Topotactically synthesized ultralong LiVsub3/subOsub8/sub nanowire cathode materials for high-rate and long-life rechargeable lithium batteries

摘要

High-power applications at fast charge and discharge rates are still great challenges in the development of rechargeable lithium batteries. Here, we demonstrate that ultralong LiV3O8 nanowire cathode materials synthesized by topotactic Li intercalation present excellent high-rate and long-life performance. At the current density of 2000, mA g−1, the initial and the six-hundredth discharge capacities can reach 137 and 120 mAh g−1, respectively, corresponding to a capacity fading of only 0.022% per cycle. Such performance indicates that the topotactically synthesized ultralong LiV3O8 nanowires are promising cathode materials for high-rate and long-life rechargeable lithium batteries.