NEW SOLID MEDIUM FOR ELECTROCHEMISTRY AND ITS APPLICATION TO DYE-SENSITIZED SOLAR CELLS - Energy Research Developments: Tidal Energy, Energy Efficiency and Solar Energy - page 119

Table 2. Double layer capacitance of 2 wt% agarose and 2 wt% κ -carrageenan solids
containing 0.1 M KCl, 0.1 M KNO 3 , 0.1 M KI, 0.1 M CsCl, or 0.1 M CaCl 2 [5]

Double Layer Capacitance / mF

0.1M KCl 0.1M KNO 3 0.1M KI 0.1M CsCl 0.1M CaCl 2

aq.solution 15.33 18.13 15.33 17.41 18.18

2wt% Agarose 15.56 18.13 15.56 16.91 16.61

2wt% κ-Carrageenan 18.26 18.50 18.26 17.11 16.73

Impedance spectra of 1-5 wt% agarose containing 0.1 M KCl are shown in figure 11.
This figure is quite different from figure 10 in that the ionic conductivity changed with
changing the concentration of the polysaccharide (inset of figure 11).

Figure 11. Impedance spectra of 1-5 wt% agarose solids containing 0.1 M KCl aqueous solution at the
rest potential [5].

Table 3. Double layer capacitance of 1-5 wt% agarose solid containing 0.1 M KCl [5]

Agarose
/ wt%

Double Layer
Capacitance / mF

1 70.21

2 61.62

3 61.84

4 59.91

5 70.43