Klemen Zelič (Avtor), Igor Mele (Avtor), Ivo Pačnik (Avtor), Jože Moškon (Avtor), Miran Gaberšček (Avtor), Tomaž Katrašnik (Avtor)

Povzetek

Phase separating Li-ion battery cell cathode materials feature a well-known phenomenon called the memory effect. It manifests itself as an abnormal change in working voltage being dependent on cell cycling history. It was only recently that plausible mechanistic reasoning of the memory effect in Li-ion batteries was proposed. However, the existing literature does still not consistently reveal a phenomenological background for the onset or absence of the memory effect. This paper provides strong experimental and theoretical evidence of the memory effect in phase separating Li-ion battery cathode materials. Specifically, the background leading to the onset or absence of the memory effect and the underlying causal chain of phenomena from the collective particle-by-particle intra-electrode phenomena to macroscopic voltage output of the battery are presented and discussed. The results, clearly reveal that no memory effect is observed and predicted for low cut off voltages, whereas the absence of the first rest in memory writing cycle does not result in the absence of the memory effect, as previously believed. In addition, excellent agreement between the simulated and measured results is shown which, on one hand confirms the credibility of the combined analyses and, on the other, provides clear causal relations from macroscopic experimental parameters to simulated phenomena on the particle level.

Ključne besede

Li-ion battery;phase separating material;multi-particle porous electrode;memory effect;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UL FS - Fakulteta za strojništvo
UDK: 621.352(045)
COBISS: 16934939 Povezava se bo odprla v novem oknu
ISSN: 0039-2480
Matična publikacija: Strojniški vestnik
Št. ogledov: 539
Št. prenosov: 377
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Slovenski jezik
Sekundarni naslov: Termodinamsko ozadje spominskega efekta v katodnih materialih s fazno separacijo
Sekundarne ključne besede: litij ionske baterije;spominski efekt;katodni material s fazno separacijo;večdelčna porozna elektroda;
Vrsta dela (COBISS): Članek v reviji
Strani: str. 690-700, SI 88
Letnik: ǂVol. ǂ65
Zvezek: ǂno. ǂ11/12
Čas izdaje: Nov.-Dec. 2019
DOI: 10.5545/sv-jme.2019.6366
ID: 11394023