A study on the electrochemical characteristics of LiFePO4 cathode for lithium polymer batteries by hydrothermal method

被引：74

作者：

Jin, En Mei ^{[1
]}

Jin, Bo ^{[1
,2
]}

Jun, Dae-Kyoo ^{[1
]}

Park, Kyung-Hee ^{[1
]}

Gu, Hal-Bon ^{[1
]}

Kim, Ki-Won ^{[3
]}

机构：

[1] Chonnam Natl Univ, Dept Elect Engn, Kwangju 500757, South Korea

[2] Jilin Univ, Coll Mat Sci & Engn, Changchun 130025, Peoples R China

[3] Gyeongsang Natl Univ, ITRC Energy Storage & Convers, Jinju 660701, South Korea

来源：

JOURNAL OF POWER SOURCES | 2008年 / 178卷 / 02期

关键词：

LiFePO4; carbon black; hydrothermal method; solid polymer electrolyte;

D O I：

10.1016/j.jpowsour.2007.09.073

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Phospho-olivine LiFePO4 cathode materials were prepared by hydrothermal reaction at 150 degrees C. Carbon black was added to enhance the electrical conductivity of LiFePO4. LiFePO4-C powders (0, 3, 5 and 10 wt.%) were characterized by X-ray diffraction (XRD) and transmission electron microscope (TEM). LiFePO4-C/solid polymer electrolyte (SPE)/Li cells were characterized electrochemically by charge/discharge experiments at a constant current density of 0.1 mA cm(-2) in a range between 2.5 and 4.3 V vs. Li/Li+, cyclic voltammetry (CV) and ac impedance spectroscopy. The results showed that initial discharge capacity of LiFePO4 was 104 mAh g(-1). The discharge capacity of LiFePO4-C/SPE/Li cell with 5 wt.% carbon black was 128 mAh g(-1) at the first cycle and 127 mAh g(-1) after 30 cycles, respectively. It was demonstrated that cycling performance of LiFePO4-C/SPE/Li cells was better than that of LiFePO4/SPE/Li cells. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：801 / 806

页数：6

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