Supercapacitors have emerged as a popular area of research due to their exceptional attributes, including excellent cycling life, admirable power density, and rapid charge/discharge capabilities. However, the low energy density significantly restricts its range of applicable scenarios. Herein, the grafting copolymerization technique was employed to incorporate transition metals (nickel, cobalt) into the molecular chain of lignin, and lignin-based pseudocapacitor material (Ni/Co@LC) is obtained after thermal treatment. XRD, X-ray photoelectron spectroscopy, scanning electron microscopy, and ene...
