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

作　　者：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 

机构地区：[1]Engineering Research Center of Environment-Friendly Functional Materials,Ministry of Education,Institute of Materials Physical Chemistry,Huaqiao University,Xiamen 361021,Fujian,China [2]b2 School of Electronic Engineering,Guangxi University of Science and Technology,Liuzhou 545006,Guangxi,China [3]School of Materials Science and Engineering,Xiamen University of Technology,Xiamen 361024,Fujian,China [4]School of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,Henan,China [5]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 [6]College of Materials Science and Engineering,Shenzhen University,Shenzhen 518071,Guangdong,China

出　　处：《Journal of Energy Chemistry》2024年第4期245-253,共9页能源化学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(52372191);the Natural Science Foundation of Xiamen,China(3502Z202372036);the China Postdoctoral Science Foundation(2022TQ0282);the support of the High-Performance Computing Center(HPCC)at Harbin Institute of Technology on first-principles calculations。

摘　　要：It is challenging for aqueous Zn-ion batteries(ZIBs)to achieve comparable low-temperature(low-T)performance 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 simulation and multi-scale interface analysis(time of flight secondary ion mass spectrometry threedimensional mapping and in-situ electrochemical impedance spectroscopy method),the temperature independence of the V_(2)O_(5)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 improvement of the above phenomena,the designed Zn||V_(2)O_(5)full cell delivers superior low-T performance,maintaining almost 99%capacity retention after 9500 cycles(working more than 2500 h)at-20°C.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.

关 键 词：Aqueous Zn-ion batteries Low-temperature performance Opposite temperature dependence Zndendrite growth Vanadium dissolution 

分 类 号：TM912[电气工程—电力电子与电力传动] O646[理学—物理化学]