Self-Assembled MXene Supported on Carbonization-Free Wood for a Symmetrical All-Wood Eco-Supercapacitor

作     者：Yu, Yuan Chen, Wei-Hsin Wang, Xin Sun, Xiaohan Jiang, Zishuai Li, Meichen Fu, Xinmiao Yang, Haiyue Li, Menggang Wang, Chengyu 

作者机构：Key Laboratory of Bio-Based Material Science and Technology of Ministry of Education Northeast Forestry University Harbin150040 China Department of Aeronautics and Astronautics National Cheng Kung University Tainan701 Taiwan School of Materials Science and Engineering Peking University Beijing100871 China 

出 版 物：《ACS Applied Materials and Interfaces》 (ACS Appl. Mater. Interfaces)

年 卷 期：2024年第16卷第28期

页      面：36322-36332页

核心收录：

学科分类：080701[工学-工程热物理] 0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 0817[工学-化学工程与技术] 08[工学] 0807[工学-动力工程及工程热物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0822[工学-轻工技术与工程] 0702[理学-物理学] 

基　　金：This work was supported by the National Key R&D Program of China (2023YFD2201403) and the National Natural Science Foundation of China (Grant Nos. 32171693 and 52303361) 

主　　题：Capacitance 

摘      要：As an emerging two-dimensional (2D) material, MXene has garnered significant interest in advanced energy storage systems, yet the stackable structure, poor mechanical stability, and lack of moldability limit its large-scale applications. To address this challenge, herein, the self-assembly of MXene on carbonization-free wood was obtained to serve as high-performance electrodes for symmetrical all-wood eco-supercapacitors by a steam-driven self-assembly method. This method can be implemented in a low-temperature environment, significantly simplifying traditional high-temperature annealing processes and generating minimal impact on the environment, human health, and resource consumption. The environmentally friendly steam-driven self-assembly strategy can be further extended into various wood-based electrodes, regardless of the types and structures of wood. As a typical platform electrode, the optimized MXene@delignified balsa wood (MDBW) achieves high areal capacitance and specific capacitance values of 2.99 F cm-2 and 580.55 F g-1 at an extensive mass loading of 5.16 mg cm-2, respectively, with almost loss-free capacitance after 10,000 cycles at 50 mA cm-2. In addition, an all-solid-state symmetrical all-wood eco-supercapacitor was further assembled based on MDBW-20 as both positive and negative electrodes to achieve a high energy density of 19.22 μWh cm-2 at a power density of 0.58 mW cm-2. This work provides an effective strategy to optimize wood-based electrodes for the practical application of biomass eco-supercapacitors. © 2024 American Chemical Society.