摘要
首次采用凝胶冷冻干燥法制备孔径为20 nm左右的钙钛矿型Li0.5La0.5Ti O3(LLTO)介孔固体电解质。通过X射线衍射、扫描电镜、比表面与孔隙分析对其晶体结构和介孔结构进行表征。交流阻抗分析结果显示,相比本体LLTO,介孔LLTO的室温晶粒电导率变化不大,但由于晶界数量的增加导致室温晶界电导率有所下降。将制得的介孔LLTO加入(PEO)8∶Li TFSI聚合物电解质中形成聚合物/介孔无机纳米复合固体电解质,其室温导电率达5.38×10-5S/cm,较纯(PEO)8∶Li TFSI提高了4.2倍。
For the first time the gel freeze-drying method was used to prepare peroverskite-type Li0. 5La0. 5Ti O3 mesoporous solid electrolyte. Its crystalline structure and porous structure were investigated by XRD,SEM,specific surface and pore size analyzer. Ac impedance analysis demonstrates that compared to the bulk LLTO,mesoporous LLTO has similar grain conductivity at room temperature,but relatively lower total conductivity due to the increase of grain boundaries. In addition with 10% mesoporous LLTO,the conductivity of the polymer electrolyte（ PEO）8∶ Li TFSI is significantly improved. At room temperature,the composite solid electrolyte with mesoporous LLTO has a conductivity of 5.38 × 10^-5S / cm,4. 2 times higher than that of pure（ PEO）8∶ Li TFSI.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2015年第8期139-143,共5页
Polymer Materials Science & Engineering
基金
国家自然科学基金优秀青年科学基金(51222305)
国家973重大科学研究计划青年科学家专题项目(2013CB934700)
