Year: 2018
Type: conference-paper
Abstract: Commercialized lithium-ion batteries stand out among energy storage devices because they offer good energy and high power densities.On negative electrodes of lithium-ion batteries, a thin layer of electrolyte reduction products forms.Even though this solidelectrolyte interphase (SEI) suppresses the further electrolyte reduction, continued SEI growth is the main contributor to lithium-ion loss, capacity fade, and limited battery lifetime [1] .Key questions about SEI chemistry and mechanisms are still unanswered.The experimentally observed square-root-of-time dependence of capacity fade suggests a transport limitation, but it does not distinguish between different transport mechanisms.We develop a series of models to predict additional dependencies, i.e., morphology of SEI and potential dependence of SEI growth [2][3][4] .Dedicated experiments can then identify the long-term growth mechanisms, e.g., battery storage at various state-of-charge [1] , neutron reflectometry [5] , and SEI on model electrodes [6] .
Source: elib (German Aerospace Center)
Authors: Birger Horstmann, Fabian Single, Arnulf Latz
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2996590138