Asymmetric Paper Supercapacitor Based on Amorphous Porous Mn3O4 Negative Electrode and Ni(OH)2 Positive Electrode: A Novel and High-Performance Flexible Electrochemical Energy Storage Device

Here we synthesize novel asymmetric all-solid-state paper supercapacitors (APSCs). based on amorphous porous Mn3O4 grown on conducting paper (NGP), (Mn3O4/NGP) negative electrode and Ni(OH)(2) grown on NGP (Ni(OH)(2)/NGP) as positive electrode, and they have attracted intensive research interest owing to their, outstanding properties such as being flexible, ultrathin; and lightweight. The fabricated APSCs exhibit a high areal C-sp of 3.05 F/cm(3) and superior cycling stability The novel asymmetric APSCs also exhibit high energy density of 0.35 mW h/cm(3), high power density of 32.5 mW/cm(3), and superior cycling performance (<17% capacitance loss after 12 000 cycles at a high scan rate of 100 mV/s). This work shows the first example of amorphous porous metal oxide/NGP electrodes for the asymmetric APSCs; and these systems hold great potential for future flexible electronic devices.