Special Issue Editor
* Correspondence: firstname.lastname@example.org
School of Environmental and Material Engineering, Yantai University, No. 30 Qingquan Road, Shandong, 264005, China
Interests: Hydrogen generation and storage materials: Developing high performance hydrogen generation and storage materials, studying the mechanism of reaction of hydrogen and materials; Supercapacitors: Focusing on carbon-based materials derived from various biomass carbonization methods, as well as carbon-containing electrode materials such as metal sulfide, oxides, etc. Microwave absorption materials: Constructing effective microwave absorbers with light weight, strong absorption, thin thickness, and broad frequency characteristics to weaken the negative influences of electromagnetic radiation (Especially magnetic metals and their oxides).
Special Issue Information
Aim and Scope: With rapid consumption of traditional fossil energy and increasingly environmental pollution all over the world, developing effective energy storage, conversion and application materials is a hot research area nowadays. In the past decades, new energy technologies, such as hydrogen production, fuel cells and supercapacitors provide alternative way for future energy supply and utilization. To promote the commercialization process of the alternative energies, this special issue collects papers of clean energy storage and conversion devices, and provides researchers with an in-depth understanding of recent difficulties and progress in production, storage and application of clean energy.
Subtopics: Hydrogen generation, storage and applications; Supercapacitors including electrode material and electrode-electrolyte; Advanced fuel cells; Lithium ion, Sodium ion and metal air battery technology;
Keywords: Hydrogen generation and storage; Supercapacitors; Fuel cells; Renewable energy; Lithium ion battery technology; Energy conversion devices.
Deadline for manuscript submissions: 31 December 2020
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(1) A Programmable Proton Exchange Membrane Fuel Cell Emulator Based on a DC-DC Synchronous Buck Converter
1 Department of Electrical Engineering, CEECS, National United University, Miaoli 36063, Taiwan
2 Institute of Nuclear Energy Research (INER), Atomic Energy Council, 1000 Wenhua Rd. Jiaan Village, Longtan District, Taoyuan City 32546, Taiwan
(2) Oxygen Vacancies Enhanced Pseudocapacitive Charge Storage Performance of WO3-x Crystals
1 School of Science, China University of Geosciences, Beijing 100083, P.R. China
2 School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, P.R. China
3 Liaocheng Product Quality Supervision & Inspection, Liaocheng 252000, Shangdong Province, P.R. China
(1) Experimental study on the performance improvement for AO-LTPEMFC with different design parameters of gas diffusion layer
Chen Zhao *, Shuang Xing, Wei Liu, Ming Chen, Jing Jiang, Haijiang Wang
* Chen Zhao (Corresponding Author)., Southern University of science and technology, Shenzhen 518055, China. E-mail:firstname.lastname@example.org tel.:+86-10-18911566376
Shuang Xing, Southern University of Science and Technology, Shenzhen 518055, China
Wei Liu, Southern University of Science and Technology, Shenzhen 518055, China
Ming Chen, Southern University of Science and Technology, Shenzhen 518055, China
Jing Jiang, Southern University of Science and Technology, Shenzhen 518055, China
Haijiang Wang, Southern University of Science and Technology, Shenzhen 518055, China
Air-cooled open-cathode LTPEMFC (AO-LTPEMFC) have been developed as a new power source for UAV. However, the AO-LTPEMFC appears the lower cell performance than the liquid cooled fuel cell due to poor operating conditions and unsuitable gas diffusion layer (GDL). The single fuel cell was assembled to investigate the effect of the substrate layer and micro porous layer (MPL) with different polytetrafluoroethylene (PTFE) content, the thickness of GDL and the pulse width modulation (PWM) of the fan, as well as the cathode outlet surface temperature distribution on the single cell performance. The results showed that the performance of the cell with the GDL of appropriate PTFE content in the substrate layer and MPL could be optimized significantly. Furthermore, the reasons for the performance improvement were verified by the electrochemical impedance spectroscopy (EIS) and the dynamic voltage test. In addition, the thickness of the GDL also has a certain impact on the mass and heat transfer of the fuel cell, while the water management in GDL will be affected by PWM of fan, simultaneously. Combined with practice process, the optimum values of the substrate layer PTFE content, MPL layer PTFE content and thickness of GDL were identified to be 10%, 40% and 200um, respectively.
Keywords: Gas diffusion layer (GDL), MPL, Substrate layer, PTFE content, Thickness, Air-cooled open cathode LT- PEMFC
(2) Lithium ion battery separators based on electrospun PVDF and copolymers of PVDF
Bicy K, Amadou Balal Gueye, Sabu Thomas
Poor electrochemical performances of commercial lithium ion battery separator limits its use in electric vehicles and energy storage systems. The poor electrochemical performance arises from the low porosity, high thermal shrinkage and poor thermal stability of Poly olefin based separators. This issue can be resolved by the use of novel electrospinning technology, which helps to design new separator materials with high porosity, surface area, electrolyte uptake and ionic conductivity. Among the various polymeric separators, polyvinylidene fluoride (PVDF) and its copolymers are extensively used as lithium ion battery separators due to its attractive properties like good mechanical strength, thermal stability, non-reactive nature, easy processability, etc. In this review we highlight the recent developments and main characteristics of electrospun separators of PVDF based polymers. This review also explored the electrochemical properties of single polymer, polymer blends and nanocomposites of PVDF based polymers in detail.