中国物理B ›› 2023, Vol. 32 ›› Issue (3): 36803-036803.doi: 10.1088/1674-1056/aca6da

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Rational design of Fe/Co-based diatomic catalysts for Li-S batteries by first-principles calculations

Xiaoya Zhang(张晓雅)1, Yingjie Cheng(程莹洁)1, Chunyu Zhao(赵春宇)1, Jingwan Gao(高敬莞)1, Dongxiao Kan(阚东晓)2,†, Yizhan Wang(王义展)1, Duo Qi(齐舵)3, and Yingjin Wei(魏英进)1,‡   

  1. 1 Key Laboratory of Physics and Technology for Advanced Batteries(Ministry of Education), College of Physics, Jilin University, Changchun 130012, China;
    2 Advanced Materials Research Central, Northwest Institute for Non-Ferrous Metal Research, Xi'an 710016, China;
    3 College of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
  • 收稿日期:2022-11-01 修回日期:2022-11-22 接受日期:2022-11-29 出版日期:2023-02-14 发布日期:2023-02-21
  • 通讯作者: Dongxiao Kan, Yingjin Wei E-mail:dxkan1202@126.com;yjwei@jlu.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 51972140 and 51903164) and the Fund from Science and Technology Department of Jilin Province, China (Grant No. 20200201069JC).

Rational design of Fe/Co-based diatomic catalysts for Li-S batteries by first-principles calculations

Xiaoya Zhang(张晓雅)1, Yingjie Cheng(程莹洁)1, Chunyu Zhao(赵春宇)1, Jingwan Gao(高敬莞)1, Dongxiao Kan(阚东晓)2,†, Yizhan Wang(王义展)1, Duo Qi(齐舵)3, and Yingjin Wei(魏英进)1,‡   

  1. 1 Key Laboratory of Physics and Technology for Advanced Batteries(Ministry of Education), College of Physics, Jilin University, Changchun 130012, China;
    2 Advanced Materials Research Central, Northwest Institute for Non-Ferrous Metal Research, Xi'an 710016, China;
    3 College of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
  • Received:2022-11-01 Revised:2022-11-22 Accepted:2022-11-29 Online:2023-02-14 Published:2023-02-21
  • Contact: Dongxiao Kan, Yingjin Wei E-mail:dxkan1202@126.com;yjwei@jlu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 51972140 and 51903164) and the Fund from Science and Technology Department of Jilin Province, China (Grant No. 20200201069JC).

摘要: Fe/Co-based diatomic catalysts decorated on an N-doped graphene substrate are investigated by first-principles calculations to improve the electrochemical properties of Li-S batteries. Our results demonstrate that FeCoN8@Gra not only possesses moderate adsorption energies towards Li2Sn species, but also exhibits superior catalytic activity for both reduction and oxidation reactions of the sulfur cathode. Moreover, the metallic property of the diatomic catalysts can be well maintained after Li2Sn adsorption, which could help the sulfur cathode to maintain high conductivity during the whole charge-discharge process. Given these exceptional properties, it is expected that FeCoN8@Gra could be a promising diatomic catalyst for Li-S batteries and afford insights for further development of advanced Li-S batteries.

关键词: Li-S battery, diatomic catalyst, polysulfides, first-principles calculations

Abstract: Fe/Co-based diatomic catalysts decorated on an N-doped graphene substrate are investigated by first-principles calculations to improve the electrochemical properties of Li-S batteries. Our results demonstrate that FeCoN8@Gra not only possesses moderate adsorption energies towards Li2Sn species, but also exhibits superior catalytic activity for both reduction and oxidation reactions of the sulfur cathode. Moreover, the metallic property of the diatomic catalysts can be well maintained after Li2Sn adsorption, which could help the sulfur cathode to maintain high conductivity during the whole charge-discharge process. Given these exceptional properties, it is expected that FeCoN8@Gra could be a promising diatomic catalyst for Li-S batteries and afford insights for further development of advanced Li-S batteries.

Key words: Li-S battery, diatomic catalyst, polysulfides, first-principles calculations

中图分类号:  (Ab initio calculations of adsorbate structure and reactions)

  • 68.43.Bc
82.45.Jn (Surface structure, reactivity and catalysis) 88.80.ff (Batteries)