Clear alkali-ion intercalation mechanism
Elucidates two-stage alkali-ion storage and phase evolution in Sn₄P₃, guiding design of durable alloy anodes for Li/Na/K batteries.
Sun, Shuting · Liu, Chen · Wang, Wenhui · Li, Ruhong · Zhao, Li · Dai, Changsong
ACS Nano 2024
Two-stage storage: insertion followed by conversion
Follows 'shrinking core mechanism' in KIBs
K-Sn-P phases form during conversion in KIBs, not K-Sn alloys