首页|Harnessing eco-friendly additives to manipulate zinc-ion solvation structures towards stable zinc metal batteries

Harnessing eco-friendly additives to manipulate zinc-ion solvation structures towards stable zinc metal batteries

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Considerable research efforts have been dedicated to investigating the side reactions and the growth of Zn dendritic in aqueous zinc-ion batteries(AZIBs).The incorporation of organic solvents as additives in electrolytes has yielded highly promising results.Nevertheless,their pervasive use has been hindered by concerns regarding their toxicity,flammability,and economic viability.Herein,we propose the utiliza-tion of γ-valerolactone(γ-V),a novel eco-friendly solvent,as an alternative for conventional organic additives to improve the performance of Zn anode.Experimental investigations and theoretical analyses have verified that γ-V additives can diminish the Zn2+-desolvation energy and enhance Zn2+transport kinetics.The adsorbed y-V molecules modulate the nucleation and diffusion of Zn2+,facilitating Zn growth along the(002)crystal plane,thus inhibiting dendrite formation and side reactions.Consequently,the modified electrolyte with 3％γ-V exhibit highly reversible cycling for 2800 h at 1 mA cm-2 and 1 mA h cm-2 in Zn//Zn symmetric cell.The Zn//KVOH coin cells deliver a capacity reten-tion of 74.7％after 1000 cycles at 5 A g-1.The Zn//KVOH pouch cells maintain a capacity retention of 78.7％over 90 cycles at 3 A g-1.Notably,the γ-V additives also effectively alleviate the self-discharge phe-nomenon.This work provides valuable insights on the development of aqueous zinc-ion batteries with superior safety through the modulation of electrolytes using eco-friendly additives.

Aqueous zinc-ion batteriesEco-friendly electrolyte additiveγ-ValerolactoneZn anodeRenewable energy storage

Lingmei Wang、Hao Shen、Wuzhu Sun、Tianle Zheng、Hongwei Li、Jicheng Yan、Lemeng Ding、Zhongti Sun、Jingyu Sun、Chao Li

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School of Materials Science and Engineering,Shandong University of Technology,Zibo 255000,Shandong,China

School of Materials Science and Engineering,Jiangsu University,Zhenjiang 212013,Jiangsu,China

Department of Chemistry,College of Sciences,Shanghai University,Shanghai 200444,China

College of Energy,Soochow University,Suzhou 215006,Jiangsu,China

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2024

10.1016/j.jechem.2024.06.029

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)：2024.98(11)