Electrochemical Capacitors and Photovoltaic Applications

A special issue of Micromachines (ISSN 2072-666X). This special issue belongs to the section "C:Chemistry".

Deadline for manuscript submissions: closed (31 August 2023) | Viewed by 1118

Special Issue Editor


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Guest Editor
Instituto de Energías Renovables, Universidad Nacional Autónoma de México, Temixco 62588, Mexico
Interests: energy storage; solar cell materials; alkali metal batteries; ab initio calculations

Special Issue Information

Dear Colleagues,

The development of novel materials intended to be incorporated into electrochemical capacitors and supercapacitors has represented a subject of intense research in recent years. Carbon materials and their composites with metal oxides have been shown to boost double layer capacitance and related properties. Moreover, the pseudocapacitance phenomenology appears to be intimately related to redox processes coming from short-termed reactions in which the electrolyte and the surface phenomena are involved. As a further key factor playing a role in electrochemical capacitors and supercapacitors, quantum capacitance emerges as an intrinsic property that could be definitive to model the energy storage properties of such systems.

In this direction, photovoltaic devices comprise a wide variety of materials in which ternary and quaternary alloys have played a fundamental role in their development. DSSC and perovskites have ultimately represented an alternative for the same purpose. Particularly, the present issue aims to gather outstanding cutting-edge research on electrode materials applied in the fabrication of supercapacitors and help towards a deeper understanding of pseudocapacitance properties. Related works with the incorporation of such materials into a solar cell device, such as a photo-supercapacitor, are also invited. This issue invites both theoretical (ab initio, molecular dynamics and others) and experimental approaches, as well as studies in which both perspectives are combined. 

Dr. Jesús Muñiz-Soria
Guest Editor

Manuscript Submission Information

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Keywords

  • supercapacitors
  • pseudocapacitance
  • photo-supercapacitors
  • electron transport at interfaces
  • ab initio calculations applied to energy conversion and storage
  • molecular dynamics simulations

Published Papers (1 paper)

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Research

13 pages, 2658 KiB  
Article
Decoration of Poly-3-methyl Aniline with As(III) Oxide and Hydroxide as an Effective Photoelectrode for Electroanalytical Photon Sensing with Photodiode-like Behavior
by Mohamed Rabia, Asmaa M. Elsayed and Maha Abdallah Alnuwaiser
Micromachines 2023, 14(8), 1573; https://doi.org/10.3390/mi14081573 - 9 Aug 2023
Cited by 4 | Viewed by 771
Abstract
This study achieved the decoration of poly-3-methyl aniline (P3MA) with As2O3–As(OH)3 using K2S2O8 and NaAsO2 on the 3-methyl aniline monomer. This resulted in a highly porous nanocomposite polymer composite with wide absorption [...] Read more.
This study achieved the decoration of poly-3-methyl aniline (P3MA) with As2O3–As(OH)3 using K2S2O8 and NaAsO2 on the 3-methyl aniline monomer. This resulted in a highly porous nanocomposite polymer composite with wide absorption optical behavior, an average crystalline size of 22 nm, and a 1.73 eV bandgap. The photoelectrode exhibited a great electrical response for electroanalytical applications, such as photon sensing and photodiodes, with a Jph of 0.015 mA/cm2 and Jo of 0.004 mA/cm2. The variable Jph values ranged from 0.015 to 0.010 mA/cm2 under various monochromatic filters from 340 to 730 nm, which demonstrates high sensitivity to wavelengths. Effective photon numbers were calculated to be 8.0 × 1021 and 5.6 × 1021 photons/s for these wavelength values, and the photoresponsivity (R) values were 0.16 and 0.10 mA/W, respectively. These high sensitivities make the nanocomposite material a promising candidate for use in photodetectors and photodiodes, with potential for commercial applications in highly technological systems and devices. Additionally, the material opens up possibilities for the development of photodiodes using n- and p-type materials. Full article
(This article belongs to the Special Issue Electrochemical Capacitors and Photovoltaic Applications)
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