20.500.12556/RUL-148258 Entering voltage hysteresis in phase-separating materials revealing the electrochemical signature of the intraparticle phase-separated state Hysteresis is a general phenomenon regularly observed in various materials. Usually, hysteretic behavior is an intrinsic property that cannot be circumvented in the non-equilibrium operation of the system. Herein, we show that, at least with regard to the hysteretic behavior of phase-separating battery materials, it is possible to enter (deeply) the hysteretic loop at finite battery currents. This newly observed electric response of the electrode, which is inherent to phase-separating materials, is, for the first time, related to its microscopic origin arising from a (significant) share of the active material residing in an intraparticle phase-separated state. This intriguing observation was further generalized by revealing that a phase-separating material can feature (significantly) different chemical potentials at the same bulk lithiation level and temperature when exposed to the same finite current and external voltage hysteresis. Therefore, the intraparticle phase-separated state significantly affected the DC and AC characteristics of the battery. The experimental evidence for entering the intraparticle phase-separated state is supported by thermodynamic reasoning and advanced modeling. The current findings will help advance the understanding, control, diagnostics, and monitoring of batteries composed of phase-separating materials while also providing pertinent motivation for the enhancement of battery design and performance. batteries phase-separating materials lithium iron phosphate voltage hysteresis intraparticle phase-separation Li-ionska baterija materiali s fazno separacijo napetostna histereza fazno separirano stanje true false true Angleški jezik Slovenski jezik Članek v reviji 2023-08-08 08:25:56 2023-08-08 08:26:09 2023-08-09 03:33:55 0000-00-00 00:00:00 2023 0 0 18 str. iss. 31, art. 2210937 Vol. 35 2023 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.352 1521-4095 10.1002/adma.202210937 151199235 Advanced_Materials_-_2023_-_Katra_nik.pdf Advanced_Materials_-_2023_-_Katra_nik.pdf 1 4010D95EA22F6017E1CDEBA19887D808 5934f9054c72ea4d9d134a68e46cb631d7355a67fb66017ce4ad3553d76798a6 d95a0866-35b4-11ee-aeaf-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=172322 https://onlinelibrary.wiley.com/doi/10.1002/adma.202210937 1 71603c8d-35b4-11ee-aeaf-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=172321 Fakulteta za strojništvo Fakulteta za kemijo in kemijsko tehnologijo 0 0 0