In‐Plane Chemical Ordering (Mo2/3R1/3)2AlB2 (R = Tb, Dy, Ho, Er, Tm, and Lu) i‐MAB Phases and their Two‐Dimensional Derivatives (MBene): Synthesis, Structure, Magnetic, and Supercapacitor Performance
Author:
Chong He12ORCID,
Chen Zhaohui12,
Guo Hongyun12,
Zhao Ni12,
Yao Guiquan12,
Yang Jiaxin12,
Deng Wenyu3,
Lu Yanjun3,
Qi Lijun3,
Yu Tao4,
Wang Qiang1,
Cui Weibin12ORCID
Affiliation:
1. Key Laboratory of Electromagnetic Processing of Materials Ministry of Education Northeastern University Shenyang 110819 China
2. Department of Physics and Chemistry of Materials School of Material Science and Engineering Northeastern University Shenyang 110819 China
3. Shenyang General Magnetic Co., Ltd. Hunnan District Shenyang 110167 China
4. Shenzhen Shaanxi Coal Hi‐tech Research Institute Co., Ltd. Guangming District Shenzhen 518107 China
Abstract
AbstractA family of hexagonal in‐plane chemical ordering (Mo2/3R1/3)2AlB2 (R = Tb, Dy, Ho, Er, Tm, and Lu) i‐MAB phases are synthesized with R‐3m hexagonal structure. The i‐MAB phases with R = Tb to Tm are considered to have a nonlinear ferromagnetic‐like coupling magnetic ground state with gradually weakened magnetocrystalline anisotropy due to variant R‐R distances and 4f electrons. Their 2D derivatives (2D‐MBene) with rare‐earth (R) atom vacancies are obtained by chemical etching. The delamination solvent, surface functional terminations, and chemical bond of 2D‐MBene can be modified by one‐step nitridation in environment‐friendly nitrogen instead of ammonia. A phase conversion is caused by nitridation at 973 K from 2D‐MBene to Mo2N, leading to the optimized specific capacitance of 229 F g−1. Besides exploring more rare‐earth‐containing laminated boride systems, this work also demonstrates the promising application of their 2D derivatives with R vacancies in supercapacitors.
Funder
National Natural Science Foundation of China
Fundamental Research Funds for the Central Universities
Shenyang National Laboratory for Materials Science
Subject
Biomaterials,Biotechnology,General Materials Science,General Chemistry
Cited by
1 articles.
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