The Nanometer（Li₂SO₄）_1-x-（ZrO₂）_x Solid Electrolyte Ceramics

The nanometer Li₂SO₄-ZrO₂ ceramics with varying ZrO₂ content have been prepared by mixing Zr（OH）4 gel and Li₂SO₄ solution. The average grain size of Li₂SO₄ and ZrO₂ is 45nm and 27 nm separately. As a result of the grain nano-size, amounts of interface and surface structure are led into the composite ceramics, which made the Li₂SO₄ phase-transition temperature decreased greatly. We studied the effect of the ZrO₂ content on the Li₂SO₄ phase-transition temperature, behavior and ionic conductivity. The nanometer ZrO₂ made the Li₂SO₄ phase-transition temperature decreased by 140℃. The ionic conductivity is 0.2S/cm at 540℃ while the ZrO₂ content is appropriate.