Electrochemically exfoliated WS_(2)in molten salt for sodium-ion battery anode  

作　　者：Bei-Lei Zhang Xiang Chen Hai-Jia Zhao Hong-Wei Xie Hua-Yi Yin 

机构地区：[1]Key Laboratory for Ecological Metallurgy of Multimetallic Mineral of Ministry of Education,School of Metallurgy,Northeastern University,Shenyang,110819,China [2]School of Resource and Environmental Science,Wuhan University,Wuhan,430072,China

出　　处：《Rare Metals》2023年第4期1227-1237,共11页稀有金属（英文版）

基　　金：financially supported by the Fundamental Research Funds for the Central Universities(Nos.N2025034 and N2025035);Xingliao Project(No.XLYC1807042);the Program of the Ministry of Education of China for Introducing Talents of Discipline to Universities(No.B16009)。

摘　　要：The poor crystallinity and unstable crystal structure of tungsten disulfide(WS2)limit its application in practice.In this paper,a molten salt electrolysis method is proposed to intercalate metal ions into the interlayers of layered WS2 to obtain few-layer sheetlike structures.The effect of the molten salt system,applied constant current and electrolysis duration on the exfoliation degree of WS2 bulk has been investigated.The results show that the products electrolyzed in molten LiCl-NaCl-KCl and NaClKCl salts under 25 mA were more transparent and thinner flakes sheets due to the uniform intercalation of Li^+and Na^+with smaller size.The exfoliated WS_(2)was used as an anode material for sodium-ion batteries with a potential of 0.01-2.50 V.In comparison,the WS_(2)-NaCl-25 mA electrode displays a high reversible capacity of 373 mAh·g^(-1)at0.1 A·g^(-1)after cycling for 100 cycles at the same time showing great rate and cycle performance.It also presents a high capacitive ratio of 90.65%at 1.0 mV·s^(-1).The molten salt electrolysis provides a new perspective on the exfoliation of layered material,while demonstrating the great potential of WS2 as an anode material for sodium-ion battery.

关 键 词：Tungsten disulfide Molten salt electrolysis EXFOLIATION Sodium-ion battery(SIB)anode 

分 类 号：TM912[电气工程—电力电子与电力传动] TQ136.13[化学工程—无机化工]