Outstanding supercapacitor performance with intertwined flower-like NiO/ MnO2/CNT electrodes


Pecenek H., KILIÇ DOKAN F., ÖNSES M. S. , Yilmaz E., ŞAHMETLİOĞLU E.

MATERIALS RESEARCH BULLETIN, vol.149, 2022 (Peer-Reviewed Journal) identifier identifier

  • Publication Type: Article / Article
  • Volume: 149
  • Publication Date: 2022
  • Doi Number: 10.1016/j.materresbull.2022.111745
  • Journal Name: MATERIALS RESEARCH BULLETIN
  • Journal Indexes: Science Citation Index Expanded, Scopus, Academic Search Premier, Chemical Abstracts Core, INSPEC
  • Keywords: Binary metal oxide, MnO2, NiO, Supercapacitor, ELECTROCHEMICAL PERFORMANCE, NANOCOMPOSITE, COMPOSITE, NICKEL, OXIDES, FABRICATION, NANOSHEETS, COPOLYMER, BEHAVIOR, DESIGN

Abstract

Binary metal oxides have been broadly investigated as a new electrode material for supercapacitor applications owing to their high reversible performance and good conductivity. When compared to a single candidate, the composite's electrochemical performance is considerably improved by the unique mix of pseudo-material and carbon material. Herein, we report a facile and rational synthesis procedure to fabricate a high performance supercapacitor electrode. The prepared NiO/MnO2/ carbon nanotube (CNT) composite has wonderfully stratified flower-like morphology. The positive synergism among components and unique structure has enabled a high specific capacitance of 1320 F/g at 1 A g-1. After 3000 cycles, the supercapacitor maintains more than 90% of its initial capacitance. Moreover, we also successfully prepared a symmetrical supercapacitor which is made up of two pieces of composite electrode separated with a membrane. The findings highlight that NiO/MnO2/CNT composite is highly desirable for future hybrid energy storage applications.