Kinetic regulation of MXene with water-in-LiCl electrolyte for high-voltage micro-supercapacitors

作     者：Yuanyuan Zhu Shuanghao Zheng Pengfei Lu Jiaxin Ma Pratteek Das Feng Su Hui-Ming Cheng Zhong-Shuai Wu Yuanyuan Zhu;Shuanghao Zheng;Pengfei Lu;Jiaxin Ma;Pratteek Das;Feng Su;Hui-Ming Cheng;Zhong-Shuai Wu

作者机构：State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian National Laboratory for Clean EnergyChinese Academy of Sciences University of Chinese Academy of Sciences Shenyang National Laboratory for Materials ScienceInstitute of Metal Research Chinese Academy of Sciences Faculty of Materials Science and Engineering/Institute of Technology for Carbon NeutralityShenzhen Institute of Advanced TechnologyChinese Academy of Sciences Shenzhen International Graduate SchoolTsinghua University 

出 版 物：《National Science Review》 (国家科学评论(英文版))

年 卷 期：2022年第9卷第7期

页      面：97-105页

核心收录：

学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：supported by the National Natural Science Foundation of China (22005297, 22125903, 51872283,22075279 and 22005298) Liao Ning Revitalization Talents Program (XLYC1807153) Liaoning BaiQianWan Talents Program the Central Government of Liaoning Province Guides the Funds for Local Science and Technology Development(2021JH6/10500112) Dalian Innovation Support Plan for High Level Talents (2019RT09) Dalian National Laboratory for Clean Energy (DNL),Chinese Academy of Sciences (CAS),DNL Cooperation Fund,CAS (DNL201912, DNL201915,DNL202016 and DNL202019) Dalian Institute of Chemical Physics (DICP)(DICP ZZBS201708, DICP ZZBS201802and DICP I2020032) Joint Fund of the Yulin University and the Dalian National Laboratory for Clean Energy (YLU-DNL Fund 2021002 and 2021009) China Postdoctoral Science Foundation (2020M680995 and 2019M661141) 

主　　题：MXene micro-supercapacitors water-in-LiCl aqueous high voltage wide temperature 

摘      要：MXenes are one of the key materials for micro-super capacitors（MSCs）,integrating miniaturized energy-storage components with ***,the energy densities of MSCs are greatly hampered by MXenes narrow working potential window（typically≤0.6 V） in aqueous ele ***,we report the fabrication of high-voltage MXene-MSCs through the efficient regulation of reaction kinetics in 2 D Ti3C2TxMXene microelectrodes using a water-in-LiCl（WIL,20 m LiCl） salt gel ***,the intrinsic energy-storage mechanism of MXene microelectrodes in WIL,which is totally different from traditional electrolytes（1 m LiCl）,was revealed through in situ and ex situ *** validated that the suppression of MXene oxidation at high anodic potential occurred due to the high content of WIL regulating anion intercalation in MXene electrodes,which effectively broadened the voltage window of ***,the symmetric planar MXene-MSCs presented a record operating voltage of 1.6 V,resulting in an exceptionally high volumetric energy density of 31.7 mWh *** the ultra-high ionic conductivity(69.5 mS cm-1) and ultralow freezing point（-57℃） of the WIL gel electrolyte, our MSCs could be operated in a wide temperature range of-40 to 60℃,and worked for a long duration even at-40℃,demonstrative of its practicality in extreme environments.