Facile Synthesis of Nano-Si Modified Graphite Composite as Anode Material for Lithium Ion Batteries

被引:5
|
作者
Hou Jiao [1 ]
Gong Bo-Lin [1 ]
Hou Chun-Ping [2 ,3 ]
Wang Bei-Ping [2 ]
Yang Dan [3 ]
Wang Xing-Wei [3 ]
机构
[1] North Minzu Univ, Coll Chem & Chem Engn, Yinchuan Ningxia 750021, Peoples R China
[2] North Minzu Univ, Coll Mat Sci & Engn, Yinchuan Ningxia 750021, Peoples R China
[3] Ningxia BOLT Technol Co Ltd, Yinchuan Ningxia 750002, Peoples R China
来源
关键词
Nano-Si powder; Natural graphite; Composite; Liquid-phase; Carbon coating; RATE CAPABILITY; SILICON; PERFORMANCE; NANOCOMPOSITES; CHALLENGES; ELECTRODES; FRAMEWORK; HYBRIDS; BINDER;
D O I
10.20964/2019.04.22
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
We used a liquid-phase method to prepare a novel high capacity nano-Si modified graphite composite electrode material for lithium ion batteries. In this method, nano-Si powder was deposited onto the surface of natural spherical graphite using wet ball milling. CMC in solution was used as a binder between nano-Si and graphite and acted as a C coating in the sintering process. The acquired nano-Si modified graphite composite was investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM). Electrochemical tests showed that the C coated nano-Si modified graphite composite had good electrochemical properties, such as high specific capacity, good rate capability and cycling performance and therefore was suitable for use in power or energy storage batteries. The 5 wt% nano-Si sample had a high specific capacity of 464.8 mAh g(-1) at 0.1 C rate, which was approximately 87.37 % of the theoretical specific capacity (similar to 532 mAh g(-1)).
引用
收藏
页码:3455 / 3464
页数:10
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