20.500.12556/RUL-160434 Enhanced porous electrode theory based electrochemical model for higher fidelity modelling and deciphering of the EIS spectra 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. Li-ion battery modelling electrochemical model electrochemical impedance spectroscopy NMC deciphering EIS spectra Li-ionske baterije elektrokemijski model elektrokemijska impedančna spektroskopija NMC interpretirati EIS spekter true false true Angleški jezik Slovenski jezik Članek v reviji 2024-08-28 13:08:56 2024-08-28 13:09:01 2025-04-01 10:43:51 0000-00-00 00:00:00 2024 0 0 17 str. no. 8, art. 080537 Vol. 171 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.35 1945-7111 10.1149/1945-7111/ad6eb9 205603331 Mele_Enhanced_Porous_Electrode_Theory_Based_Electrochemical_....pdf Mele_Enhanced_Porous_Electrode_Theory_Based_Electrochemical_....pdf 1 BDDC9DDF46925A775556CE0AA07D5964 71ac72d4999bb4b9db06a6e711e928a190e11775d9121ab8a0abbf185b89648c 0f5adffe-652e-11ef-8f74-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=189121 https://iopscience.iop.org/article/10.1149/1945-7111/ad6eb9 1 b50d48f8-652d-11ef-8f74-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=189120 Fakulteta za strojništvo Fakulteta za kemijo in kemijsko tehnologijo 0 0 0