Ti3C2Tx/rGO复合纤维的电化学性能研究
Research on the electrochemical properties of composite fiber Ti3C2Tx/rGO
王晟冕 1望红玉1
作者信息
- 1. 青海大学机械工程学院,青海 西宁 810016
- 折叠
摘要
为了解决Ti3C2Tx层间相互作用力不足的问题,制备具有优良电化学性能的电极材料,本文以二维片层结构的碳化钛(Ti3C2Tx)和氧化石墨烯(GO)作为原料,采用湿法纺丝技术合成Ti3C2Tx/GO纤维,再化学还原制备Ti3C2Tx/还原氧化石墨烯(Ti3C2Tx/rGO)复合纤维,利用场发射扫描电子显微镜、原子力显微镜和多功能X射线光电子能谱仪对原料及Ti3C2Tx/rGO复合纤维进行表征,并测试其电化学性能.结果表明:当纺丝液注射速度为5 mL/h,凝固浴为乙酸,采用22G针头时,纺制出的复合纤维具有较好的连续性,纺丝效果最好.当Ti3C2Tx与GO的质量比为2:8 时,复合纤维表现出最好的电化学性能,在 1 A/cm3 电流密度下,体积与电容的比达到426.15 F/cm3,1 000 圈循环后电容保持率达59％以上.Ti3C2Tx和rGO之间的协同效应和纤维内部褶皱结构为Ti3C2Tx/rGO复合纤维提供了良好的电化学性能和传输特性.本试验制备的复合纤维可为高性能电极材料的设计提供理论指导.
Abstract
In order to solve the problem of insufficient interlayer interaction force of Ti3C2Tx,taking two dimensional layered titanium carbide(Ti3C2Tx)and graphene oxide(GO)as raw materials,Ti3C2Tx/GO fiber is synthesized by wet-spinning technology to prepare electrode materials with excel-lent electrochemical performance.Then,Ti3C2Tx/rGO composite fiber is prepared by chemical reduc-tion.The raw materials and Ti3C2Tx/rGO composite fiber are characterized by adopting field emission scanning electron microscopy(FESEM),atomic force microscopy(AFM)and multifunctional X-ray photoelectron spectroscopy(XPS).Besides,the electrochemical properties of Ti3C2Tx/rGO com-posite fiber are tested.The results show that when the injection speed of spinning solution is 5 mL/h,the coagulation bath is acetic acid,and a 22G needle is used,the spun fiber shows good continuity with the best spinning effect.When the mass ratio of Ti3C2Tx to GO is 2:8,the composite fiber shows the best electrochemical performance.The volume-specific capacitance can reach 426.15 F/cm3 at the current density of 1 A/cm3,and the capacitance retention rate reaches more than 59％after 1 000 cycles.The synergistic effect between Ti3C2Tx and rGO,as well as the wrin-kled structure inside the fiber,provide excellent electrochemical performance and transport characte-ristics for Ti3C2Tx/rGO composite fiber.The composite fiber prepared in this experiment can provide guidance for the design of high performance electrode materials.
关键词
Ti3C2Tx/复合纤维/湿法纺丝/连续性/导电性Key words
Ti3C2Tx/composite fiber/wet-spinning/continuity/conductivity引用本文复制引用
基金项目
青海省科技厅项目(2024-ZJ-761)
出版年
2024
NETL
NSTL
万方数据