High-power charge/discharge properties of LiFePO4/carbon composites with various carbon materials

被引：0

作者：

Kuwahara, Akira ^{[1
]}

Suzuki, Shinya ^{[1
]}

Miyayama, Masaru ^{[1
]}

机构：

[1] Univ Tokyo, Adv Sci & Technol Res Ctr, Meguro Ku, Tokyo 1538904, Japan

来源：

ELECTROCERAMICS IN JAPAN XI | 2009年 / 388卷

关键词：

Lithium ion batteries; LiFePO4; High-rate performance; LITHIUM;

D O I：

10.4028/www.scientific.net/KEM.388.45

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Electrochemical properties of LiFePO4/carbon composites with various carbon materials were investigated to achieve high-rate charge and discharge properties. LiFePO4/carbon composites were synthesized by a pyrolysis of a LiFePO4 precursor solution added with porous graphite or particulate carbon powders. The LiFePO4/Porous-graphite composite had a microstructure in which LiFePO4 particles existed on carbon surface and within pores. The LiFePO4/particulate-carbon composite had a microstructure in which each carbon particle was covered with LiFePO4 fine particles. The LiFePO4/porous-graphite and the LiFePO4/particulate-carbon composite electrodes showed high discharge capacities of 69 and 30 mAh g(-1) at a high current density of 4000 mA g(-1). The high electronic conductivity in the LiFePO4/Porous-graphite composite contributed to achieving the large discharge capacity at the high current density.

引用

页码：45 / 48

页数：4

共 8 条

[1] Reducing carbon in LiFePO4/C composite electrodes to maximize specific energy, volumetric energy, and tap density [J].

Chen, ZH ;

Dahn, JR .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2002, 149 (09) :A1184-A1189

[2] Porous olivine composites synthesized by sol-gel technique [J].

Dominko, R ;

Bele, M ;

Gaberscek, M ;

Remskar, M ;

Hanzel, D ;

Goupil, JM ;

Pejovnik, S ;

Jamnik, J .

JOURNAL OF POWER SOURCES, 2006, 153 (02) :274-280

[3] Porous, carbon-decorated LiFePO4 prepared by sol-gel method based on citric acid [J].

Gaberscek, M ;

Dominko, R ;

Bele, M ;

Remskar, M ;

Hanzel, D ;

Jamnik, J .

SOLID STATE IONICS, 2005, 176 (19-22) :1801-1805

[4] Li intercalation properties of LiFePO4/carbon composites prepared by hydrothermal method [J].

Kimura, K ;

Miyayama, M .

ELECTROCERAMICS IN JAPAN VII, 2004, 269 :139-142

[5] Phospho-olivines as positive-electrode materials for rechargeable lithium batteries [J].

Padhi, AK ;

Nanjundaswamy, KS ;

Goodenough, JB .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1997, 144 (04) :1188-1194

[6] Determination of the chemical diffusion coefficient of lithium in LiFePO4 [J].

Prosini, PP ;

Lisi, M ;

Zane, D ;

Pasquali, M .

SOLID STATE IONICS, 2002, 148 (1-2) :45-51

[7] Lithium batteries and cathode materials [J].

Whittingham, MS .

CHEMICAL REVIEWS, 2004, 104 (10) :4271-4301

[8] Optimized LiFePO4 for lithium battery cathodes [J].

Yamada, A ;

Chung, SC ;

Hinokuma, K .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2001, 148 (03) :A224-A229

← 1 →