Restraining growth of Zn dendrites by poly dimethyl diallyl ammonium cations in aqueous electrolytes

Xiang-Xin Zhang ¹Yuan-Qiang Chen ¹Chang-Xin Lin ¹Yuan-Sheng Lin ¹Guo-Lin Hu ¹Yong-Chuan Liu ¹Xi-Lai Xue ²Su-Jing Chen ¹Zhan-Lin Yang ³Bai-Sheng Sa ³Yi-Ning Zhang¹

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作者信息

1. Key Laboratory of Optoelectronic Materials Chemistry and Physics,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China
2. Helmholtz Institute Ulm(HIU),89081 Ulm,Germany;Karlsruhe Institute of Technology(KIT),76021 Karlsruhe,Germany
3. College of Materials Science and Engineering,Fuzhou University,Fuzhou 350108,China
折叠

Abstract

Metallic zinc is an excellent anode material for Zn-ion batteries,but the growth of Zn dendrite severely hinders its practical application.Herein,an efficient and economical cationic additive,poly dimethyl diallyl ammonium(PDDA)was reported,used in aqueous Zn-ion batteries electrolyte for stabilizing Zn anode.The growth of zinc dendrites can be significantly restrained by bene-fiting from the pronounced electrostatic shielding effect from PDDA on the Zn metal surface.Moreover,the PDDA is preferentially absorbed on Zn(002)plane,thus pre-venting unwanted side reactions on Zn anode.Owing to the introduction of a certain amount of PDDA additive into the common ZnSO4-based electrolyte,the cycle life of assembled Zn||Zn cells(1 mA·cmr-2 and 1 mAh·cm-2)is prolonged to more than 1100 h.In response to the perfo-ration issue of Zn electrodes caused by PDDA additives,the problem can be solved by combining foamy copper with zinc foil.For real application,Zn-ion hybrid super-capacitors and MnO2||Zn cells were assembled,which exhibited excellent cycling stability with PDDA additives.This work provides a new solution and perspective to cope with the dendrite growth problem of Zn anode.

Key words

PDDA/Electrostatic shielding effect/Zn anode/Zn dendrites

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基金项目

Fuzhou science and technology project(2021-ZD-213)

Fuzhou science and technology project(2020-Z-6)

Fujian Provincial Department of Science and Technology(2021T3036)

Fujian Provincial Department of Science and Technology(2020T3004)

Fujian Provincial Department of Science and Technology(2020T3030)

Fujian Provincial Department of Science and Technology(2020H0040)

STS Science And Technology Project of the Chinese Academy of Sciences(KFJ-STS-QYZD-2021-09-001)

Quanzhou Science and Technology Project(2020G17)

Joint Fund of the Yulin University and the Dalian National Laboratory for Clean Energy(2021009)

出版年

2024

稀有金属(英文版)

中国有色金属学会

稀有金属(英文版)

CSTPCDEI

影响因子：0.801

ISSN：1001-0521

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