Enabling fast charging of lithium-ion batteries through secondary- /dual- pore network: Part I - Analytical diffusion model
| Autor: | Eongyu Yi, Kandler Smith, Weijie Mai, Andrew M. Colclasure, Marca M. Doeff, Francois Usseglio-Viretta |
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| Rok vydání: | 2020 |
| Předmět: |
Battery (electricity)
Work (thermodynamics) Materials science Energy General Chemical Engineering chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Tortuosity 0104 chemical sciences Engineering chemistry Electrode Physical Sciences Chemical Sciences Electrochemistry Gravimetric analysis Lithium Diffusion (business) Composite material 0210 nano-technology Porosity |
| Popis: | Battery performance is strongly correlated with electrode microstructural properties. Enabling fast charging of lithium-ion batteries requires improved through-plane ionic diffusion that can be achieved through, among other strategies, structured electrodes with a secondary- or dual-pore network (SPN). In this work, an analytical model investigates the impact of such an SPN on ionic diffusion with a composite electrode, considering various pore-channel geometries and comparing to standard electrodes with identical gravimetric- and volumetric-specific theoretical capacities. Relevant SPN design parameters and tortuosity coefficients are identified according to three optimization objectives that aim to balance the improved overall through-plane diffusion, thanks to the coarse aligned channels, and degraded in-plane diffusion because of the porous matrix densification required to maintain gravimetric- and volumetric-specific theoretical capacities. The model indicates that a relatively low amount of SPN is required and that electrodes with high through-plane tortuosity and low in-plane tortuosity benefit most from such architecture. |
| Databáze: | OpenAIRE |
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