Phase separating electrode materials - chemical inductors?

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

Povzetek

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.

Ključne besede

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;

Podatki

Jezik:	Angleški jezik
Leto izida:	2023
Tipologija:	1.01 - Izvirni znanstveni članek
Organizacija:	UL FS - Fakulteta za strojništvo
UDK:	621.313/.314
COBISS:	140743427
ISSN:	2405-8297
Št. ogledov:	979
Št. prenosov:	342
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

Sekundarni jezik:	Slovenski jezik
Sekundarne ključne besede:	litij ionske baterije;elektrodni materiali;aktivni delci;kvazi 3D model;model porozne elektrode;
Vrsta dela (COBISS):	Članek v reviji
Strani:	str. 489-494
Zvezek:	ǂVol. ǂ56
Čas izdaje:	Feb. 2023
DOI:	10.1016/j.ensm.2023.01.008
ID:	17939114