Aqueous zinc ion batteries have received widespread attention.However,the growth of zinc dendrites and hydrogen evolution reaction generation seriously hinder the practical application of zinc ion bat-teries.Herein,it...Aqueous zinc ion batteries have received widespread attention.However,the growth of zinc dendrites and hydrogen evolution reaction generation seriously hinder the practical application of zinc ion bat-teries.Herein,it is reported that a multifunctional dendrites-free low-temperature PVA-based gel elec-trolyte by introducing negatively charged polymer carbon quantum dots(QDs)and the organic antifreeze dimethyl sulfoxide(DMSO)into it.The QDs carrying a large number of functional groups on the surface can effectively adsorb Zn^(2+),eliminating the“tip effect”,and inducing the uniform deposition of Zn^(2+)and the formation of a dendrites-free structure.Meanwhile,the solvation structure of adsorbed Zn^(2+)can be controlled by charged groups to reduce the generation of side reactions,thus obtaining high-performance zinc ion batteries.The Zn/polyaniline(PANi)full battery can be stably cycled more than 1000 times at-20℃,and the design of this gel electrolyte can provide good feasibility for safe,stable,and flexible energy storage devices.展开更多
基金supported by the National Natural Science Foundation of China Project(No.52163001)the Guizhou Minzu University Research Platform Grant(No.GZMUGCZX[2021]01)+2 种基金the Guizhou Provincial Science and Technology Program Project Grant(Qiankehe Platform Talents-CXTD[2021]005,Qiankehe Platform Talents-GCC[2022]010-1,Qiankehe Fuqi[2023]001)the Central Guided Local Science and Technology Development Funds Project(Qiankehe Zhong Yindi[2023]035)the Doctor Startup Fund of Guizhou Minzu University(Grant No.GZMUZK[2024]QD77).
文摘Aqueous zinc ion batteries have received widespread attention.However,the growth of zinc dendrites and hydrogen evolution reaction generation seriously hinder the practical application of zinc ion bat-teries.Herein,it is reported that a multifunctional dendrites-free low-temperature PVA-based gel elec-trolyte by introducing negatively charged polymer carbon quantum dots(QDs)and the organic antifreeze dimethyl sulfoxide(DMSO)into it.The QDs carrying a large number of functional groups on the surface can effectively adsorb Zn^(2+),eliminating the“tip effect”,and inducing the uniform deposition of Zn^(2+)and the formation of a dendrites-free structure.Meanwhile,the solvation structure of adsorbed Zn^(2+)can be controlled by charged groups to reduce the generation of side reactions,thus obtaining high-performance zinc ion batteries.The Zn/polyaniline(PANi)full battery can be stably cycled more than 1000 times at-20℃,and the design of this gel electrolyte can provide good feasibility for safe,stable,and flexible energy storage devices.
