• Nano-Micro Letters
  • Vol. 15, Issue 1, 231 (2023)
Yongbin Wang1, Ningjun Chen1, Bin Zhou3, Xuefeng Zhou3, Ben Pu1, Jia Bai1, Qi Tang1, Yan Liu1、*, and Weiqing Yang1、2、**
Author Affiliations
  • 1Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, People’s Republic of China
  • 2Research Institute of Frontier Science, Southwest Jiaotong University, Chengdu 610031, People’s Republic of China
  • 3Sichuan Research Center of New Materials, Institute of Chemical Materials, China Academy of Engineering Physics, Chengdu 610200, People’s Republic of China
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    DOI: 10.1007/s40820-023-01204-4 Cite this Article
    Yongbin Wang, Ningjun Chen, Bin Zhou, Xuefeng Zhou, Ben Pu, Jia Bai, Qi Tang, Yan Liu, Weiqing Yang. NH3-Induced In Situ Etching Strategy Derived 3D-Interconnected Porous MXene/Carbon Dots Films for High Performance Flexible Supercapacitors[J]. Nano-Micro Letters, 2023, 15(1): 231 Copy Citation Text show less

    Abstract

    2D MXene (Ti3CNTx) has been considered as the most promising electrode material for flexible supercapacitors owing to its metallic conductivity, ultra-high capacitance, and excellent flexibility. However, it suffers from a severe restacking problem during the electrode fabrication process, limiting the ion transport kinetics and the accessibility of ions in the electrodes, especially in the direction normal to the electrode surface. Herein, we report a NH3-induced in situ etching strategy to fabricate 3D-interconnected porous MXene/carbon dots (p-MC) films for high-performance flexible supercapacitor. The pre-intercalated carbon dots (CDs) first prevent the restacking of MXene to expose more inner electrochemical active sites. The partially decomposed CDs generate NH3 for in situ etching of MXene nanosheets toward 3D-interconnected p-MC films. Benefiting from the structural merits and the 3D-interconnected ionic transmission channels, p-MC film electrodes achieve excellent gravimetric capacitance (688.9 F g-1 at 2 A g-1) and superior rate capability. Moreover, the optimized p-MC electrode is assembled into an asymmetric solid-state flexible supercapacitor with high energy density and superior cycling stability, demonstrating the great promise of p-MC electrode for practical applications.
    Yongbin Wang, Ningjun Chen, Bin Zhou, Xuefeng Zhou, Ben Pu, Jia Bai, Qi Tang, Yan Liu, Weiqing Yang. NH3-Induced In Situ Etching Strategy Derived 3D-Interconnected Porous MXene/Carbon Dots Films for High Performance Flexible Supercapacitors[J]. Nano-Micro Letters, 2023, 15(1): 231
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