Template-free synthesis of porous-LiFePO4/C nanocomposite for high power lithium-ion batteries

被引：20
作者：
Du, Jing [1 ]
Kong, Ling-Bin [1 ,2 ]
Liu, Hong [1 ]
Liu, Jin-Bei [1 ]
Liu, Mao-Cheng [1 ]
Zhang, Peng [1 ]
Luo, Yong-Chun [2 ]
Kang, Long [2 ]
机构：
[1] Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China
[2] Lanzhou Univ Technol, Sch Mat Sci & Engn, Lanzhou 730050, Peoples R China
来源：
ELECTROCHIMICA ACTA | 2014年 / 123卷
基金：
中国国家自然科学基金;
关键词：
Mesoporous LiFePO4/C; Template-free; High rate capability; LIFEPO4 ELECTRODE MATERIALS; CATHODE MATERIALS; MESOPOROUS LIFEPO4/C; POSITIVE-ELECTRODE; PHOSPHO-OLIVINES; PERFORMANCE; CARBON; COMPOSITE; POLYMER; IRON;
D O I：
10.1016/j.electacta.2013.12.157
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
LiFePO4 electrode material with large specific surface area and porous structure can achieve high energy and power capabilities, but current synthesis method is relatively complicated. Here, we report a facile synthesis of porous-LiFePO4/C (porous-LFP/C) nanocomposites, which require no templates or surfactants. The synthesized porous-LFP/C material possesses outstanding morphology with nano-sized, spherical particles, a desirable core-shell structure with uniform carbon film on the surface of LiFePO4 and with a specific surface area of 29.9 m(2) g(-1). The as-obtained porous-LFP/C nanocomposites show excellent rate capability and cycling stability. It delivers a discharge capacity of 143 and 126 mAh g(-1) at 5 C and 10 C rates, respectively, and exhibits desirable capacity retention after 500 cycles. Remarkably, it performed well even at 30 C (83 mAh g(-1)) with the 91% of initial capacity after 1000 cycles. (C) 2014 Elsevier Ltd. All rights reserved.
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页码：1 / 6
页数：6
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