One-Dimensional RuO2/Mn2O3 Hollow Architectures as Efficient Bifunctional Catalysts for Lithium-Oxygen Batteries

Nano Letters
Ki Ro YoonIl-Doo Kim

Abstract

Rational design and massive production of bifunctional catalysts with fast oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) kinetics are critical to the realization of highly efficient lithium-oxygen (Li-O2) batteries. Here, we first exploit two types of double-walled RuO2 and Mn2O3 composite fibers, i.e., (i) phase separated RuO2/Mn2O3 fiber-in-tube (RM-FIT) and (ii) multicomposite RuO2/Mn2O3 tube-in-tube (RM-TIT), by controlling ramping rate during electrospinning process. Both RM-FIT and RM-TIT exhibited excellent bifunctional electrocatalytic activities in alkaline media. The air electrodes using RM-FIT and RM-TIT showed enhanced overpotential characteristics and stable cyclability over 100 cycles in the Li-O2 cells, demonstrating high potential as efficient OER and ORR catalysts.

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Citations

Sep 8, 2018·Nanotechnology·Mohammad Fathi ToviniEda Yılmaz
Nov 16, 2018·Advanced Materials·Keke HuangShouhua Feng
Nov 18, 2018·ChemSusChem·Xiaoxiao ShenYuhui Chen
May 5, 2020·Nanoscale Horizons : the Home for Rapid Reports of Exceptional Significance in Nanoscience and Nanotechnolgy·Ayeong ByeonJin Young Kim
Jun 1, 2018·ACS Applied Materials & Interfaces·Min-Hyeok KimIl-Doo Kim
Aug 23, 2019·ACS Applied Materials & Interfaces·Ji-Soo JangIl Doo Kim
Dec 16, 2017·ACS Applied Materials & Interfaces·Su Hyun KimYun Jung Lee
Dec 5, 2018·ACS Applied Materials & Interfaces·Yuanyuan GuoKhalil Amine
Sep 18, 2018·ACS Applied Materials & Interfaces·Moumita RanaUjjal K Gautam

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