Abstract
The highly crystallized β-MnO2 with the narrowest [1 × 1] channels prepared by direct thermal decomposition of Mn(NO3)2 does not provide much capacity due to the poor kinetics of the lithium intercalation/deintercalation process. In the present work, we report the preparation and electrochemical performance of an ordered mesoporous β-MnO2 as a positive electrode for rechargeable lithium batteries. The well-ordered mesoporous β-MnO2 prepared using mesoporous silica KIT-6 as a template by thermal decomposition of Mn(NO3)2 exhibits high initial capacity, reaching a chemical composition of Li0.75MnO2, and it also shows a good rate capability and cycling ability. The correlation between the specific mesoporous structure and the superior electrochemical performance was discussed in detail.
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