离子液体辅助水热合成1T-MoS_(2)及其锌离子储存性能  

Ionic Liquid-assisted Hydrothermal Synthesis of 1T-MoS_(2)and Its Zinc Ion Storage Performance

作　　者：王璐 WANG Lu(School of Municipal and Environmental Engineering,Shenyang Urban Construction University,Shenyang 110167,China)

机构地区：[1]沈阳城市建设学院市政与环境工程学院,沈阳110167

出　　处：《高等学校化学学报》2024年第9期133-139,共7页Chemical Journal of Chinese Universities

基　　金：2022年辽宁省一流本科课程“环境导论”(批准号:辽教办〔2022〕251号);2024年度辽宁省民办教育协会教育科学“十四五”规划项目(批准号:LMX2024224);沈阳城市建设学院科研发展基金(批准号:XKJ-YB-202411)资助.

摘　　要：采用离子液体辅助水热法,在碳布(CC)上合成了具有扩大层间距的1T-MoS_(2)纳米片阵列,对其结构形貌进行了表征,并研究了其锌离子储存性能.研究发现,作为水系锌离子电池正极材料,1T-MoS_(2)/CC在0.1 A/g电流密度下呈现出194.2 mA·h/g的放电比容量,且在1 A/g大电流密度下经750次循环后,仍可保持95.5%的容量保持率.1T-MoS_(2)/CC具有优异的锌离子储存性能可归因于:离子液体促进了1T相的形成,纳米阵列中的1T-MoS_(2)相含量约为78%,而高浓度1T相使其具有良好的电荷转移速率;离子液体插入1T-MoS_(2)层间使其层间距增至1.06 nm,可降低水合锌离子嵌入过程的能垒;碳布的三维结构可抑制MoS_(2)纳米片的聚集,从而促进了1T-MoS_(2)/CC与电解液间的充分接触.A 1T-MoS_(2)nanosheets array with expanded interlayer spacing was synthesized on carbon cloth(CC)using an ionic liquid-assisted hydrothermal method.As a positive electrode material for zinc ion batteries,1T-MoS_(2)/CC exhibits a discharge specific capacity of 194.2 mA·h/g at 0.1 A/g current density,and can still maintain a capacity retention rate of 95.5%after 750 cycles at a high current density of 1 A/g.The excellent zinc ion storage capacity of 1T-MoS_(2)/CC can be attributed to:(1)ionic liquids promote the formation of 1T phase,with a 1T-MoS_(2)phase content of about 78%in the nanoarray,and a high concentration of 1T phase content gives it a good charge transfer rate;(2)the insertion of ionic liquids between 1T-MoS_(2)layers increases the interlayer spacing to 1.06 nm,which can reduce the energy barrier during the insertion process of hydrated zinc ions;(3)the three-dimensional structure of carbon cloth can inhibit the aggregation of MoS_(2)nanopages and promote sufficient contact between 1T-MoS_(2)/CC and electrolyte.

关 键 词：二硫化钼 1T相 离子液体 锌离子电池 水热合成 

分 类 号：O646[理学—物理化学] O611.4[理学—化学]