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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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.
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Bai, B., Liu, Q. Enhanced Cycle Performance of Silicon-Based Anode by Annealing Cu-Coated Carbon Cloth Current Collector for Flexible Lithium-Ion Battery. Catal Lett 147, 2962–2966 (2017). https://doi.org/10.1007/s10562-017-2204-4
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DOI: https://doi.org/10.1007/s10562-017-2204-4