Schematic diagram of porous graphitic carbon by carbonizing the mixture of willow catkins, Fe(NO ) , and KCl. The obtained 3 3 PGCN which inherited the natural microtubular morphology of willow catkins had high graphitized and porous structure. Keywords Biomass · Porous graphitic carbon · Graphitization · Activation · Manganese oxide 1 Introduction With diminishing fossil fuel reserves and worsening envi- ronmental conditions worldwide, the demand for renewable * Qing Cao and clean energy sources has increased . Supercapaci- email@example.com tors, as promising electrochemical energy storage systems, 1 have drawn great interest due to their high power density, College of Chemistry and Chemical Engineering, Taiyuan excellent pulse charge–discharge characteristics, long cycle University of Technology, Taiyuan 030024, China Vol.:(0123456789) 1 3 416 Journal of Applied Electrochemistry (2018) 48:415–426 life, and environment friendliness . As a class of pseu- have successfully prepared PGCs with large S and high BET docapacitive active materials for supercapacitors, transi- conductivity by simultaneously introducing FeCl and ZnCl 3 2 tion metal oxides, such as MnO , CoO, Co O , NiO, and into a carbon precursor [14, 15]. Nevertheless, the high ratio 2 3 4 Co(OH) , possess high specific capacitance because of their of ZnCl /carbon precursor (≈ 1–3) leads to low carbon
Journal of Applied Electrochemistry – Springer Journals
Published: Feb 23, 2018
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