How to adequately describe full range intercalation -- a two-sided approach
Abstract
Here we show the description of the full incorporation thermodynamics in nanocrystalline LixFePO4 where the full range from x=0 to 1 is experimentally accessible. The following points are most important: the treatment in terms of the neutral lattice-gas model is incorrect rather ions and electrons need to be considered separately. One needs to invoke point defect chemistry which gives a satisfactory agreement over the full storage range if we treat the problem from the two-sides: from the FePO4 side where Li+ is incorporated interstitially and from the LiFePO4 side where Li+ is filling the vacancies. Furthermore, we clarify how non-idealities such as ion-electron and electron-electron interactions can be introduced to obtain a mechanistic understanding.
Cite
@article{arxiv.2303.18173,
title = {How to adequately describe full range intercalation -- a two-sided approach},
author = {Yue Zhu and Joachim Maier},
journal= {arXiv preprint arXiv:2303.18173},
year = {2023}
}