Morphology, structure, and electrochemical properties of the MnOx@CNTs composite: a study of SEM, EDX, XPS, and CVA methods
In this work, we carried out a comprehensive study of the morphology, chemical composition, electronic structure, and electrochemical characteristics of a nanocomposite based on carbon nanotubes (CNTs) and manganese oxide particles. The study of the electronic structure of the nanocomposite, pe...
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| Format: | Article |
| Language: | English |
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Omsk State Technical University, Federal State Autonoumos Educational Institution of Higher Education
2022-04-01
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| Series: | Омский научный вестник |
| Subjects: | |
| Online Access: | https://www.omgtu.ru/general_information/media_omgtu/journal_of_omsk_research_journal/files/arhiv/2022/%E2%84%96%202%20(182)%20(%D0%9E%D0%9D%D0%92)/86-92%20%D0%9A%D0%BE%D1%80%D1%83%D1%81%D0%B5%D0%BD%D0%BA%D0%BE%20%D0%9F.%20%D0%9C.,%20%D0%9D%D0%B5%D1%81%D0%BE%D0%B2%20%D0%A1.%20%D0%9D.,%20%D0%98%D0%B2%D0%BB%D0%B5%D0%B2%20%D0%9A.%20%D0%95..pdf |
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| _version_ | 1832570261229010944 |
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| author | P. M. Korusenko S. N. Nesov K. E. Ivlev |
| author_facet | P. M. Korusenko S. N. Nesov K. E. Ivlev |
| author_sort | P. M. Korusenko |
| collection | DOAJ |
| description | In this work, we carried out a comprehensive study
of the morphology, chemical composition, electronic
structure, and electrochemical characteristics of a
nanocomposite based on carbon nanotubes (CNTs) and
manganese oxide particles. The study of the electronic
structure of the nanocomposite, performed by X-ray
photoelectron spectroscopy (XPS), showed that
manganese is in two chemically nonequivalent states
in MnO2-x and in KMnO4
. It has been established that
manganese oxide is deficient in oxygen. In the course
of electrochemical tests performed by the method
of cyclic voltammetry (CVA), it is shown that the
electrode based on the nanocomposite showed high
arial capacitance values of 320 mF∙cm–2 at a potential
scan rate of 5 mV∙s–1 and a low gravimetric capacitance
of 14 F∙g–1. With an increase in the potential scan
rate, the specific capacitance of the nanocomposite
significantly decreased relative to CNTs, which is due
to a number of reasons: (i) insufficient porosity of the
electrode surface; (ii) a decrease in the amount of MnOx
nanoparticles in the electrode and their dissolution in
the electrolyte during charge-discharge processes. |
| format | Article |
| id | doaj-art-a5cca7b4b7384194a732f69ee1ccb14e |
| institution | Kabale University |
| issn | 1813-8225 2541-7541 |
| language | English |
| publishDate | 2022-04-01 |
| publisher | Omsk State Technical University, Federal State Autonoumos Educational Institution of Higher Education |
| record_format | Article |
| series | Омский научный вестник |
| spelling | doaj-art-a5cca7b4b7384194a732f69ee1ccb14e2025-02-02T15:57:40ZengOmsk State Technical University, Federal State Autonoumos Educational Institution of Higher EducationОмский научный вестник1813-82252541-75412022-04-012 (182)869210.25206/1813-8225-2022-182-86-92Morphology, structure, and electrochemical properties of the MnOx@CNTs composite: a study of SEM, EDX, XPS, and CVA methodsP. M. Korusenko0https://orcid.org/0000-0003-3048-1821S. N. Nesov1https://orcid.org/0000-0003-0421-3356K. E. Ivlev2https://orcid.org/0000-0002-6678-3832Saint Petersburg State UniversityOmsk Scientific Center of SB RASOmsk Scientific Center of SB RASIn this work, we carried out a comprehensive study of the morphology, chemical composition, electronic structure, and electrochemical characteristics of a nanocomposite based on carbon nanotubes (CNTs) and manganese oxide particles. The study of the electronic structure of the nanocomposite, performed by X-ray photoelectron spectroscopy (XPS), showed that manganese is in two chemically nonequivalent states in MnO2-x and in KMnO4 . It has been established that manganese oxide is deficient in oxygen. In the course of electrochemical tests performed by the method of cyclic voltammetry (CVA), it is shown that the electrode based on the nanocomposite showed high arial capacitance values of 320 mF∙cm–2 at a potential scan rate of 5 mV∙s–1 and a low gravimetric capacitance of 14 F∙g–1. With an increase in the potential scan rate, the specific capacitance of the nanocomposite significantly decreased relative to CNTs, which is due to a number of reasons: (i) insufficient porosity of the electrode surface; (ii) a decrease in the amount of MnOx nanoparticles in the electrode and their dissolution in the electrolyte during charge-discharge processes.https://www.omgtu.ru/general_information/media_omgtu/journal_of_omsk_research_journal/files/arhiv/2022/%E2%84%96%202%20(182)%20(%D0%9E%D0%9D%D0%92)/86-92%20%D0%9A%D0%BE%D1%80%D1%83%D1%81%D0%B5%D0%BD%D0%BA%D0%BE%20%D0%9F.%20%D0%9C.,%20%D0%9D%D0%B5%D1%81%D0%BE%D0%B2%20%D0%A1.%20%D0%9D.,%20%D0%98%D0%B2%D0%BB%D0%B5%D0%B2%20%D0%9A.%20%D0%95..pdfcarbon nanotubes (cnts)nanocompositemanganese oxide (mnox @cnts)morphology and electronic structureelectrochemical propertiessupercapacitor |
| spellingShingle | P. M. Korusenko S. N. Nesov K. E. Ivlev Morphology, structure, and electrochemical properties of the MnOx@CNTs composite: a study of SEM, EDX, XPS, and CVA methods Омский научный вестник carbon nanotubes (cnts) nanocomposite manganese oxide (mnox @cnts) morphology and electronic structure electrochemical properties supercapacitor |
| title | Morphology, structure, and electrochemical properties of the MnOx@CNTs composite: a study of SEM, EDX, XPS, and CVA methods |
| title_full | Morphology, structure, and electrochemical properties of the MnOx@CNTs composite: a study of SEM, EDX, XPS, and CVA methods |
| title_fullStr | Morphology, structure, and electrochemical properties of the MnOx@CNTs composite: a study of SEM, EDX, XPS, and CVA methods |
| title_full_unstemmed | Morphology, structure, and electrochemical properties of the MnOx@CNTs composite: a study of SEM, EDX, XPS, and CVA methods |
| title_short | Morphology, structure, and electrochemical properties of the MnOx@CNTs composite: a study of SEM, EDX, XPS, and CVA methods |
| title_sort | morphology structure and electrochemical properties of the mnox cnts composite a study of sem edx xps and cva methods |
| topic | carbon nanotubes (cnts) nanocomposite manganese oxide (mnox @cnts) morphology and electronic structure electrochemical properties supercapacitor |
| url | https://www.omgtu.ru/general_information/media_omgtu/journal_of_omsk_research_journal/files/arhiv/2022/%E2%84%96%202%20(182)%20(%D0%9E%D0%9D%D0%92)/86-92%20%D0%9A%D0%BE%D1%80%D1%83%D1%81%D0%B5%D0%BD%D0%BA%D0%BE%20%D0%9F.%20%D0%9C.,%20%D0%9D%D0%B5%D1%81%D0%BE%D0%B2%20%D0%A1.%20%D0%9D.,%20%D0%98%D0%B2%D0%BB%D0%B5%D0%B2%20%D0%9A.%20%D0%95..pdf |
| work_keys_str_mv | AT pmkorusenko morphologystructureandelectrochemicalpropertiesofthemnoxcntscompositeastudyofsemedxxpsandcvamethods AT snnesov morphologystructureandelectrochemicalpropertiesofthemnoxcntscompositeastudyofsemedxxpsandcvamethods AT keivlev morphologystructureandelectrochemicalpropertiesofthemnoxcntscompositeastudyofsemedxxpsandcvamethods |