Papers by Keyword: Cerium Electrolyte

Abstract: The effect of sulfosalicylic acid (SSA) on the electrochemical behaviour of Ce³⁺/Ce⁴⁺ redox couple was studied using voltammetry at stationary electrode and rotating disc electrode (RDE). When the SSA was added to the Ce³⁺/Ce⁴⁺ electrolyte there was change to the peak current and peak potential, i.e. the increase of peak current and the decrease of peak potential difference. The diffusion coefficient of Ce³⁺ is 6.5 × 10^-6 cm² s^-1 and the standard rate constant of the Ce³⁺/Ce⁴⁺ redox reaction is 3.2 × 10^-4 cm s^-1 in the presence of SSA, which are all larger than that in the absence of SSA (3.6 × 10^-6 cm² s^-1, 2.0 × 10^-4 cm s^-1). Therefore, the SSA as the additive in the supporting electrolyte for a cerium redox flow battery (RFB) application will result in a high voltage efficiency and will satisfy an important requirement for a RFB electrolyte.