Dual lanthanides synergistically boost stability and kinetics for spinel LiMn₂O₄ cathodes.

ABSTRACT: Mn-site doping in spinel LiMn₂O₄ (LMO) mitigates Mn³⁺-induced Jahn-Teller distortion. However, this strategy faces inherent trade-offs. Specifically, low-valent doping weakens oxygen bonding, while high-valent doping increases Mn³⁺ content. To overcome these limitations, this work proposes dual-lanthanide (La³⁺/Ce³⁺) co-doping. Through sol-gel synthesis, LiLa_0.1Ce_0.1Mn_1.8O₄ (LLCMO) achieves synergistic performance enhancements. Particularly, La reduces Mn³⁺ content to 43.13%, suppressing lattice distortion and widening Li+ diffusion pathways via its large ionic radius. Concurrently, Ce (in a mixed Ce³⁺/Ce⁴⁺ state) enhances charge delocalization, low

SUBMITTER: Zhang Z 

PROVIDER: S-EPMC12789579 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature