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Revolutionizing aqueous Zn-ion batteries: Precision control of H2O activity and Zn deposition through ammonium oxalate additive
Citation
Ding, W., Zhou, G., Guo, X., Liu, C., Wang, T., Fu, Y., Yin, J., Zhang, L., & Ang, E. H. (2024). Revolutionizing aqueous Zn-ion batteries: Precision control of H2O activity and Zn deposition through ammonium oxalate additive. Chemical Engineering Journal, 481, Article 148544. https://doi.org/10.1016/j.cej.2024.148544
Author
Ding, Wenhao
•
Zhou, Guolang
•
Guo, Xiangjie
•
Liu, Cheng
•
Wang, Tianshi
•
Fu, Yongsheng
•
Yin, Jingzhou
•
Zhang, Lili
•
Abstract
The natural reactivity of Zn metal in aqueous environments leads to surface deterioration and uncontrolled dendrite growth, posing challenges in the advancement of Zn-ion batteries. In this research, we introduce an environmentally friendly and cost-effective electrolyte additive, ammonium oxalate (AO), to significantly extend the cycle life of Zn-ion batteries with minimal usage. Oxalate ions within AO actively participate in the solvation of hydrated Zn ions and attach to the Zn anode surface prior to H2O molecules, creating a robust solid-electrolyte interface (SEI) layer. This SEI layer serves a dual purpose: it inhibits further reactions with H2O and restricts the two-dimensional movement of Zn ions, promoting the preferential growth of the (0 0 2) crystal plane. Consequently, Zn
Zn cells exhibit an impressive lifespan surpassing 1800 h (at 1 mA cm−2, 1 mAh cm−2), and Zn
Cu cells experience a tenfold increase in cycling life. Moreover, Zn
MnO2 full cells, incorporating this low-cost and highly efficient inorganic additive, maintain an outstanding 80.84 % capacity retention after 1200 cycles at 1 A g−1. This breakthrough with AO offers a promising avenue for the practical implementation of Zn-ion batteries, emphasizing their cost-effectiveness and environmental sustainability.
Date Issued
2024
Publisher
Elsevier
Journal
Chemical Engineering Journal
DOI
10.1016/j.cej.2024.148544
Project
RI 1/21 EAH
Grant ID
BE2020772
52102250
BK20210951
Funding Agency
Jiangsu Key Research and Development Project
National Natural Science Foundation of China
Natural Science Foundation of Jiangsu Province
National Institute of Education, Singapore