Optimizing Molecular Weight of Polyethylene Glycol as an Additive for Stabilizing Zn Metal Anode in Aqueous Electrolyte
- Authors
- Kwon, Ohhyun; Kang, Jihyeon; Jang, Seohyeon; Eom, Hojong; Choi, Seyoung; Shin, Junhyeop; Park, Jongkwon; Seo, Hyeonjong; Kim, Jae Hyun; Park, Soomin; Nam, Inho
- Issue Date
- Feb-2024
- Publisher
- Springer
- Keywords
- Aqueous Zn ion batteries; Aqueous ZIBs; Metal dendrite; Polyethylene glycol addictive; PEG addictive; Surface corrosion; Zn metal anode
- Citation
- Korean Journal of Chemical Engineering, v.41, no.2, pp 539 - 544
- Pages
- 6
- Journal Title
- Korean Journal of Chemical Engineering
- Volume
- 41
- Number
- 2
- Start Page
- 539
- End Page
- 544
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/72943
- DOI
- 10.1007/s11814-024-00117-1
- ISSN
- 0256-1115
1975-7220
- Abstract
- Polyethylene glycol (PEG) additives have attracted significant attention as a cost-effective approach for modifying the deposition behavior of Zinc (Zn) anodes. In this study, we investigated the effectiveness of PEG additives in 1 M ZnSO4 aqueous electrolytes, specifically examining the effect of PEG molecular weight on Zn deposition. By exploring the adsorption of PEG polymers with different molecular weights, we identified the PEG with a molecular weight of 300 g mol−1 (PEG300) as the most suitable polymer. In terms of electrochemical performance, Zn anodes exhibited steady cycling for 232 cycles with high reversibility in 1 M ZnSO4 electrolyte with 0.1 wt.% PEG300. By contrast, Zn anodes using the control electrolyte of 1 M ZnSO4 began to fail after only 70 cycles. These findings highlight the potential of PEG300 as a simple and adaptable additive for significantly extending the longevity of Zn metal anodes. © The Author(s), under exclusive licence to Korean Institute of Chemical Engineers, Seoul, Korea 2024.
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