Vertically Grown Few-Layer MoS ₂ Nanosheets on Hierarchical Carbon Nanocages for Pseudocapacitive Lithium Storage with Ultrahigh-Rate Capability and Long-Term Recyclability

Molybdenum disulfide (MoS ₂ ) 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 MoS ₂ nanosheets, vertically grown on hierarchical carbon nanocages (hCNC) by a facile hydrothermal method, introduce pseudocapacitive lithium storage owing to the highly exposed MoS ₂ basal planes, enhanced conductivity, and facilitated electrolyte access arising from good hybridization with hCNC. Thus, the optimized MoS ₂ /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 MoS ₂ -based anode materials. The specific power and specific energy, which can reach 16.1 kWkg _electrode ^-1 and 252.8 Whkg _electrode ^-1 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.