“…Over the past decades, in face of the excessive consumption of fossil energy and increasingly severe energy supply as well as environment pollution problem, developing sustainable and ecofriendly energy have become very urgent [1,2,3]. As the next-generation energy storage device, supercapacitors have much higher energy storage capacity and power density than traditional physical capacitors [4,5,6]. As is well known, the pseudo capacitor store charges via the redox process, which can provide a higher energy density in the faster charge-discharge than electrical double-layer capacitor (EDLC) [7,8,9].…”