Dimensional stability and electrochemical behaviour of ZrO incorporated electrospun PVdF-HFP based nanocomposite polymer membrane electrolyte for Li-ion capacitors.

Different weight percentages of ZrO (0, 3, 5, 7 and 10 wt%) incorporated electrospun PVDF-HFP nanocomposite polymer membranes (esCPMs) were prepared by electrospinning technique. They were activated by soaking in 1 M LiPF containing 1:1 volume ratio of EC : DMC (ethylene carbonate:dimethyl carbonate) to get electrospun nanocomposite polymer membrane electrolytes (esCPMEs). The influence of ZrO on the physical, mechanical and electrochemical properties of esCPM was studied in detail. Finally, coin type Li-ion capacitor cell was assembled using LiCoMnO as the cathode, Activated carbon as the anode and the esCPME containing 7 wt% of ZrO as the separator, which delivered a discharge capacitance of 182.5 Fg at the current density of 1Ag and retained 92% of its initial discharge capacitance even after 2,000 cycles. It revealed that the electrospun PVdF-HFP/ZrO based nanocomposite membrane electrolyte could be used as a good candidate for high performance Li-ion capacitors.