Anode properties and morphology evolution of three-dimensional lithium-ion battery electrodes comprising Ni-coated Si microchannel plates
Anode properties and morphology evolution of three-dimensional lithium-ion battery electrodes comprising Ni-coated Si microchannel plates
复制标题
DOI：
10.1016/j.jallcom.2013.02.115
复制
发表时间：
2013-06
影响因子：
6.2
通讯作者：
Fei Wang;Shanshan Zhu;Mai Li;Xuefeng Lou;K. Hui;Shaohui Xu;P. Yang;Lianwei Wang;Yiwei Chen
中科院分区：
文献类型：
--
作者：
Fei Wang;Shanshan Zhu;Mai Li;Xuefeng Lou;K. Hui;Shaohui Xu;P. Yang;Lianwei Wang;Yiwei Chen
以锂箔为对电极，以镀镍硅微通道板(Si-MCP)为基质和活性材料，制备了半电池并进行了测试。恒流充放电(C-D)测量采用100mAg−1，电压范围为0.05~1.5V。通过降低Li的插入/抽出水平，Ni/Si-MCP阳极的可逆放电容量分别保持在1000mAhg−1的80次循环和500mAhg−1的104次循环。用扫描电子显微镜(SEM)观察了Ni/Si-MCP在恒流循环后的形貌。根据电化学阻抗谱(EIS)和能量色散X射线谱(EDS)的结果，对电极衰退的机理进行了研究和描述。
Using lithium foils as the counter electrodes and Ni-coated Si microchannel plates (Si-MCPs) as the matrix and active materials, half-cells were fabricated and tested. Galvanostatic charge–discharge (C–D) measurements were conducted at 100mAg−1between 0.05 and 1.5V. By decreasing the Li insertion/extraction level, the Ni/Si-MCP anode retained the reversible discharge capacity of 1000mAhg−1for 80 cycles and 500mAhg−1for 104 cycles, respectively. The morphology of the Ni/Si-MCP after the galvanostatic cycles was examined by scanning electron microscope (SEM). Based on the results of electrochemical impedance spectroscopy (EIS) and energy-dispersive X-ray spectroscopy (EDS), the mechanism of electrode fading was investigated and described.