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Effect of Microstructure on Thermal Conduction within Lithium‐Ion Battery Electrodes using Discrete Element Method Simulations
Author(s) -
Sangrós Clara,
Schilde Carsten,
Kwade Arno
Publication year - 2016
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201600144
Subject(s) - materials science , electrode , battery (electricity) , lithium (medication) , thermal conduction , lithium ion battery , microstructure , particle (ecology) , porosity , composite material , ion , thermal , discrete element method , heat transfer , mechanics , thermodynamics , chemistry , medicine , power (physics) , physics , oceanography , organic chemistry , geology , endocrinology
Heat transfer within lithium‐ion‐battery electrodes constitutes an important issue regarding not only battery performance but also safety aspects. The objective of this study is to gain insight into the thermal behavior of particles forming lithium‐ion electrodes to understand the effect of microstructural parameters on heat conduction and, ultimately, improve electrode design. To this end, a discrete element method (DEM) approach is proposed in which a contact model is included. Thus, individual particles are modelled within the electrode and their temperature values are tracked just after the copper substrate, on which the particles are coated, is heated from 273 to 350 K. Furthermore, by adjusting numerous simulations with different structural parameters, namely porosity, particle size, and electrode thickness, the effect of these parameters on the heating rate is investigated.