Improvement of electrochemical performances of LiFePO4 cathode materials by coating of polythiophene

被引：57

作者：

Bai, Yong-mei ^{[1
]}

Qiu, Peng ^{[1
]}

Wen, Zhong-liu ^{[1
]}

Han, Shao-chang ^{[1
]}

机构：

[1] Hunan Univ, Coll Mat Sci & Engn, Changsha 410082, Hunan, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2010年 / 508卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Polythiophene; Lithium iron phosphate; Lithium ion batteries; Cathode materials; CARBON-COATED LIFEPO4; LITHIUM-ION BATTERIES; SECONDARY BATTERIES; COMPOSITE CATHODES; IRON; PHOSPHATE; POLYMERS;

D O I：

10.1016/j.jallcom.2010.05.173

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：

A series LiFePO4/polythiophene (LiFePO4/PTh) composites were synthesized by in situ polymerizing thiophene monomers on the surface of LiFePO4 particles. Electrochemical impedance spectra (EIS) measurements show that the coating of polythiophene significantly decreases the charge transfer resistance of LiFePO4 electrodes. Transmission electron microscopy (TEM) tests show that LiFePO4 could be completely coated by addition of proper amount of polythiophene. The electrochemical performance of polythiophene and LiFePO4/PTh for lithium insertion and extraction was examined by charge/discharge testing. The composites demonstrated an increased reversible capacity and better cycling ability compared to the bare LiFePO4. Crown Copyright (C) 2010 Published by Elsevier B.V. All rights reserved.

引用

页码：1 / 4

页数：4

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