| Autor: |
Lingyun Xiong, Hao Fu, Kai Yang, Ji Young Kim, Ren Ren, Joong Kee Lee, Woochul Yang, Guicheng Liu |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
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| Zdroj: |
Carbon Energy, Vol 5, Iss 6, Pp n/a-n/a (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2637-9368 |
| DOI: |
10.1002/cey2.370 |
| Popis: |
Abstract Commercialization of Zn‐metal anodes with low cost and high theoretical capacity is hindered by the poor reversibility caused by dendrites growth, side reactions, and the slow Zn2+‐transport and reaction kinetics. Herein, a reversible heterogeneous electrode of Zn‐nanocrystallites/polyvinyl‐phosphonic acrylamide (Zn/PPAm) with fast electrochemical kinetics is designed for the first time: phosphonic acid groups with strong polarity and chelation effect ensure structural reversibility and stability of the three‐dimensional Zn‐storage‐host PPAm network and the Zn/PPAm hybrid; hydrophobic carbon chains suppress side reactions such as hydrogen evolution and corrosion; weak electron‐donating amide groups constitute Zn2+‐transport channels and promote “desolvation” and “solvation” effects of Zn2+ by dragging the PPAm network on the Zn‐metal surface to compress/stretch during Zn plating/stripping, respectively; and the heterostructure and Zn nanocrystallites suppress dendrite growth and enhance electrochemical reactivity, respectively. Thus, the Zn/PPAm electrode shows cycle reversibility of over 6000 h with a hysteresis voltage as low as 31 mV in symmetrical cells and excellent durability and flexibility in fiber‐shaped batteries. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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