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Molecules
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Advanced Heterostructural Nanocomposites for Renewable Energy System
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Advanced Heterostructural Nanocomposites for Renewable Energy System

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Materials Chemistry".

Deadline for manuscript submissions: 30 November 2024 | Viewed by 3323

Special Issue Editors

Dr. Xu Yu

E-Mail Website
Guest Editor
School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 250002, China
Interests: carbon nanomaterials; layered materials; energy storage; energy conversion; heterostructures
Special Issues, Collections and Topics in MDPI journals
Dr. Yingbo Kang

E-Mail Website
Guest Editor
School of Chemical and Environmental Engineering, Liaoning University of Technology, Jinzhou 121001, China
Interests: transition metal composites; carbon materials; lithium/sodium ion battery; electrocatalysts; hierarchical structure

Special Issue Information

Dear Colleagues,

The development of renewable energy systems is considered a promising strategy for the reduction of the pressure of energy consumption. Rational designs of advanced nanocomposites with boosted catalytic activity and redox-active sites become particularly important for the satisfaction of the application of energy-related systems, including energy conversion and reduction, energy storage, etc. Due to the unique heterostructural effects, such as 0D/1D, 0D/2D, 2D/2D, 1D/3D structures, the morphological structure and surface chemistry can be controllably modified via the strong chemical interactions between two different components, which are both favorable to improve the electrochemical performance of electrode materials in energy-related applications.

The scope of this Special Issue aims to publish the latest developments in advanced heterostructural nanocomposites and their applications in renewable energy systems, e.g., lithium-ion batteries, supercapacitors, electrocatalysts, and CO2 reduction. It will be helpful to strengthen the relationship between academic knowledge and practical applications, providing novel ideas to expand the scope of the applications of these technologies. The advanced nanocomposites in this Special Issue are listed below.

  1. Heterostructured carbon-based nanocomposites.
  2. Heterostructured transition metal-based nanocomposites
  3. Heterostructure noble metal-based nanocomposites.

Dr. Xu Yu
Dr. Yingbo Kang
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Molecules is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 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 storage
  • energy conversion
  • heterostructure
  • interfacial design
  • defect construction

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Published Papers (3 papers)

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Research

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14 pages, 19958 KiB  
Article
Synergistic Engineering of CoO/MnO Heterostructures Integrated with Nitrogen-Doped Carbon Nanofibers for Lithium-Ion Batteries
by Donglei Guo, Yaya Xu, Jiaqi Xu, Kailong Guo, Naiteng Wu, Ang Cao, Guilong Liu and Xianming Liu
Molecules 2024, 29(10), 2228; https://doi.org/10.3390/molecules29102228 - 9 May 2024
Cited by 1 | Viewed by 944
Abstract
The integration of heterostructures within electrode materials is pivotal for enhancing electron and Li-ion diffusion kinetics. In this study, we synthesized CoO/MnO heterostructures to enhance the electrochemical performance of MnO using a straightforward electrostatic spinning technique followed by a meticulously controlled carbonization process, [...] Read more.
The integration of heterostructures within electrode materials is pivotal for enhancing electron and Li-ion diffusion kinetics. In this study, we synthesized CoO/MnO heterostructures to enhance the electrochemical performance of MnO using a straightforward electrostatic spinning technique followed by a meticulously controlled carbonization process, which results in embedding heterostructured CoO/MnO nanoparticles within porous nitrogen-doped carbon nanofibers (CoO/MnO/NC). As confirmed by density functional theory calculations and experimental results, CoO/MnO heterostructures play a significant role in promoting Li+ ion and charge transfer, improving electronic conductivity, and reducing the adsorption energy. The accelerated electron and Li-ion diffusion kinetics, coupled with the porous nitrogen-doped carbon nanofiber structure, contribute to the exceptional electrochemical performance of the CoO/MnO/NC electrode. Specifically, the as-prepared CoO/MnO/NC exhibits a high reversible specific capacity of 936 mA h g−1 at 0.1 A g−1 after 200 cycles and an excellent high-rate capacity of 560 mA h g−1 at 5 A g−1, positioning it as a competitive anode material for lithium-ion batteries. This study underscores the critical role of electronic and Li-ion regulation facilitated by heterostructures, offering a promising pathway for designing transition metal oxide-based anode materials with high performances for lithium-ion batteries. Full article
(This article belongs to the Special Issue Advanced Heterostructural Nanocomposites for Renewable Energy System)
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11 pages, 2499 KiB  
Article
Hierarchically Structured Graphene Aerogel Supported Nickel–Cobalt Oxide Nanowires as an Efficient Electrocatalyst for Oxygen Evolution Reaction
by Donglei Guo, Jiaqi Xu, Guilong Liu and Xu Yu
Molecules 2024, 29(8), 1805; https://doi.org/10.3390/molecules29081805 - 16 Apr 2024
Viewed by 1022
Abstract
The rational design of a heterostructure electrocatalyst is an attractive strategy to produce hydrogen energy by electrochemical water splitting. Herein, we have constructed hierarchically structured architectures by immobilizing nickel–cobalt oxide nanowires on/beneath the surface of reduced graphene aerogels (NiCoO2/rGAs) through solvent–thermal [...] Read more.
The rational design of a heterostructure electrocatalyst is an attractive strategy to produce hydrogen energy by electrochemical water splitting. Herein, we have constructed hierarchically structured architectures by immobilizing nickel–cobalt oxide nanowires on/beneath the surface of reduced graphene aerogels (NiCoO2/rGAs) through solvent–thermal and activation treatments. The morphological structure of NiCoO2/rGAs was characterized by microscopic analysis, and the porous structure not only accelerates the electrolyte ion diffusion but also prevents the agglomeration of NiCoO2 nanowires, which is favorable to expose the large surface area and active sites. As further confirmed by the spectroscopic analysis, the tuned surface chemical state can boost the catalytic active sites to show the improved oxygen evolution reaction performance in alkaline electrolytes. Due to the synergistic effect of morphology and composition effect, NiCoO2/rGAs show the overpotential of 258 mV at the current density of 10 mA cm−2. Meanwhile, the small values of the Tafel slope and charge transfer resistance imply that NiCoO2/rGAs own fast kinetic behavior during the OER test. The overlap of CV curves at the initial and 1001st cycles and almost no change in current density after the chronoamperometric (CA) test for 10 h confirm that NiCoO2/rGAs own exceptional catalytic stability in a 1 M KOH electrolyte. This work provides a promising way to fabricate the hierarchically structured nanomaterials as efficient electrocatalysts for hydrogen production. Full article
(This article belongs to the Special Issue Advanced Heterostructural Nanocomposites for Renewable Energy System)
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Review

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27 pages, 5389 KiB  
Review
Plasmonics Meets Perovskite Photovoltaics: Innovations and Challenges in Boosting Efficiency
by Chen Wang, Xiaodan Wang, Bin Luo, Xiaohao Shi and Xiangqian Shen
Molecules 2024, 29(21), 5091; https://doi.org/10.3390/molecules29215091 - 28 Oct 2024
Viewed by 1028
Abstract
Perovskite solar cells (PSCs) have garnered immense attention in recent years due to their outstanding optoelectronic properties and cost-effective fabrication methods, establishing them as promising candidates for next-generation photovoltaic technologies. Among the diverse strategies aimed at enhancing the power conversion efficiency (PCE) of [...] Read more.
Perovskite solar cells (PSCs) have garnered immense attention in recent years due to their outstanding optoelectronic properties and cost-effective fabrication methods, establishing them as promising candidates for next-generation photovoltaic technologies. Among the diverse strategies aimed at enhancing the power conversion efficiency (PCE) of PSCs, the incorporation of plasmonic nanoparticles has emerged as a pioneering approach. This review summarizes the latest research advancements in the utilization of plasmonic nanoparticles to enhance the performance of PSCs. We delve into the fundamental principles of plasmonic resonance and its interaction with perovskite materials, highlighting how localized surface plasmons can effectively broaden light absorption, facilitate hot-electron transfer (HET), and optimize charge separation dynamics. Recent strategies, including the design of tailored metal nanoparticles (MNPs), gratings, and hybrid plasmonic–photonic architectures, are critically evaluated for their efficacy in enhancing light trapping, increasing photocurrent, and mitigating charge recombination. Additionally, this review addresses the challenges associated with the integration of plasmonic elements into PSCs, including issues of scalability, compatibility, and cost-effectiveness. Finally, the review provides insights into future research directions aimed at advancing the field, thereby paving the way for next-generation, high-performance perovskite-based photovoltaic technologies. Full article
(This article belongs to the Special Issue Advanced Heterostructural Nanocomposites for Renewable Energy System)
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