Faster charging at normal temperature may lead to a plating side reaction during the end of charging at the anode-separator interface.
Post-mortem examinations indicate that the characteristic change in the local slope of the curve is related to the change occurring at the local interfaces, including three phenomena - formation of tight adhesion on the anode-separator interfaces, delamination in the separators and decoating of graphite particles from the anodes.
Subsequently, galvanostatic measurements and electrochemical impedance spectra (EIS) are performed on Li symmetric cells to investigate the effect of separator wettability on interface properties.
First, we integrated a nanoporous tracketch separator at the interface of the fuel and electrolyte streams in a single-channel LFFC to dramatically reduce the cross-sectional area across which methanol can diffuse.
Horizontal separators have greater interface areas, which enhances phase equilibrium.
This behavior was due to the 3CA decomposition and the formation of conducting polymer film within separator and at cathode/electrolyte interface, which consumes the surplus current and inhibit the voltage increase through the shunting effect.
In this work, a detailed study is carried out to clearly explore the influence of separator wettability on ionic conduction and interface properties for lithium-metal anode batteries.
Asymmetric separators with polysulfide barrier properties, consisting of porous polypropylene (PP) grafted with styrene sulfonate (SS), PP-g-PLiSS, were characterized in symmetric Li/Li cells using electrochemical impedance spectroscopy to investigate the influence of separator chemistry on the Li electrode/electrolyte interface.
The BN-separator offers a uniform thermal distribution interface, which enables homogeneous Li nucleation, enhanced suppression of Li dendrite growth, and further improves the overall electrochemical performance.
A coating layer consisting of a layer of graphene oxide (GO) inserted in between two layers of multi-walled carbon nanotubes (MWCNT) forms a multifunctional polysulfide-trapping triple-interface on the polymeric separator for lithium sulfur (Li S) batteries.
