MXenes induced formation of Ni-MOF microbelts for high-performance supercapacitors

Xu Zhang; Shixuan Yang; Wang Lu; Da Lei; Yuhan Tian; Minggang Guo; Panpan Mi; Ning Qu; Yingyuan Zhao

doi:10.1016/j.jcis.2021.02.042

MXenes induced formation of Ni-MOF microbelts for high-performance supercapacitors

J Colloid Interface Sci. 2021 Jun 15:592:95-102. doi: 10.1016/j.jcis.2021.02.042. Epub 2021 Feb 17.

Authors

Xu Zhang¹, Shixuan Yang², Wang Lu², Da Lei², Yuhan Tian², Minggang Guo³, Panpan Mi⁴, Ning Qu², Yingyuan Zhao⁵

Affiliations

¹ State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, China; School of Chemical Engineering, Dalian University of Technology, Panjin 124221, Liaoning, China. Electronic address: zhangxu@dlut.edu.cn.
² State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, China; School of Chemical Engineering, Dalian University of Technology, Panjin 124221, Liaoning, China.
³ Panjin Institute of Industrial Technology, Liaoning Key Laboratory of Chemical Additive Synthesis and Separation, Dalian University of Technology, Panjin 124221, Liaoning, China.
⁴ Panjin Institute of Industrial Technology, Liaoning Key Laboratory of Chemical Additive Synthesis and Separation, Dalian University of Technology, Panjin 124221, Liaoning, China. Electronic address: mipanpan2016@126.com.
⁵ College of Chemical Engineering and Safety, Binzhou University, Binzhou 256603, Shandong, China.

PMID: 33647566
DOI: 10.1016/j.jcis.2021.02.042

Abstract

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 Ti₃C₂T_x MXenes/Ni based metal-organic framework composites (Ti₃C₂T_x/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 Ti₃C₂T_x MXenes, the prepared Ti₃C₂T_x/Ni-MOFs electrode shows a good electrochemical performance with 1124 F g^-1 at the current density of 1 A g ^-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.

Keywords: Inductive effect; MXenes; Ni-MOFs microbelts; Supercapacitors.