Electrochemical and XPS study of LiFePO4 cathode nanocomposite with PPy/PEG conductive network

被引：52

作者：

Fedorkova, A. ^{[1
]}

Orinakova, R. ^{[1
]}

Orinak, A. ^{[1
]}

Kupkova, M. ^{[2
]}

Wiemhoefer, H. -D. ^{[3
]}

Audinot, J. N. ^{[4
]}

Guillot, J. ^{[4
]}

机构：

[1] Safarik Univ, Fac Sci, Inst Chem, SK-04154 Kosice, Slovakia

[2] Slovak Acad Sci, Inst Mat Res, SK-04353 Kosice, Slovakia

[3] Univ Munster, Dept Inorgan & Analyt Chem, D-48149 Munster, Germany

[4] Gabriel Lippmann Publ Res Ctr, Dept Sci & Anal Mat, L-4422 Belvaux, Luxembourg

来源：

SOLID STATE SCIENCES | 2012年 / 14卷 / 08期

关键词：

Lithium iron phosphate; Polypyrrole; Polyethylene glycol; Lithium-ion batteries; XPS; LITHIUM-ION BATTERIES; SECONDARY BATTERY; CRITICAL SIZE; HIGH-CAPACITY; POLYPYRROLE; COMPOSITE; PERFORMANCE; POLYTHIOPHENE; ELECTROLYTE; STABILITY;

D O I：

10.1016/j.solidstatesciences.2012.06.010

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

High performance PPy/PEG-LiFePO4 nanocomposites as cathode materials were synthesized by solvothermal method and simple chemical oxidative polymerization of pyrrole (Py) monomer on the surface of LiFePO4 particles. The samples were characterized by scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDX), x-ray photoelectron spectrometry (XPS) and charge-discharge tests. PPyPEG hybrid layers decrease particle to particle contact resistance while the impedance measurements confirmed that the coating of PPy-PEG significantly decreases the charge transfer resistance of the electrode material. The initial discharge capacities of this sample at C/5 and 1C are 150 and 128 mAh/g, respectively. The results show that PPy/PEGLiFePO(4) composites are more effective than bare LiFePO4 as cathode material. (C) 2012 Elsevier Masson SAS. All rights reserved.

引用

页码：1238 / 1243

页数：6

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