期刊
RSC ADVANCES
卷 4, 期 102, 页码 58184-58189出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ra08797f
关键词
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资金
- National Natural Science Foundation of China [21171015, 21373195]
- Recruitment Program of Global Experts
- program for New Century Excellent Talents in the University [NCET-120515]
- Fundamental Research Funds for the Central Universities [WK2060140014, WK2060140016]
- Collaborative Innovation Center of Suzhou Nano Science and Technology
- Alexander von Humboldt Foundation
Germanium is a promising anode material for lithium ion batteries (LIBs) due to its high specific capacity, but it still suffers from poor cyclability. A simple method was developed to synthesize Ge-reduced graphene oxide nanocomposites using organic germanium as a precursor. The nanocomposites exhibit improved electrochemical performance with a reversible specific capacity of 814 mA h g(-1) after 50 cycles at a current density of 0.1 A g(-1). When cycled at a high current density of 2 A g (1), they still deliver a reversible specific capacity of 690 mA h g(-1) after 150 cycles. The improved electrochemical performance is attributed to the unique nanostructure (0D electro-active particles in 2D mixed conducting matrix), which conferred a variety of advantages: high flexibility of the graphene sheets for accommodating the volume change, good electrochemical coupling and short transport length for ions and electrons, enabling lowcontact resistances.
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