Nanoporous Silicon with Graphene-like Coating for Pseudocapacitor Application
This paper presents the results of studies of the nanoporous silicon structure, both with different pore depths (up to 180 μm) and with layers in which a graphene-like coating was synthesized on the inner surface of the pores. The nanoporous layers were characterized by SEM as well as IR and Raman s...
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MDPI AG
2022-06-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/12/13/2191 |
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| author | Daria M. Sedlovets Anton P. Naumov Victor I. Korotitsky Vitaly V. Starkov |
| author_facet | Daria M. Sedlovets Anton P. Naumov Victor I. Korotitsky Vitaly V. Starkov |
| author_sort | Daria M. Sedlovets |
| collection | DOAJ |
| description | This paper presents the results of studies of the nanoporous silicon structure, both with different pore depths (up to 180 μm) and with layers in which a graphene-like coating was synthesized on the inner surface of the pores. The nanoporous layers were characterized by SEM as well as IR and Raman spectroscopy. Cyclic voltammetry and galvanostatic charge–discharge data in 3 M H<sub>2</sub>SO<sub>4</sub> are presented as well as the results of the cyclic stability of these characteristics for the nanoporous structure. It was found that the degree of electrolyte pre-impregnation significantly affected the electrochemical processes, and the capacitance values depended on the depth (thickness) of the nanoporous layer. Increasing the thickness of the porous layer led to an increase in area-normalized pseudocapacity and was limited only by the mechanical strength of the structure. Performance improvement was also achieved by synthesis of the graphene-like layer in the volume of the nanoporous structure. The electrodes (composite materials) proposed in the work showed one of the best capacitive characteristics (87 mF/cm<sup>2</sup> with 100% capacity retention after 15,000 cycles) in comparison with the data reported in the literature at present. |
| first_indexed | 2024-03-09T04:01:00Z |
| format | Article |
| id | doaj.art-f3bd1ba2abd0483fb528d68671e81c3a |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T04:01:00Z |
| publishDate | 2022-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-f3bd1ba2abd0483fb528d68671e81c3a2023-12-03T14:14:48ZengMDPI AGNanomaterials2079-49912022-06-011213219110.3390/nano12132191Nanoporous Silicon with Graphene-like Coating for Pseudocapacitor ApplicationDaria M. Sedlovets0Anton P. Naumov1Victor I. Korotitsky2Vitaly V. Starkov3Institute of Microelectronics Technology and High-Purity Materials, Russian Academy of Science (IMT RAS), 6 Academician Ossipyan Str., Moscow District, Chernogolovka 142432, RussiaInstitute of Microelectronics Technology and High-Purity Materials, Russian Academy of Science (IMT RAS), 6 Academician Ossipyan Str., Moscow District, Chernogolovka 142432, RussiaInstitute of Microelectronics Technology and High-Purity Materials, Russian Academy of Science (IMT RAS), 6 Academician Ossipyan Str., Moscow District, Chernogolovka 142432, RussiaInstitute of Microelectronics Technology and High-Purity Materials, Russian Academy of Science (IMT RAS), 6 Academician Ossipyan Str., Moscow District, Chernogolovka 142432, RussiaThis paper presents the results of studies of the nanoporous silicon structure, both with different pore depths (up to 180 μm) and with layers in which a graphene-like coating was synthesized on the inner surface of the pores. The nanoporous layers were characterized by SEM as well as IR and Raman spectroscopy. Cyclic voltammetry and galvanostatic charge–discharge data in 3 M H<sub>2</sub>SO<sub>4</sub> are presented as well as the results of the cyclic stability of these characteristics for the nanoporous structure. It was found that the degree of electrolyte pre-impregnation significantly affected the electrochemical processes, and the capacitance values depended on the depth (thickness) of the nanoporous layer. Increasing the thickness of the porous layer led to an increase in area-normalized pseudocapacity and was limited only by the mechanical strength of the structure. Performance improvement was also achieved by synthesis of the graphene-like layer in the volume of the nanoporous structure. The electrodes (composite materials) proposed in the work showed one of the best capacitive characteristics (87 mF/cm<sup>2</sup> with 100% capacity retention after 15,000 cycles) in comparison with the data reported in the literature at present.https://www.mdpi.com/2079-4991/12/13/2191porous silicongraphene-like coatingCVDpseudocapacitorscyclic stability |
| spellingShingle | Daria M. Sedlovets Anton P. Naumov Victor I. Korotitsky Vitaly V. Starkov Nanoporous Silicon with Graphene-like Coating for Pseudocapacitor Application Nanomaterials porous silicon graphene-like coating CVD pseudocapacitors cyclic stability |
| title | Nanoporous Silicon with Graphene-like Coating for Pseudocapacitor Application |
| title_full | Nanoporous Silicon with Graphene-like Coating for Pseudocapacitor Application |
| title_fullStr | Nanoporous Silicon with Graphene-like Coating for Pseudocapacitor Application |
| title_full_unstemmed | Nanoporous Silicon with Graphene-like Coating for Pseudocapacitor Application |
| title_short | Nanoporous Silicon with Graphene-like Coating for Pseudocapacitor Application |
| title_sort | nanoporous silicon with graphene like coating for pseudocapacitor application |
| topic | porous silicon graphene-like coating CVD pseudocapacitors cyclic stability |
| url | https://www.mdpi.com/2079-4991/12/13/2191 |
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