Steel Anti‐Corrosion Strategy Enables Long‐Cycle Zn Anode

The progress of aqueous zinc batteries (AZBs) is limited by the poor cycling life due to Zn anode instability, including dendrite growth, surface corrosion, and passivation. Inspired by the anti‐corrosion strategy of steel industry, a compounding corrosion inhibitor (CCI) is employed as the electrol...

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Bibliographic Details
Published in:Advanced energy materials 2023-01, Vol.13 (1), p.n/a
Main Authors: Tian, Han, Yang, Jin‐Lin, Deng, Yirui, Tang, Wenhao, Liu, Ruiping, Xu, Chenyang, Han, Peng, Fan, Hong Jin
Format: Article
Language:English
Subjects:
Adhesive strength
Anodic protection
aqueous Zn‐ion batteries
Bonding strength
compounding corrosion inhibitors
Corrosion
Corrosion inhibitors
Decay rate
dendrites suppression
Dendritic structure
Deposition
Electrolytes
Electrolytic cells
Iron and steel industry
Manganese dioxide
organic solid‐electrolyte interphase
Surface stability
Zinc
Zn metal anodes
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Summary:The progress of aqueous zinc batteries (AZBs) is limited by the poor cycling life due to Zn anode instability, including dendrite growth, surface corrosion, and passivation. Inspired by the anti‐corrosion strategy of steel industry, a compounding corrosion inhibitor (CCI) is employed as the electrolyte additive for Zn metal anode protection. It is shown that CCI can spontaneously generate a uniform and ≈30 nm thick solid‐electrolyte interphase (SEI) layer on Zn anode with a strong adhesion via ZnO bonding. This SEI layer efficiently prohibits water corrosion and guides homogeneous Zn deposition without obvious dendrite formation. This enables reversible Zn deposition and dissolution for over 1100 h under the condition of 1 mA cm−2 and 1 mAh cm−2 in symmetric cells. The Zn‐MnO2 full cells with CCI‐modified electrolyte deliver an ultralow capacity decay rate (0.013% per cycle) at 0.5 A g−1 over 1000 cycles. Such an innovative strategy paves a low‐cost way to achieve AZBs with long lifespan. Inspired by the industrial steel pipeline protection, a compounding corrosion inhibitor (CCI) has been employed as the electrolyte additive for aqueous Zn metal anodes. The spontaneous deposition of CCI on Zn surface constructs a uniform organic layer which provides Zn2+ conduction and H2O repulsion. A strong adhesion between Zn and CCI leads to a dendrites‐free Zn electrodeposition and long cycling life of the aqueous Zn‐ion battery.
ISSN:1614-6832
1614-6840
DOI:10.1002/aenm.202202603