Silicon (Si) based materials represent an important class of materials for advancing the lithium-ion batteries. Improving the cycling stability of Si anode to achieve the high theoretical capacity and low working potential as the lithium-ion battery, which has a potential to replace the traditional graphite anode materials, is challenging. In contrast to the traditional hydrothermal method for preparing the Si materials at high temperature, this report discusses recent results of an investigation aiming at developing N-doped graphene wrapped and amino-modified Si nanoparticles (NH2-Si/NG) via chemical reduction method under a low temperature and shorter reaction time. Results from the cycling performance and rate capability of NH2-Si/NG electrode closely correlate with the nitrogen content in NH2-Si/NG, showing a strong interaction between Si nanoparticles and NG. The unique structure of NH2-Si/NG and its potential in controlling the volume expansion problem and enhancing the stability during the cycling process will also be discussed.

Modified silicon nanoparticles as advanced anode materials and the improved electrochemical performance for lithium-ion battery

256th National Meeting (2018)

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