Effect of particle size distribution on the electrochemical performance of micro-sized silicon-based negative materials

Si has been extensively examined as a potential alternative to carbonaceous negative materials, because it shows exceptional gravimetric capacity and abundance. In recent years, the strategy of using nano-structured silicon materials as building blocks to build micro-sized silicon-based materials ha...

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Bibliographic Details
Published in:RSC advances 2018-01, Vol.8 (16), p.8544-8551
Main Authors: Wu, Shuaijin, Yu, Bing, Wu, Zhaohui, Fang, Sheng, Shi, Bimeng, Yang, Juanyu
Format: Article
Language:English
Subjects:
Chemistry
Commercialization
Construction materials
Electrochemical analysis
Electrodes
Gravimetry
Particle size
Particle size distribution
Silicon
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Summary:Si has been extensively examined as a potential alternative to carbonaceous negative materials, because it shows exceptional gravimetric capacity and abundance. In recent years, the strategy of using nano-structured silicon materials as building blocks to build micro-sized silicon-based materials has been widely studied. In this work, a commercialized and benchmark micro-sized silicon-based material (denoted as SiO /C) is used as research target and three groups of materials with different particle size distributions (PSDs) were obtained by simply mechanical sieving. The effects of PSD on the electrochemical performance and electrode structure of micro-sized silicon-based negative electrodes are discussed. The optimized selection of micro-sized active material PSD presents a comprehensive way for developing and characterizing Si-based negative electrodes for practicable high-energy LIBs. In this case, the optimized SiO /C composite electrode with a particle size of 22.7 μm and narrow PSD shows enhanced cycling stability with a high capacity retention of 84.31% over 100 cycles.
ISSN:2046-2069
2046-2069
DOI:10.1039/c8ra00539g