覆银硅微通道板用于三维锂离子电池负极研究

王斐; 徐少辉; 祝珊珊; 楼薛锋; 惠珂霜; 杨平雄; 王连卫

覆银硅微通道板用于三维锂离子电池负极研究

1.
华东师范大学电子工程系,极化材料与器件教育部重点实验室,上海 200241

详细信息

中图分类号: O649.4
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- 被引次数: 0
出版历程
- 收稿日期: 2012-11-01
- 修回日期: 2013-02-01
- 刊出日期: 2013-09-25

Silver-coated silicon microchannel plates for three-dimensional lithium-ion batteries anodes

1.
Laboratory of Polar Materials and Devices, Ministry of Education, and Department of Electronic Engineering,East China Normal University, Shanghai 200241, China

摘要

摘要: 采用光辅助电化学刻蚀和无电镀银方法,制备出一种可用于三维锂离子电池的覆银硅微通道板（Ag/Si-MCP）负极结构. 利用XRD和扫描电镜（SEM）对材料特性进行表征；并在氩气氛保护下以锂片为对电极封装为CR2025半电池,采用恒流充放电测试、循环伏安法（CV）及交流阻抗法（EIS），对银覆盖层对电极性能的影响进行了细致的分析. 在0.02 V～1.5 V电位（vs. Li+/Li）范围内以10 mAg-1电流密度进行恒流充放电测试. 样品在首次充电（硅的锂合金化）过程中获得高达3 484.7 mAhg-1的比容量值，且在首次充放电循环中库仑效率达到95.97%. 并在随后的循环中，表现出优于未经覆银处理的硅微通道电极的性能.
- 硅微通道板 /
- 锂离子电池 /
- 三维微电池 /
- 负极
Abstract: In this work, a three-dimensional (3-D) anode using a silver-coated Si microchannel plate (Si-MCP) as the active materials was prepared by photo-assisted electrochemical etching followed by electroless deposition. Using lithium foils as the counter electrodes, representative half-cells are fabricated and tested. In galvanostatic charge-discharge (C-D) measurements at 10 mAg-1 between 0.02 and 1.5 V, our anode exhibits a charge capacity of 3484.7 mAhg-1 with a coulombic efficiency close to 95.97% in the initial cycle. Based on the cyclicvoltammetry (CV) and the electrochemical impedance spectroscopy (EIS) data, the mechanism about the lithiation of Ag-coated Si-MCP was also studied.
- silicon microchannel plate /
- lithium-ion batteries /
- three-dimensional microbatteries /
- anode

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