【摘 要】
：
The aqueous rechargeable Zn-ion batteries based on the safe,low cost and environmental benignity aque-ous electrolytes are one of the most compelling candidates
【机 构】
：
State Key Laboratory of Separation Membranes and Membrane Processes,National Center for Internationa
论文部分内容阅读
The aqueous rechargeable Zn-ion batteries based on the safe,low cost and environmental benignity aque-ous electrolytes are one of the most compelling candidates for large scale energy storage applications.However,pursuing suitable insertion materials may be a great challenge due to the strong electrostatic interaction between Zn2+and cathode materials.Hence,a novel NaV6O15/V2O5 skin-core heterostructure nanowire is reported via a one-step hydrothermal method and subsequent calcination for high-stable aqueous Zn-ion batteries(ZIBs).The NaV6O15/V2O5 cathode delivers high specific capacity of 390 mAh/g at 0.3 A/g and outstanding cycling stability of 267 mAh/g at 5 A/g with high capacity retention over 92.3％after 3000 cycles.The superior electrochemical performances are attributed to the synergistic effect of skin-core heterostructured NaV6O15/V2O5,in which the sheath of NaV6O15 possesses high stabil-ity and conductivity,and the V2O5 endows high specific capacity.Besides,the heterojunction structure not only accelerates intercalation kinetics of Zn2+transport but also further consolidates the stability of the layers of V2O5 during the cyclic process.This work provides a new perspective in developing feasible insertion materials for rechargeable aqueous ZIBs.
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