Journal
ELECTROCHIMICA ACTA
Volume 342, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2020.136068
Keywords
Lithium ion battery; Core-shell nanoparticles; Silicon based anode; Surface oxide; Silanol groups
Categories
Funding
- Startup Funding of Distinguished Professorship of 1000 Talents Program [31370086963030]
- Shandong Provincial Science and Technology Major Project [2016GGX104001, 2017CXGC1010, 2018JMRH0211, ZR2017MEM002]
- Fundamental Research Funds at Shandong University [2016JC005, 2017JC042, 2017JC010]
- National Science Foundation of Shandong Province [ZR2017BEM049]
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Silicon with higher theoretical capacity than that of the commercial graphite anode is considered as the next generation lithium ion battery anode materials. Herein, our research demonstrates that the surface SiOx coating with silanol groups generated in aqueous solution on silicon nanoparticles can efficiently improve their electrochemical performance. The SiOx layer can suppress the volume expansion of silicon particles, and the surficial silanol groups can also contribute to the enhanced electrochemical performance. Both coulombic efficiency and cycling stability can be improved with the optimal SiOx coating thickness. This work provides a facile avenue of surface engineering of silicon nanoparticle for the high-performance lithium ion battery Si anode. (C) 2020 Elsevier Ltd. All rights reserved.
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