Abstract
The porous compacts of non-spherical particles are frequently used in energy storage devices and other advanced applications. In the present work, the microstructures of compacts of monodisperse cylindrical particles are investigated. The cylindrical particles with various aspect ratios are generated using superquadrics, and the discrete element method was adopted to simulate the compacts formed under gravity deposition of randomly oriented particles. The Voronoi tessellation is then used to quantify the porous microstructure of compacts. With one exception, the median reduced free volume of Voronoi cells increases, and the median local packing density decreases for compacts composed of cylinders with a high aspect ratio, indicating a loose packing of long cylinders due to their mechanical interlocking during compaction. The obtained data are needed for further optimization of compact porous microstructure to improve the transport properties of compacts of non-spherical particles.
Highlights
Porous Structure of CylindricalEnergy storage technologies have been widely used in the energy supply chain, and further development of these technologies can significantly promote innovations in the energy sector
Fuel pellets from biomass are used as a source of the primary energy as they can be burned to provide the energy when needed [2], and particle-packed beds as a part of the solar thermal systems are used to store the thermal energy in the secondary energy storage processes [3,4]
There is a need for further analysis of the porous microstructure of non-spherical particle compacts in order to optimize their functional properties for potential applications in energy storage devices
Summary
Porous Structure of CylindricalEnergy storage technologies have been widely used in the energy supply chain, and further development of these technologies can significantly promote innovations in the energy sector. Rising demands for electric vehicles and the widespread application of portable electronics facilitate the development of efficient and environmentally friendly energy storage devices [7,8]. Electrodes in such devices are mainly produced in the form of porous compacts of spherical or, more often, non-spherical particles by tape-casting technology [9]. There is a need for further analysis of the porous microstructure of non-spherical particle compacts in order to optimize their functional properties for potential applications in energy storage devices
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