Silicon-carbon composite dispersed in a carbon paper substrate for solid polymer lithium-ion batteries

JOURNAL OF POWER SOURCES

卷:248

Article

Si, Q.¹  Kawakubo, M.¹  Matsui, M.¹  Horiba, T.¹  Yamamoto, O.¹  Takeda, Y.¹  Seki, N.²  Imanishi, N.¹ 

[1] Mie Univ, Grad Sch Engn, Dept Chem Mat, Tsu, Mie 5148507, Japan

[2] Gifu Prefectural Govt, Ind Technol Ctr, Mino, Gifu 5013716, Japan

关键词: PEO-based electrolyte;    Si/C composite electrode;    Carbon paper substrate;    Lithium-ion batteries;    Cycle performance;   

DOI  :  10.1016/j.jpowsour.2013.09.072

来源: Elsevier

【 摘 要 】

Carbon coated silicon (Si/C) dispersed in a carbon paper (CP) was examined as the anode for solid polymer lithium-ion batteries. The CP was prepared by pyrolysis of poly(acrylonitrile) fiber and Manila hemp non-woven cloth at 2600 degrees C under an inert atmosphere. The Si/C composite was formed by pyrolysis of a slurry consisting of Si power and a solution of polyvinyl chloride in tetrahydrofuran as the carbon source. Si/C:CP with a weight ratio of 20:100 had a high initial capacity of 980 mAh g(-1) of Si/C and a high initial columbic efficiency of 77%, and also exhibited excellent capacity retention with a reversible capacity of 710 mAh g(-1) of Si/C even after 250 cycles at a charge and discharge rate of 0.1 A g(-1). The carbon fiber framework in the carbon paper could adsorb the volume change of Si during the lithium insertion and stripping processes. (C) 2013 Elsevier B.V. All rights reserved.

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