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Liu et al. Energy Mater 2023;3:300011 Energy Materials
DOI: 10.20517/energymater.2022.68

Article Open Access

Rational design of Ru/TiO /CNTs as cathode:
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promotion of cycling performance for aprotic
lithium-oxygen battery

1,*
2,*
1
3
Lili Liu , Congcong Zhou , Weiwei Fang , Yuyang Hou , Yuping Wu 1
1
School of Energy Science and Engineering, Nanjing Tech University, Nanjing 211816, Jiangsu, China.
2
International Innovation Center for Forest Chemicals and Materials, College of Chemical Engineering, Nanjing Forestry
University, Nanjing 210037, Jiangsu, China.
3
CSIRO Mineral Resources, Clayton, VIC 3168, Australia.
*Correspondence to: Prof. Lili Liu, School of Energy Science and Engineering, Nanjing Tech University, Nanjing 211816, Jiangsu,
China. E-mail: liulili@njtech.edu.cn; Prof. Weiwei Fang, International Innovation Center for Forest Chemicals and Materials,
College of Chemical Engineering, Nanjing Forestry University, 159 Longpan Road, Nanjing 210037, Jiangsu, China. E-mail:
wwfang2020@njfu.edu.cn
How to cite this article: Liu L, Zhou C, Fang W, Hou Y, Wu Y. Rational design of Ru/TiO /CNTs as cathode: promotion of cycling
2
performance for aprotic lithium-oxygen battery. Energy Mater 2023;3:300011.
https://dx.doi.org/10.20517/energymater.2022.68
Received: 24 Oct 2022 First Decision: 28 Nov 2022 Revised: 19 Jan 2023 Accepted: 13 Feb 2023 Published: 23 Mar 2023

Academic Editors: Md Mokhlesur Rahman, Jia-Qi Huang Copy Editor: Fangling Lan Production Editor: Fangling Lan

Abstract
Realizing long-life cycling is the biggest challenge in the research field of Li-O batteries in the current stage. The
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main reasons for poor cycling performance are the sluggish Li O formation and decomposition process, as well as
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the side reaction of carbon cathode. In order to accurately address the problems above, a TiO /CNTs cathode was
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rationally designed for long-life Li-O batteries. The CNTs skeleton offers multiple three-dimensional channels for
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+
the rapid transportation of oxygen, Li and electrons. A thin-film and discontinuous layer of TiO is coated on the
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CNTs surface to effectively inhibit the carbon corrosion but still could let mass transfer smoothly. Ultrafine Ru
nanoparticles decorating the TiO /CNTs serve as efficient catalytic active sites. Benefiting from the unique
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structure design, Li-O batteries with the cathode of TiO /CNTs achieve a cycling life of 110 with a fixed capacity of
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2
-1
-1
500 mAh g at a current density of 100 mA g . Our research generates new ideas for designing long-cycling Li-O 2
battery cathodes.
Keywords: Lithium-oxygen battery, rational design cathode, side reaction, Li O , cycling performance
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