Synthesis and electrochemical investigation of hetero bimetallic complexes CoMn2O4 micro rods for novel supercapacitor electrode

M. Murugesan; N. Nallamuthu; R. Ranjithkumar; M. Krishnakumar; P. Devendran; K. Ramesh

doi:https://doi.org/10.1007/s13391-022-00380-6

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자료유형: 학술저널

저자정보: M. Murugesan (Kalasalingam Academy of Research and Education) N. Nallamuthu (Kalasalingam Academy of Research and Education) R. Ranjithkumar (Kalasalingam Academy of Research and Education) M. Krishnakumar (Kalasalingam Academy of Research and Education) P. Devendran (Kalasalingam Academy of Research and Education) K. Ramesh (Indian Institute of Science)

저널정보: 대한금속·재료학회 Electronic Materials Letters Electronic Materials Letters Vol.19 No.1

발행연도: 2023.1

수록면: 108 - 118 (11page)

DOI: https://doi.org/10.1007/s13391-022-00380-6

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Supercapacitors have been emerging tool with high power density in energy storage system. The energy storage capabilityof supercapacitors depends on electrochemical performance of transition metal oxide based electrode materials. Becauseof the co-existence of two metal ions and synergistic eff ects of elements, binary metal oxides, AB 2 O 4 (A or B = Ni, Co,Mo, Mn, and so on), have more active reaction sites and high electrical conductivity than other binary transition metaloxides. To improve the best electrochemical performance, cobalt manganese oxide (CoMn 2 O 4 ) is synthesized via simplehydrothermal method. The CoMn 2 O 4 rod is characterized to analyse its crystalline structure, functional group vibrations,surface morphology and elemental conformations. The electrochemical performance of CoMn 2 O 4 is analysed using cyclicvoltammetry, galvano-static charge–discharge and electrochemical impedance spectrum techniques. The cyclic voltammetryresult reveals that pseudo capacitive behaviour of CoMn 2 O 4 compound. The charge–discharge cycling stability of CoMn 2 O 4rod is analysed in 5 A g −1 up to 10,000 cycles. Asymmetric supercapacitor is fabricated using CoMn 2 O 4 || Activated Carbonwhich also obeys pseudo capacitive behaviour. The energy density is analysed as 28.7 Wh kg −1 at current density 1 mA forasymmetric supercapacitor device.

#Supercapacitor · CoMn 2 O 4 · Hydrothermal method · Cyclic voltammetry · Hetero bimetallic complex

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