| Full text | |
| Author(s): |
de Oliveira Cremonezzi, Josue Marciano
[1, 2]
;
Tiba, Daniel Yaezu
[1, 2]
;
Domingues, Sergio Humberto
[1, 2]
Total Authors: 3
|
| Affiliation: | [1] Univ Prebiteriana Mackenzie, MackGraphe Graphene & Nanomat Res Ctr, Rua Consolacao 896, BR-01302907 Sao Paulo, SP - Brazil
[2] Univ Prebiteriana Mackenzie, Mackenzie Sch Engn, Sao Paulo, SP - Brazil
Total Affiliations: 2
|
| Document type: | Journal article |
| Source: | SN APPLIED SCIENCES; v. 2, n. 10 SEP 12 2020. |
| Web of Science Citations: | 0 |
| Abstract | |
We report a very simple and fast route for a high capacitive birnessite type manganese dioxide (delta-MnO2) synthesis, fully suitable to be applied as electrode in redox-based electrochemical supercapacitors. The material was obtained from a very efficient chemical reduction of potassium permanganate by nascent hydrogen in low temperature acid media. delta-MnO2 was extensively characterized by several techniques confirming the obtainment through the proposed route. The supercapacitive properties of the novel structure were evaluated showing a specific capacitance of 190 F g(-1) at 0.25 A.g(-1). In addition, to the best of our knowledge, this is the first report regarding the chemical synthesis of delta-MnO2 with no dependence of hazardous reducing agent, high temperature or high pressure commonly used to metal oxides production. (AU) | |
| FAPESP's process: | 12/50259-8 - Graphene: photonics and opto-electronics: UPM-NUS collaboration |
| Grantee: | Antonio Helio de Castro Neto |
| Support Opportunities: | Research Projects - SPEC Program |
| FAPESP's process: | 17/21988-5 - Nanocomposites based on graphene derivatives, two-dimensional metal oxides and conjugated polymers for application in flexible energy storage devices |
| Grantee: | Sergio Humberto Domingues |
| Support Opportunities: | Regular Research Grants |