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Advances in Thin Films for Energy Storage and Conversion
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Advances in Thin Films for Energy Storage and Conversion

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Surface Engineering for Energy Harvesting, Conversion, and Storage".

Deadline for manuscript submissions: 20 May 2024 | Viewed by 1798

Special Issue Editors

Dr. Gaoqiang Yang

E-Mail Website
Guest Editor
College of Mechanical and Vehicle Engineering, Hunan University, Changsha 410082, China
Interests: energy harvesting/conversion/storage devices (fuel cell, electrolyzer, etc.); nems/mems fabrication; multi-scale fluidics; heat transfer
Dr. Kui Li

E-Mail Website
Guest Editor
MPA-11, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
Interests: electrochemistry; electrocatalysis; fuel cells; water electrolyzer; hydrogen; electrochemical energy conversion reactions
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

To meet the growing demands of energy supply and overcome worldwide energy shortages, thin films for energy storage and conversion technologies and their applications have recently attracted increasing attention, and are of immense importance for the modern energy society, due to their capability of providing specific physical and chemical properties to the surface of bulk materials with the versatility and ease. Material development, characterization, and simulation, as well as performance evaluation of thin films, have been conducted in energy storage and conversion devices, including fuel cells, water electrolyzers, supercapacitors, batteries, and so on.

This Special Issue aims to provide a platform for researchers and scholars to demonstrate and exchange the latest research findings on thin films for energy storage and conversion applications.

In this Special Issue, original research articles and reviews are welcome. Research areas may include (but not limited to) the following:

  • Novel thin films or coatings for electrochemical applications;
  • Fuel cells;
  • Water electrolyzers;
  • Lithium/sodium-ion batteries;
  • Solar energy conversion and storage;
  • Capacitors and supercapacitors;
  • Materials for cathodes, anodes, and electrolytes;
  • Electrochemical characterization;
  • Nano/microstructured materials;
  • Flexible electronics energy storage devices.

We look forward to receiving your contributions.

Dr. Gaoqiang Yang
Dr. Kui Li
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. Coatings is an international peer-reviewed open access monthly 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 2600 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.

Published Papers (2 papers)

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Research

14 pages, 21442 KiB  
Article
Corrosion Resistance and Conductivity of Ta-Nb-N-Coated 316L Stainless Steel as Bipolar Plates for Proton Exchange Membrane Fuel Cells
by Qizhong Li, Chuan Ding, Mai Yang, Meijun Yang, Tenghua Gao, Song Zhang, Baifeng Ji, Takashi Goto and Rong Tu
Coatings 2024, 14(5), 542; https://doi.org/10.3390/coatings14050542 - 26 Apr 2024
Viewed by 244
Abstract
The large-scale application of stainless steel (SS) bipolar plates (BPs) in proton exchange membrane fuel cells (PEMFCs) is mainly limited by insufficient corrosion resistance and electrical conductivity. In this work, Ta-Nb-N coatings were prepared on 316L SS substrates by unbalanced magnetron sputtering to [...] Read more.
The large-scale application of stainless steel (SS) bipolar plates (BPs) in proton exchange membrane fuel cells (PEMFCs) is mainly limited by insufficient corrosion resistance and electrical conductivity. In this work, Ta-Nb-N coatings were prepared on 316L SS substrates by unbalanced magnetron sputtering to improve corrosion resistance and conductivity. The Ta-Nb-N coatings had a dense structure without obvious defects. In simulated PEMFC cathode environments consisting of 0.5 M H2SO4 + 2 ppm HF at 70 ± 0.5 °C, which is harsher than the U.S. Department of Energy specification, the corrosion current density of Ta-Nb-N-coated BPs was reduced to 2.2 × 10−2 μA·cm−2. Ta-Nb-N-coated samples showed better electrical conductivity than 316L SS, which had an excellent interfacial contact resistance of 9.2 mΩ·cm2. In addition, the Ta-Nb-N-coated samples had a water contact angle of 100.7°, showing good hydrophobicity for water management. These results indicate that Ta-Nb-N coatings could be a promising material for BPs. Full article
(This article belongs to the Special Issue Advances in Thin Films for Energy Storage and Conversion)
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13 pages, 6691 KiB  
Article
Flexible Micro-Sensor Packaging and Durability for Real-Time Monitoring of Vanadium Flow Batteries
by Chi-Yuan Lee, Chin-Lung Hsieh, Chia-Hung Chen, Lung-Jieh Yang, Ching-Liang Dai, Chong-An Jiang and Yu-Chun Chen
Coatings 2022, 12(10), 1531; https://doi.org/10.3390/coatings12101531 - 13 Oct 2022
Viewed by 1151
Abstract
The reactions of vanadium redox flow batteries (VRFBs) are quite complex and the internal environment is strongly acidic. The internal voltage, current, temperature and flow distribution play a very important role in the performance of a VRFB. The VRFB, which was developed by [...] Read more.
The reactions of vanadium redox flow batteries (VRFBs) are quite complex and the internal environment is strongly acidic. The internal voltage, current, temperature and flow distribution play a very important role in the performance of a VRFB. The VRFB, which was developed by our R&D team, encountered easy leakage of electrolytes during assembly. Additionally, the strongly acidic environment can easily cause aging or failure of these VRFBs and of the micro-sensor. Therefore, this research was aimed at the need for real-time micro-diagnosis inside the VRFB. The use of micro-electro-mechanical systems (MEMS) technology was proposed so as to develop a flexible, integrated (current, voltage, flow and temperature), micro-sensor, and a durability test was conducted after packaging. Further, we performed real-time monitoring of the VRFBs. The main finding was that the encapsulation contributed to the stability of the micro-sensor without any failure due to excessive flow impacting the sensor. In the end we successfully used a 3D printed package to protect the micro-sensor. Full article
(This article belongs to the Special Issue Advances in Thin Films for Energy Storage and Conversion)
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