Facile mass production of nanoporous SnO₂ nanosheets as anode materials for high performance lithium-ion batteries

Facile one-step ultrasonic-assisted chemical precipitation strategy has been developed for the mass production of SnO₂ nanomaterials with different morphologies. As anode material for lithium-ion batteries, the nanoporous SnO₂ nanosheets exhibited an extremely high initial specific capacity of 2231mAh/g in comparison with 1242mAh/g of the SnO₂ microcrystals and 1244mAh/g of the nanoporous SnO₂ nanoflowers. Meanwhile the nanoporous SnO₂ nanosheet electrode displayed a specific capacity of 688mAh/g after 60 cycles at 0.2 A/g current density and an extraordinary capacity retention of 224mAh/g at a current density of 8A/g (approximately 10 C) owing to a huge increase of Li⁺ diffusion coefficient.