MXene Enhanced 3D Needled Waste Denim Felt for High‑Performance Flexible Supercapacitors  

作　　者：Wei Fan Qi Wang Kai Rong Yang Shi Wanxi Peng Handong Li Zhanhu Guo Ben Bin Xu Hua Hou Hassan Algadi Shengbo Ge 

机构地区：[1]Key Laboratory of Functional Textile Material and Product of the Ministry of Education,School of Textile Science and Engineering,Institute of Flexible electronics and Intelligent Textile,Xi’an Polytechnic University,Xi’an 710048,People’s Republic of China [2]Co‑Innovation Center of Efficient Processing and Utilization of Forest Resources,College of Materials Science and Engineering,Nanjing Forestry University,Nanjing 210037,People’s Republic of China [3]Henan Province International Collaboration Lab of Forest Resources Utilization,School of Forestry,Henan Agricultural University,Zhengzhou 450002,People’s Republic of China [4]Integrated Composites Lab,Department of Mechanical and Construction Engineering,Northumbria University,Newcastle Upon Tyne NE18ST,UK [5]College of Materials Science and Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,People’s Republic of China [6]Department of Electrical Engineering,Faculty of Engineering,Najran University,11001 Najran,Saudi Arabia

出　　处：《Nano-Micro Letters》2024年第2期383-394,共12页纳微快报（英文版）

基　　金：The authors acknowledge the financial support from the National Natural Science Foundation of China(Nos.52073224,32201491);the Textile Vision Basic Research Program of China(No.J202110);the Scientific Research Project of Shaanxi Provincial Education Department,China(No.22JC035);the Advanced Manufacturing Technology Program of Xi’an Science and Technology Bureau,China(No.21XJZZ0019);the Research Fund for the Doctoral Program of Xi’an Polytechnic University(No.BS202053);the Youth Innovation Team of Shaanxi Universities and Institute of Flexible electronics and Intelligent Textile.

摘　　要：MXene,a transition metal carbide/nitride,has been prominent as an ideal electrochemical active material for supercapacitors.However,the low MXene load limits its practical applications.As environmental concerns and sustainable development become more widely recognized,it is necessary to explore a greener and cleaner technology to recycle textile by-products such as cotton.The present study proposes an effective 3D fabrication method that uses MXene to fabricate waste denim felt into ultralight and flexible supercapacitors through needling and carbonization.The 3D structure provided more sites for loading MXene onto Z-directional fiber bundles,resulting in more efficient ion exchange between the electrolyte and electrodes.Furthermore,the carbonization process removed the specific adverse groups in MXenes,further improving the specific capacitance,energy density,power density and electrical conductivity of supercapacitors.The electrodes achieve a maximum specific capacitance of 1748.5 mF cm-2 and demonstrate remarkable cycling stability maintaining more than 94%after 15,000 galvanostatic charge/discharge cycles.Besides,the obtained supercapacitors present a maximum specific capacitance of 577.5 mF cm^(-2),energy density of 80.2μWh cm^(-2)and power density of 3 mW cm^(-2),respectively.The resulting supercapacitors can be used to develop smart wearable power devices such as smartwatches,laying the foundation for a novel strategy of utilizing waste cotton in a high-quality manner.

关 键 词：MXene 3D needled waste denim felt SUPERCAPACITORS CARBONIZATION 

分 类 号：TM53[电气工程—电器]