Preparation of polymer-coated separators using an electron beam irradiation

Polymer composites and blends for battery separators: State of the art, challenges and future trends

“…P(VDF-HFP)/PMMA polymer blend coated PE separators by a simple dip-coating process as a function of P(VDF-HFP)/PMMA compositions showed a degree of porosity, liquid electrolyte uptake and ionic conductivity largely affected by the P(VDF-HFP)/PMMA mixture ratio [191]. P(VDF-HFP)/PEGDMA coated PE separator for lithium ion battery applications can be also prepared by electron beam irradiation (EB), the EB treatment reducing thermal shrinkage through the cross-linked networks [203]. The SEM images of the commercial PE separator and the PE separators modified by P(VDF-HFP)/PEGDMA-coating and irradiation at 150 kGy are shown in Fig.…”

Battery performance of PMMA-grafted PE separators prepared by pre-irradiation grafting technique

“…In the case of the PE separator, the impedance decreased rapidly at around 130 8C. This rapid decrease in the impedance could be due to an electrical short circuit caused by the thermal shrinkage of the PE separator in a test cell [1,6,7,9,10]. In the case of the PE-g-PMMA separators, the impedance increased rapidly at a certain temperature.…”

“…This thermal shrinkage (TS) could accelerate the thermal runaway of a battery and potentially cause explosions. Thus the separator must not shrink significantly at a higher temperature to ensure a battery's safety [1,[6][7][8]. In addition, the separators should have a thermal shutdown for a battery's safety.…”

Polyethylene battery separator with auto‐shutdown ability, thermal stability of 220°C, and hydrophilic surface via solid‐state ultraviolet irradiation

“…Another well‐known method to increase the thermal stability of PE materials is through cross‐linking . By now a couple of studies have been carried out to cross‐link the PE separator through electron beam irradiation, γ‐ray radiation, etc. The thermal stability was truly increased compared with untreated PE separator.…”