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Mechanochemical‐Assisted Synthesis of High‐Entropy Metal Nitride via a Soft Urea Strategy
Author(s) -
Jin Tian,
Sang Xiahan,
Unocic Raymond R.,
Kinch Richard T.,
Liu Xiaofei,
Hu Jun,
Liu Honglai,
Dai Sheng
Publication year - 2018
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201707512
Subject(s) - materials science , metal , supercapacitor , fabrication , nitride , nanotechnology , entropy (arrow of time) , capacitance , chemical engineering , thermodynamics , chemistry , metallurgy , electrode , medicine , alternative medicine , physics , pathology , layer (electronics) , engineering
Crystalline high‐entropy ceramics (CHC), a new class of solids that contain five or more elemental species, have attracted increasing interest because of their unique structure and potential applications. Up to now, only a couple of CHCs (e.g., high‐entropy metal oxides and diborides) have been successfully synthesized. Here, a new strategy for preparing high‐entropy metal nitride (HEMN‐1) is proposed via a soft urea method assisted by mechanochemical synthesis. The as‐prepared HEMN‐1 possesses five highly dispersed metal components, including V, Cr, Nb, Mo, Zr, and simultaneously exhibits an interesting cubic crystal structure of metal nitrides. By taking advantage of these unique features, HEMN‐1 can function as a promising candidate for supercapacitor applications. A specific capacitance of 78 F g −1 is achieved at a scan rate of 100 mV s −1 in 1 m KOH. In addition, such a facile synthetic strategy can be further extended to the fabrication of other types of HEMNs, paving the way for the synthesis of HEMNs with attractive properties for task‐specific applications.