| Full text | |
| Author(s): |
Amaral, Murilo M.
;
Yukuhiro, Victor Y.
;
Vicentini, Rafael
;
Peterlevitz, Alfredo C.
;
Da Silva, Leonardo M.
;
Fernandez, Pablo
;
Zanin, Hudson
Total Authors: 7
|
| Document type: | Journal article |
| Source: | JOURNAL OF ENERGY CHEMISTRY; v. 71, p. 9-pg., 2022-08-01. |
| Abstract | |
Electrical double-layer capacitors (EDLCs) consist of energy storage devices that present high-power and moderate energy density. The electrolyte and electrode physicochemical properties are crucial for improving their overall energy storage capabilities. Therefore, the stability of the EDLCs' materials is the primary focus of this study. Since energy storage depends on the specific capacitance, and also on the square of the maximum capacitive cell voltage (UMCV). Thus, electrodes with high specific surface area (SSA) and electrolytes with excellent electrochemical stability are commonly reported in the literature. Aqueous electrolytes are safer and green devices compared to other organic-based solutions. On the other hand, their UMCV is reduced compared to other electrolytes (e.g., organic-based and ionic liquids). In this sense, spanning the UMCV for aqueous-based electrolytes is a 'hot topic' research. Unfortunately, the lack of protocols to establish reliable UMCV values has culminated in the publishing of several conflicting results. Herein, we confirm that multiwalled carbon nanotubes (MWCNTs) housed in cells degrade and produce CO2 under abusive polarisation conditions. It is probed by employing electrochemical techniques, in-situ FTIR and in-situ Raman spectroscopies. From these considerations, the current study uses spectro-electrochemical techniques to support the correct determination of the electrode and electrolyte stability conditions as a function of the operating electrochemical parameters. (C)& nbsp;2022 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by ELSEVIER B.V. and Science Press. All rights reserved. (AU) | |
| FAPESP's process: | 16/25082-8 - Development of prototype of energy storer and supplier |
| Grantee: | Lenon Henrique da Costa |
| Support Opportunities: | Scholarships in Brazil - Master |
| 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: | 18/20756-6 - Pseudocapacitors from metal oxides and activated carbon composites |
| Grantee: | Willian Gonçalves Nunes |
| Support Opportunities: | Scholarships in Brazil - Doctorate |
| FAPESP's process: | 20/04431-0 - Perovskite oxides for the continuous and/or simultaneous production of energy and/or dense energy carriers |
| Grantee: | Pablo Sebastián Fernández |
| Support Opportunities: | Program for Research on Bioenergy (BIOEN) - Regular Program Grants |
| FAPESP's process: | 17/11986-5 - Generation and storage of New Energy: bringing technological development for the country |
| Grantee: | Ana Flávia Nogueira |
| 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 |
| FAPESP's process: | 18/02713-8 - Molecular dynamics of confined fluids: equilibrium and transport properties |
| Grantee: | Luís Fernando Mercier Franco |
| Support Opportunities: | Research Grants - Young Investigators Grants |
| FAPESP's process: | 20/04281-8 - Proposal for syntheses, characterization and application of electrodes for Li-S battery like capacitor |
| Grantee: | Érick Alves Santos |
| Support Opportunities: | Scholarships in Brazil - Master |