Silicon/CNTs/Graphene Free-standing Anode Material for Lithium-ion Battery

【Author】

BAI Xue-Jun;LIU Chan;HOU Min;WANG Biao;CAO Hui;FU Jun-Jie

【Institution】

Shanghai Aerospace Power Technology Co., LTD;Shanghai Aerospace Power Technology Co., LTD;Shanghai Aerospace Power Technology Co., LTD;College of Material Science and Engineering, Donghua University;Shanghai Aerospace Power Technology Co., LTD;Shanghai Institute of Space Power Source;Shanghai Geophysical Branch, Sinopec Offshore Oilfield Services Company

【Abstract】

Porous 2D Silicon/CNTs/Graphene free-standing composites were prepared via a solution-based self-assembly process with vapor post-treatment and applied as anodes for lithium-ion batteries. Silicon nanoparticles (~50 nm) as active materials were uniformly embedded between graphene sheets without agglomeration. Graphene was used as electrical conductive carbon matrix to form a 2D conductive network for electrons. CNTs, with high electrical conductivity and mechanical strength, formed a scaffold along with graphene to enhance the conductivity and mechanical properties of the carbon matrix. After vapor post-treatment, CNTs supported graphene film transferred from a tightly stacked film to a loose packed porous film. The porous structure of this free-standing composite anode provides large internal space to accommodate volumetric changes and provide abundant channels for diffusion of Li +, fast electron transport and easy penetration of electrolyte. The composites exhibite an outstanding rate performance and cyclic stability, delivering a capacity of 600 mAh/g at 4 A/g and 1 010 mAh/g after 100 cycles at 0.1 A/g. They also show high structure and mechanical stability after cycle test. It provides an exciting pathway to the rational design and fabrication of silicon anode and 2D graphene matrix for applications in lithium-ion batteries.

【Keywords】

graphene;silicon;lithium-ion battery;free-standing;vapor post-treatment

References

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Total: 34 articles

  • [1] WANG Hong-bo,ZHOU Yan-hong,TAO Zhan-liang,CHEN Jun(Institute of New Energy material Chemistry and Key Laboratory of Energy Material Chemistry,Nankai University,Tianjin 300071,China), Research progress of silicon-based anodes for lithium-ion batteries, Chinese Journal of Power Sources,
  • [2] Bingkun Guo;;Jie Shu;;Zhaoxiang Wang;;Hong Yang;;Lihong Shi;;Yinong Liu;;Liquan Chen, Electrochemical reduction of nano-SiO 2 in hard carbon as anode material for lithium ion batteries, Electrochemistry Communications,
  • [3] Byoung-Sun Lee;;Seoung-Bum Son;;Kyu-Min Park;;Jong-Hyun Seo;;Se-Hee Lee;;In-Suk Choi;;Kyu-Hwan Oh;;Woong-Ryeol Yu, Fabrication of Si core/C shell nanofibers and their electrochemical performances as a lithium-ion battery anode, Journal of Power Sources,
  • [4] Huixin Chen;;Ying Xiao;;Lin Wang;;Yong Yang, Silicon nanowires coated with copper layer as anode materials for lithium-ion batteries, Journal of Power Sources,

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