提高锂离子电池负极的电化学储锂容量和倍率性能—三维互连碳管-NiO−SnO2网格膜

Tin dioxide (SnO2) possesses great potential as an anode material for lithium-ion batteries (LIBs) owing to its high theoretical specific capacity. However, the irreversible conversion of Sn SnO2 and enormous volume variation during charge/discharge process limit battery energy storage performance. In this study, ultrafine NiO nanoparticles (NPs) decorated on a three-dimensionally (3D) interconnected structurally integrated carbon tube (CT) scaffold (NiO/SnO2-NPs@3D-CT) is developed anode, eliminating any inactive component in electrode. The not only contributes capacity but also undergoes reduction Ni lithiation process, which catalyzes Li2O decomposition facilitates reversible SnO2. Additionally, open space 3D can host large number NiO/SnO2 NPs results short diffusion distance Li+ between electrolyte host. 3D-CT network serves fast electron transport channel. Consequently, unique structure endows with Li-ion (928.5 mA h g−1 at current density 1 A after 200 cycles) superior high-rate performance; instance, 633.5 be achieved even 4 g−1. We believe that unique, holds promise LIBs applications further extended other fields.