Authors
Wei-Wei Wang, Da-Kun Chen, Wei Kang, Xiao-Mei Wu, Qing Cao, Quan-Fang Wang, Si-Yuan Ma, Hai-Long Wang, Jing-Hua Tian, Zhong-Qun Tian
Published in
Advanced science (Weinheim, Baden-Wurttemberg, Germany). Nov 03, 2026. Epub Nov 03, 2026.
Abstract
The widespread use of Ni-rich LiNi0.8Co0.1Mn0.1O2 (NCM811) cathodes in high-energy batteries remains limited by structural degradation, side reactions, and oxygen release, yet most modification strategies prove incompatible with commercial materials. This work presents a facile solid-state method that achieves synergistic cerium ion (Ce3+) doping and CeO2 coating on commercial NCM811 by mixing with CeO2 nanoparticles followed by calcination. Structural and morphological analyses confirm Ce incorporation into the near-surface lattice and the formation of a nanoscale CeO2 layer without disturbing the layered framework. Electrochemical tests demonstrate that the optimal 1 wt.% Ce-modified sample exhibits superior rate capability and long-term stability, retaining 82.04% of its initial capacity after 500 cycles at 1 C, compared to 74.10% for pristine, owing to suppressed cation mixing, enhanced structural stability, and improved Li+ diffusion kinetics. Crucially, differential electrochemical mass spectrometry shows Ce modification curtails O2 release and reduces H2 and CO2 generation across various rates, effectively mitigating gas evolution associated with safety degradation. Accelerating rate calorimetry further confirms delayed thermal runaway and improved adiabatic stability. Overall, this work establishes a scalable post-treatment route to simultaneously boost the electrochemical performance and safety of commercial nickel-rich cathodes, offering a practical solution for next-generation lithium-ion batteries.
PMID:
42977543
Bibliographic data and abstract were imported from PubMed on 04 Nov 2026.
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