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Carbon Encapsulated Ternary Mn−Ni−Co Oxide Nanoparticles as Electrode Materials for Energy Storage Applications
Author(s) -
Heliso Dolla Tarekegn,
Lawal Isiaka A.,
Billing Dave G.,
Pruessner Karin,
Ndungu Patrick
Publication year - 2020
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.202060294
Subject(s) - ternary operation , supercapacitor , materials science , nanoparticle , energy storage , electrode , chemical engineering , capacitance , oxide , electrochemistry , carbon fibers , current density , conductivity , composite number , inorganic chemistry , nanotechnology , composite material , metallurgy , chemistry , power (physics) , physics , quantum mechanics , computer science , engineering , programming language
Ternary transition metal oxides are promising advanced materials for use as electrode components in electrochemical energy storage systems. However, low electronic/ionic conductivity hinder practical applications. In this study, ternary Mn−Ni−Co oxide nanoparticles were encapsulated in carbon nanosheets, to improve the electrical conductivity and surface area. When tested as supercapacitor electrodes, the materials exhibited specific capacity of 91.2 mAh g −1 at a current density of 1 A g −1 in 2 M KOH. Moreover, after 3000 cycles the composite achieved a specific capacity of 74.6 mAh g −1 at a current density of 6 A g −1 and high capacitance retention of 96.4 %.