A dual-control strategy based on electrode material and electrolyte optimization to construct an asymmetric supercapacitor with high energy density

Xianyu Chu; Fanling Meng; Wei Zhang; He Yang; Xu Zou; Sebastian Molin; Piotr Jasinski; Xiangcheng Sun; Weitao Zheng

doi:10.1088/1361-6528/ac4eb1

A dual-control strategy based on electrode material and electrolyte optimization to construct an asymmetric supercapacitor with high energy density

Nanotechnology. 2022 Feb 21;33(20). doi: 10.1088/1361-6528/ac4eb1.

Authors

Xianyu Chu^{1

2}, Fanling Meng¹, Wei Zhang¹, He Yang¹, Xu Zou¹, Sebastian Molin³, Piotr Jasinski³, Xiangcheng Sun⁴, Weitao Zheng¹

Affiliations

¹ Key Laboratory of Mobile Materials MOE, and School of Materials Science & Engineering, and Jilin Provincial International Cooperation Key Laboratory of High-Efficiency Clean Energy Materials, and Electron Microscopy Center, and International Center of Future Science, Jilin University, Changchun 130012, People's Republic of China.
² Key Laboratory of Preparation and Application of Environmental Friendly Materials of the Ministry of Education, Jilin Normal University, Changchun 130103, Jilin, People's Republic of China.
³ Faculty of Electronics, Telecommunications and Informatics, Gdansk University of Technology, Gdansk 80233, Poland.
⁴ Shandong Nanshan Institute of Science and Technology, Yantai 265700, People's Republic of China.

PMID: 35078166
DOI: 10.1088/1361-6528/ac4eb1

Abstract

Metal-organic frames (MOFs) are regarded as excellent candidates for supercapacitors that have attracted much attention because of their diversity, adjustability and porosity. However, both poor structural stability in aqueous alkaline electrolytes and the low electrical conductivity of MOF materials constrain their practical implementation in supercapacitors. In this study, bimetallic CoNi-MOF were synthesized to enhance the electrical conductivity and electrochemical activity of nickel-based MOF, as well as the electrochemical performance of the CoNi-MOF in multiple alkaline electrolytes was investigated. The CoNi-MOF/active carbon device, as-fabricated with a 1 M KOH electrolyte, possesses a high energy density of 35 W h kg^-1with a power density of 1450 W kg^-1, exhibiting outstanding cycling stability of 95% over 10,000 cycles. The design of MOF-based electrode materials and the optimization selection of electrolytes pave the way for constructing high-performance supercapacitors.

Keywords: electrode; electrolyte; energy density; power density; supercapacitor.