A Nanocrystalline Fe 2 O 3 Film Anode Prepared by Pulsed Laser Deposition for Lithium-Ion Batteries.

Nanocrystalline Fe2 O3 thin films are deposited directly on the conduct substrates by pulsed laser deposition as anode materials for lithium-ion batteries. We demonstrate the well-designed Fe2 O3 film electrodes are capable of excellent high-rate performance (510 mAh g- 1 at high current density of 15,000 mA g- 1 ) and superior cycling stability (905 mAh g- 1 at 100 mA g- 1 after 200 cycles), which are among the best reported state-of-the-art Fe2 O3 anode materials. The outstanding lithium storage performances of the as-synthesized nanocrystalline Fe2 O3 film are attributed to the advanced nanostructured architecture, which not only provides fast kinetics by the shortened lithium-ion diffusion lengths but also prolongs cycling life by preventing nanosized Fe2 O3 particle agglomeration. The electrochemical performance results suggest that this novel Fe2 O3 thin film is a promising anode material for all-solid-state thin film batteries.