NDLI: Performance Impacts of Tailored Surface Geometry in Li-Ion Battery Cathodes

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	George, J. Nelson
Copyright Year	2013
Abstract	Analytical models developed to investigate charge transfer in Li-ion battery cathodes reveal distinct transport regimes where performance may be limited by either microstructural surface characteristics or solid phase geometry. For several cathode materials, particularly those employing conductive additives, surface characteristics are expected to drive these performance limitations. For such electrodes gains in performance may be achieved by modifying surface geometry to increase surface area. However, added surface area may present a diminishing return if complex structures restrict access to electrochemically active interfaces. A series of parametric studies has been performed to better ascertain the merits of complex, tailored surfaces in Li-ion battery cathodes. The interaction between lithium transport and surface geometry is explored using a finite element model in which complex surfaces are simulated with fractal structures. Analysis of transport in these controlled structures permits assessment of scaling behavior related to surface complexity and provides insight into trade-offs in tailoring particle surface geometry.
File Format	PDF
ISBN	9780791856284
DOI	10.1115/IMECE2013-65230
Volume Number	Volume 6A: Energy
Conference Proceedings	ASME 2013 International Mechanical Engineering Congress and Exposition
Language	English
Publisher Date	2013-11-15
Publisher Place	San Diego, California, USA
Access Restriction	Subscribed
Subject Keyword	Geometry Lithium-ion batteries Electrodes Finite element model Particulate matter Tradeoffs Lithium Fractals Charge transfer
Content Type	Text
Resource Type	Article

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