文献类型：期刊文献

英文题名：A coupled conductor of ionic liquid with Ti3C2 MXene to improve electrochemical properties

作者：Yan, Fangfang[1,2];Zhang, Chuan[3];Wang, Haiyan[1];Zhang, Xiaguang[1];Zhang, Hucheng[1];Jia, Huanli[1,2];Zhao, Yang[1];Wang, Jianji[1]

第一作者：Yan, Fangfang

通讯作者：Zhang, HC[1];Wang, JJ[1]

机构：[1]Henan Normal Univ, Collaborat Innovat Ctr Henan Prov Green Mfg Fine, Key Lab Green Chem Media & React, Minist Educ,Sch Chem & Chem Engn, Xinxiang 453007, Henan, Peoples R China;[2]Xinxiang Univ, Sch 3D Printing, Xinxiang 453003, Henan, Peoples R China;[3]Univ Houston, Dept Biomed Engn, Houston, TX 77204 USA

第一机构：Henan Normal Univ, Collaborat Innovat Ctr Henan Prov Green Mfg Fine, Key Lab Green Chem Media & React, Minist Educ,Sch Chem & Chem Engn, Xinxiang 453007, Henan, Peoples R China

通讯机构：[1]corresponding author), Henan Normal Univ, Collaborat Innovat Ctr Henan Prov Green Mfg Fine, Key Lab Green Chem Media & React, Minist Educ,Sch Chem & Chem Engn, Xinxiang 453007, Henan, Peoples R China.

年份：2021

卷号：9

期号：1

起止页码：442-452

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY A

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000607307900028)】；

基金：This work is supported by the National Natural Science Foundation of China (21573059 and U1704251), and by the "111" Project (no. D17007).

语种：英文

外文关键词：Electron transport properties - Ionic liquids

摘要：Ti3C2Tx MXene is regarded as a promising material in energy-related applications; however, the overscreening charge effect of the electric double layer on electrified interfaces, along with "inert" F terminations, limits the electrochemical operation efficiencies. Here, we developed a protocol to harvest a coupled conductor through confining in situ 1-ethyl-3-methylimidazolium ([Emim](+)) ions into Ti3C2Tx interlayers. The ionic-electronic coupling does not require any external counterions, but activates terminal F and even sub-surface Ti, and endows the conductor with metal-like and ionophilic characteristics. Different from physically preintercalated or adsorbed ions, the resulting chemically confined [Emim](+) ions offer more accessible electroactive sites, faster electron transport in surface redox, and more efficient channels for ion transfer. Hence, the Ti3C2Tx electrodes present high gravimetric capacitance, rate performance and cycling stability. This work highlights the important roles of the coupling in the design and research of mixed ionic-electronic conductors with high electrochemical activity.