Highly electrochemical reaction of lithium in the ordered mesoporosus β-MnO2

The highly crystallized beta-MnO2 with the narrowest [ 1 x 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 beta-MnO2 as a positive electrode for rechargeable lithium batteries. The well- ordered mesoporous beta-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.