PVDF-HFP/PMMA-coated PE separator for lithium ion battery

Fabrication of a novel sandwich-like composite separator with enhanced physical and electrochemical performances for lithium-ion battery

“…1. With the increasing proportion of PMMA, fewer pores are observed on the surfaces, and the pore sizes of separators tend to become smaller due to the specific interaction between PMMA and PVdF-HFP matrix [36]. So it is necessary to keep the contents of PMMA in an appropriate range.…”

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

“…Table 13 shows that the polymer blends most often used in battery separator applications are P(VDF-HFP)/PAN, PVDF/ PMMA and P(VDF-HFP)/PMMA. 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].…”

“…[190] 1 M LiClO 4 in EC/DEC (1/1) 1.7 Â 10 À3 (25 C) Improved rate capability and cycle stability. [191] BMIPF 6 þ LiPF 6 0.45 Â 10 À3 (25 C) High specific capacity at moderate rates and good cycling performances. [192] 1 M LiTFSI in TEGDME 3.4 Â 10 À3 (25 C) High specific capacity of 753.8 mAh/g at the initial cycle; stable reversible cycling and capacity retention of 80% over 40 cycles.…”

Flexible inorganic membranes used as a high thermal safety separator for the lithium-ion battery

“…30,31 Therefore, the wettability of the separator with the liquid electrolyte plays an important role in battery performance. The time dependence of the contact angle between the surface of the electrolyte and the separator surface reects the wettability of the separator, which was measured and showed in Fig.…”