Advanced porous electrode modelling framework based on more consistent virtual representation of the electrode topology

Igor Mele (Author), Ivo Pačnik (Author), Klemen Zelič (Author), Jože Moškon (Author), Tomaž Katrašnik (Author)

Abstract

The paper proposes an advanced continuum level modelling framework characterized by a more consistent virtual representation of electrode topology to enhance prediction capability and generality of porous electrode theory based models. The proposed modelling framework, therefore, establishes the missing link between the mesoscopic scale with a detailed 3D representation of electrode topology and the continuum single cell scale, where interrelation to the real electrode topology was missing. This link is established by elaborating a unified approach for modelling materials with significantly different topologies of active material by virtually creating agglomerates, representing secondary particles, from primary particles. Proposed approach relies on multi-particle size distribution of primary particles and particle-to-particle connectivity. Generality of the proposed modelling framework is demonstrated by simulating LFP and NMC materials featuring significantly different electrode topologies by the same modelling framework while adapting only virtual representation of electrode topologies and intrinsic material properties. Credibility of the proposed modelling framework is confirmed through good agreement with experimental results for various discharge tests. Insightful simulation results also reveal background of the topologically driven low Li utilization at high current densities of the LFP material and topologically driven voltage response difference during the memory effect of different LFP materials.

Keywords

batteries;Li-Ion;porous electrode models;electrodes topology;NCM;LFP;memory effect;

Data

Language:	English
Year of publishing:	2020
Typology:	1.01 - Original Scientific Article
Organization:	UL FS - Faculty of Mechanical Engineering
UDC:	621.352(045)
COBISS:	17157915
ISSN:	1945-7111
Views:	367
Downloads:	158
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	Slovenian
Secondary keywords:	baterije;Li-ion;porozne elektrode;topologija elektrod;NCM;LFP;spominski pojavi;
Type (COBISS):	Article
Pages:	str. [1-18]
Volume:	ǂVol. ǂ167
Issue:	ǂno. ǂ6
Chronology:	2020
DOI:	10.1149/1945-7111/ab84fb
ID:	12795275