Phase Separating Electrode Materials – Chemical Inductors?

16 June 2022, Version 1
This content is a preprint and has not undergone peer review at the time of posting.


We discover presence of chemical inductive effects in phase separating ion intercalation energy storage materials, specifically in lithium iron phosphate (LFP) and also lithium titanate oxide (LTO). These materials features fast (de)intercalation and slow diffusion relaxation phenomena which are prerequisites for observing such inductive effects. Presented finding is supported by the mechanistic model and analytical reasoning indicating that all equilibrium states that lay inside the miscibility gap of the phase separating material exhibit strong inductive response in the low frequency part of spectrum. We also explain why such inductive effects are not observed outside the miscibility gap. This letter presents the first mechanistic reasoning of previously reported electrode level experimental observation of inductance during impedance measurements at low currents.


Electrochemical Impedance Spectroscopy (EIS)
Lithium Iron Phosphate (LFP)
Phase Field Modeling
phase separation electrode materials

Supplementary materials

Phase Separating Electrode Materials – Chemical Inductors? SUPPLEMENTARY INFORMATION
Supplementary information of a paper: Phase Separating Electrode Materials – Chemical Inductors? Includes model validation, description of used linearization procedure and results for second tested material (LTO)


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