A new kind of high-performance asymmetric supercapacitor is designed with pyrolyzed bacterial cellulose (p-BC)-coated MnO2 as the positive electrode material and nitrogen-doped p-BC as the negative electrode material, via an easy, efficient, large-scale, and green fabrication approach as described by Shu-Hong Yu and co-workers, on page 4746. The optimal asymmetric device possesses an excellent supercapacitive behavior with quite high energy and power density.
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