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

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

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.

• Language: English
• Keywords: batteries, Li-Ion, porous electrode models, electrodes topology, NCM, LFP, memory effect
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2020
• Number of pages: 18 str.
• Numbering: Vol. 167, no. 6, art. 060531
• PID: 20.500.12556/RUL-125942
• UDC: 621.352(045)
• ISSN on article: 1945-7111
• DOI: 10.1149/1945-7111/ab84fb
• COBISS.SI-ID: 17157915
• Publication date in RUL: 09.04.2021

Record is a part of a journal

• Title: Journal of the electrochemical society
• Publisher: Electrochemical Society
• ISSN: 1945-7111
• COBISS.SI-ID: 22698791

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
• Licensing start date: 14.04.2020

Secondary language

• Language: Slovenian
• Keywords: baterije, Li-ion, porozne elektrode, topologija elektrod, NCM, LFP, spominski pojavi