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Highly dispersed La−O/N−C sites anchored in hierarchically porous nitrogen-doped carbon as bifunctional catalysts for high-performance rechargeable Zn−air batteries

Bi, Zenghui (author)
School of Materials and Energy, Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Science, Yunnan University, Kunming, China
Zhang, Hua (author)
School of Materials and Energy, Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Science, Yunnan University, Kunming, China
Zhao, Xue (author)
School of Materials and Energy, Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Science, Yunnan University, Kunming, China
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Wang, Yuwen (author)
School of Materials and Energy, Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Science, Yunnan University, Kunming, China
Tan, Fang (author)
School of Materials and Energy, Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Science, Yunnan University, Kunming, China
Chen, Songqing (author)
School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, China
Feng, Ligang (author)
School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, China
Zhou, Yingtang (author)
National Engineering Research Center for Marine Aquaculture, Marine Science and Technology College, Zhejiang Ocean University, Zhoushan, China
Ma, Xin (author)
School of Energy and Chemical Engineering, Xinjiang Institute of Technology, Akesu, China
Su, Zhi (author)
School of Energy and Chemical Engineering, Xinjiang Institute of Technology, Akesu, China
Wang, Xinzhong (author)
School of Electronic Communication Technology, Shenzhen Institute of Information Technology, Shenzhen, China
Wågberg, Thomas, 1971- (author)
Umeå universitet,Institutionen för fysik
Hu, Guangzhi (author)
Umeå universitet,Institutionen för fysik,School of Materials and Energy, Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Science, Yunnan University, Kunming, China
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 (creator_code:org_t)
Elsevier, 2023
2023
English.
In: Energy Storage Materials. - : Elsevier. - 2405-8289 .- 2405-8297. ; 54, s. 313-322
Related links:
https://doi.org/10.1...
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https://umu.diva-por... (primary) (Raw object)
https://urn.kb.se/re...
https://doi.org/10.1...
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  • Journal article (peer-reviewed)
Abstract Subject headings
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  • Inexpensive, high-activity bifunctional catalysts for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are imperative for the development of energy storage and conversion systems. A nitrogen-doped carbon material with a micro−meso−macroporous structure doped with La (LaPNC) containing La−O/N−C active sites is prepared using SiO2 particle templating of carbon and a metal node exchange strategy. The coordination environment of La sites stabilized by two oxygen and four nitrogen atoms (LaO2N4), is further verified by X-ray absorption spectroscopy. The ORR half-wave potential reaches 0.852 V, and the OER overpotential reaches 263 mV at 10 mA cm−2. The Zn−air battery, with LaPNC as the air cathode, has a maximum power density of 202 mW cm−2 and achieves stable charge−discharge for at least 100 h without a significant increase or decrease in the charge or discharge voltages, respectively. Density functional theory calculations suggest that LaO2N4 sites exhibit the lowest activation free energy and the most easily desorbed oxygen capacity. This study provides new insights into the design of efficient, durable bifunctional catalysts as alternatives to precious-metal-based catalysts.

Subject headings

TEKNIK OCH TEKNOLOGIER  -- Kemiteknik -- Annan kemiteknik (hsv//swe)
ENGINEERING AND TECHNOLOGY  -- Chemical Engineering -- Other Chemical Engineering (hsv//eng)

Keyword

Micro−meso−macroporous structure
Oxygen evolution reaction
Oxygen reduction reaction
Single-atom catalyst
Zn−air battery

Publication and Content Type

ref (subject category)
art (subject category)

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