水性锌离子电池成本低、安全性高,是一种有潜力的新型储能系统。然而,锌金属阳极表面不受控制的枝晶生长和严重的副反应对其实际应用构成了重大挑战。有机溶剂N,N-二甲基甲酰胺(DMF)具有适宜的沸点、介电常数、极化率和黏度,综合性能优异。将DMF与硫酸锌水溶液按照一定比例混合配制电解液,以五氧化二钒(V2O5)为正极,金属锌为负极,组装了水性锌离子电池,并研究了其电化学性能。结果表明,DMF的加入有利于抑制副反应的发生,当硫酸锌水溶液与DMF体积比为3∶1时,电池的倍率性能最好。
Aqueous zinc-ion battery is a potential energy storage system due to its low cost and high safety.However,the uncontrolled dendrite growth on the surface of zinc metal anode and serious side reactions pose great challenges to its practical application.The organic solvent N,N-dimethylformamide (DMF) has excellent comprehensive physical properties such as appropriate boiling point,dielectric constant,polarizability and viscosity.In this paper,an aqueous zinc-ion battery was assembled using an electrolyte prepared by mixing DMF with zinc sulfate aqueous solution at a specific ratio,featuring vanadium pentoxide (V2O5) as the cathode and metallic zinc as the anode.Its electrochemical performance was investigated.The results indicated that the addition of DMF was beneficial to inhibit the occurrence of side reactions,and the rate performance of the battery achieved the best when the volume ratio of zinc sulfate aqueous solution to DMF was 3∶1.
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基金资助
国家自然科学基金(51273027);2022年江苏省研究生科研与实践创新计划(KYCX22＿3095)
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