CAJ | 학술논문

采用溶胶-凝胶法,添加不同比例的Li3PO4助熔剂,合成Li1.3Al0.3Ti1.7(PO4)3锂离子固体电解质烧结片,采用X射线衍射、扫描电子显微镜研究合成产物的结构与形貌,采用循环伏安及交流阻抗技术研究添加不同摩尔分数的Li1.3Al0.3Ti1.7(PO4)3固体电解质烧结片的结构、氧化-还原电位、离子电导率和活化能.结果表明:添加与未添加Li3PO4助熔剂的Li1.3Al0.3Ti1.7(PO4)3烧结片具有相似的X射线衍射结果.添加Li3PO4的Li1.3Al0.3Ti1.7(PO4)3烧结片的空隙率较小,更为致密.添加Li3PO4对Li1.3Al0.3Ti1.7(PO4)3的氧化-还原电位影响不大.在所有添加Li3PO4助熔剂的Li1.3Al0.3Ti1.7(PO4)3烧结片中,添加1％(摩尔分数)Li3PO4的烧结片具有最高的离子电导率6.15×10-4 S/cm和最低的活化能0.314 2 eV.
채용용효-응효법,첨가불동비례적Li3PO4조용제,합성Li1.3Al0.3Ti1.7(PO4)3리리자고체전해질소결편,채용X사선연사、소묘전자현미경연구합성산물적결구여형모,채용순배복안급교류조항기술연구첨가불동마이분수적Li1.3Al0.3Ti1.7(PO4)3고체전해질소결편적결구、양화-환원전위、리자전도솔화활화능.결과표명:첨가여미첨가Li3PO4조용제적Li1.3Al0.3Ti1.7(PO4)3소결편구유상사적X사선연사결과.첨가Li3PO4적Li1.3Al0.3Ti1.7(PO4)3소결편적공극솔교소,경위치밀.첨가Li3PO4대Li1.3Al0.3Ti1.7(PO4)3적양화-환원전위영향불대.재소유첨가Li3PO4조용제적Li1.3Al0.3Ti1.7(PO4)3소결편중,첨가1％(마이분수)Li3PO4적소결편구유최고적리자전도솔6.15×10-4 S/cm화최저적활화능0.314 2 eV.
The sintered Li1.3Al0.3Ti1.7(PO4)3 pellets with different mole fractions of Li3PO4 were prepared by sol-gel method.The structure,surface morphology,electrochemical window,ionic conductivity and activation energy of the sintered pellets were studied by X-ray diffraction,scan electron microscopy,cyclic voltammetry,and electrochemical impedance spectroscopy.The results show that all the sintered Li1.3Al0.3Ti1.7(PO4)3 pellets with different mole fractions of Li3PO4 have similar X-ray diffraction patterns.The sintered Li1.3Al0.3Ti1.7(PO4)3 pellet with Li3PO4 shows a lower porosity and is denser than the one without Li3PO4.The addition of Li3PO4 has a large effect on the porosity and density of the sintered Li1.3Al0.3Ti1.7(PO3)4 pellet,and little effect on its electrochemical window.Among the sintered Li1.3Al0.3Ti1.7(PO3)4 pellets with different mole fractions of Li3PO4,the one with 1％ Li3PO4 shows the activation energy of 0.314 2 eV and the highest ionic conductivity of 6.15 × 10-4 S/cm.