Phase separating electrode materials - chemical inductors?

Zelič, Klemen (author), Mele, Igor (author), Bhowmik, Arghya (author), Katrašnik, Tomaž (author)

We unreveal mechanistic background of the presence of chemical inductive effects in phase separating ion intercalation energy storage materials, in particular lithium iron phosphate (LFP) and lithium titanate oxide (LTO), by applying a detailed phase field model. These materials feature fast (de)intercalation and slow diffusion relaxation phenomena, which are prerequisites for observing such inductive effects. The results are based on the mechanistic model and analytical considerations, which show that all equilibrium states that lie within the miscibility gap of the phase-separating material exhibit a strong inductive response in the low frequency part of the spectrum. We also explain why such inductive effects are not observed outside the miscibility gap. In this letter, we present the first mechanistic justification for the previously reported experimental observation of electrode level inductance in impedance measurements at low currents.

• Language: English
• Keywords: li-ion batteries, electrode materials, aktive particle, quazi 3D model, porous electrode model
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2023
• Number of pages: Str. 489-494
• Numbering: Vol. 56
• PID: 20.500.12556/RUL-144241
• UDC: 621.313/.314
• ISSN on article: 2405-8297
• DOI: 10.1016/j.ensm.2023.01.008
• COBISS.SI-ID: 140743427
• Publication date in RUL: 06.02.2023

Record is a part of a journal

• Title: Energy storage materials
• Publisher: Elsevier
• ISSN: 2405-8297
• COBISS.SI-ID: 6688026

Licences

• License: CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
• Link: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Description: The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.

Secondary language

• Language: Slovenian
• Keywords: litij ionske baterije, elektrodni materiali, aktivni delci, kvazi 3D model, model porozne elektrode

Projects

• Funder: EC - European Commission
• Funding programme: H2020
• Project number: 957189
• Name: Battery Interface Genome - Materials Acceleration Platform
• Acronym: BIG-MAP

• Funder: ARRS - Slovenian Research Agency
• Project number: P2-0401
• Name: Energetsko strojništvo