Binuclear transition metal phthalocyanines with superior performance as electrocatalysts for lithium/thionyl chloride battery

A novel series of binuclear transition metal phthalocyanines M ₂Pc₂HnC (M = Mn(II), Fe(II), Co(II), Ni(II), and Cu(II)) were developed for highly efficient electrocatalysts to lithium/thionyl chloride (Li/SOCl₂) battery. The capacity of the battery can increase approximately by 40-65% when the binuclear compounds are present in the electrolyte of the battery. To investigate the effect of the binuclear metal phthalocyanines on Li/SOCl₂ battery further, this work studied the electrocatalytic reaction of the binuclear compounds to the battery by electrochemical methods (cyclic voltammetry) and other characterization means. The results demonstrate that the order of the electrocatalytic activity of the binuclear compounds with diverse center metal ions is: Fe(II) > Co(II) > Mn(II) > Ni(II) > Cu(II).