Highly Conductive Redox-Couple Solid Polymer Electrolyte System: Blend-KI-I₂ for Dye-Sensitized Solar Cells

Table 1

Melting temperature (𝑇_𝑚), crystal to plastic crystal phase transition (𝑇_𝑝𝑐), glass transition temperature (𝑇_𝑔), change in enthalpy (Δ𝐻_𝑚), relative crystallinity (𝜒), ionic conductivity (𝜎₂₅^∘_𝐶), preexponential factor (𝐴), and pseudo activation energy (𝐸_𝑎) of the solid polymer electrolyte system, (1−𝑥)[PEO-SN]: 𝑥[0.9KI: 0.1I₂].

Composition		𝑇𝑚 [°C]	𝑇pc [°C]	𝑇𝑔[°C]	Δ𝐻𝑚[J g^−1]	𝜒 [%]	𝜎25^∘C [S cm^−1]	𝐴 [S cm^−1 K^0.5]	𝐸𝑎[eV]
𝑥 [wt. fraction]	[O]/[K^+] [mole ratio]
0	∞	30.1	−34.7	−60	48.7	25.2	1×10^−8	—	—
0.05	39.8	29.1	—	−46.4	16.3	8.4	3.6×10^−5	141	0.14
0.1	18.8	14.6	—	−46	~0.1	~0	6.5×10^−4	8.5	0.081
0.15	11.9	11.5	—	−46.1	~0.4	~0	7×10^−4	14.1	0.086