Structural, magnetic properties of in-plane chemically ordered (Mo2/3R1/3)2AlC (R = Gd, Tb, Dy, Ho, Er and Y) MAX phase and enhanced capacitance of Mo1.33C MXene derivatives

被引：31
|
作者：
Yang, Jiaxin [1 ]
Yao, Guiquan [1 ]
Sun, Shuli [1 ]
Chen, Zhaohui [1 ]
Yuan, Shuang [2 ]
Wu, Kai [3 ]
Fu, Xiaoxiao [3 ]
Wang, Qiang [1 ]
Cui, Weibin [1 ,4 ]
机构：
[1] Northeastern Univ, Key Lab Electromagnet Proc Mat, Minist Educ, Shenyang 110819, Peoples R China
[2] Northeastern Univ, State Key Lab Rolling & Automat, Shenyang 110819, Peoples R China
[3] Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China
[4] Northeastern Univ, Sch Mat Sci & Engn, Dept Phys & Chem Mat, Shenyang 110819, Peoples R China
来源：
CARBON | 2021年 / 179卷
基金：
中国国家自然科学基金;
关键词：
i-MAX phase; Magnetic properties; Rare-earth elements; MXene; Electrochemical properties; ELECTRODE; LAYERS;
D O I：
10.1016/j.carbon.2021.03.062
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The crystallographic structure of rare-earth-contained (Mo2/3R1/3)(2)AlC (R = Gd, Tb, Dy, Ho, Er and Y) i-MAX phases have been verified to be C-2/c monoclinic. The magnetic behaviors are varied from antiferromagnetism to non-linear ferromagnetism from R = Gd to Ho in (Mo2/3R1/3)(2)AlC i-MAX phases due to variant R-R interactions. The capacitance of Mo1.33C@R MXene derived from different (Mo2/3R1/3)(2)AlC precursors varies from 170 F/g to 228 F/g but can be double by hydrazine monohydrate treatment. The highest one of 431 F/g up to now has been achieved in Mo1.33C@Y-HM MXene, which is caused by the increased fraction of critical -O group evidenced by XPS spectra. Our results illustrate the promising applications in supercapacitor of Mo1.33C MXene derived from R-contained (Mo, R)(2)AlC i-MAX phases. (C) 2021 Elsevier Ltd. All rights reserved.
引用
收藏
页码：104 / 110
页数：7
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