Paper-making black liquor lignin carbon nanosheets and multilayer graphene derived from Ni2+ catalytic graphitisation were assembled in block-activated woodceramics to prepare supercapacitor electrode materials ([email protected]) in an environmentally friendly manner. Na2CO3 activation, Ni-doping, and catalytic graphitisation were completed synchronously, and the natural hierarchical pore structure of wood was partly maintained. During the sintering process, Ni2+ was reduced to Ni nanoparticles and embedded into the carbon template to form the...
