WS2-Super P nanocomposites anode material with enhanced cycling stability for lithium ion batteries

JOURNAL OF ALLOYS AND COMPOUNDS

卷:673

Article

Huang, Jianfeng¹  Wang, Xin¹  Li, Jiayin¹  Cao, Liyun¹  Xu, Zhanwei¹  Wei, Hao² 

[1] Shaanxi Univ Sci & Technol, Sch Mat Sci & Engn, Xian 710021, Shaanxi, Peoples R China

[2] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, 800 Dongchuan Rd, Shanghai 200240, Peoples R China

关键词: Tungsten disulfide;    Super P;    Cycling stability;    Electrode materials;    Lithium ion batteries;   

DOI  :  10.1016/j.jallcom.2016.02.237

来源: Elsevier

【 摘 要 】

WS2-Super P nanocomposites are prepared for lithium battery anodes by a simple two-step process consisting of hydrothermal and sulfide reduction reactions. The addition of Super P (50 nm) as a conductive addictive is beneficial for decreasing the size of nanocomposites and improving their dispersibility, which could accelerate the insertion/extraction reaction between WS2-Super P nanocomposite electrode and electrolyte. Compared to the pure WS2, the WS2-Super P nanocomposites exhibit highly improved electrochemical performance with initial discharge capacity of 421 mAh g(-1), high initial Coulombic efficiency (81%), low charge transfer impedance (53 Omega) and good retentive capacity of 389 mAh g(-1) after 200th cycles. The much improved electrochemical performance can be attributed to the incorporation of Super P, which facilitates the interface charge transfer and Li+ diffusion. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

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