期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 592, 期 -, 页码 95-102出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2021.02.042
关键词
Ni-MOFs microbelts; MXenes; Supercapacitors; Inductive effect
资金
- National Natural Science Foundation of China [21905029]
- China Postdoctoral Science Foundation [2018M631168]
- Fundamental Research Funds for the Central Universities [DUT20LK44]
- Liaoning Key Laboratory of Chemical Additive Synthesis and Separation [ZJKF2010]
- Natural Science Foundation of Liaoning Province [2019-ZD-0020]
An innovative MXene-induced strategy was reported to synthesize Ti3C2Tx/Ni-MOFs for high-performance supercapacitors, showing promising electrochemical performance with improved conductivity and additional electric double layer capacitance. The synergistic effects of 2D MXenes and Ni-MOFs contribute to the rich activity sites for redox reactions and shortened ion transport path, leading to enhanced rate capability and high energy density in supercapacitor applications.
For the sake of developing new energy storage devices for satisfying the energy needs of the modern society, we herein report an innovative MXene-induced strategy to synthesize Ti3C2Tx MXenes/Ni based metal-organic framework composites (Ti3C2Tx/Ni-MOFs) for high-performance supercapacitors. The two-dimensional (2D) MXenes with oxygen-containing groups on the surface can be used as structure-directing agents to tune the Ni-MOFs into 2D microbelts. The presence of MXenes cannot only improve conductivity of the composite but also provide additional electric double layer capacitance and faradaic pseudocapacitance. The 2D Ni-MOF microbelts can offer rich activity sites for the faradaic redox reactions and shorten the ion transport path. Taking advantages of synergistic effects of Ni-MOF microbelts and Ti3C2Tx MXenes, the prepared Ti3C2Tx/Ni-MOFs electrode shows a good electrochemical performance with 1124 F g(-1) at the current density of 1 Ag-1 and 62% rate capability at 20 A g(-1). This work can offer a new insight to design 2D MOF belts as high-performance electrode materials for supercapacitors. (C) 2021 Elsevier Inc. All rights reserved.
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