Enhanced porous electrode theory based electrochemical model for higher fidelity modelling and deciphering of the EIS spectra

Mele, Igor (avtor), Zelič, Klemen (avtor), Firm, Marko (avtor), Moškon, Jože (avtor), Gaberšček, Miran (avtor), Katrašnik, Tomaž (avtor)

Electrochemical impedance spectroscopy (EIS) is essential for non-invasive battery characterization. This paper addresses the challenge of adequate interpretation of EIS spectra, which are often complicated by overlapping internal phenomena occurring on similar time scales. We present, for the first time, a high-fidelity numerical time-domain electrochemical model that can virtually replicate experimental EIS spectra with three superimposed high-frequency semicircles, a transition to the diffusion tail at elevated imaginary values, and a tilted diffusion tail at low frequencies. These advanced features were made possible by extending state-of-the-art porous electrode model with innovative sub-models for the double layer phenomenon at the carbon black/electrolyte and metal Li-anode/electrolyte interfaces, and transport phenomena of charged species through the solid electrolyte interphase at the Li-anode interface. Additionally, we modelled the diffusion tail inclination by introducing representative active particles of varying sizes. Results from custom-made half-cells confirm the model's ability to decipher EIS spectra more accurately compared to existing models. Moreover, innovative physics-based battery model that is capable of accurately modelling intra-cell phenomena can reveal internal states and physical parameters of batteries using measured EIS spectra. The model, therefore, also enables functionality of an advanced virtual sensor, which is an important diagnostics feature in next-generation battery management systems.

• Jezik: Angleški jezik
• Ključne besede: Li-ion battery modelling, electrochemical model, electrochemical impedance spectroscopy, NMC, deciphering EIS spectra
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FS - Fakulteta za strojništvo ; FKKT - Fakulteta za kemijo in kemijsko tehnologijo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2024
• Št. strani: 17 str.
• Številčenje: Vol. 171, no. 8, art. 080537
• PID: 20.500.12556/RUL-160434
• UDK: 621.35
• ISSN pri članku: 1945-7111
• DOI: 10.1149/1945-7111/ad6eb9
• COBISS.SI-ID: 205603331
• Datum objave v RUL: 28.08.2024

Gradivo je del revije

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

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: Li-ionske baterije, elektrokemijski model, elektrokemijska impedančna spektroskopija, NMC, interpretirati EIS spekter