Application of Poly(N-vinylformamide) on Separators for Li-ion Batteries

Abstract

The composite separators are made of Poly(N-vinylformamide)(PNVF) and ceramic for Li-ion batteries to be investigated influences on physical properties electrochemical performance and safety EIS analysis shows that impedance of PNVF-coated separator is small than Polypropylene (PP) separator and result in longer cycle life On galvanostatic cycling voltage profiles PNVF strengthens PP separator to slow down dendrite formation On second section the specific capacity of Al2O3 and TiO2 spin coating on Separator is lower than PP separator because Al2O3 reacts with Li Due to contact with a ceramic layer facing Li anode shows better performances than LFP cathode in general On Final section Preparing the composite separators need to be noted factors of pore size and thickness or it happens micro short-circuit And it also doesn’t melt and flame at 150 ?C to lead to prevent batteries from thermal runaway Furthermore dendrite cannot go through composite ceramic separators more than 1400 hours like ceramic-coated separators shown galvanostatic cycling voltage profiles

Date of Award	2019
Original language	English
Supervisor	Sheng-Shu Hou (Supervisor)