Facile ammonia-induced fabrication of nanoporous NiO films with enhanced lithium-storage properties

Nanoporous NiO films directly grown on the foam Ni are fabricated via a facile ammonia-induced route. As anode materials for lithium-ion batteries, nanoporous NiO films exhibit an outstanding rate capacity of 280 mAh·g− 1 at 10 C rate and high reversible capacity of 543 mAh·g− 1 after 100 cycles at 0.2 C rate. The fabrication strategy offers a novel approach to fabricate other thin film materials.

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► Nanoporous NiO films were fabricated via a facile ammonia-induced route.
► Nanoporous NiO films were used binder-free anode of lithium-ion batteries.
► Nanoporous NiO films show outstanding rate and cycling performance.