Bifunctional Hybrid Catalysts with Perovskite LaCo0.8Fe0.2O3 Nanowires and Reduced Graphene Oxide Sheets for an Efficient Li–O2 Battery Cathode
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- Title
- Bifunctional Hybrid Catalysts with Perovskite LaCo0.8Fe0.2O3 Nanowires and Reduced Graphene Oxide Sheets for an Efficient Li–O2 Battery Cathode
- Authors
- Kim, Jong Guk; Kim, Youngmin; Noh, Yuseong; Lee, Seonhwa; Kim, Yoongon; Kim, Won Bae
- Date Issued
- 2018-02
- Publisher
- AMER CHEMICAL SOC
- Abstract
- In this paper, bifunctional catalysts consisting of perovskite LaCo0.8Fe0.2O3 nanowires (LCFO NWs) with reduced graphene oxide (rGO) sheets were prepared for use in lithium-oxygen (Li-O2) battery cathodes. The prepared LCFO@rGO composite was explored as a cathode catalyst for Li-O2 batteries, resulting in an outstanding discharge capacity (ca. 7088.2 mAh g-1) at the first cycle. Moreover, a high stability of the O2-cathode with the LCFO@rGO catalyst was achieved over 56 cycles under the capacity limit of 500 mAh g-1 with a rate of 200 mA g-1, as compared to the Ketjenblack carbon and LCFO NWs. The enhanced electrochemical performance suggests that these hybrid composites of perovskite LCFO NWs with rGO nanosheets could be a perspective bifunctional catalyst for the cathode oxygen reduction and oxygen evolution reactions in the development of next-generation Li-O2 battery cathodes. © 2018 American Chemical Society.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/40995
- DOI
- 10.1021/acsami.7b14599
- ISSN
- 1944-8244
- Article Type
- Article
- Citation
- ACS Applied Materials & Interfaces, vol. 10, no. 6, page. 5429 - 5439, 2018-02
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