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High-voltage asymmetric metal–air batteries based on polymeric single-Zn2+-ion conductor

Title
High-voltage asymmetric metal–air batteries based on polymeric single-Zn2+-ion conductor
Author
삼바지 시바지 신데
Keywords
single-ion conducting membrane; asymmetric metal–air batteries; Co single atoms; oxygen reduction and evolution reactions
Issue Date
2021-04
Publisher
Cell Press
Citation
Matter, v. 4, NO 4, Page. 1287-1304
Abstract
Asymmetric-electrolyte metal–air batteries (AMABs) deliver high operating voltage and energy density. However, the demand for ion-selective transport separator and precious metal electrocata- lysts hampers their applications. To address this issue, we develop a polyacrylonitrile (PAN) separator that can selectively transport Zn2+ ions and an atomically dispersed Co electrocatalyst that can catalyze oxygen evolution reactions (OERs) and oxygen reduction reactions (ORRs) in the challenging acidic medium. The selective ion transport behavior was associated with the Zn2+ ions’ bonded ladder structure of PAN, which raises the ion migration energy bar- rier for the crossover of H+ and OH . In terms of electrocatalysts, extensive ex situ and in situ characterizations suggest that Co sin- gle-atom sites stably catalyze the OER and ORR. Several types of AMABs (metals Zn, Si, Sn) were tested. The assembled asymmetric metal–air Zn-, Si-, and Sn-air batteries delivered enhanced battery performance that surpassed those of recently reported Zn-, Si-, and Sn-air batteries, respectively.
URI
https://www.sciencedirect.com/science/article/pii/S2590238521000047https://repository.hanyang.ac.kr/handle/20.500.11754/171752
ISSN
2590-2385
DOI
10.1016/j.matt.2021.01.004
Appears in Collections:
RESEARCH INSTITUTE[E](부설연구소) > RESEARCH INSTITUTE OF ENGINEERING & TECHNOLOGY(공학기술연구소) > Articles
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