阳极
硅
材料科学
法拉第效率
纳米复合材料
介孔材料
混合材料
氧化硅
热解
化学工程
纳米尺度
氧化物
碳纤维
纳米技术
电极
复合材料
催化作用
光电子学
化学
复合数
冶金
有机化学
氮化硅
物理化学
工程类
作者
Guanjia Zhu,Fangzhou Zhang,Xiaomin Li,Wei Luo,Li Li,Hui Zhang,Lianjun Wang,Yunxiao Wang,Wan Jiang,Huan Liu,Shi Xue Dou,Jianping Yang
标识
DOI:10.1002/anie.201902083
摘要
The application of high-performance silicon-based anodes, which are among the most prominent anode materials, is hampered by their poor conductivity and large volume expansion. Coupling of silicon-based anodes with carbonaceous materials is a promising approach to address these issues. However, the distribution of carbon in reported hybrids is normally inhomogeneous and above the nanoscale, which leads to decay of coulombic efficiency during deep galvanostatic cycling. Herein, we report a porous silicon-based nanocomposite anode derived from phenylene-bridged mesoporous organosilicas (PBMOs) through a facile sol-gel method and subsequent pyrolysis. PBMOs show molecularly organic-inorganic hybrid character, and the resulting hybrid anode can inherit this unique structure, with carbon distributed homogeneously in the Si-O-Si framework at the atomic scale. This uniformly dispersed carbon network divides the silicon oxide matrix into numerous sub-nanodomains with outstanding structural integrity and cycling stability.
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