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Rational design of redox mediators for advanced Li–O2 batteries Highly Cited Paper

Cited 120 time in webofscience Cited 118 time in scopus
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Title
Rational design of redox mediators for advanced Li–O2 batteries
Author(s)
Hee-Dae Lim; Byungju Lee; Yongping Zheng; Jihyun Hong; Jinsoo Kim; Hyeokjo Gwon; Youngmin Ko; Minah Lee; Kyeongjae Cho; Kisuk Kang
Publication Date
2016-05
Journal
NATURE ENERGY, v.1, no., pp.16066 -
Publisher
NATURE PUBLISHING GROUP
Abstract
The discovery of eective catalysts is an important step towards achieving Li–O2 batteries with long cycle life and high round-trip eciency. Soluble-type catalysts or redox mediators (RMs) possess great advantages over conventional solid catalysts, generally exhibiting much higher eciency. Here, we select a series of organic RM candidates as a model system to identify the key descriptor in determining the catalytic activities and stabilities in Li–O2 cells. It i revealed that the level of ionization energies, readily available parameters from a database of the molecules, can serve such a role when comparing with the formation energy of Li2O2 and the highest occupied molecular orbital energy of the electrolyte. It is demonstrated that they are critical in reducing the overpotential and improving the stability of Li–O2 cells, respectively. Accordingly, we propose a general principle for designing feasible catalysts and report a RM, dimethylphenazine, with a remarkably low overpotential and high stability. © 2016 Macmillan Publishers Limited.
URI
https://pr.ibs.re.kr/handle/8788114/3301
ISSN
2058-7546
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > Journal Papers (저널논문)
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