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3D Macroscopic Architectures from Self‐Assembled MXene Hydrogels

Shang, Tongxin and Lin, Zifeng and Qi, Changsheng and Liu, Xiaochen and Li, Pei and Tao, Ying and Wu, Zhitan and Li, Dewang and Simon, Patrice and Yang, Quan‐Hong 3D Macroscopic Architectures from Self‐Assembled MXene Hydrogels. (2019) Advanced Functional Materials, 29 (33). 1903960. ISSN 1616-301X

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Official URL: https://doi.org/10.1002/adfm.201903960

Abstract

Assembly of 2D MXene sheets into a 3D macroscopic architecture is highly desirable to overcome the severe restacking problem of 2D MXene sheets and develop MXene‐based functional materials. However, unlike graphene, 3D MXene macroassembly directly from the individual 2D sheets is hard to achieve for the intrinsic property of MXene. Here a new gelation method is reported to prepare a 3D structured hydrogel from 2D MXene sheets that is assisted by graphene oxide and a suitable reductant. As a supercapacitor electrode, the hydrogel delivers a superb capacitance up to 370 F g−1 at 5 A g−1, and more promisingly, demonstrates an exceptionally high rate performance with the capacitance of 165 F g−1 even at 1000 A g−1. Moreover, using controllable drying processes, MXene hydrogels are transformed into different monoliths with structures ranging from a loosely organized porous aerogel to a dense solid. As a result, a 3D porous MXene aerogel shows excellent adsorption capacity to simultaneously remove various classes of organic liquids and heavy metal ions while the dense solid has excellent mechanical performance with a high Young's modulus and hardness.

Item Type:Article
HAL Id:hal-02520201
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > Collaborative Innovation Center of Chemical Science and Engineering (CHINA)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Other partners > Sichuan University - SCU (CHINA)
Other partners > Tianjin University - TJU (CHINA)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Laboratory name:
Funders:
National Science Fund for Distinguished Young Scholars of China - Fundamental Research Funds for the Central Universities
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Deposited On:26 Mar 2020 14:09

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