LiBr・H_2O-Al_2O_3の複合系固体電解質のNMRによる研究(<小特集>セラミック材料小特集)

概要

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Enhancement of ionic conductivity in the LiBr・H_2O-Al_2O_3 composite solid electrolyte was studied by means of the ^7Li spin-lattice relaxation time T_1. In α-LiBr・H_2O,T_1 was determined by the Li diffusion with an activation energy of 52 kJ mol^<-1>. In the composite solid electrolyte, two values of T_1 were observed at each temperature. One of them was attributed LiBr・H_2O, because it had the same value as T_1 of LiBr・H_2O, while the other had a very low activation energy of 18 kJ mol^<-1>. This is the first time that the presence of a highly conductive phase in the composite solid electrolyte has been confirmed experimentally. Magnetization showed that the volumes of these two phases were about equal. The thickness of the highly conductive layer on an alumina particle was estimated to be 0.07〜0.2 μm.
社団法人日本材料学会の論文
1984-11-15