Ultrastable Zinc Anode by Simultaneously Manipulating Solvation Sheath and Inducing Oriented Deposition with PEG Stability Promoter

被引：73

作者：

Cao, Ziyi ^{[1
,2
]}

Zhu, Xiaodong ^{[1
,3
]}

Gao, Shangpeng ^{[3
]}

Xu, Dongxiao ^{[1
,2
]}

Wang, Zengyao ^{[1
,2
]}

Ye, Zhuolin ^{[1
,2
]}

Wang, Lipeng ^{[1
,2
]}

Chen, Bin ^{[1
,2
]}

Li, Lei ^{[4
]}

Ye, Mingxin ^{[1
]}

Shen, Jianfeng ^{[1
]}

机构：

[1] Fudan Univ, Inst Special Mat & Technol, Shanghai 200433, Peoples R China

[2] Fudan Univ, Dept Chem, Shanghai 200433, Peoples R China

[3] Fudan Univ, Dept Mat Sci, Shanghai 200433, Peoples R China

[4] Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China

来源：

SMALL | 2022年 / 18卷 / 06期

基金：

中国国家自然科学基金;

关键词：

dendrites; electrolyte additives; oriented deposition; solvation sheaths; zinc anodes; LONG-LIFE; ELECTROLYTE; ZN; ADDITIVES; KINETICS; GROWTH;

D O I：

10.1002/smll.202103345

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Aqueous zinc-ion batteries are a low-cost and safe energy storage system, but suffer from detrimental side reactions and Zn dendrites due to the strong interactions between Zn2+ and water molecules in the electrolytes, and random Zn2+ deposition on the anode surface. Here, an electrolyte involving a dual-functional additive of polyethylene glycol (PEG) to bypass these issues is reported. The electrolyte can not only tailor the solvation sheath of Zn2+ but also enable favorably oriented deposition of Zn2+ on the anode surface. The dendrite-free Zn anode in Zn//Zn cells is obtained with high Columbic efficiency (98.8%) and long cycling lifespan (1500 h), six times longer than that of electrolyte without PEG at 0.25 mA cm(-2). What is more, the excellent cycling stability of the prepared batteries (Zn//V2O5 center dot 1.6 H2O) suggests that the developed tailoring strategy may propel a promising pathway for stabilizing Zn metal anodes.

引用

页数：8

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