High performance potassium/sodium-ion storage enabled by anchoring cobalt atoms on sulfur vacancies in WS₂ nanosheets

Zhu, Qing1; Li, Wenhao1; Hu, Xiuli1; Lu, Zhouguang2; He, Liqing3; Tian, Ningchen4; Huang, Bin1; Li, Yanwei1

2024-11-20

10.1016/j.colsurfa.2024.135404

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS   影响因子和分区

0927-7757

1873-4359

Transition metal dichalcogenides (TMDs) as anodes have presented significant potential in alkali-ion batteries. Nevertheless, they are generally vulnerable to low conductivity and sluggish ion diffusion as well as severe volume variation. Here, a strategy of filling metal atoms into anion vacancies is proposed and applied to the example of WS2. More specifically, sulfur vacancies are produced and partially filled by Co atoms simultaneously in WS2 (denoted as Co@WS2-S-V), creating a highly reactive micro-structure composed of Co-W-S, which can not only effectively provide more active sites, but also boost the charge transfer and reaction kinetics. Consequently, the as-prepared Co@WS2-S-V exhibits superior K+ storage performance, which includes an ultrahigh reversible capacity of 382.9 mAh g(-1) at 0.05 A g(-1). Besides, Co@WS2-S-V still maintain a capacity of 112.6 mAh g(-1) after 1100 cycles at 2 A g(-1) while the capacity fades to similar to 0 mAh g(-1) after only 800 cycles for WS2. Simultaneously, Co@WS2-S-V also displays outstanding rate capability (338.7 mA h g(-1) at 2 A g(-1)) and acceptable cycling performance (264.2 mA h g(-1) at 1 A g(-1) after 100 cycles) for sodium storage. The strategy in our study provides new way of precisely designing the other TMDs anodes for metal-ion batteries.

Cobalt atoms filling Sulfur vacancies Co-W-S type structure Potassium/sodium ion batteries WS2 Sulfur vacancies Co-W-S type structure Potassium/sodium ion batteries

SCI

英语

其他

Natural Science Foundation of Guangxi Province[2021GXNSFBA075035] ; Technology Base and Special Talents Development Foundation of Guangxi Province[GUIKE-AD21220108] ; Scientific Research Foundation of Guilin University of Technology[GUTQDJJ2020140]

Chemistry

Chemistry, Physical

WOS:001321953600001

ELSEVIER

Web of Science

1.Guilin Univ Technol, Coll Chem & Bioengn, Guangxi Key Lab Electrochem & Magnetochem Funct Ma, Guilin 541004, Peoples R China
2.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen Key Lab Interfacial Sci & Engn Mat, Shenzhen 518055, Peoples R China
3.Hefei Gen Machinery Res Inst Co Ltd, Hefei 230031, Peoples R China
4.Nation Qual Supervis & Inspect Ctr Graphite Prod, Chenzhou 423000, Peoples R China

Zhu, Qing,Li, Wenhao,Hu, Xiuli,et al. High performance potassium/sodium-ion storage enabled by anchoring cobalt atoms on sulfur vacancies in WS₂ nanosheets[J]. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,2024,703.

Zhu, Qing.,Li, Wenhao.,Hu, Xiuli.,Lu, Zhouguang.,He, Liqing.,...&Li, Yanwei.(2024).High performance potassium/sodium-ion storage enabled by anchoring cobalt atoms on sulfur vacancies in WS₂ nanosheets.COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,703.

Zhu, Qing,et al."High performance potassium/sodium-ion storage enabled by anchoring cobalt atoms on sulfur vacancies in WS₂ nanosheets".COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 703(2024).