前驱体配料温度对水热法制备LiFePO<sub>4</sub>的影响

引用本文: 赵浩川, 宋杨, 郭孝东, 钟本和, 董静, 刘恒. 前驱体配料温度对水热法制备LiFePO₄的影响[J]. 物理化学学报, 2011, 27(10): 2347-2352. doi: 10.3866/PKU.WHXB20110905 shu

Citation: ZHAO Hao-Chuan, SONG Yang, GUO Xiao-Dong, ZHONG Ben-He, DONG Jing, LIU Heng. Effect of Precursor Ingredient Temperature on the Performance of LiFePO₄ by Hydrothermal Method[J]. Acta Physico-Chimica Sinica, 2011, 27(10): 2347-2352. doi: 10.3866/PKU.WHXB20110905 shu

前驱体配料温度对水热法制备LiFePO₄的影响

赵浩川 ^1, ,
宋杨 ^1, ,
郭孝东 ^1, ,
钟本和 ^1, ,
董静 ^1, ,
刘恒 ^2,

基金项目:
国家科技支撑计划(2007BAQ01055)资助项目 (2007BAQ01055)

摘要: 研究了配料温度对水热法制备磷酸铁锂的影响. 通过X 射线衍射(XRD)、扫描电镜(SEM)、循环伏安(CV)以及元素分析等手段分析了不同温度下制备的前驱体和最终的LiFePO₄样品, 其结果表明配料温度对磷酸铁锂前驱体颜色和特性有明显影响. 通过仔细控制该温度可以制得高纯Li₃PO₄ 中间体并抑制前驱体中Fe(OH)₃的形成. 有利于进一步获得结晶良好不含Fe³⁺的LiFePO₄样品, 显著提高了LiFePO₄材料的放电比容量. 当配料温度为30 °C时获得的样品, 0.1C倍率下放电比容量达到156 mAh·g^-1, 0.5C倍率下放电比容量为151 mAh·g^-1, 10C倍率下放电比容量为127 mAh·g^-1, 循环20次容量保持率达99%.

关键词:

锂离子电池
/ 正极
/ 水热法
/ 磷酸铁锂
/ 温度

English

Effect of Precursor Ingredient Temperature on the Performance of LiFePO₄ by Hydrothermal Method

1.
1. College of Chemical Engineering, Sichuan University, Chengdu 610065, P. R. China;
2. College of Materials Science and Engineering, Sichuan University, Chengdu 610064, P. R. China
Received Date: 25 April 2011
Available Online: 27 September 2011
Fund Project:
国家科技支撑计划(2007BAQ01055)资助项目

Abstract: We investigated LiFePO₄ particles that were prepared by a hydrothermal reaction at different ingredient temperatures. The precursors and final LiFePO₄ products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), cyclic voltammetry (CV), and elemental analysis. The results show that ingredient temperature had a significant effect on the color and characteristics of the LiFePO₄ precursors. High purity Li₃PO₄ was obtained and the formation of Fe(OH)₃ in the precursors was inhibited by controlling the ingredient temperature carefully. In addition well-crystalline and free Fe³⁺ LiFePO₄ samples were synthesized, which greatly increased the discharge capacity of the LiFePO₄ cathode materials. At an ingredient temperature of 30 °C the discharge specific capacity of the as-prepared sample was found to be 156 mAh·g^-1 at 0.1C rate, 151 mAh·g^-1 at 0.5C rate and it remained 127 mAh·g^-1 even at a rate of 10C while the cycling retention rate was 99% after 20 cycles.

Key words:

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

前驱体配料温度对水热法制备LiFePO₄的影响

English

Effect of Precursor Ingredient Temperature on the Performance of LiFePO₄ by Hydrothermal Method

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

前驱体配料温度对水热法制备LiFePO4的影响

English

Effect of Precursor Ingredient Temperature on the Performance of LiFePO4 by Hydrothermal Method

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

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前驱体配料温度对水热法制备LiFePO₄的影响

Effect of Precursor Ingredient Temperature on the Performance of LiFePO₄ by Hydrothermal Method

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