Reverse microemulsion-assisted in situ SiO₂ interfacial engineering for enhanced stability of NCM523 cathodes.

Authors

Guowei Jia, Xianshuai Liu, Yuanzhi Zhu, Feng Wu, Dong Feng, Yang Meng, Yi Mei, Delong Xie, Yuhui Xie

Published in

Nanoscale. Jul 14, 2026. Epub Jul 14, 2026.

Abstract

Interfacial instability and structural degradation remain critical challenges for layered oxide cathodes in lithium-ion batteries. Herein, a reverse microemulsion-assisted strategy is reported to achieve in situ SiO₂ interfacial engineering of NCM523 cathodes during precursor synthesis. The introduction of an amphiphilic silane coupling agent enables synergistic regulation of particle growth and formation of a conformal amorphous SiO₂ coating after calcination. By optimizing the SiO₂ content, the NCM-3%Si cathode exhibits reduced polarization, suppressed interfacial side reactions, and improved structural integrity during electrochemical cycling. As a result, enhanced cycling stability and rate performance are achieved compared with the uncoated counterpart. This work demonstrates that microemulsion-assisted in situ coating provides an effective route for interfacial stabilization of layered oxide cathodes and offers practical insights for improving the durability of lithium-ion battery materials.

PMID:
42444421
Bibliographic data and abstract were imported from PubMed on 14 Jul 2026.

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