Effect of polyphenol-polyamine treated polyethylene separator on the ionic conduction and interface properties for lithium-metal anode batteries

摘要: Abstract Lithium metal is a promising anode candidate for the next-generation higher energy density batteries. In this work, detailed study carried out to clearly explore influence of separator wettability on ionic conduction and interface properties lithium-metal Firstly, polyphenol polyamine are facilely assembled surface polyethylene (PE) with assistant periodate. Wettability electrolyte uptake polyphenol-polyamine treated PE improves significantly, which resulted in increase conductivity lithium-ion transference number (from 0.37 0.49). Subsequently, galvanostatic measurements electrochemical impedance spectra (EIS) performed Li symmetric cells investigate effect properties. It found that modified favors process by providing lower interfacial resistance, better compatibility, more uniform deposition Li+, correspondingly mitigate formation dendrites. Finally, (LiCoO2 (LCO)/Li) different separators tested, superior battery performance displayed case substrate. These results expected be instructive design durable electrodes.