Tailored perovskite Li_0.33La_0.56TiO₃ via an adipic acid-assisted solution process: A promising solid electrolyte for lithium batteries

다국어 초록 (Multilingual Abstract)

<P><B>Abstract</B></P> <P>We prepared and optimized the ionically conducting perovskite-type Li<SUB>0.33</SUB>La<SUB>0.56</SUB>TiO<SUB>3</SUB> by an adipic acid-assisted sol-gel process. A high ionic conductivity of 0.131 mS cm<SUP>−1</SUP> was obtained at an ambient temperature by adjusting the synthesis temperature, holding time, and cooling process. A dramatic improvement in the Li<SUB>0.33</SUB>La<SUB>0.56</SUB>TiO<SUB>3</SUB> conductivity was noted in each step. Interestingly, a tetragonal-to-cubic structural transition was evident during the quenching process unlike in the conventional slow cooling process. An increase in the bottleneck site volume was observed that facilitated Li<SUP>+</SUP> ion migration for enhanced conductivity.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Adipic acid assisted sol-gel process is utilized to prepare Li<SUB>0.33</SUB>La<SUB>0.56</SUB>TiO<SUB>3</SUB>. </LI> <LI> High ambient temperature ionic conductivity of 0.131 mS cm<SUP>−1</SUP> is realized. </LI> <LI> Transition from tetragonal to cubic is one of the main reason for such conductivity. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>