In:
Journal of Materials Chemistry A, Royal Society of Chemistry (RSC), Vol. 11, No. 4 ( 2023), p. 1694-1703
Abstract:
High-capacity silicon (Si) electroactive materials are actively explored to develop practical lithium-ion batteries (LIBs). Unfortunately, they suffer from structural instability at the material and electrode levels, resulting in early cycle failure. Therefore, various crystallographic/morphological controls of Si have been used to achieve electrochemical/structural stability and high reversible capacity to ultimately deploy Si anodes in practical applications. This study constructs mixed amorphous–crystalline Si (MACS) microparticles with localized heteroatom bridges in a Si crystal from borosilicate glass. This unique structure improves ion diffusivity and electrode integrity based on the structural modification of Si microparticles and the unusual electrochemical participation of heteroatom bridges. Finally, it exhibits capacity retention of 90.8% after 500 cycles and alleviates structural deformation with a thickness expansion of 93% for 300 cycles in a fast-charging system. The full cell, paired with LiNi 0.6 Co 0.2 Mn 0.2 O 2 (NCM622), shows sustainable capacity retention and electrochemical kinetics over 500 cycles. In addition, a low-cost, scalable synthetic system is demonstrated to assess the feasibility of Si production. This advanced Si structure offers a feasible way to realize a rational material structure and practical approach for stable and large-scale battery systems.
Type of Medium:
Online Resource
ISSN:
2050-7488
,
2050-7496
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2023
detail.hit.zdb_id:
2702232-8
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