Synthesis of LiFePO4/graphene microspheres while avoiding restacking of graphene sheet's for high-rate lithium-ion batteries

被引：21

作者：

Kim, Myeong-Seong ^{[1
]}

Lee, Geon-Woo ^{[1
]}

Lee, Suk-Woo ^{[1
]}

Jeong, Jun Hui ^{[1
]}

Mhamane, Dattakumar ^{[1
,2
]}

Roh, Kwang Chul ^{[3
]}

Kim, Kwang-Bum ^{[1
]}

机构：

[1] Yonsei Univ, Dept Mat Sci & Engn, 134 Shinchon Dong, Seoul 120749, South Korea

[2] Sangameshwar Coll, Dept Chem, Solapur 413001, Maharashtra, India

[3] Korea Inst Ceram Engn & Technol, Energy Mat Ctr, Energy & Environm Div, 101 Soho Ro, Jinju Si 660031, Gyeongsangnam D, South Korea

来源：

JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY | 2017年 / 52卷

基金：

新加坡国家研究基金会;

关键词：

Graphene based composite; Restacking of graphene; High-rate lithium ion batteries; High performance cathode materials; Energy efficiency; CATHODE MATERIALS; MULTILAYERED GRAPHENE; LIFEPO4; CATHODES; HIGH-CAPACITY; PERFORMANCE; COMPOSITE; CARBON; LINI0.5MN1.5O4; NANOCOMPOSITE; ELECTRODES;

D O I：

10.1016/j.jiec.2017.03.054

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

LiFePO4/graphene microspheres are synthesized while avoiding the restacking of graphene sheets using a spray-drying process and a subsequent heat treatment. To determine an optimal condition for preventing the restacking of graphene sheets in the composites, we control the weight ratio of LiFePO4 to rGO. When the amount of rGO in the composite exceeds a specific amount, the rGO sheets are spontaneously restacked. The restacked rGO sheets impede the Li ion movement, which is leading to the deterioration of the electrochemical performance at high C-rates. The microspheres synthesized exhibit a high specific capacity, excellent rate capability, and good cycling stability. (C) 2017 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.

引用

页码：251 / 259

页数：9

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