首页|Temperature inversion enables superior stability for low-temperature Zn-ion batteries

Temperature inversion enables superior stability for low-temperature Zn-ion batteries

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It is challenging for aqueous Zn-ion batteries(ZIBs)to achieve comparable low-temperature(low-T)per-formance due to the easy-frozen electrolyte and severe Zn dendrites.Herein,an aqueous electrolyte with a low freezing point and high ionic conductivity is proposed.Combined with molecular dynamics simu-lation and multi-scale interface analysis(time of flight secondary ion mass spectrometry three-dimensional mapping and in-situ electrochemical impedance spectroscopy method),the temperature independence of the V2O5 cathode and Zn anode is observed to be opposite.Surprisingly,dominated by the solvent structure of the designed electrolyte at low temperatures,vanadium dissolution/shuttle is significantly inhibited,and the zinc dendrites caused by this electrochemical crosstalk are greatly relieved,thus showing an abnormal temperature inversion effect.Through the disclosure and improve-ment of the above phenomena,the designed Zn||V2O5 full cell delivers superior low-T performance,main-taining almost 99％capacity retention after 9500 cycles(working more than 2500 h)at-20 ℃.This work proposes a kind of electrolyte suitable for low-T ZIBs and reveals the inverse temperature dependence of the Zn anode,which might offer a novel perspective for the investigation of low-T aqueous battery systems.

Aqueous Zn-ion batteriesLow-temperature performanceOpposite temperature dependenceZn dendrite growthVanadium dissolution

Fu-Da Yu、Zhe-Jian Yi、Rui-Yang Li、Wei-Hao Lin、Jie Chen、Xiao-Yue Chen、Yi-Ming Xie、Ji-Huai Wu、Zhang Lan、Lan-Fang Que、Bao-Sheng Liu、Hao Luo、Zhen-Bo Wang

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Engineering Research Center of Environment-Friendly Functional Materials,Ministry of Education,Institute of Materials Physical Chemistry,Huaqiao University,Xiamen 361021,Fujian,China

School of Electronic Engineering,Guangxi University of Science and Technology,Liuzhou 545006,Guangxi,China

School of Materials Science and Engineering,Xiamen University of Technology,Xiamen 361024,Fujian,China

School of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,Henan,China

MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage,State Key Laboratory of Space Power-Sources,School of Chemistry and Chemical Engineering,Harbin Institute of Technology,Harbin 150001,Heilongjiang,China

College of Materials Science and Engineering,Shenzhen University,Shenzhen 518071,Guangdong,China

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国家自然科学基金Natural Science Foundation of Xiamen,China中国博士后科学基金

523721913502Z2023720362022TQ0282

2024

10.1016/j.jechem.2023.12.019

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)：2024.91(4)
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