High stability gel electrolytes for long life lithium ion solid state supercapacitor

Lithium ion capacitors with liquid electrolyte are prone to leakage, combustion, explosion and other dangerous accidents. To solve these problems, the solid gel separator prepared by polyvinylidene fluoride - six fluoropropene (PVDF-HFP) is used in this work improve safety stability of lithium supercapacitors. The PVDF-HFP based was replace commercial capacitor. solid-state supercapacitor matched porous carbon (PC) hard (HC). maximum energy density device 148.76 wh/kg, even at power 33.6 kW/kg, which still retains 20.6 wh/kg. In addition, 83.3% capacity lithium-ion retained after 8000 times charge discharge. requirements high density, cycle realized.