| Autor: |
Hengxue Zhou, Jialiang Wang, Yeba Yan, Yue Fang, Yi Long, Bo Liang, Yingbang Yao, Shengguo Lu, Tao Tao |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
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| Zdroj: |
ChemPhysMater, Vol 3, Iss 4, Pp 481-489 (2024) |
| Druh dokumentu: |
article |
| ISSN: |
2772-5715 |
| DOI: |
10.1016/j.chphma.2024.07.005 |
| Popis: |
Although Li–S batteries have a high theoretical capacity, their application are significantly hindered by the complex shuttle effect of polysulfides. To address the issues, in this paper, Ni2V2O7 prepared by a simple method is proposed as an efficient catalyst for S cathodes. Ni2V2O7 composed of Ni–O octahedra and V–O tetrahedra has a specific electronic structure. The Ni and V atoms interacted, enabling a fast kinetics of polysulfide redox. Moreover, Ni2V2O7 contains metal sites (Ni and V) and oxygen vacancies, providing a high adsorption capacity and abundant active sites for polysulfide redox. Therefore, Li–S batteries consisting of Ni2V2O7-based cathodes exhibit an excellent cycling stability with a capacity of 1061 mAh g−1 and capacity retention of 87.6% after 150 cycles at 0.2 C. Moreover, at 1 C rate, the batteries exhibit a capacity of 706 mAh g−1 after 300 cycles with a minimal capacity decay of only 0.08% per cycle. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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