameters. The discharge capacity of the prepared LiFePO4/C depends more on the sintering temperature and sucrose amount than the other variables. The quadratic term of the four parameters, the sintering temperature, the sucrose amount and the interaction between the later two parameters have significant effects on the discharge capacity of the prepared LiFePO4/C. The obtained model reveals that the optimized LiFePO4/C preparation parameters are as follows: sintering temperature of 718°C, sucrose amount of 0.866 g·g-1 LiFePO4, 10.88 h sintering time and heating temperature of 105°C. Under these conditions, the actual discharge capacity of the prepared LiFePO4/C is 140.6 mA·h·g-1, and this value does not significantly different from that predicted by the model (142.03 mA·h·g-1).

引用

页码：125 / 130

页数：5

共 14 条

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