Fabrication of Flexible Solid-state Asymmetric Supercapacitor Device with BMS@LDH-based Electrode and PVA-KOH Gel Electrolyte
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초록
내용
Flexible solid-state supercapacitors have emerged as next-generation energy storage devices for modern electronics due to high power density, superior rate performance, outstanding operating safety, and long cycle life. Gel electrolyte is desirable thanks to superior ion conductivity to solid electrolytes and superior safety to liquid electrolytes. In this work, we fabricated a flexible solid-state asymmetric supercapacitor using a bimetal sulfide@layered double hydroxide (BMS@LDH) electrode, activated carbon (AC) electrode, and PVA/KOH gel polymer membrane as cathode, anode, and electrolyte, respectively. The cathode was synthesized through hydrothermal reaction and electrodeposition, and the anode was prepared by spray-coating and dip-coating of carbon slurry on nickel foam. The assembled flexible supercapacitor device delivers high energy (1.6 mW cm-2) and power density (1.21 mWh cm-2), surpassing recently reported flexible supercapacitors.