Detailed Information

Cited 0 time in webofscience Cited 15 time in scopus
Metadata Downloads

Polyoxometalate as a Nature-Inspired Bifunctional Catalyst for Lithium-Oxygen Batteries

Authors
Lee, Jun-SeoLee, CheolminLee, Jae-YunRyu, JungkiRyu, Won-Hee
Issue Date
Aug-2018
Publisher
AMER CHEMICAL SOC
Keywords
lithium-oxygen batteries; polyoxometalate; nature-inspired molecule; dispersion catalyst; water oxidation catalyst
Citation
ACS CATALYSIS, v.8, no.8, pp 7213 - 7221
Pages
9
Journal Title
ACS CATALYSIS
Volume
8
Number
8
Start Page
7213
End Page
7221
URI
https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/4404
DOI
10.1021/acscatal.8b01103
ISSN
2155-5435
Abstract
Nature-inspired molecules present a family of affordable, environmentally friendly catalysts to enable and enhance next-generation energy storage systems. In this study, we report the use of cobalt-based polyoxometalates (Co-POMs) with an oxo-bridged tetracobalt active site, which is reminiscent of the natural oxygen-evolving complex, as an efficient and stable redox catalyst for Li-O-2 batteries. Interestingly, Co-POMs exhibit catalytic activity for both oxygen evolution and reduction reactions (OER and ORR, respectively) under a certain condition when it forms a stable dispersion of molecular aggregates, which can be controlled by the types of electrolyte solvents and exposure to light. As a result of the optimized OER/ORR bifunctional activity, Li-O-2 cells facilitated by Co-POM redox reactions successfully achieve improved efficiency and a longer cycle life in comparison to reference cells. The reversibility of the Li-O-2 reactions in the presence of the bifunctional Co-POM catalysts is confirmed by ex situ characterizations.
Files in This Item
Go to Link
Appears in
Collections
공과대학 > 화공생명공학부 > 1. Journal Articles

qrcode

Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.

Related Researcher

Researcher Ryu, Won Hee photo

Ryu, Won Hee
공과대학 (화공생명공학부)
Read more

Altmetrics

Total Views & Downloads

BROWSE