期刊
IONICS
卷 26, 期 8, 页码 4081-4093出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s11581-020-03565-x
关键词
Biomass; Supercapacitors; Pseudocapacitors; Energy storage; Activated carbon
资金
- Fundamental Research Grant Scheme (FRGS), Ministry of Higher Education [RDU 190142]
Activated carbon (AC) is a typical material for supercapacitor electrode fabrication and operates in the electrochemical double layer mechanism. Biomass-derived carbon is an attractive precursor of AC synthesis due to its renewable and cost-efficient properties. In this study, stinky bean orParkia javanicaseedpod (PJS) was used to produce AC using a chemical activation method, and the electrochemical properties was carefully investigated. The prepared AC activated at 700 degrees C (PJC-700) exhibited the optimum edge fraction (0.254), the average number of layer planes in a crystallite (1.935), pore size distribution (1.9 nm) andI(D)/I(G)ratio (0.796) properties. The electrode shows specific capacitance of 248 F/g @ 25 mV/s and 193 F/g @ 0.5 A/g in 1 M KOH electrolyte. The AC delivered energy density of 10.58 Wh/kg at power density 720 W/kg in symmetric cell configuration. Moreover, PJC-700 achieved similar to 94% of capacitance retention after 10,000 cycles at 3 A/g current density.
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