et_7(5)_201800946.pdf 911 KB
Domi, Yasuhiro Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University / Center for Research on Green Sustainable Chemistry, Tottori University Researchers DB KAKEN
Usui, Hiroyuki Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University / Center for Research on Green Sustainable Chemistry, Tottori University Researchers DB KAKEN
Sugimoto, Kai Center for Research on Green Sustainable Chemistry, Tottori University / Department of Engineering, Graduate School of Sustainability Science, Tottori University
It is reported that silicon (Si) anodes with a smaller crystallite size show better electrochemical performance in lithium-ion batteries (LIBs); Si particles with different diameters are also used. However, it is yet to be clarified whether the better performance is attributed to crystallite size or particle diameter. The effect of Si crystallite size on its anode performance using Si particles having the same diameter and different crystallite sizes is investigated. Longer cycle life is obtained for smaller crystallite size, due to the small amount of the amorphous Li-rich Li—Si phase formed during charging. The phase is likely to form in a greater amount in Si particles with larger crystallite size, leading to degradation of the Si electrode at an early stage. Furthermore, Si electrodes with larger crystallite size show superior rate performance because of the high Li diffusion rate into the broader grain boundary; on the other hand, Si with smaller crystallite size should limit Li diffusion due to the narrower grain boundary. Therefore, smaller crystallite size helps improve the cycle life but deteriorates the rate performance of LIBs.
This is the peer reviewed version of the following article: Domi Yasuhiro, Usui Hiroyuki, Sugimoto Kai, et al. Effect of Silicon Crystallite Size on Its Electrochemical Performance for Lithium-Ion Batteries. ENERGY TECHNOLOGY. 2019. 7(5), which has been published in final form at https://doi.org/10.1002/ente.201800946. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.
Domi Yasuhiro, Usui Hiroyuki, Sugimoto Kai, et al. Effect of Silicon Crystallite Size on Its Electrochemical Performance for Lithium-Ion Batteries. ENERGY TECHNOLOGY. 2019. 7(5). doi:10.1002/ente.201800946
Faculty of Engineering/Graduate School of Engineering
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