Prototype symmetric configured MWCNTs/Fe2O3 based solid-state supercapacitor

Prototype solid-state symmetric supercapacitor (SSS) device has been designed by using two MWCNT/Fe2O3 electrodes assembled through polyvinyl alcohol-lithium chloride gel electrolyte as mediator onto flexible stainless steel substrate. Through electrochemical investigation as-fabricated device demonstrated 70.16 F g(-1) of specific capacitance with remarkable 9.74 W h kg(-1) specific energy and 487 W kg(-1) specific power at current density of 0.57 A g(-1). Assembled device delivers an outstanding volumetric energy of 24.36 mW h cm(-3) compensating volumetric power of 1218 mW cm(-3) at a current density of 1.42 mA cm(-3). The cycle repeatability test of MWCNTs/Fe2O3 SSS device exhibited capacitance retention of 75% for 1500 cycles.

Automated summary

Researchers have designed a prototype solid-state symmetric supercapacitor (SSS) device with excellent specific capacitance, energy and power properties. The device demonstrates stable cycle repeatability and opens up new possibilities for electrochemical energy storage.