3D Macroscopic Architectures from Self‐Assembled MXene Hydrogels

By Tongxin Shang, Zifeng Lin, Changsheng Qi, Xiaochen Liu, Pei Li, Ying Tao, Zhitan Wu, Dewang Li, P. Simon, Quan-hong Yang. Advanced Functional Materials, 2019

429 citations recorded by the source corpus.

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.

Subfields: Biomedical Engineering, Electronic, Optical and Magnetic Materials, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/a3391856de0c544bf24561e1492f2210a45fdb56

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In Biomedical Engineering

1. Edward Matios
2. Huan Wang
3. Weiyang Li
4. Jianmin Luo
5. Xinyong Tao

In Electronic, Optical and Magnetic Materials

1. Edward Matios
2. Huan Wang
3. Weiyang Li
4. Jianmin Luo
5. Xinyong Tao

In Materials Chemistry

1. Edward Matios
2. Huan Wang
3. Weiyang Li
4. Jianmin Luo
5. Xinyong Tao

Citations in the corpus

• Interfacial structure design of MXene‐based nanomaterials for electrochemical energy storage and conversion (2020, methodology): “Yang et al synthesized a 3D MXene hydrogel by a facile self-assembly method in the presence of GO and ethylenediamine (EDA) (Figure 5G).(75) During the gelation, GO acts as a crosslinking agent and EDA acts as an initiator for inducing MXene flakes to form the hydrogel with unique 3D porous structur”