Electrochemical properties of carbon-coated LiFePO4 synthesized by a modified mechanical activation process

被引：61

作者：

Kim, Jae-Kwang ^{[1
,2
]}

Cheruvally, Gouri ^{[1
,2
]}

Ahn, Jou-Hyeon ^{[1
,2
]}

Hwang, Gil-Chan ^{[3
]}

Choi, Jin-Beom ^{[3
]}

机构：

[1] Gyeongsang Natl Univ, Dept Biol & Chem Engn, Jinju 660701, South Korea

[2] Gyeongsang Natl Univ, Engn Res Inst, Jinju 660701, South Korea

[3] Gyeongsang Natl Univ, Dept Earth & Environm Sci, Jinju 660701, South Korea

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2008年 / 69卷 / 10期

关键词：

Electronic materials; Chemical synthesis; Electron microscopy; Electrical conductivity; Electrochemical properties;

D O I：

10.1016/j.jpcs.2008.03.018

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Carbon-coated lithium iron phosphate (LiFePO4/C) composites were synthesized by conventional mechanical activation (MA) process and also by a modified MA process. Phase-pure particles were obtained of similar to 100nm size with a nano-meter thick web of carbon surrounding the particles. The composite prepared by the modified MA process shows good performance as cathode material in lithium cells at room temperature. A high performance was achieved at 0.1 C-rate with > 96% utilization of the active material. A stable cycle performance even at higher C-rates was achieved with a cathode that has a total carbon content of only 12wt%. The use of the modified MA process to synthesize LiFePO4/C has promise to be an efficient process to decrease the total carbon content of the cathode, resulting in the enhanced energy density. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：2371 / 2377

页数：7

共 37 条

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