Amphoteric Cellulose-Based Double-Network Hydrogel Electrolyte Toward Ultra-Stable Zn Anode

被引:137
作者
Zhang, Haodong [1 ]
Gan, Xiaotang [2 ]
Song, Zhiping [2 ]
Zhou, Jinping [1 ]
机构
[1] Wuhan Univ, Coll Chem & Mol Sci, Hubei Engn Ctr Nat Polymers Based Med Mat, Key Lab Biomed Polymers,Minist Educ, Wuhan 430072, Peoples R China
[2] Wuhan Univ, Coll Chem & Mol Sci, Hubei Key Lab Electrochem Power Sources, Wuhan 430072, Peoples R China
基金
中国国家自然科学基金;
关键词
Amphoteric Cellulose; Aqueous Rechargeable Zinc Batteries; Double-Network; Hydrogel Electrolyte; Zn Anode;
D O I
10.1002/anie.202217833
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Zinc (Zn) metal anode suffers from uncontrollable Zn dendrites and parasitic side reactions at the interface, which restrict the practical application of aqueous rechargeable zinc batteries (ARZBs). Herein, an amphoteric cellulose-based double-network is introduced as hydrogel electrolyte to overcome these obstacles. On one hand, the amphoteric groups build anion/cation transport channels to regulate electro-deposition behavior on Zn (002) crystal plane enabled by homogenizing Zn2+ ions flux. On the other hand, the strong bonding between negatively charged carboxyl groups and Zn2+ ions promote the desolvation process of [Zn(H2O)(6)](2+) to eliminate side reactions. Based on the above two functions, the hydrogel electrolyte enables an ultra-stable cycling with a cumulative capacity of 7 Ah cm(-2) at 20 mA cm(-2)/20 mAh cm(-2) for Zn||Zn cell. This work provides significant concepts for developing hydrogel electrolytes to realize stable anode for high-performance ARZBs.
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页数:10
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