标题:Multiphase Ge-based Ge/FeGe/FeGe2/C composite anode for high performance lithium ion batteries
作者:Wei, Denghu ;Zeng, Suyuan ;Li, Haibo ;Li, Xiaona ;Liang, Jianwen ;Qian, Yitai
作者机构:[Wei, Denghu ] School of Materials Science and Engineering, Liaocheng University, Liaocheng; Shandong; 252059, China;[Li, Xiaona ;Qian, Yitai ] Hefei 更多
通讯作者:Wei, Denghu
来源:Electrochimica Acta
出版年:2017
卷:253
页码:522-529
DOI:10.1016/j.electacta.2017.09.105
摘要:A multiphase Ge-based Ge/FeGe/FeGe2/C (Fe-Ge-C) composite is prepared through the reaction between ferrous tartrate and GeO2at Ar/H2atmosphere, in which the active Ge, alloying components and amorphous carbon are generated synchronically. When evaluated as an anode material for lithium ion batteries, the Fe-Ge-C anode manifests an enhanced capacity of 1095 mA h g−1at 0.1 A g−1and with capacity retention of 890 mA h g−1at 0.5 A g−1over 400 cycles. A good rate capacity of 465 mA h g−1at 10 A g−1is also obtained. The synchronically formed conductive alloying components and amorphous carbon lead to the long cycle stability, and good rate capability. Furthermore, the synthetic route could be extended to the preparation of other kinds of multiphase Ge-based composites.
© 2017 Elsevier Ltd
收录类别:EI
资源类型:期刊论文
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