Modulating single-atom sulfur-vacancy defect in MoS 2-x catalysts to boost cathode redox kinetics for vanadium flow batteries

doi:10.1016/j.ensm.2024.103442

IMR OpenIR

	Modulating single-atom sulfur-vacancy defect in MoS 2-x catalysts to boost cathode redox kinetics for vanadium flow batteries
	Zhang, Xihao 1,2; Liu, Lansong 1,2; Zhang, Kaiyue 3; Zhang, Denghua 4; Hou, Shaoyu 1; Zhao, Jinling 1; He, Hongxiang 1; Wu, Xiaoliang 1; Liu, Jianguo 1; Yan, Chuanwei 1
通讯作者	Liu, Jianguo(jgliu@imr.ac.cn)
	2024-05-01
发表期刊	ENERGY STORAGE MATERIALS
ISSN	2405-8297
卷号	69 页码:10
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.
关键词	S-vacancy D-band center Vacancy state Vanadium flow battery Electrode
资助者	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
DOI	10.1016/j.ensm.2024.103442
收录类别	SCI
语种	英语
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
WOS类目	Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS记录号	WOS:001238638500001
出版者	ELSEVIER
引用统计	被引频次：9[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/186688
专题	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.