首页|Regulating the inner Helmholtz plane structure at the electrolyte-electrode interface for highly reversible aqueous Zn batteries

Regulating the inner Helmholtz plane structure at the electrolyte-electrode interface for highly reversible aqueous Zn batteries

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The development of aqueous Zn batteries is limited by parasitic water reactions,corrosion,and dendrite growth.To address these challenges,an inner Helmholtz plane(IHP)regulation method is proposed by employing low-cost,non-toxic maltitol as the electrolyte additive.The preferential adsorption behavior of maltitol can expel the water from the inner Helmholtz plane,and thus hinder the immediate contact between Zn metal and H2O.Meanwhile,strong interaction between maltitol and H2O molecules can restrain the activity of H2O.Besides,the"IHP adsorption effect"along with the low LUMO energy level of maltitol-CF3SO3 can promote the in-situ formation of an organic-inorganic complex solid electrolyte interface(SEI)layer.As a result,the hydrogen/oxygen evolution side reaction,corrosion,and dendrites issues are effectively suppressed,thereby leading to highly reversible and dendrite-free Zn plating/strip-ping.The Zn||I2 battery with hybrid electrolytes also demonstrates high electrochemical performance and ultralong cycling stability,showing a capacity retention of 75％over 20000 charge-discharge cycles at a large current density of 5 A g-1.In addition,the capacity of the device has almost no obvious decay over 20000 cycles even at-30 ℃.This work offers a successful electrolyte regulation strategy via the IHP adsorption effect to design electrolytes for high-performance rechargeable Zn-ion batteries.

Inner Helmholtz planeAdsorption effectDendrite suppressionSEI layerZn||I2 battery

Jianghe Liu、Sanlue Hu、Hexin Guo、Guobin Zhang、Wen Liu、Jianwei Zhao、Shenhua Song、Cuiping Han、Baohua Li

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Shenzhen Key Laboratory on Power Battery Safety and Shenzhen Geim Graphene Center,Tsinghua Shenzhen International Graduate School,Tsinghua University,Shenzhen 518055,Guangdong,China

Shenzhen Key Laboratory of Advanced Materials,School of Materials Science and Engineering,Harbin Institute of Technology,Shenzhen 518055,Guangdong,China

Faculty of Materials Science and Energy Engineering/Institute of Technology for Carbon Neutrality,Shenzhen Institute of Advanced Technology,Chinese Academy of Sciences,Shenzhen 518055,Guangdong,China

Shenzhen HUASUAN Technology Co.,Ltd.,Shenzhen 518055,Guangdong,China

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National Natural Science Foundation of ChinaShenzhen Science and Technology Innovation CommissionShenzhen Science and Technology ProgramTesting Technology Center of Materials and Devices,Tsinghua Shenzhen International Graduate School

52261160384RCYX20221008092934093KJZD20230923114107014

2024

10.1016/j.jechem.2024.03.032

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.95(8)