Porous and free-standing Ti3C2Tx-RGO film with ultrahigh gravimetric capacitance for supercapacitors

• Published in: Chinese chemical letters Vol. 31; no. 4; pp. 1004 - 1008
• Main Authors: Fang, Yongzheng, Yang, Bowen, He, Dongtong, Li, Huipeng, Zhu, Kai, Wu, Lin, Ye, Ke, Cheng, Kui, Yan, Jun, Wang, Guiling, Cao, Dianxue
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.04.2020; Key Laboratory of Advanced Chemical Power Sources, Guizhou Meiling Power Sources Co., Ltd., Zunyi 563003, China%Teachers Education College of Harbin Normal University, Harbin 150001, China; Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China%Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China
• Subjects: Cross-linked porous; High capacitance; MXene; RGO; Supercapacitors; Thickness independent; Supercapacitors; RGO; Thickness independent; Cross-linked porous; High capacitance; MXene
• ISSN: 1001-8417; 1878-5964
• DOI: 10.1016/j.cclet.2019.08.043

The cross-linked porous Ti3C2Tx-RGOfilm was designed and synthesized by the micro-explosion reaction. Such a flexible and freestanding Ti3C2Tx-RGO electrode presented an ultrahigh capacitance and remarkable rate performance, which is less effect by mass loading. [Display omitted] MXene-based electrode materials exhibit favorable supercapacitor performance in sulfuric acid due to praised pseudocapacitance charge storage mechanism. However, self-stacking of conventional MXene electrodes severely restricts their electrochemical performance, especially at high loading. Herein, a flexible cross-linked porous Ti3C2Tx-MXene-reduced graphene oxide (Ti3C2Tx-RGO) film is skillfully designed and synthesized by microscopic explosion of graphene oxide (GO) at sudden high temperature. The generated chamber structure between layers could hold a few of electrolyte, leading to a close-fitting reaction at interlayer and avoiding complex ions transmission paths. The Ti3C2Tx-RGO film displayed a preferable rate performance than that of pure Ti3C2Tx film and a high capacitance of 505 F/g at 2 mV/s. Furthermore, the uniform intralayer structure and unique energy storage process lead to thickness-independenct electrochemical performances. This work provides a simple and feasible improvement approach for the design of MXene-based electrodes, which can be spread other electrochemical systems limited by ions transport, such as metal ions batteries and catalysis.