| Full text | |
| Author(s): |
Li, Zhongkai
;
Mathwig, Klaus
;
Arotiba, Omotayo A.
;
Tshwenya, Luthando
;
Neto, Evaldo Batista Carneiro
;
Pereira, Ernesto Chaves
;
Marken, Frank
Total Authors: 7
|
| Document type: | Journal article |
| Source: | CURRENT OPINION IN ELECTROCHEMISTRY; v. 39, p. 8-pg., 2023-04-11. |
| Abstract | |
Ionic diodes have emerged repeatedly in the literature for gel interfaces, for nanopores and channels, for nano-/micro-fluidic systems, and for asymmetrically ionomer-covered microholes. Concentration polarisation is likely to be the key to under-standing the diode function and the diode time constant tdiode, i.e. the time for approaching steady state following a potential/ polarity switch. For frequencies higher than udiode = 2pf = (tdiode)-1, the polarization mechanism is too slow for ion cur-rent rectification. Below the frequency associated with the diode time constant, irreversibility in ion flow is induced and the diode switches between two resistive states at opposite po-tentials ("open" and "closed"). The irreversible flow of ions allows energy conversion from electrical to electrochemical. For energy conversion, two coupled ionic diodes are neces-sary driven by alternating current (AC) electricity to minimise driver electrode electrolysis and energy losses. Opportunities for AC-desalination and for electroosmotic water harvesting with coupled ionic diodes are discussed. (AU) | |
| FAPESP's process: | 21/03592-2 - Finite element modeling and simulation of electrochemical devices |
| Grantee: | Evaldo Batista Carneiro Neto |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 13/07296-2 - CDMF - Center for the Development of Functional Materials |
| Grantee: | Elson Longo da Silva |
| Support Opportunities: | Research Grants - Research, Innovation and Dissemination Centers - RIDC |
| FAPESP's process: | 22/06229-9 - Rectified electroosmotic transport of drugs |
| Grantee: | Evaldo Batista Carneiro Neto |
| Support Opportunities: | Scholarships abroad - Research Internship - Post-doctor |