Статья

High-Entropy Laminate Metal Carbide (MAX Phase) and Its Two-Dimensional Derivative MXene

Jie ZhouMaterials Design, Department of Physics, Chemistry and Biology (IFM), Linköping University, SE-581 83 Linköping, SwedenQuanzheng TaoMaterials Design, Department of Physics, Chemistry and Biology (IFM), Linköping University, SE-581 83 Linköping, SwedenBilal AhmedMaterials Design, Department of Physics, Chemistry and Biology (IFM), Linköping University, SE-581 83 Linköping, SwedenJustinas PališaitisThin Film Physics, Department of Physics, Chemistry and Biology (IFM), Linköping University, SE-581 83 Linköping, SwedenIngemar PerssonThin Film Physics, Department of Physics, Chemistry and Biology (IFM), Linköping University, SE-581 83 Linköping, SwedenJoseph HalimMaterials Design, Department of Physics, Chemistry and Biology (IFM), Linköping University, SE-581 83 Linköping, SwedenMichel W. BarsoumDepartment of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United StatesPer O. Å. PerssonThin Film Physics, Department of Physics, Chemistry and Biology (IFM), Linköping University, SE-581 83 Linköping, SwedenJohanna RosénMaterials Design, Department of Physics, Chemistry and Biology (IFM), Linköping University, SE-581 83 Linköping, Sweden

2022en

ABI

Аннотация

High-entropy (HE) ceramics, by analogy with HE metallic alloys, are an emerging family of multielemental solid solutions. These materials offer a large compositional space, with a corresponding large range of properties. Here, we report the experimental realization of a 3D HE MAX phase, Ti1,0V0.7Cr0.05Nb1.0Ta1.0AlC3, and a corresponding 2D HE MXene in the form of freestanding flakes of average composition Ti1.1V0.7CrxNb1.0Ta0.6C3Tz (T-z = -F, -O, -OH), as produced by selective removal of AI from the HE MAX phase in aqueous hydrofluoric acid (HF). Initial tests on HE MXene "paper" electrodes show their high potential as electrode materials in supercapacitors through volumetric and gravimetric capacitances of 1688 F/cm(3) and 490 F/g, respectively, originating from a combination of diffusion- and surface-controlled charge storage processes. The introduction of the HE concept into the field of 2D materials suggests a wealth of future 2D materials and applications.

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Идентификаторы

DOI: 10.1021/acs.chemmater.1c03348

Цитирования и источники

Цитирований: 5Использованных источников: 0

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