期刊论文

Preparation and Characterization of LiFePO_4/ Graphene Composite Cathode Materials by High Temperature Reduction GO

Deng, Ling-Feng(denglingfeng168@126.com)

中文

材料工程

1001-4381

2018

46

2

9-15

10.11868/j.issn.1001-4381.2017.000752

国家自然科学基金重点资助项目（31530009）；

本校为第一且通讯机构

通过对氧化石墨烯(GO)进行微观调控处理得到少层GO。采用喷雾干燥再高温改性的方法制备LiFePO_4/石墨烯锂离子电池复合正极材料;GO还原后即可得到石墨烯,其优良的导电性可以提高LiFePO_4的电子传输能力。通过X射线衍射(XRD)、红外光谱(FTIR)、扫描电镜(SEM)、透射电镜(TEM)和电化学测试技术等方法对复合材料的结构、形貌及电化学性能进行表征。石墨烯的复合使材料颗粒间构建空间三维导电网络,提高了电解质/电极材料界面的电荷转移速率,改善了LiFePO_4的电化学性能。电化学测试结果表明,在0.1C时LiFePO_4的放电比容量为155mAh/g, LiFePO_4/石墨烯复合材料的放电比容量为164mAh/g;1C和2C倍率时,Li...

Micro layer of GO was obtained by micro adjustment and control. LiFePO4/graphene composite cathode materials were synthesized using a spray drying followed by high temperature reduction modification method, to improve conductivity of LiFePO4 with excellent conductivity of graphene. The structure, morphology and electrochemical performance of the composite materials were characterized by XRD, FTIR, SEM, TEM and electrochemical measurement technologies. The three-dimensional conductive network was constructed by graphene composite in material par...