Woo-Seong Kim

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

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.