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Title: Synergistic catalytic properties of bifunctional nanoalloy catalysts in rechargeable lithium-oxygen battery

Authors:
ORCiD logo; ; ; ; ; ; ; ; ;
Publication Date:
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1359475
Grant/Contract Number:
SC0006877
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Journal of Power Sources
Additional Journal Information:
Journal Volume: 326; Journal Issue: C; Related Information: CHORUS Timestamp: 2017-10-06 09:42:30; Journal ID: ISSN 0378-7753
Publisher:
Elsevier
Country of Publication:
Netherlands
Language:
English

Citation Formats

Kang, Ning, Ng, Mei Shan, Shan, Shiyao, Wu, Jinfang, Zhao, Wei, Yin, Jun, Fang, Weiqing, Luo, Jin, Petkov, Valeri, and Zhong, Chuan-Jian. Synergistic catalytic properties of bifunctional nanoalloy catalysts in rechargeable lithium-oxygen battery. Netherlands: N. p., 2016. Web. doi:10.1016/j.jpowsour.2016.06.106.
Kang, Ning, Ng, Mei Shan, Shan, Shiyao, Wu, Jinfang, Zhao, Wei, Yin, Jun, Fang, Weiqing, Luo, Jin, Petkov, Valeri, & Zhong, Chuan-Jian. Synergistic catalytic properties of bifunctional nanoalloy catalysts in rechargeable lithium-oxygen battery. Netherlands. doi:10.1016/j.jpowsour.2016.06.106.
Kang, Ning, Ng, Mei Shan, Shan, Shiyao, Wu, Jinfang, Zhao, Wei, Yin, Jun, Fang, Weiqing, Luo, Jin, Petkov, Valeri, and Zhong, Chuan-Jian. 2016. "Synergistic catalytic properties of bifunctional nanoalloy catalysts in rechargeable lithium-oxygen battery". Netherlands. doi:10.1016/j.jpowsour.2016.06.106.
@article{osti_1359475,
title = {Synergistic catalytic properties of bifunctional nanoalloy catalysts in rechargeable lithium-oxygen battery},
author = {Kang, Ning and Ng, Mei Shan and Shan, Shiyao and Wu, Jinfang and Zhao, Wei and Yin, Jun and Fang, Weiqing and Luo, Jin and Petkov, Valeri and Zhong, Chuan-Jian},
abstractNote = {},
doi = {10.1016/j.jpowsour.2016.06.106},
journal = {Journal of Power Sources},
number = C,
volume = 326,
place = {Netherlands},
year = 2016,
month = 9
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1016/j.jpowsour.2016.06.106

Citation Metrics:
Cited by: 2works
Citation information provided by
Web of Science

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  • RuO2 nanoparticles supported on MnO2 nanorods (denoted as np-RuO2/nr-MnO2) were synthesized via a two-step hydrothermal reaction. SEM and TEM images both illustrated that RuO2 nanoparticles are well dispersed on the surface of MnO2 nanorods in the as-prepared np-RuO2/nr-MnO2 material. Electrochemical results demonstrated that the np-RuO2/nr-MnO2 as oxygen cathode of Li-O-2 batteries could maintain a reversible capacity of 500 mA h g(-1) within 75 cycles at a rate of 50 mA g(-1), and a higher capacity of 4000 mA h g(-1) within 20 cycles at a rate as high as 200 mA g(-1). Moreover, the cell with the np-RuO2/nr-MnO2 catalyst presentedmore » much lower voltage polarization (about 0.58 V at a rate of 50 mA g(-1)) than that measured with only MnO2 nanorods during charge/discharge processes. The catalytic property of the np-RuO2/nr-MnO2 and MnO2 nanorods were further compared by conducting studies of using rotating disk electrode (RDE), chronoamperommetry and linear sweep voltammetry. The results illustrated that the np-RuO2/nr-MnO2 exhibited excellent bifunctional electrocatalytic activities towards both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). Furthermore, in-situ high-energy X-ray diffraction was employed to trace evolution of species on the np-RuO2/nr-MnO2 cathode during the discharge processes. In-situ XRD patterns demonstrated the formation process of the discharge products that consisted of mainly Li2O2. Ex-situ SEM images were recorded to investigate the morphology and decomposition of the sphere-like Li2O2, which could be observed clearly after discharge process, while are decomposed almost after charge process. The excellent electrochemical performances of the np-RuO2/nr-MnO2 as cathode of Li-O-2 battery could be contributed to the excellent bifunctional electrocatalytic activities for both the ORR and OER, and to the one-dimensional structure which would benefit the diffusion of oxygen and the storage of Li2O2 in the discharge process of Li-O-2 battery.« less
  • The catalytic activity of YFeO{sub 3}-based catalysts in the lean-NO{sub x} process was studied for the sulfated perovskite YFeO{sub 3}, composites between YFeO{sub 3} and the solid acid ZrO{sub 2}, as well as sulfated composites YFeO{sub 3}/ZrO{sub 2}. Moreover, a mechanical mixture between YFeO{sub 3} and sulfated tetragonal zirconia (t-ZrO{sub 2}/SO{sub 4}) was studied. It is shown that the lean-NO{sub x} activity of YFeO{sub 3} is improved by forming the composites YFeO{sub 3}/ZrO{sub 2} as well as by sulfating samples, with the highest conversion rates of NO{sub x} into N{sub 2} being about 30% at about 400 C. The disadvantagemore » of these materials is that the activity decreases with increasing the oxygen content of the feed gas. However, the mechanical mixture between YFeO{sub 3} and t-ZrO{sub 2}/SO{sub 4} shows not only an improved high-temperature activity at about 400 C but also a pronounced low temperature (< 300--350 C) activity. The latter clearly increases with increasing oxygen content, whereas the former decreases. The opposing effect of oxygen is explained by different reaction mechanisms.« less