高等学校化学学报 ›› 2024, Vol. 45 ›› Issue (9): 20240145.doi: 10.7503/cjcu20240145

• 物理化学 • 上一篇    下一篇

离子液体辅助水热合成1T-MoS2及其锌离子储存性能

王璐()   

  1. 沈阳城市建设学院市政与环境工程学院, 沈阳 110167
  • 收稿日期:2024-03-26 出版日期:2024-09-10 发布日期:2024-08-13
  • 通讯作者: 王璐 E-mail:luluwang328@163.com
  • 基金资助:
    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(LMX2024224);沈阳城市建设学院科研发展基金(XKJ-YB-202411)

Ionic Liquid-assisted Hydrothermal Synthesis of 1T-MoS2 and Its Zinc Ion Storage Performance

WANG Lu()   

  1. School of Municipal and Environmental Engineering,Shenyang Urban Construction University,Shenyang 110167,China
  • Received:2024-03-26 Online:2024-09-10 Published:2024-08-13
  • Contact: WANG Lu E-mail:luluwang328@163.com
  • Supported by:
    the Top Undergraduate Courses of Liaoning Province “Introduction to Enviroment” in 2022, China(No.Liaoning Education Office〔2022〕251), the 14th Five-Year Plan Project of Education Science of Liaoning Provincial Private Education Association in 2024, China(LMX2024224);the Research Development Foundation of Shenyang Urban Construction University, China(XKJ-YB-202411)

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-MoS2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-MoS2/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-MoS2/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-MoS2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-MoS2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MoS2纳米片的聚集, 从而促进了1T-MoS2/CC与电解液间的充分接触.

关键词: 二硫化钼, 1T相, 离子液体, 锌离子电池, 水热合成

Abstract:

A 1T-MoS2 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-MoS2/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-MoS2/CC can be attributed to:(1) ionic liquids promote the formation of 1T phase, with a 1T-MoS2 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-MoS2 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 MoS2 nanopages and promote sufficient contact between 1T-MoS2/CC and electrolyte.

Key words: MoS2, 1T phase, Ionic liquid, Zinc ion battery, Hydrothermal synthesis

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