Graphene-Based Composites as Cathode Materials for Lithium Ion Batteries

Libao Chen,Weifeng Wei,Ming Zhang

doi:10.1155/2013/940389

Libao Chen, Weifeng Wei + Show 1 more

Open Access

https://doi.org/10.1155/2013/940389

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Abstract

Owing to the superior mechanical, thermal, and electrical properties, graphene was a perfect candidate to improve the performance of lithium ion batteries. Herein, we review the recent advances in graphene-based composites and their application as cathode materials for lithium ion batteries. We focus on the synthesis methods of graphene-based composites and the superior electrochemical performance of graphene-based composites as cathode materials for lithium ion batteries.

Highlights

Graphene is a free-standing 2D crystal with one-atom thickness of carbon atom
We focus on the synthesis methods and electrochemical performance of graphene-based composites as cathode materials for lithium ion batteries
Chemical stability, and mechanical performance has been demonstrated to be excellent additive to improve the electrochemical performance of LiFePO4 as cathodes for LIBs

Summary

Introduction

Graphene is a free-standing 2D crystal with one-atom thickness of carbon atom. Those carbon atoms are sp2-hybridized atoms arranged in six-membered rings in a honeycombed network which is considered as the fundamental foundation for fullerenes, carbon nanotubes, and graphite [1]. As a kind of carbon materials, graphene has attracted increasing attention in a variety of fields because of its large specific surface area, good flexibility, superior chemical/thermal stability, and extraordinary electrical, and thermal, mechanical properties. One of the most important applications of graphene-based composites is electrode material for lithium ion batteries [12,13,14,15]. We focus on the synthesis methods and electrochemical performance of graphene-based composites as cathode materials for lithium ion batteries. Chemical stability, and mechanical performance has been demonstrated to be excellent additive to improve the electrochemical performance of LiFePO4 as cathodes for LIBs. With the help of graphene, the electrons could be transferred easly between current collectors and the LiFePO4 particles, reducing the internal resistance of the batteries and enhancing the output power. The first publication about LiFePO4graphene composites was finished by Ding and coworkers

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O2 stirring

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Findings

Perspectives and Challenges