Abstract
As one of the most promising cathodes for rechargeable Lithium ion battery, LiV3O8 commonly suffers from inevitably complicated phase transitions and sluggish kinetics. Here, we develop a Ca doping technique totackle this long-standing issue of instability and improve the rate performance of LiV3O8. The dopants are found to reside in the Li site ofLiV3O8, where works as a pillar to increase the a axis distance facilitating Li diffusion, stabilizing the structure and suppressing the phase transition during cycling. This doped LiV3O8 displays an exceptionally high capacity of 280 mAh g-1, cyclability with 87% capacity retention over 100 cycles and significantly enhanced rate capability.
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