Projects / Programmes
Carbon nanowalls for future supercapacitors
Code |
Science |
Field |
Subfield |
2.09.00 |
Engineering sciences and technologies |
Electronic components and technologies |
|
Code |
Science |
Field |
T150 |
Technological sciences |
Material technology |
Code |
Science |
Field |
2.05 |
Engineering and Technology |
Materials engineering |
carbon nanowalls, rapid synthesis, CO2 plasma, deposition, mechanisms of deposition, supercapacitors
Researchers (18)
no. |
Code |
Name and surname |
Research area |
Role |
Period |
No. of publicationsNo. of publications |
1. |
18271 |
PhD Miha Čekada |
Materials science and technology |
Researcher |
2019 - 2022 |
441 |
2. |
18635 |
Tatjana Filipič |
|
Technical associate |
2019 - 2022 |
24 |
3. |
15601 |
Jožko Fišer |
|
Technical associate |
2019 - 2022 |
12 |
4. |
51483 |
Blaž Kaplan |
|
Researcher |
2019 - 2022 |
0 |
5. |
15703 |
PhD Janez Kovač |
Electronic components and technologies |
Researcher |
2019 - 2022 |
672 |
6. |
52051 |
PhD Dane Lojen |
Electronic components and technologies |
Junior researcher |
2019 - 2022 |
13 |
7. |
10429 |
PhD Miran Mozetič |
Electronic components and technologies |
Researcher |
2019 - 2022 |
1,353 |
8. |
26463 |
PhD Matjaž Panjan |
Electronic components and technologies |
Researcher |
2019 - 2022 |
222 |
9. |
51482 |
Andrej Petrič |
|
Technical associate |
2019 - 2022 |
0 |
10. |
06527 |
Branko Petrič |
Electric devices |
Researcher |
2019 - 2022 |
23 |
11. |
33326 |
PhD Gregor Primc |
Electronic components and technologies |
Researcher |
2019 - 2022 |
265 |
12. |
34451 |
PhD Nina Recek |
Biotechnology |
Researcher |
2019 - 2022 |
85 |
13. |
29669 |
Majda Rus |
Electric devices |
Researcher |
2019 - 2022 |
0 |
14. |
31482 |
Jure Slovša |
|
Technical associate |
2019 - 2022 |
0 |
15. |
52497 |
Maja Šukarov |
|
Technical associate |
2019 - 2022 |
0 |
16. |
17622 |
Janez Trtnik |
|
Technical associate |
2019 - 2022 |
18 |
17. |
20048 |
PhD Alenka Vesel |
Electronic components and technologies |
Head |
2019 - 2022 |
689 |
18. |
50893 |
Matjaž Zupan |
Electric devices |
Researcher |
2019 |
0 |
Organisations (3)
Abstract
Inductively coupled radio-frequency gaseous plasma (ICP) will be used for a rapid deposition of vertically oriented graphene sheets (thereafter: carbon nanowalls). The structure will be suitable for fabrication of electrostatic double layer capacitors of superior properties. The carbon nanowalls will be deposited from precursors synthesized in-situ in a plasma reactor by interaction between reactive gaseous species created in plasma of a moderate ionization fraction typical for ICP in the H-mode. Working gas will be carbon dioxide. Radicals such as O atoms and CO molecules in excited states will interact with a graphite placed inside the reaction chamber to form metastable oxocarbon molecules of a large C/O ratio. The oxocarbon molecules will diffuse in the reaction chamber until they rich the substrate where they will decompose and provide building blocks for carbon nanowalls. The desired growth rate will be of the order of 100 nm/s what is orders of magnitude larger than in the case of the growth using a typical plasma-enhanced chemical vapour deposition (PECVD) with hydrocarbon precursors which is used nowadays. The properties of carbon nanowalls will be studied versus the discharge parameters. The goal is optimization of technology to synthesize about 5 micrometers thick layer of carbon nanowalls uniformly over the substrate area of about 100 cm2 in the time scale of about 10 s. The best deposition conditions in terms of uniformity, growth rate and properties of carbon nanowalls as well as energy efficiency will be determined experimentally. Thorough characterization of samples deposited at various conditions will enable drawing correlations between discharge parameters and deposition kinetics. Also plasma will be characterized in details what will enable drawing correlations between plasma parameters and properties of the deposited nanowalls. The samples will be further treated with mild gaseous plasma to obtain superior surface properties including the wettability which will be tailored almost arbitrary between super-hydrophobic and super-hydrophilic surface finish. Commercially interesting solutions will be protected by a patent application, while scientific aspects will be prepared as scientific papers which will be submitted to renowned multidisciplinary journals.
Significance for science
The scientific breakthrough is a completely new approach to synthesis of highly oriented carbon nanomaterials. To the best of our knowledge there is no report on application of metastable gaseous molecules containing oxocarbons for synthesizing thin films of carbon nanowalls in scientific literature. Almost all authors use CHx radicals for synthesizing carbon nanowalls. Expected results will be publications in prestigious multidisciplinary journals with a very high impact factor.
To be more specific, we shall disclose a completely new approach to deposition of highly oriented structures by Plasma Enhanced Chemical Vapour Deposition (PECVD). The current approach is introduction of gaseous precursors in a reaction chamber and their radicalization upon plasma conditions to desired radicals. The radicals then condense on a substrate to form solid films. Our approach is to introduce a simple gas (carbon dioxide) into a reaction chamber, radicalize it and allow said radicals (in particular O and CO) to react with a surface of heated graphite to form molecules that are rarely reported in scientific literature.
A good overview of proved and hypothetical oxocarbons is presented in Wikipedia https://en.wikipedia.org/wiki/Oxocarbon . Linear carbon dioxides and monoxides have been proved to exist (despite they are unstable) but it is unlikely to be formed on a surface of graphite. Graphene oxides have been synthesized and used by numerous authors including members of our group but they are solid and have very low vapour pressure at temperatures involved in our experiments. We propose so far unknown oxocarbons which form on the graphite surface, desorb from the graphite at elevated temperature (between 500 and 1000 °C), are rather stable in the gas phase and decompose on heated metallic surfaces to form carbon nanowalls.
Significance for the country
The results of the proposed project will enable our industrial partner and co-financer of this project a critical estimation of the applicability of innovative technology for deposition of carbon nanowalls on industrial scale. If the results are according to hypothesis and we reach the goal of uniform coatings on a surface of 100 cm2 obtained in a treatment time of about 10 s, the company will invest in further industrial research with the goal of developing a device for deposition of carbon nanowalls on substrates in the continuous mode. The company Iskra Kondenzatorji (translates as “Spark – Capacitors”) has a solid market share in specific types of capacitors – almost all production is exported and an important market is East Asia. The company has ambitious plans to enter the niche of super-capacitors whose market potential is regarded enormous. At present, the market for supercapacitors is still a small niche market of total sales in 2016 just over 400 million USD. In 2016, IDTechEx forecasted sales to grow to $2 billion by 2026, an annual increase of about 24%. https://www.idtechex.com/research/reports/supercapacitor-technologies-and-markets-2018-2028-000568.asp The limiting factor is definitely the price. The technology which will be investigated within the proposed project promises much lower costs than for current supercapacitors. As explained in the project description, our innovative technique will use carbon dioxide as the working gas and graphite as the source of oxocarbon precursors, so material costs will be marginal. The major costs are attributed to electricity for powering RF generators, but the efficiency could be improved during the phase of industrial research which will hopefully start even before accomplishing this applied project.
Most important scientific results
Interim report
Most important socioeconomically and culturally relevant results
Interim report