Kinetics‐Boosted Effect Enabled by Zwitterionic Hydrogel Electrolyte for Highly Reversible Zinc Anode in Zinc‐Ion Hybrid Micro‐Supercapacitors

Advanced Energy Materials, Journal Year: 2022, Volume and Issue: 12(40)

Published: Aug. 25, 2022

Abstract Despite impressive merits of complementary charge‐storage mechanisms for aqueous Zn‐ion hybrid micro‐supercapacitors (ZHMSCs), it remains a challenge to solve dendrite and parasitic reactions issues Zn anodes. Herein, kinetics‐boosted strategy 2+ transport desolvation hydrated is proposed by engineering zwitterionic P(AM‐ co ‐SBMA) hydrogel electrolyte (PASHE) highly reversible plating/stripping. Mechanically robust chemically anchored PASHE features groups constructing ion migration channels immobilizing water molecules, which accelerates an ultrahigh transfer number (0.84) alleviates water‐related reactions. Theoretical calculations combined with experimental results reveal that sulfobetaine sulfonate anions endow improved kinetics the ability coordinate flux electric field distributions at electrolyte–electrode interface. Thus, anodes exhibit excellent electrochemical performance involving high average coulombic efficiency 99.4% in Zn|PASHE|Cu cell as well cumulative capacity 2000 mAh cm −2 (20 mA , 1 ) depth discharge 80.9% 10 Zn|PASHE|Zn cells. Furthermore, ZHMSCs based on deliver flexibility cyclability energy‐storage applications. This work provides useful insights developing high‐performance derived devices.

Language: Английский

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

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(13)

Published: Feb. 1, 2023

Zinc (Zn) metal anode suffers from uncontrollable Zn dendrites and parasitic side reactions at the interface, which restrict 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, groups build anion/cation transport channels regulate electro-deposition behavior on (002) crystal plane enabled by homogenizing Zn2+ ions flux. other strong bonding between negatively charged carboxyl promote desolvation process [Zn(H2 O)6 ]2+ eliminate reactions. Based above two functions, enables ultra-stable cycling with a cumulative capacity 7 Ah cm-2 20 mA /20 mAh for Zn||Zn cell. This work provides significant concepts developing electrolytes realize stable high-performance ARZBs.

Language: Английский

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Design Strategies toward High‐Performance Zn Metal Anode

Small Methods, Journal Year: 2023, Volume and Issue: 8(6)

Published: Feb. 25, 2023

Abstract Rechargeable aqueous Zn‐ion batteries (AZIBs) are one of the most promising alternatives for traditional energy‐storage devices because their low cost, abundant resources, environmental friendliness, and inherent safety. However, several detrimental issues with Zn metal anodes including dendrite formation, hydrogen evolution, corrosion passivation, should be considered when designing advanced AZIBs. Moreover, these thorny not independent but mutually reinforcing, covering many technical processing parameters. Therefore, it is necessary to comprehensively summarize facing corresponding strategies develop roadmaps development high‐performance anodes. Herein, failure mechanisms impacts outlined. Recent progress on improving stability anode summarized, structurally designed anodes, alloy surface modification, electrolyte optimization, separator design. Finally, this review provides brilliant insightful perspectives stable promotes large‐scale application AZIBs in power grid systems.

Language: Английский

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Construction of Mixed Ionic‐Electronic Conducting Scaffolds in Zn Powder: A Scalable Route to Dendrite‐Free and Flexible Zn Anodes

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(19)

Published: March 8, 2022

Zn powder (Zn-P)-based anodes are considered ideal candidates for Zn-based batteries because they enable a positive synergistic integration of safety and energy density. However, Zn-P-based still experience easy corrosion, uncontrolled dendrite growth, poor mechanical strength, which restrict their further application. Herein, mixed ionic-electronic conducting scaffold is introduced into Zn-P to successfully fabricate anti-corrosive, flexible, dendrite-free using scalable tape-casting strategy. The as-established characterized by robust flexibility, facile scale-up synthesis methodology, exceptional anti-corrosive characteristics, it can effectively homogenize the Zn2+ flux during plating/stripping, thus allowing stable cycling. Benefiting from these comprehensive attributes, as-prepared anode provides superior electrochemical performance, including long-life cycling stability high rate capability in practical coin flexible pouch cells; thus, holds great potential developing advanced Zn-ion batteries. findings this study provide insights promising pathway highly efficient reliable will aid realization energy-storage devices.

Language: Английский

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Ionic liquid additive enabling anti-freezing aqueous electrolyte and dendrite-free Zn metal electrode with organic/inorganic hybrid solid electrolyte interphase layer

Energy storage materials, Journal Year: 2022, Volume and Issue: 53, P. 629 - 637

Published: Oct. 6, 2022

Language: Английский

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