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Title: Stable zinc anodes enabled by a zincophilic polyanionic hydrogel layer
Authors: Yang, Jin-Lin
Li, Jia
Zhao, Jian-Wei
Liu, Kang
Yang, Peihua
Fan, Hong Jin
Keywords: Engineering::Materials::Energy materials
Issue Date: 2022
Source: Yang, J., Li, J., Zhao, J., Liu, K., Yang, P. & Fan, H. J. (2022). Stable zinc anodes enabled by a zincophilic polyanionic hydrogel layer. Advanced Materials.
Project: T2EP50121-001
Journal: Advanced Materials
Abstract: The practical application of the Zn-metal anode for aqueous batteries is greatly restricted by catastrophic dendrite growth, intricate hydrogen evolution, and parasitic surface passivation. Herein, a polyanionic hydrogel film is introduced as a protective layer on the Zn anode with the assistance of a silane coupling agent (denoted as Zn-SHn). The hydrogel framework with zincophilic -SO3 - functional groups uniformizes the zinc ions flux and transport. Furthermore, such a hydrogel layer chemically bonded on the Zn surface possesses an anti-catalysis effect, which effectively suppresses both the hydrogen evolution reaction and formation of Zn dendrites. As a result, stable and reversible Zn stripping/plating at various currents and capacities is achieved. A full cell by pairing the Zn-SHn anode with a NaV3 O8 ·1.5 H2 O cathode shows a capacity of around 176 mAh g-1 with a retention around 67% over 4000 cycles at 10 A g-1 . This polyanionic hydrogel film protection strategy paves a new way for future Zn-anode design and safe aqueous batteries construction.
ISSN: 0935-9648
DOI: 10.1002/adma.202202382
Schools: School of Physical and Mathematical Sciences 
Research Centres: Rolls-Royce@NTU Corporate Lab 
Rights: This is the peer reviewed version of the following article: Yang, J., Li, J., Zhao, J., Liu, K., Yang, P. & Fan, H. J. (2022). Stable zinc anodes enabled by a zincophilic polyanionic hydrogel layer. Advanced Materials, which has been published in final form at This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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