화학공학소재연구정보센터
Journal of Physical Chemistry B, Vol.102, No.44, 8678-8685, 1998
Electron self-exchange in redox polymers. 2. A study of ion aggregation and intermolecular interactions
The diffusion-migration equation (derived in part 1) is subjected to the analysis of steady-state current-potential responses and the effects of intermolecular interaction between neighboring particles and ion association between the electroactive and electroinactive species on maximal limiting current and the corresponding redox composition are studied both in the presence and absence of site diluent. The variation of the apparent diffusion coefficient with molar fraction of redox active species is analyzed as a function of the ion pairing constant and interaction energetics. The steady-state analysis suggests that the transport equation is valid only for a small region of interaction energy and breaks down when its value exceeds the order of k(B)T. The possibility of phase separation in redox polymers is also discussed.