The Operation of HT-PEM Fuel Cells Coupled to Lithium Ion Batteries in a Fleet of Light Passenger Vehicles

Fuel Cells ◽  
2014 ◽  
Vol 14 (6) ◽  
pp. 945-953 ◽  
Author(s):  
W. J. Hall
Keyword(s):  
Fuel Cells ◽  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Pem Fuel Cells ◽  
Passenger Vehicles

scholarly journals Advances in the Applications of Graphene-Based Nanocomposites in Clean Energy Materials

Crystals ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 47
Author(s):  
Yiqiu Xiang ◽  
Ling Xin ◽  
Jiwei Hu ◽  
Caifang Li ◽  
Jimei Qi ◽  
...  
Keyword(s):  
Solar Cells ◽  
Fuel Cells ◽  
Lithium Ion Batteries ◽  
Electrode Materials ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Clean Energy ◽  
Proton Exchange ◽  
Energy Storage And Conversion ◽  
Thermoelectric Conversion

Extensive use of fossil fuels can lead to energy depletion and serious environmental pollution. Therefore, it is necessary to solve these problems by developing clean energy. Graphene materials own the advantages of high electrocatalytic activity, high conductivity, excellent mechanical strength, strong flexibility, large specific surface area and light weight, thus giving the potential to store electric charge, ions or hydrogen. Graphene-based nanocomposites have become new research hotspots in the field of energy storage and conversion, such as in fuel cells, lithium-ion batteries, solar cells and thermoelectric conversion. Graphene as a catalyst carrier of hydrogen fuel cells has been further modified to obtain higher and more uniform metal dispersion, hence improving the electrocatalyst activity. Moreover, it can complement the network of electroactive materials to buffer the change of electrode volume and prevent the breakage and aggregation of electrode materials, and graphene oxide is also used as a cheap and sustainable proton exchange membrane. In lithium-ion batteries, substituting heteroatoms for carbon atoms in graphene composite electrodes can produce defects on the graphitized surface which have a good reversible specific capacity and increased energy and power densities. In solar cells, the performance of the interface and junction is enhanced by using a few layers of graphene-based composites and more electron-hole pairs are collected; therefore, the conversion efficiency is increased. Graphene has a high Seebeck coefficient, and therefore, it is a potential thermoelectric material. In this paper, we review the latest progress in the synthesis, characterization, evaluation and properties of graphene-based composites and their practical applications in fuel cells, lithium-ion batteries, solar cells and thermoelectric conversion.

Channel Dimension Constraints for Miniature Low Humidity PEM Fuel Cells

2012 ◽  
Author(s):  
Denise A. McKahn ◽  
Xizhu Zhao
Keyword(s):  
Flow Field ◽  
Lithium Ion Batteries ◽  
Mass Density ◽  
Lithium Ion ◽  
Pem Fuel Cells ◽  
Ambient Conditions ◽  
Channel Depth ◽  
Low Humidity ◽  
Minimal Mass ◽  
Channel Dimension

Numerous applications exist requiring power for small loads (<5W) with minimal mass operating in extreme ambient conditions. Making progress toward reducing stack mass, we investigate the influence of flow field channel depth and endplate compression on cell performance. The best performance was found at endplate compressions of 139 psi, cathode channel depths of 0.032 in and anode channel depths of 0.032 in. The maximum power mass-density achieved with these 4.84 cm2 cells was 16.8 mW/g in a single cell stack. If deployed in a multicell stack, this same performance would translate to a power mass-density of 45.3 mW/g, nearing the performance of off-the-shelf lithium ion batteries (approximately 70 mW/g).

Highly nitrogen-doped carbon capsules: scalable preparation and high-performance applications in fuel cells and lithium ion batteries

Nanoscale ◽  
2013 ◽  
Vol 5 (7) ◽  
pp. 2726 ◽  
Author(s):  
Chuangang Hu ◽  
Ying Xiao ◽  
Yang Zhao ◽  
Nan Chen ◽  
Zhipan Zhang ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Lithium Ion Batteries ◽  
High Performance ◽  
Lithium Ion ◽  
Nitrogen Doped ◽  
Nitrogen Doped Carbon

scholarly journals Nanomaterials for lithium-ion batteries and hydrogen energy

2017 ◽  
Vol 89 (8) ◽  
pp. 1185-1194 ◽  
Author(s):  
Irina A. Stenina ◽  
Andrey B. Yaroslavtsev
Keyword(s):  
Fuel Cells ◽  
Lithium Ion Batteries ◽  
Alternative Energy ◽  
Electrode Materials ◽  
Lithium Iron Phosphate ◽  
Electronic Conductivity ◽  
Lithium Ion ◽  
Iron Phosphate ◽  
Inorganic Nanoparticles ◽  
Hydrogen Energy

Abstract Development of alternative energy sources is one of the main trends of modern energy technology. Lithium-ion batteries and fuel cells are the most important among them. The increase in the energy and power density is the essential aspect which determined their future development. We provide a brief review of the state of developments in the field of nanosize electrode materials and electrolytes for lithium-ion batteries and hydrogen energy. The presence of relatively inexpensive and abundant elements, safety and low volume change during the lithium intercalation/deintercalation processes enables the application of lithium iron phosphate and lithium titanate as electrode materials for lithium-ion batteries. At the same time, they exhibit low ionic and electronic conductivity. To overcome this problem the following main approaches have been applied: use of nanosize materials, including nanocomposites, and heterovalent doping. Their impact in the property change is analyzed and discussed. Hybrid membranes containing inorganic nanoparticles enable a significant progress in the fuel cell development. Different approaches to their preparation, the reasons for ion conductivity and selectivity change, as well as the prospects for their application in low-temperature fuel cells are discussed. This review may provide some useful guidelines for development of advanced materials for lithium ion batteries and fuel cells.

Applications and Expectations of Fuel Cells and Lithium Ion Batteries

2021 ◽  
pp. 91-106
Author(s):  
Feyza Zengin ◽  
Emin Okumuş ◽  
M. Nurullah Ateş ◽  
Bahadır Tunaboylu
Keyword(s):  
Fuel Cells ◽  
Lithium Ion Batteries ◽  
Lithium Ion
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