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Molecules
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New Functional Materials for Energy Storage
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New Functional Materials for Energy Storage

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

Deadline for manuscript submissions: closed (30 April 2024) | Viewed by 5570

Special Issue Editors

Dr. Vaiyapuri Soundharrajan

E-Mail Website
Guest Editor
Department of Materials Science and Engineering, Chonnam National University, Gwangju 500-757, Korea
Interests: energy storage; lithium-ion battery; sodium-ion battery; zinc-ion battery; materials chemistry
Prof. Dr. Li Du

E-Mail Website
Guest Editor
Guangdong Provincial Key Laboratory of Fuel Cell Technology, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
Interests: energy materials including electrocatalysts for HER/OER/ORR and novel porous materials for electrochemical applications; electrochemical devices and engineering including water electrolyzer and proton exchange membrane fuel cells; lithium batteries and solid-state electrolytes
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

It is my immense pleasure to invite you to submit to the upcoming Special Issue titled “New Functional Materials for Energy Storage” in Molecules (Impact Factor 4.412).

The successful commercialization of existing energy storage devices including lithium-ion batteries (LIBs), supercapacitors, fuel cells, and solar cells is mainly possible due to the evolution of innovative functional materials. The adoption of sustainable energy storage devices was strongly believed to be a permanent solution in the fight against global carbon emissions. Electrode materials are the chief components of electrochemical energy storage devices, and their function is not only to store the harvested energy; they hold diverse properties. It has to be acknowledged here that the adoption of the unique materials engineering approach with proper surface morphology and personalized properties could impart specific functions to the electrode materials, increasing the versatility and applicability of electrode materials and thus the energy storage devices for the betterment of eco-friendly society. The primary goal of this Special Issue is to summarize the prevailing functional materials strategies and innovations for existing energy storage devices. Research articles, review articles, and communications are invited for this Special Issue.

Dr. Vaiyapuri Soundharrajan
Prof. Dr. Li Du
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

  • lithium-ion batteries (LIBs)
  • supercapacitors
  • fuel cells
  • and solar cells
  • electrode materials
  • functional materials

Published Papers (3 papers)

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Research

10 pages, 2374 KiB  
Article
Realizing Scalable Nano-SiO2-Aerogel-Reinforced Composite Polymer Electrolytes with High Ionic Conductivity via Rheology-Tuning UV Polymerization
by Mianrui Li, Shengguang Qi, Shulian Li and Li Du
Molecules 2023, 28(2), 756; https://doi.org/10.3390/molecules28020756 - 12 Jan 2023
Cited by 2 | Viewed by 1586
Abstract
Polymer electrolytes for lithium metal batteries have aroused widespread interest because of their flexibility and excellent processability. However, the low ambient ionic conductivity and conventional fabrication process hinder their large-scale application. Herein, a novel polyethylene-oxide-based composite polymer electrolyte is designed and fabricated by [...] Read more.
Polymer electrolytes for lithium metal batteries have aroused widespread interest because of their flexibility and excellent processability. However, the low ambient ionic conductivity and conventional fabrication process hinder their large-scale application. Herein, a novel polyethylene-oxide-based composite polymer electrolyte is designed and fabricated by introducing nano-SiO2 aerogel as an inorganic filler. The Lewis acid–base interaction between SiO2 and anions from Li salts facilitates the dissociation of Li+. Moreover, the SiO2 interacts with ether oxygen (EO) groups, which weakens the interaction between Li+ and EO groups. This synergistic effect produces more free Li+ in the electrolyte. Additionally, the facile rheology-tuning UV polymerization method achieves continuous coating and has potential for scalable fabrication. The composite polymer electrolyte exhibits high ambient ionic conductivity (0.68 mS cm−1) and mechanical properties (e.g., the elastic modulus of 150 MPa). Stable lithium plating/stripping for 1400 h in Li//Li symmetrical cells at 0.1 mA cm−2 is achieved. Furthermore, LiFePO4//Li full cells deliver superior discharge capacity (153 mAh g−1 at 0.5 C) and cycling stability (with a retention rate of 92.3% at 0.5 C after 250 cycles) at ambient temperature. This work provides a promising strategy for polymer-based lithium metal batteries. Full article
(This article belongs to the Special Issue New Functional Materials for Energy Storage)
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15 pages, 2702 KiB  
Article
Aqueous Rechargeable Zn/ZnO Battery Based on Deposition/Dissolution Chemistry
by Vaiyapuri Soundharrajan, Jun Lee, Seokhun Kim, Dimas Yunianto Putro, Seulgi Lee, Balaji Sambandam, Vinod Mathew, Kumaresan Sakthiabirami, Jang-Yeon Hwang and Jaekook Kim
Molecules 2022, 27(24), 8664; https://doi.org/10.3390/molecules27248664 - 07 Dec 2022
Cited by 5 | Viewed by 1995
Abstract
Recently, a novel electrochemical regulation associated with a deposition/dissolution reaction on an electrode surface has been proven to show superiority in large-scale energy storage systems (ESSs). Hence, in the search for high-performance electrodes showcasing these novel regulations, we utilized a low-cost ZnO microsphere [...] Read more.
Recently, a novel electrochemical regulation associated with a deposition/dissolution reaction on an electrode surface has been proven to show superiority in large-scale energy storage systems (ESSs). Hence, in the search for high-performance electrodes showcasing these novel regulations, we utilized a low-cost ZnO microsphere electrode to construct aqueous rechargeable batteries (ARBs) that supplied a harvestable and storable charge through electrochemical deposition/dissolution via a reversible manganese oxidation reaction (MOR)/manganese reduction reaction (MRR), respectively, induced by the inherent formation/dissolution of zinc basic sulfate in a mild aqueous electrolyte solution containing 2 M ZnSO4 and 0.2 M MnSO4. Full article
(This article belongs to the Special Issue New Functional Materials for Energy Storage)
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11 pages, 2573 KiB  
Article
Work Efficiency and Economic Efficiency of Actual Driving Test of Proton Exchange Membrane Fuel Cell Forklift
by Zi’ang Xiong, Haikun Zhou, Xuewen Wu, Siew Hwa Chan, Zhiyong Xie and Dai Dang
Molecules 2022, 27(15), 4918; https://doi.org/10.3390/molecules27154918 - 02 Aug 2022
Cited by 4 | Viewed by 1464
Abstract
A 3.5 tonne forklift containing proton exchange membrane fuel cells (PEMFCs) and lithium-ion batteries was manufactured and tested in a real factory. The work efficiency and economic applicability of the PEMFC forklift were compared with that of a lithium-ion battery-powered forklift. The results [...] Read more.
A 3.5 tonne forklift containing proton exchange membrane fuel cells (PEMFCs) and lithium-ion batteries was manufactured and tested in a real factory. The work efficiency and economic applicability of the PEMFC forklift were compared with that of a lithium-ion battery-powered forklift. The results showed that the back-pressure of air was closely related to the power density of the stack, whose stability could be improved by a reasonable control strategy and membrane electrode assemblies (MEAs) with high consistency. The PEMFC powered forklift displayed 40.6% higher work efficiency than the lithium-ion battery-powered forklift. Its lower use-cost compared to internal engine-powered forklifts, is beneficial to the commercialization of this product. Full article
(This article belongs to the Special Issue New Functional Materials for Energy Storage)
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