Catalysis Letters

, Volume 147, Issue 12, pp 2962–2966 | Cite as

Enhanced Cycle Performance of Silicon-Based Anode by Annealing Cu-Coated Carbon Cloth Current Collector for Flexible Lithium-Ion Battery

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Abstract

Cu-coated carbon cloth (Cu/CC) fabrics with protuberance surface have been prepared in the work and evaluated as anode current collectors in Li-ion batteries. Firstly, the copper layers are formed on the carbon cloth surface by electrodepositing method. After annealing at 400 °C, hole and protuberance structure appears within the copper layers. Finally the electrodes are fabricated by annealed Cu/CC fabrics and silicon as current collectors and anode active materials for Li-ion batteries. The electrochemical properties of silicon cells with bare copper and copper layers coated current collectors are investigated. The initial discharge capacities are 1250 mAh/g at current density of 210 mA/g (0.05 C, C = 4200 mA/g). The batteries have good cycle performance and the capacities still remain 98% (compare with initial capacities) after 40 cycles. The good cycle performance of Cu/CC anodes are attributes to the particular morphology of copper layers. The expansion space of silicon materials can be buffered by protuberance structure during cycles. In addition, the Cu/CC electrode have good electrical conductivity and flexibility, which are expected to be used in flexible batteries and silicon based Li-ion batteries.

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Keywords

Cycle performance Silicon-based anode material Annealing Cu-coated carbon cloth Current collector Flexible lithium ion battery 
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Notes

Acknowledgements

The authors express their gratitude for the Natural Sciences and Science & Technology Foundation for Selected overseas Chinese scholar of Tianjin for financial support to actualize this project. Tianjin University of Technology provides a postgraduate scholarship.

Compliance with Ethical Standards

Conflict of interest

Authors declare no existing conflict of interest.

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© Springer Science+Business Media, LLC 2017

Authors and Affiliations

  1. 1.Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, School of Chemistry and Chemical EngineeringTianjin University of TechnologyTianjinChina

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