Modulating single-atom sulfur-vacancy defect in MoS 2-x catalysts to boost cathode redox kinetics for vanadium flow batteries
文献类型：期刊论文
| 作者 | Zhang, Xihao1,2; Liu, Lansong1,2; Zhang, Kaiyue3; Zhang, Denghua4; Hou, Shaoyu1; Zhao, Jinling1; He, Hongxiang1; Wu, Xiaoliang1; Liu, Jianguo1; Yan, Chuanwei1 |
| 刊名 | ENERGY STORAGE MATERIALS
 |
| 出版日期 | 2024-05-01 |
| 卷号 | 69页码:10 |
| 关键词 | S-vacancy D-band center Vacancy state Vanadium flow battery Electrode |
| ISSN号 | 2405-8297 |
| DOI | 10.1016/j.ensm.2024.103442 |
| 通讯作者 | Liu, Jianguo(jgliu@imr.ac.cn) |
| 英文摘要 | Vanadium flow batteries (VFBs) have great potential for application in energy storage systems. However, the sluggish cathode redox kinetics still greatly restricts their operation at high current densities. Herein, we boost cathode redox chemistry by modulating single -atom sulfur -vacancy (S -vacancy) defect of MoS 2-x in -situ grown on carbon felts via a facile chemical etching method. Firstly, the optimized S -vacancy concentration is figured out via high throughput calculations based on D -band center theory. By precisely controlling etching duration, we achieve a tailored S -vacancy concentration, leading to highly dispersed S -vacancies, increased specific surface area, and improved hydrophilicity. Electrochemical characterizations demonstrate that optimized S -vacancy state can significantly facilitate the VO 2+ /VO 2 + kinetics. Moreover, analysis of electron density difference and integrated crystal orbital Hamiltonian group further reveals that dispersed S -vacancy distribution also contribute to efficient surface electronic structure and enhanced adsorption process. Benefiting from enhanced VO 2+ /VO 2 + kinetics, VFB single cell achieves a superior EE of 78.73 % at 300 mA cm -2 and is able to last for 500 cycles without decay. This work demonstrates the promising potential of single -atom S -vacancies catalysts in the fabrication of flow battery electrodes and more importantly sheds light on the fundamental modulation essence of D -band center in MoS 2-x towards enhanced cathode redox kinetics. |
| 资助项目 | National Key R & D Program of China[2022YFB2404901] ; National Natural Science Foundation of China[21975267] ; National Natural Science Foundation of China[22309121] ; Central Guidance on Local Science and Technology Development Fund of Liaoning Province[2022JH6/100100001] |
| WOS研究方向 | Chemistry ; Science & Technology - Other Topics ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:001238638500001 |
| 出版者 | ELSEVIER |
| 资助机构 | National Key R & D Program of China ; National Natural Science Foundation of China ; Central Guidance on Local Science and Technology Development Fund of Liaoning Province |
| 源URL |  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Liu, Jianguo |
| 作者单位 | 1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Liaoning, Peoples R China 3.Shenyang Ligong Univ, Sch Mat Sci & Engn, Shenyang 110159, Liaoning, Peoples R China 4.Liaoning Petrochem Univ, Sch Petrochem Engn, Fushun 113001, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Xihao,Liu, Lansong,Zhang, Kaiyue,et al. Modulating single-atom sulfur-vacancy defect in MoS 2-x catalysts to boost cathode redox kinetics for vanadium flow batteries[J]. ENERGY STORAGE MATERIALS,2024,69:10. |
| APA | Zhang, Xihao.,Liu, Lansong.,Zhang, Kaiyue.,Zhang, Denghua.,Hou, Shaoyu.,...&Yan, Chuanwei.(2024).Modulating single-atom sulfur-vacancy defect in MoS 2-x catalysts to boost cathode redox kinetics for vanadium flow batteries.ENERGY STORAGE MATERIALS,69,10. |
| MLA | Zhang, Xihao,et al."Modulating single-atom sulfur-vacancy defect in MoS 2-x catalysts to boost cathode redox kinetics for vanadium flow batteries".ENERGY STORAGE MATERIALS 69(2024):10. |
入库方式： OAI收割
来源：金属研究所
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