Enhanced electrochemical properties of cerium metal-organic framework based composite electrodes for high-performance supercapacitor application

Rajendran Ramachandran; Wenlu Xuan; Changhui Zhao; Xiaohui Leng; Dazhi Sun; Dan Luo; Fei Wang

doi:10.1039/c7ra12789h

Enhanced electrochemical properties of cerium metal-organic framework based composite electrodes for high-performance supercapacitor application

RSC Adv. 2018 Jan 17;8(7):3462-3469. doi: 10.1039/c7ra12789h. eCollection 2018 Jan 16.

Authors

Rajendran Ramachandran^{1

2}, Wenlu Xuan¹, Changhui Zhao^{1

2}, Xiaohui Leng^{1

2}, Dazhi Sun³, Dan Luo¹, Fei Wang^{1

2

4}

Affiliations

¹ Department of Electronic and Electrical Engineering, Southern University of Science and Technology Shenzhen 518055 China wangf@sustc.edu.cn.
² Shenzhen Key Laboratory of 3rd Generation Semiconductor Devices Shenzhen 518055 China.
³ Department of Materials Science and Engineering, Southern University of Science and Technology Shenzhen 518055 China.
⁴ State Key Laboratories of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences Shanghai 200050 China.

Abstract

Cerium metal-organic framework based composites (Ce-MOF/GO and Ce-MOF/CNT) were synthesized by a wet chemical route and characterized with different techniques to characterize their crystal nature, morphology, functional groups, and porosity. The obtained Ce-MOF in the composites exhibit a nanorod structure with a size of ∼150 nm. The electrochemical performance of the composites was investigated in 3 M KOH and 3 M KOH + 0.2 M K₃Fe(CN)₆ electrolytes. Enhanced electrochemical behavior was obtained for the Ce-MOF/GO composite in both electrolytes and exhibited a maximum specific capacitance of 2221.2 F g^-1 with an energy density of 111.05 W h kg^-1 at a current density of 1 A g^-1. The large mesoporous structure and the presence of oxygen functional groups in Ce-MOF/GO could facilitate ion transport in the electrode/electrolyte interface, and the results suggested that the Ce-MOF/GO composite could be used as a high-performance supercapacitor electrode material.