文章基本信息

标题：In-situ One-step Hydrothermal Synthesis of a Lead Germanate-Graphene Composite as a Novel Anode Material for Lithium-Ion Batteries
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作者：Jun Wang ; Chuan-qi Feng ; Zi-qi Sun 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2015
卷号：4
期号：1
DOI：10.1038/srep07030
语种：English
出版社：Springer Nature
摘要：Lead germanate-graphene nanosheets (PbGeO₃-GNS) composites have been prepared by an efficient one-step, in-situ hydrothermal method and were used as anode materials for Li-ion batteries (LIBs). The PbGeO₃ nanowires, around 100–200 nm in diameter, are highly encapsulated in a graphene matrix. The lithiation and de-lithiation reaction mechanisms of the PbGeO₃ anode during the charge-discharge processes have been investigated by X-ray diffraction and electrochemical characterization. Compared with pure PbGeO₃ anode, dramatic improvements in the electrochemical performance of the composite anodes have been obtained. In the voltage window of 0.01–1.50 V, the composite anode with 20 wt.% GNS delivers a discharge capacity of 607 mAh g⁻¹ at 100 mA g⁻¹ after 50 cycles. Even at a high current density of 1600 mA g⁻¹, a capacity of 406 mAh g⁻¹ can be achieved. Therefore, the PbGeO₃-GNS composite can be considered as a potential anode material for lithium ion batteries.