|
|||||
|
|
Amphoteric Cellulose-Based Double-Network Hydrogel Electrolyte Toward Ultra-Stable Zn Anode |
|
| Authors: | Haodong Zhang Xiaotang Gan Prof Zhiping Song Prof Jinping Zhou |
| Institution: | 1. Hubei Engineering Center of Natural Polymers-based Medical Materials, Key Laboratory of Biomedical Polymers of Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072 China
These authors contributed equally to this work.;2. Hubei Key Laboratory of Electrochemical Power Sources, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072 China These authors contributed equally to this work.;3. Hubei Key Laboratory of Electrochemical Power Sources, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072 China;4. Hubei Engineering Center of Natural Polymers-based Medical Materials, Key Laboratory of Biomedical Polymers of Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072 China |
| Abstract: | 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. |
| Keywords: | Amphoteric Cellulose Aqueous Rechargeable Zinc Batteries Double-Network Hydrogel Electrolyte Zn Anode |