Preparation of ZnWO₄/graphene composites and its electrochemical properties for lithium-ion batteries

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• 作者：Linsen Zhang ; Zhitao Wang ; Linzhen Wang ; Yu Xing ; Yong Zhang
• 关键词：ZnWO4/graphene ; Lithium-ion battery ; Composite materials ; Sol&ndash ; gel preparation ; Electrochemical performance
• 刊名：Materials Letters
• 出版年：2013
• 出版时间：1 October, 2013
• 年：2013
• 卷：108
• 期：Complete
• 页码：9-12
• 全文大小：1787 K

文摘

ZnWO₄/graphene anode materials were prepared by a sol-gel method. The structured features of these anode materials were analyzed by XRD, while their morphologies were characterized by TEM and SEM. The electrochemical performances of ZnWO₄/graphene were investigated by galvanostatic charge/discharge measurements, cyclic voltammetry (CV) and electrochemical impedance spectra (EIS) tests. The results showed that the first cycles of the reversible specific capacity of ZnWO₄/graphene composite materials may reach 695 mAhg^?1 at 50 mAg^?1. The performance tests of rate showed that ZnWO₄/graphene is suitable for high-current charge and discharge.