Performance Evaluation of Graphene Oxide Based Co3O4@GO, MnO2@GO and Co3O4/MnO2@GO Electrodes for Supercapacitors

Obodo Raphael M.; Onah Emmanuel O.; Nsude Hope E.Agbogu AdaNwanya Assumpta C.Ahmad IshaqZhao TingkaiEjikeme Paul M.Maaza M.Ezema Fabian I.

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Performance Evaluation of Graphene Oxide Based Co3O4@GO, MnO2@GO and Co3O4/MnO2@GO Electrodes for Supercapacitors

机译：Performance Evaluation of Graphene Oxide Based Co3O4@GO, MnO2@GO and Co3O4/MnO2@GO Electrodes for Supercapacitors

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Hydrothermally synthesized electrodes of Co3O4@GO, MnO2@GO and Co3O4/MnO2@GO were produced for usages in supercapacitors. Graphene oxide (GO) was incorporated in the nanocomposites used for electrodes synthesis due to its great surface area and electrical conductivity. The synergistic alliance among these composites and GO enhance electrodes performance, life span and stability. The structural properties as obtained from the X-ray diffraction (XRD) results suggest that nanocomposites are crystalline in nature. The morphological studies indicated that the nanocomposites have platelet nanoparticles with some agglomerations. The energy bandgaps estimated for the Co3O4@GO, MnO2@GO and Co3O4/MnO2@GO are 2.38 eV, 2.05 eV and 2.33 eV respectively The electrochemical studies provided highest specific capacitance from CV using 10 mV/s scan rates and GCD using 1.0 A/g current density were 765, 1215, 1518 and 975, 1358, 1718 F/g for Co3O4@GO, MnO2@GO and Co3O4/MnO2@GO respectively. These results obviously indicate that composites perform better than single transition metal oxide and the addition of graphene oxide enhanced electrodes performance.

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《Electroanalysis》 |2020年第12期|2786-2794|共9页
作者
Obodo Raphael M.; Onah Emmanuel O.; Nsude Hope E.Agbogu AdaNwanya Assumpta C.Ahmad IshaqZhao TingkaiEjikeme Paul M.Maaza M.Ezema Fabian I.;
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作者单位

Univ Nigeria, Dept Phys & Astron, Nsukka 410001, Enugu State, Nigeria;

Natl Ctr Phys, Islamabad 44000, Pakistan;

Northwestern Polytech Univ, NPU NCP Joint Int Res Ctr Adv Nanomat & Defects E, Xian 710072, Peoples R ChinaUniv Nigeria, Dept Pure & Ind Chem, Nsukka 410001, NigeriaiThemba LABS Natl Res Fdn, Nanosci African Network NANOAFNET, 1 Old Faure Rd,POB 722, ZA-7129 Somerset West, Western Cape Pr, South Africa;

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正文语种英语
中图分类电化学、电解、磁化学;
关键词
Hydrothermal; Electrodes; Graphene Oxide; Supercapacitor;

Performance Evaluation of Graphene Oxide Based Co3O4@GO, MnO2@GO and Co3O4/MnO2@GO Electrodes for Supercapacitors

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