Mesoporous composite cathode materials prepared from inverse micelle structures for high performance lithium ion batteries

Abstract

Mesoporous Li₄Mn₅O₁₂/Li₂MnO₃ composite cathodes are prepared from inverse micelle structures for high-performance LIBs. The relative ratio of layered Li₂MnO₃ to spinel Li₄Mn₅O₁₂ in the composite electrodes could be elaborately controlled as a function of molar ratio of LiNO₃ to Mn(NO₃)₂ (Li/Mn) in the precursor. All Li₄Mn₅O₁₂/Li₂MnO₃ composite cathodes exhibit relatively large specific surface areas and mesoporous character, which might be favorable for lithium-ion mobility. The relative ratio of layered Li₂MnO₃ to spinel Li₄Mn₅O₁₂ in the composite electrodes were elaborately controlled as a function of molar ratio of LiNO₃ to Mn(NO₃)₂ (Li/Mn) in the precursor. Our results suggest the better cycle performance of Li excess materials with a solid solution of Li₄Mn₅O₁₂/Li₂MnO₃ is due to stabilization of the Li₂MnO₃ structure by addition of a layered component.