Phase separating electrode materials - chemical inductors?

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

Abstract

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.

Keywords

litij ionske baterije;elektrodni materiali;aktivni delci;kvazi 3D model;model porozne elektrode;li-ion batteries;electrode materials;aktive particle;quazi 3D model;porous electrode model;

Data

Language:	English
Year of publishing:	2023
Typology:	1.01 - Original Scientific Article
Organization:	UL FS - Faculty of Mechanical Engineering
UDC:	621.313/.314
COBISS:	140743427
ISSN:	2405-8297
Views:	979
Downloads:	342
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	Slovenian
Secondary keywords:	litij ionske baterije;elektrodni materiali;aktivni delci;kvazi 3D model;model porozne elektrode;
Type (COBISS):	Article
Pages:	str. 489-494
Issue:	ǂVol. ǂ56
Chronology:	Feb. 2023
DOI:	10.1016/j.ensm.2023.01.008
ID:	17939114