2026-08-26 信州大学
＜関連情報＞
- https://www.shinshu-u.ac.jp/institution/arg/news/post-16.html
- https://www.shinshu-u.ac.jp/institution/arg/docs/電池材料の表面をフッ素で変え、内部構造と界面反応を同時に安定化.pdf
- https://www.nature.com/articles/s43246-026-01330-7
表面フッ素化によるニッケルリッチNCM811の構造および界面の統一的安定化 Unified structural and interfacial stabilization of Ni-rich NCM811 via surface-enriched fluorination
Nobuyuki Zettsu,Attila Taborosi,Daniela Maria Josepetti,Youn Charles-Blin,Takumi Kondo,Kensuke Tsunoda,Kenjiro Hara,Hiromasa Shiiba,Shunsuke Narumi,Tien Quang Nguyen,Michihisa Koyama,Long Hoang Bao Nguyen & Nicolas Louvain
Communications Materials Published:20 August 2026
DOI:https://doi.org/10.1038/s43246-026-01330-7
Abstract
Fluorine incorporation offers a powerful route to stabilize Ni-rich layered cathodes, yet its atomic-scale impact on structural evolution, interfacial chemistry, and electrode–electrode cross-talk has remained poorly understood. Here, we demonstrate that a controlled XeF2 solid–gas fluorination process creates a fluorine-enriched near-surface region in LiNi0.8Co0.1Mn0.1O2, modifying both structural evolution and electrolyte interactions. Fluorination reduces c-axis contraction, moderates structural changes associated with the H2 → H3 transition, and improves Li+ transport kinetics. Spectroscopic analysis reveals that the modified surface promotes preferential DMC adsorption via O···TM/Li coordination on the (104) facet, suppressing EC-driven electrolyte decomposition and suppressing CEI overgrowth. Operando FT-IR and XPS further indicate reduced cathode–anode cross-talk and mitigated phosphorus-containing species formation on the graphite anode. As a result, the optimized fluorinated cathode exhibits improved rate capability and enhanced long-term full-cell stability. These findings demonstrate the surface-enriched fluorination simultaneously regulates structural evolution and interfacial chemistry, providing a practical strategy for improving the durability of high-energy Ni-rich cathodes.
