Nanomaterials for Energy Conversion and Storage II

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Energy and Catalysis".

Deadline for manuscript submissions: 20 August 2024 | Viewed by 1723

Special Issue Editor


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Guest Editor
Department of Chemical Engineering, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Republic of Korea
Interests: polymer; metal-organic framework; energy conversion; energy storage; solar cell; (photo)electrochemical cell; supercapacitor; Li-ion battery
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Special Issue Information

Dear Colleagues,

Nanomaterials are key to fundamental advances in energy conversion and storage, both of which are vital for meeting the challenge of global warming and the finite nature of fossil fuels. Nanomaterials offer unique properties or combinations of properties as electrodes and electrolytes in a range of energy conversion and storage devices. One of the key challenges facing the widespread use and commercialization of promising energy conversion and storage devices is the high cost of the electrode and electrolyte materials and inefficiencies in their assembly and utilization.

This Special Issue of Nanomaterials will attempt to address the most recent advances in energy conversion and storage devices based on nanomaterials. We will focus on not only their preparation and characterization but also on reports of their physical/chemical properties to be applied in devices.

Prof. Dr. Jung Tae Park
Guest Editor

Manuscript Submission Information

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Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2900 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • energy conversion
  • energy storage
  • battery
  • supercapacitor
  • water splitting
  • solar cell
  • metal–organic framework
  • polymer
  • electrocatalyst

Published Papers (2 papers)

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Research

12 pages, 2364 KiB  
Article
Amphiphilic Graft Copolymers as Templates for the Generation of Binary Metal Oxide Mesoporous Interfacial Layers for Solid-State Photovoltaic Cells
by Seung Man Lim, Hayeon Jeong, Juyoung Moon and Jung Tae Park
Nanomaterials 2024, 14(4), 352; https://doi.org/10.3390/nano14040352 - 13 Feb 2024
Viewed by 615
Abstract
The binary metal oxide mesoporous interfacial layers (bi-MO meso IF layer) templated by a graft copolymer are synthesized between a fluorine-doped tin oxide (FTO) substrate and nanocrystalline TiO2 (nc-TiO2). Amphiphilic graft copolymers, Poly(epichlorohydrin)-graft-poly(styrene), PECH-g-PS, were used [...] Read more.
The binary metal oxide mesoporous interfacial layers (bi-MO meso IF layer) templated by a graft copolymer are synthesized between a fluorine-doped tin oxide (FTO) substrate and nanocrystalline TiO2 (nc-TiO2). Amphiphilic graft copolymers, Poly(epichlorohydrin)-graft-poly(styrene), PECH-g-PS, were used as a structure-directing agent, and the fabricated bi-MO meso IF layer exhibits good interconnectivity and high porosity. Even if the amount of ZnO in bi-MO meso IF layer increased, it was confirmed that the morphology and porosity of the bi-MO meso IF layer were well-maintained. In addtion, the bi-MO meso IF layer coated onto FTO substrates shows higher transmittance compared with a pristine FTO substrate and dense-TiO2/FTO, due to the reduced surface roughness of FTO. The overall conversion efficiency (η) of solid-state photovoltaic cells, dye-sensitized solar cells (DSSCs) fabricated with nc-TiO2 layer/bi-MO meso IF layer TZ1 used as a photoanode, reaches 5.0% at 100 mW cm−2, which is higher than that of DSSCs with an nc-TiO2 layer/dense-TiO2 layer (4.2%), resulting from enhanced light harvesting, good interconnectivity, and reduced interfacial resistance. The cell efficiency of the device did not change after 15 days, indicating that the bi-MO meso IF layer with solid-state electrolyte has improved electrode/electrolyte interface and electrochemical stability. Additionally, commercial scattering layer/nc-TiO2 layer/bi-MO meso IF layer TZ1 photoanode-fabricated solid-state photovoltaic cells (DSSCs) achieved an overall conversion efficiency (η) of 6.4% at 100 mW cm−2. Full article
(This article belongs to the Special Issue Nanomaterials for Energy Conversion and Storage II)
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16 pages, 3124 KiB  
Article
Improved Thermophysical and Mechanical Properties in LiNaSO4 Composites for Thermal Energy Storage
by Maria Taeño, Ariba Adnan, Cristina Luengo, Ángel Serrano, Jean-Luc Dauvergne, Paola Crocomo, Ali Huerta, Stefania Doppiu and Elena Palomo del Barrio
Nanomaterials 2024, 14(1), 78; https://doi.org/10.3390/nano14010078 - 27 Dec 2023
Cited by 1 | Viewed by 825
Abstract
Solid-solid phase-change materials have great potential for developing compact and low-cost thermal storage systems. The solid-state nature of these materials enables the design of systems analogous to those based on natural rocks but with an extraordinarily higher energy density. In this scenario, the [...] Read more.
Solid-solid phase-change materials have great potential for developing compact and low-cost thermal storage systems. The solid-state nature of these materials enables the design of systems analogous to those based on natural rocks but with an extraordinarily higher energy density. In this scenario, the evaluation and improvement of the mechanical and thermophysical properties of these solid-solid PCMs are key to exploiting their full potential. In this study, LiNaSO4-based composites, comprising porous MgO and expanded graphite (EG) as the dispersed phases and LiNaSO4 as the matrix, have been prepared with the aim of enhancing the thermophysical and mechanical properties of LiNaSO4. The characteristic structure of MgO and the high degree of crystallinity of the EG600 confer on the LiNaSO4 sample mechanical stability, which leads to an increase in the Young’s modulus (almost three times higher) compared to the pure LiNaSO4 sample. These materials are proposed as a suitable candidate for thermal energy storage applications at high temperatures (400–550 °C). The addition of 5 wt.% of MgO or 5% of EG had a minor influence on the solid-solid phase change temperature and enthalpy; however, other thermal properties such as thermal conductivity or specific heat capacity were increased, extending the scope of PCMs use. Full article
(This article belongs to the Special Issue Nanomaterials for Energy Conversion and Storage II)
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