Electrochemical properties of LiNi0.8Co0.15Al0.05O2-graphene composite as cathode materials for lithium-ion batteries

被引：51

作者：

Yoon, Sukeun ^{[1
]}

Jung, Kyu-Nam ^{[1
]}

Yeon, Sun-Hwa ^{[1
]}

Jin, Chang Soo ^{[1
]}

Shin, Kyung-Hee ^{[1
]}

机构：

[1] Korea Inst Energy Res, New & Renewable Energy Res Div, Taejon 305343, South Korea

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2012年 / 683卷

关键词：

Lithium-ion batteries; Cathode; LiNi0.8Co0.15Al0.05O2; Graphene; Composite; PERFORMANCE; GRAPHENE; IMPROVEMENT; ELECTRODES; INSERTION; CELLS;

D O I：

10.1016/j.jelechem.2012.08.005

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A LiNi0.8Co0.15Al0.05O2-graphene composite has been synthesized by a high energy mechanical ball milling (HEMM) process. The structural and morphological features of the synthesized samples are characterized by various techniques. Electrochemical studies on the LiNi0.8Co0.15Al0.05O2-graphene composite are conducted using of the galvanostatic charge-discharge process and electrochemical impedance spectroscopy methods by constructing a lithium-ion cell. The LiNi0.8Co0.15Al0.05O2-graphene composite exhibits a high capacity of >180 mA h/g with good cyclability and high rate capability. The improved electrochemical performance is attributed to increased electrical contact provided by the graphene layer, which reduces the cell polarization. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：88 / 93

页数：6

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