| Full text | |
| Author(s): |
Amaral, Murilo M.
[1, 2]
;
Pinzon, Manuel J. C.
[1, 2]
;
Peterlevitz, Alfredo C.
[1, 2]
;
Rufino Junior, Carlos A.
[1, 2]
;
Da Silva, Leonardo M.
[3]
;
Zanin, Hudson
[1, 2]
Total Authors: 6
|
| Affiliation: | [1] Univ Estadual Campinas, Ctr Innovat New Energies, Adv Energy Storage Div, Carbon Sci Tech Labs, Av Albert Einstein 400, BR-13083852 Campinas, SP - Brazil
[2] Univ Estadual Campinas, Ctr Innovat New Energies, Adv Energy Storage Div, Mfg Grp, Av Albert Einstein 400, BR-13083852 Campinas, SP - Brazil
[3] Fed Univ Jequitinhonha & Mucuris Valley, Lab Fundamental & Appl Electrochem, Dept Chem, Rodovia MGT 367, Km 583, 5000, BR-39100000 Diamantina, MG - Brazil
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | DIAMOND AND RELATED MATERIALS; v. 115, MAY 2021. |
| Web of Science Citations: | 0 |
| Abstract | |
We report here on the performance of quasi-solid-state potassium ion electrolyte filling electrochemical supercapacitors. The electrolyte is composed of aqueous-based polyvinyl alcohol with potassium and sulfate ions. This electrolyte is first investigated filling the coin cells with two identical multi-walled carbon nanotube buckypapers as the electrode materials, and later, it was analyzed in a pouch cell. Our electrochemical results, obtained from different techniques, show that the cell's working voltage window is as wide as 1.6 V, yielding a volumetric capacitance of 18 F cm-3, and equivalent series resistance smaller than 2.5 omega. We prepare a pouch cell with our best coin cell findings to investigate the cell's mechanical behavior. Our findings showed that quasi-solid-state potassium ion-based supercapacitors are highly flexible and robust, thus encouraging further investigation on the development of flexible supercapacitors to be applied on various wearable and bendable devices. (AU) | |
| FAPESP's process: | 17/11958-1 - CINE - Advanced Energy Storage Division |
| Grantee: | Rubens Maciel Filho |
| Support Opportunities: | Research Grants - Research Centers in Engineering Program |
| FAPESP's process: | 14/02163-7 - Development of supercapacitors devices from graphene, carbon nanotubes and diamonds |
| Grantee: | Hudson Giovani Zanin |
| Support Opportunities: | Research Grants - Young Investigators Grants |