Space-confinement of MnO nanosheets in densely stacked graphene: Ultra-high volumetric capacity and rate performance for lithium-ion batteries

Densely stacked graphene/MnO architecture has been prepared by thermal treatment of MnO2-intercalated graphite oxide. The obtained electrode displays ultra-high gravimetric/volumetric capacities (1000 mA h g−1/2288 mA h cm−3 at 0.1 A g−1), excellent rate capability (270 mA h g−1/618 mA h cm−3 at 8.0 A g−1), ultra-low volume expansion (18%) and outstanding cycling performance (118% of capacity retention after 300 cycles).110