Ceramic coated polypropylene separators for lithium-ion batteries with improved safety: effects of high melting point organic binder

摘要: Coating commercial polyolefin separators with inorganic materials for lithium-ion batteries is considered as one of the most effective and economic ways to enhance thermal stability which further improves safety batteries. The coating usually involves an organic binder, preferably high melting point (MP) polymer. However, little effort has been devoted understanding detailed effects MP binders on behavior composite well electrochemical performance cells using these separators. In this paper, we present a case study poly(vinyl alcohol) (PVA) binder ceramic (Al2O3) We focus derived from use different contents PVA. also compare PVA commonly used low poly(vinylidene fluoride) binder. more in improving than PVDF. Increasing content increases pore tortuosity decreases wettability layer, compromising cell performance. To obtain high-performance separators, will need MP, good electrolyte strong bonding particles. should be controlled. Constructing layer greatly beneficial This provides insights into designing improved safety.