Developing WO₃ as high-performance anode material for lithium-ion batteries

Herein, we report on the development of WO₃/C hybrid as an anode for lithium-ion batteries. The conductivity and stability of WO₃ electrode are boosted by hybrid carbon; the ion transfer length can be reduced by the small size of active material. These effects endow the resultant anode exhibiting favorable lithium storage properties in term of high efficiency, robust cycling stability and high rate capability. Resultantly, the reversible capacities of 833.4 and 528.3 mAh g⁻¹ could be delivered after 100 discharge/charge cycles at 100 mA g⁻¹ and 1300 deep discharge/charge cycles at 500 mA g⁻¹, respectively. Such a performance is superior to those of the previously reported WO₃-based materials. Considering the simplification of the fabrication process and the outstanding performance, the WO₃/C hybrid is deemed to be a promising anode material substituting for commercial graphite.