期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 58, 期 20, 页码 6669-6673出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201902083
关键词
atomic-scale distribution; carbon; lithium-ion batteries; microporous materials; silicon-based anodes
资金
- National Natural Science Foundation of China [51702046, 51772050, 51432004, 51822202]
- Innovation Program of Shanghai Municipal Education Commission [2017-01-07-00-03-E00025]
- Shanghai Committee of Science and Technology, China [17ZR1401000, 18JC1411200]
- Shanghai Pujiang Program [17PJ1400100]
- Program for Professors of Special Appointment (Eastern Scholars) at Shanghai Institutions of Higher Learning
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University
- International Joint Laboratory for Advanced Fiber and Low-Dimension Materials [18520750400]
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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