Liu Jie, Xia Qixun, Wang Libo, Hu Qianku, Shinde Nanasaheb M, Zhou Aiguo
School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo, Henan 454003, China.
Henan Province Expressway Efficient Energy Storage Technology and Application Engineering Research Center, Yulong Town, Xingyang, Zhengzhou, Henan 450121, China.
ACS Appl Mater Interfaces. 2024 Sep 18;16(37):49380-49391. doi: 10.1021/acsami.4c09616. Epub 2024 Sep 3.
MoCT MXene materials, known for their high conductivity and abundant surface functional groups, are widely utilized as electrode materials in supercapacitors. However, their tendency to stack during electrochemical energy storage hinders their performance. The in situ growth of nanorod-shaped Ni,Co bimetallic metal-organic frameworks (Ni,Co-MOF) on MoCT MXene effectively mitigates this stacking. With their porous structure and high specific surface area, MOFs excel in energy storage, and bimetallic MOFs outperform monometallic ones. The synergy between MoCT MXene and Ni,Co-MOF yields an outstanding performance. In a three-electrode system with 1 M KOH, the MoCT/Ni,Co-MOF composite shows a specific capacitance of 58 mAh g (56.26 mAh cm) at 1 A g. When used in a MoCT/Ni,Co-MOF//AC asymmetric supercapacitor, it achieves an energy density of 22.7 Wh kg(0.022 Wh cm) at a power density of 293 W kg (0.284 W cm). Future work will focus on enhancing synthesis methods, exploring different bimetallic combinations, and optimizing electrode designs for gas sensors, batteries, fuel cells, biological sensors, and so on, with outstanding performance and sustainability.
MoCT MXene材料以其高导电性和丰富的表面官能团而闻名，被广泛用作超级电容器的电极材料。然而，它们在电化学储能过程中堆叠的倾向阻碍了其性能。在MoCT MXene上原位生长纳米棒状的镍钴双金属金属有机框架（Ni,Co-MOF）有效地减轻了这种堆叠现象。MOF具有多孔结构和高比表面积，在储能方面表现出色，双金属MOF比单金属MOF性能更优。MoCT MXene与Ni,Co-MOF之间的协同作用产生了出色的性能。在含有1 M KOH的三电极体系中，MoCT/Ni,Co-MOF复合材料在1 A g电流密度下的比电容为58 mAh g（56.26 mAh cm）。当用于MoCT/Ni,Co-MOF//AC非对称超级电容器时，在功率密度为293 W kg（0.284 W cm）时，其能量密度达到22.7 Wh kg（0.022 Wh cm）。未来的工作将集中在改进合成方法、探索不同的双金属组合以及优化用于气体传感器、电池、燃料电池、生物传感器等的电极设计，以实现卓越的性能和可持续性。
