Although Mn-site doping in LiMn2O4 mitigates Mn3+ -induced Jahn-Teller distortion responsible for cathode degradation in Li-ion batteries, this strategy faces inherent trade-offs, with low-valent doping weakening oxygen bonding and high-valent doping increasing the Mn3+ content. To address these limitations, the authors propose dual-lanthanide (La3+/Ce3+) co-doping and show that La3+ -Ce3+ cooperation mitigates Mn dissolution while stabilizing the spinel framework, with Ce ions additionally boosting conductivity.
- Zhushun Zhang
- Jun Du
- Jiabao Li