Efficient Fe<sub>3</sub>C-CF Cathode Catalyst Based on the Formation/Decomposition of Li<sub>2−x</sub>O<sub>2</sub> for Li-O<sub>2</sub> Batteries
Lithium-oxygen batteries have attracted considerable attention in the past several years due to their ultra-high theoretical energy density. However, there are still many serious issues that must be addressed before considering practical applications, including the sluggish oxygen redox kinetics, th...
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| Format: | Article |
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MDPI AG
2023-07-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/28/14/5597 |
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| author | Guanyu Yi Gaoyang Li Shuhuai Jiang Guoliang Zhang Liang Guo Xiuqi Zhang Zhongkui Zhao Zhongping Zou Hailong Ma Xiaojiao Fu Yan Liu Feng Dang |
| author_facet | Guanyu Yi Gaoyang Li Shuhuai Jiang Guoliang Zhang Liang Guo Xiuqi Zhang Zhongkui Zhao Zhongping Zou Hailong Ma Xiaojiao Fu Yan Liu Feng Dang |
| author_sort | Guanyu Yi |
| collection | DOAJ |
| description | Lithium-oxygen batteries have attracted considerable attention in the past several years due to their ultra-high theoretical energy density. However, there are still many serious issues that must be addressed before considering practical applications, including the sluggish oxygen redox kinetics, the limited capacity far from the theoretical value, and the poor cycle stability. This study proposes a surface modification strategy that can enhance the catalytic activity by loading Fe<sub>3</sub>C particles on carbon fibers, and the microstructure of Fe<sub>3</sub>C particle-modified carbon fibers is studied by multiple materials characterization methods. Experiments and density functional theory (DFT) calculations show that the discharge products on the Fe<sub>3</sub>C carbon fiber (Fe<sub>3</sub>C-CF) cathode are mainly Li<sub>2−x</sub>O<sub>2</sub>. Fe<sub>3</sub>C-CF exhibits high catalytic ability based on its promotion of the formation/decomposition processes of Li<sub>2−x</sub>O<sub>2</sub>. Consequently, the well-designed electrode catalyst exhibits a large specific capacity of 17,653.1 mAh g<sup>−1</sup> and an excellent cyclability of 263 cycles at a current of 200 mA g<sup>−1</sup>. |
| first_indexed | 2024-03-11T00:47:21Z |
| format | Article |
| id | doaj.art-e0aacc58b5684c49a15bfdc50b8d8a62 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-11T00:47:21Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-e0aacc58b5684c49a15bfdc50b8d8a622023-11-18T20:44:25ZengMDPI AGMolecules1420-30492023-07-012814559710.3390/molecules28145597Efficient Fe<sub>3</sub>C-CF Cathode Catalyst Based on the Formation/Decomposition of Li<sub>2−x</sub>O<sub>2</sub> for Li-O<sub>2</sub> BatteriesGuanyu Yi0Gaoyang Li1Shuhuai Jiang2Guoliang Zhang3Liang Guo4Xiuqi Zhang5Zhongkui Zhao6Zhongping Zou7Hailong Ma8Xiaojiao Fu9Yan Liu10Feng Dang11School of Materials Science and Engineering, Shandong Jianzhu University, Jinan 250101, ChinaKey Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, Jinan 250061, ChinaSchool of Materials Science and Engineering, Shandong Jianzhu University, Jinan 250101, ChinaKey Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, Jinan 250061, ChinaKey Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, Jinan 250061, ChinaKey Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, Jinan 250061, ChinaSchool of Materials Science and Engineering, Shandong Jianzhu University, Jinan 250101, ChinaSchool of Materials Science and Engineering, Shandong Jianzhu University, Jinan 250101, ChinaSchool of Materials Science and Engineering, Shandong Jianzhu University, Jinan 250101, ChinaSchool of Materials Science and Engineering, Shandong Jianzhu University, Jinan 250101, ChinaSchool of Materials Science and Engineering, Shandong Jianzhu University, Jinan 250101, ChinaKey Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, Jinan 250061, ChinaLithium-oxygen batteries have attracted considerable attention in the past several years due to their ultra-high theoretical energy density. However, there are still many serious issues that must be addressed before considering practical applications, including the sluggish oxygen redox kinetics, the limited capacity far from the theoretical value, and the poor cycle stability. This study proposes a surface modification strategy that can enhance the catalytic activity by loading Fe<sub>3</sub>C particles on carbon fibers, and the microstructure of Fe<sub>3</sub>C particle-modified carbon fibers is studied by multiple materials characterization methods. Experiments and density functional theory (DFT) calculations show that the discharge products on the Fe<sub>3</sub>C carbon fiber (Fe<sub>3</sub>C-CF) cathode are mainly Li<sub>2−x</sub>O<sub>2</sub>. Fe<sub>3</sub>C-CF exhibits high catalytic ability based on its promotion of the formation/decomposition processes of Li<sub>2−x</sub>O<sub>2</sub>. Consequently, the well-designed electrode catalyst exhibits a large specific capacity of 17,653.1 mAh g<sup>−1</sup> and an excellent cyclability of 263 cycles at a current of 200 mA g<sup>−1</sup>.https://www.mdpi.com/1420-3049/28/14/5597Fe<sub>3</sub>C-CFLi-O<sub>2</sub> batteriesLi<sub>2−x</sub>O<sub>2</sub>DFT calculations |
| spellingShingle | Guanyu Yi Gaoyang Li Shuhuai Jiang Guoliang Zhang Liang Guo Xiuqi Zhang Zhongkui Zhao Zhongping Zou Hailong Ma Xiaojiao Fu Yan Liu Feng Dang Efficient Fe<sub>3</sub>C-CF Cathode Catalyst Based on the Formation/Decomposition of Li<sub>2−x</sub>O<sub>2</sub> for Li-O<sub>2</sub> Batteries Molecules Fe<sub>3</sub>C-CF Li-O<sub>2</sub> batteries Li<sub>2−x</sub>O<sub>2</sub> DFT calculations |
| title | Efficient Fe<sub>3</sub>C-CF Cathode Catalyst Based on the Formation/Decomposition of Li<sub>2−x</sub>O<sub>2</sub> for Li-O<sub>2</sub> Batteries |
| title_full | Efficient Fe<sub>3</sub>C-CF Cathode Catalyst Based on the Formation/Decomposition of Li<sub>2−x</sub>O<sub>2</sub> for Li-O<sub>2</sub> Batteries |
| title_fullStr | Efficient Fe<sub>3</sub>C-CF Cathode Catalyst Based on the Formation/Decomposition of Li<sub>2−x</sub>O<sub>2</sub> for Li-O<sub>2</sub> Batteries |
| title_full_unstemmed | Efficient Fe<sub>3</sub>C-CF Cathode Catalyst Based on the Formation/Decomposition of Li<sub>2−x</sub>O<sub>2</sub> for Li-O<sub>2</sub> Batteries |
| title_short | Efficient Fe<sub>3</sub>C-CF Cathode Catalyst Based on the Formation/Decomposition of Li<sub>2−x</sub>O<sub>2</sub> for Li-O<sub>2</sub> Batteries |
| title_sort | efficient fe sub 3 sub c cf cathode catalyst based on the formation decomposition of li sub 2 x sub o sub 2 sub for li o sub 2 sub batteries |
| topic | Fe<sub>3</sub>C-CF Li-O<sub>2</sub> batteries Li<sub>2−x</sub>O<sub>2</sub> DFT calculations |
| url | https://www.mdpi.com/1420-3049/28/14/5597 |
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