Assembly of manganese dioxide/polypyrrole electrode//activated carbon flexible asymmetric supercapacitor with excellent electrochemical performances

• DOI: 10.1002/aoc.7497
• Publication Date: 2024-04-23T02:49:21Z
• Authors: Shaoning Ma; Wei Wang; Ruimin Huang; Jiao Hou; Xingwei Wang; Xingke Che; Qiang Ren; Yixuan Li; Chunping Hou
• Keywords: Polypyrrole; Power density

Manganese dioxide (MnO 2 ) often suffers from a slow electron transport, and so improving the charge transport capability of MnO is imminent. In here, crossed nanosheets grown on carbon cloth (CC) are fabricated firstly subsequently coated with layer polypyrrole (PPy) to prepare CC/MnO /PPy (CC/MP) electrode. At 1 A g −1 , prepared electrode able deliver specific capacitance 328 F . The flexible asymmetric supercapacitor consists CC/MP CC/activated (CC/AC) separately as positive negative electrodes PVA‐H SO 4 gel electrolyte. assembled device exhibits 123.96 at 10 mV s reaches voltage window 1.6 V, has retention 96.46% after 8000 cycles, produces an energy density 25.67 W h kg power 401.79 well 8.78 3902.22 two devices in series can illuminate 1.8 V red light‐emitting diode (LED) light. These excellent electrochemical properties ascribed unique heterostructure composite. outcomes indicate that corresponding have huge potential applications next‐generation high‐performance devices.