Partially Crystalline Zn2GeO4 Nanorod/Graphene Composites as Anode Materials for High Performance Lithium Ion Batteries

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• 作者：Rui Wang ; Songping Wu ; Yichao Lv ; Zhiqun Lin
• 刊名：Langmuir
• 出版年：2014
• 出版时间：July 15, 2014
• 年：2014
• 卷：30
• 期：27
• 页码：8215-8220
• 全文大小：375K
• ISSN：1520-5827

文摘

Zn₂GeO₄ nanorod/graphene composites (ZGCs) were yielded by a two-step hydrothermal processing. Crystalline and amorphous regions were found to coexist in a single Zn₂GeO₄ nanorod. The surface of the Zn₂GeO₄ nanorod was compactly covered and anchored by graphene sheets. The ZGCs were then utilized as anodes for lithium ion batteries (LIBs). Intriguingly, partially crystalline ZGC containing 10.2 wt % graphene possessed excellent electrochemical performance, namely, high reversible capacity (1020 mA h g^鈥? in the first cycle), favorable cyclic performance (768 mA h g^鈥? after 50 cycles), and commendable rate capability (780 mA h g^鈥? at the current density of 0.8A g^鈥?). The amorphous region in partially crystalline Zn₂GeO₄ nanorods and the elastic graphene sheets provided the accommodation of volume change during the charge and discharge processes. These advantageous attributes make ZGCs the potential anode materials for LIBs.