Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4766785 | Electrochimica Acta | 2017 | 27 Pages |
Abstract
Carbon-coated core-shell structure artificial graphite@plasma nano-silicon@carbon (AG@PNSi@C) composite, applying as lithium ion battery anode material, has been prepared via spray drying method. The plasma nano-silicon (<100 nm), which contained amorphous silicon, was synthesized by radio frequency induction plasma system with the high temperatures processing capability and high quench rates. The artificial graphite in the composite acts as the core which supports the particle and provides electroconductivity, while PNSi attached on the surface of the core, enhances the specific capacity of the composite. The as prepared composite shows superior performance as anode in lithium-ion batteries, regarding to the initial Coulombic efficiency and cycle life. The initial Coulombic efficiency of AG@PNSi@C electrode is 81.0% with a discharge capacity of 553 mAh gâ1 and a recharge capacity of 448 mAh gâ1. During cycling, AG@PNSi@C exhibits excellent performance with a very low capacity fading that the discharge capacity maintains 498.2 mAh gâ1 and 449.4 mAh gâ1 after 250 cycles and 500 cycles. AG@PNSi@C also shows enhanced resistance against high current density. Besides the remarkable electrochemical performances, the facile and mass-producible synthesis process makes the AG@PNSi@C composite very promising for its application in lithium-ion batteries.
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Authors
Hedong Chen, Zhoulu Wang, Xianhua Hou, Lijun Fu, Shaofeng Wang, Xiaoqiao Hu, Haiqing Qin, Yuping Wu, Qiang Ru, Xiang Liu, Shejun Hu,