Improvement of Synthesis Method for LiFePO4/C Cathode Material by High-Frequency Induction Heating

被引：2

作者：

Uchida, Satoshi ^{[1
]}

Yamagata, Masaki ^{[1
]}

Ishikawa, Masashi ^{[1
]}

机构：

[1] Kansai Univ, Dept Chem & Mat Engn, Fac Chem Mat & Bioengn, Suita, Osaka 5648680, Japan

来源：

ELECTROCHEMISTRY | 2012年 / 80卷 / 10期

关键词：

Induction Heating; Carbothermal Reduction; LiFePO4; Lithium-Ion Battery; ELECTROCHEMICAL PROPERTIES; LITHIUM BATTERIES; ROOM-TEMPERATURE; ION BATTERIES; CARBON; ELECTRODES; ROUTE;

D O I：

10.5796/electrochemistry.80.825

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The present LiFePO4/C cathode material is synthesized via carbothermal reduction by a high-frequency induction heating method in extremely short heating time (within a few minutes). The electric conductivity of LiFePO4/C is improved to 1.9 x 10(-2) S cm(-1) by a short-time annealing process following a sintering process at 900 degrees C. An increase in the particle size and formation of Fe2P as impurity are suppressed by annealing at a relatively low temperature: 700 degrees C. The cathode containing annealed LiFePO4/C shows discharge capacities of 156.0, 136.3, and 100.1 mAh g(-1) at 1/10, 1, and 10C-rates (1C = 170 mA g(-1)), respectively, and its polarization between charge and discharge is smaller than that of non-annealed LiFePO4/C. Furthermore, the annealed LiFePO4/C cathode shows better charge and discharge rate performance than the non-annealed LiFePO4/C cathode. (C) The Electrochemical Society of Japan, All rights reserved.

引用

页码：825 / 828

页数：4

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