Mesoporous LiFePO4 microspheres for rechargeable lithium-ion batteries

被引：32

作者：

Du, Juan ^{[1
]}

Jiao, Lifang ^{[1
]}

Wu, Qiong ^{[1
]}

Liu, Yongchang ^{[1
]}

Qi, Zhan ^{[1
]}

Guo, Lijing ^{[1
]}

Wang, Yijing ^{[1
]}

Yuan, Huatang ^{[1
]}

机构：

[1] Nankai Univ, Tianjin Key Lab Met & Mol Based Mat Chem, Inst New Energy Mat Chem, Key Lab Adv Energy Mat Chem,MOE, Tianjin 300071, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2013年 / 98卷

关键词：

Mesoporous; Lithium iron phosphate; Microspheres; Cathode material; Lithium ion batteries; CATHODE MATERIAL; PHOSPHO-OLIVINES; PERFORMANCE; NANOCOMPOSITE; FE;

D O I：

10.1016/j.electacta.2013.02.124

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A series of mesoporous LiFePO4/C microspheres have been successfully synthesized via a hydrothermal process using citric acid as chelating agent and reductant. The growth evolution process of the precursor is systematically investigated based on the time-dependent experiments. Pure mesoporous LiFePO4 microspheres are obtained with a diameter of similar to 2 mu M, which are composed of numerous compact nanoparticles (similar to 200 nm). These microspheric LiFePO4 shows high tap density (1.35 g cm(-3)) and large Brunauer-Emmett-Teller (BET) surface area (20.992 m(2) g(-1)), which favor the electrochemical properties. The initial discharge capacity of LiFePO4/C microspheres is 163.8 mAh g(-1) at 0.1 C rate, corresponding to 96.4% of the theoretical capacity of LiFePO4 (170 mAh g(-1)). The material also shows excellent high rate capability (120.3 mAh g(-1), 10C), and cycling stability (a capacity retention of 98.1% at 0.5 C rate after 200 cycles). (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：288 / 293

页数：6

共 28 条

[1] Building better batteries [J].