Substitution Effect of Framework Constituents on Electrical Property of Solid Electrolytes with β -Fe2(SO4)3-Type Structure, M1+xZr2P3−xSixO12(M = Li, 1/2Mg, and 1/2Zn)

Abstract An enhancement of electric conductivity was observed by substitution of Si4+ for P5+ in LiZr2(PO4)3, MgZr4(PO4)6, and ZnZr4(PO4)6 solid electrolytes with a β-Fe2(SO4)3-type structure. An increase in the concentration of interstitial Li+ ion resulted in the conductivity enhancement for the Li compound, whereas an increase in the compactness of sintered specimen for the Mg and Zn compounds.