This paper discussed in details the impact of binder polyvynilidene fluoride (PVDF) concentrations (5, 10 and 20 wt%) and pressures (
382
891
1783 and
2547 MPa) for the fabrication of electrodes based on Carbon nanofibers (CNFs) for supercapcitors. The surface area, pore size distribution and morphology were characterized by Brunauer–Emmett–Teller (BET) method and SEM. The decrease in specific surface area was about 31% and pore volume 14.6% with increase in PVDF concentration from 5 to 20 wt% at
891 MPa pressure. The assembled electrodes were tested with two electrode system in aqueous electrolyte. The specific capacitance was 80 F/g for lowest concentration of PVDF (5 wt%) and decreased about 28.3% with increase concentrations at same pressure
891 MPa. In comparing the effect of pressure on specific capacitance, it increases about 38% for (PVDF, 10 wt%; pressure
1783 MPa) from (PVDF, 10 wt %; pressure
891 MPa); their corresponding power density 24502W/kg at energy density of 6.8Wh/Kg and 19886W/kg at energy density energy of 3.8 Wh/kg. ESR values increase from 0.3 to 1.9V with increase in PVDF concentration and decrease again to 0.5V with increase in pressure. The results show optimal conditions are 10 wt% of PVDF and higher pressure of
891 MPa.

العنوان

Electrochimica Acta

الناشر

Elsevier

بلد الناشر

هولندا

Indexing

Thomson Reuters

معامل التأثير

5,38

نوع المنشور

Both (Printed and Online)

المجلد

245

السنة

2017

الصفحات

531-538