Vertically Grown Few-Layer MoS₂ Nanosheets on Hierarchical Carbon Nanocages for Pseudocapacitive Lithium Storage with...

Molybdenum disulfide (MoS₂ ) is an intensively studied anode material for lithium-ion batteries (LIBs) owing to its high theoretical capacity, but it is still confronted by severe challenges of unsatisfactory rate capability and cycle life. Herein, few-layer MoS₂ nanosheets, vertically grown on hierarchical carbon nanocages (hCNC) by a facile hydrothermal method, introduce pseudocapacitive lithium storage owing to the highly exposed MoS₂ basal planes, enhanced conductivity, and facilitated electrolyte access arising from good hybridization with hCNC. Thus, the optimized MoS₂ /hCNC exhibits reversible capacities of 1670 mAh g^-1 at 0.1 A g^-1 after 50 cycles, 621 mAh g^-1 at 5.0 A g^-1 after 500 cycles, and 196 mAh g^-1 at 50 A g^-1 after 2500 cycles, which are among the best for MoS₂ -based anode materials. The specific power and specific energy, which can reach 16.1 kW  $$ and 252.8 Wh  $$ after 3000 cycles, respectively, indicate great potential in high-power and long-life LIBs. These findings suggest a promising strategy for exploring advanced anode materials with high reversible capacity, high-rate capability, and long-term recyclability.