通过改性由酸蚀二维蛭石制备的二维二氧化硅,得到带正电荷的二维介孔二氧化硅(PSN+)纳米片,并将PSN+用作聚环氧乙烷(PEO)基固体聚合物电解质(SPEs)的填料。由于PSN+具有丰富的正电荷,PSN^(+)与锂盐解离的阴离子能够有效结合,从而促进锂...通过改性由酸蚀二维蛭石制备的二维二氧化硅,得到带正电荷的二维介孔二氧化硅(PSN+)纳米片,并将PSN+用作聚环氧乙烷(PEO)基固体聚合物电解质(SPEs)的填料。由于PSN+具有丰富的正电荷,PSN^(+)与锂盐解离的阴离子能够有效结合,从而促进锂离子的运输,获得较好的锂离子转移数。在50℃时,基于PSN^(+)的SPEs表现出较高的离子电导率(7.5×10^(-5)S·cm^(-1)),锂离子迁移数为0.30,稳定电压窗为4.41 V。因此,组装后的LiFePO_(4)锂电池在50℃、0.2C下具有优异的初始放电比容量(155.7 m Ah·g^(-1)),在循环100次后容量保持率为97.1%。展开更多
Lead zirconate titanate(PSN-PZT) is widely utilized in various areas based on its desirable piezoelectrical properties and stable performance.In order to further improve its electrical properties,the ceramic samples,w...Lead zirconate titanate(PSN-PZT) is widely utilized in various areas based on its desirable piezoelectrical properties and stable performance.In order to further improve its electrical properties,the ceramic samples,which have been prepared by traditional solid-state sintering,then are re-heated by strong laser beam.Phase composition and micro-structure have been characterized through XRD,SEM and TEM.Also,Quasi-static d_(33) tester and the capacitance tester have been introduced for measuring electrical performances.The experimental results indicate that the ceramic samples are with more amount percentage tetragonal phase after laser re-heating.Cracks could be induced and initialized by higher input laser intensity.TEM results suggested that,when the input laser power is at 1000 W,tetragonal and rhombohedral phases are co-existed and the ceramic samples are with the best electrical properties.The ceramics heated by power of 1000 W present excellent electric properties,d_(33) increased 24.8%,and tanS decreased 9%,which is distinguish advance compared with original ceramics in solid reaction.展开更多
文摘通过改性由酸蚀二维蛭石制备的二维二氧化硅,得到带正电荷的二维介孔二氧化硅(PSN+)纳米片,并将PSN+用作聚环氧乙烷(PEO)基固体聚合物电解质(SPEs)的填料。由于PSN+具有丰富的正电荷,PSN^(+)与锂盐解离的阴离子能够有效结合,从而促进锂离子的运输,获得较好的锂离子转移数。在50℃时,基于PSN^(+)的SPEs表现出较高的离子电导率(7.5×10^(-5)S·cm^(-1)),锂离子迁移数为0.30,稳定电压窗为4.41 V。因此,组装后的LiFePO_(4)锂电池在50℃、0.2C下具有优异的初始放电比容量(155.7 m Ah·g^(-1)),在循环100次后容量保持率为97.1%。
基金financial support of the International cooperation project of Guizhou Province[No.(2013)3075)]the Science and technology support project of Guizhou Province[No.(2012)7010]
文摘Lead zirconate titanate(PSN-PZT) is widely utilized in various areas based on its desirable piezoelectrical properties and stable performance.In order to further improve its electrical properties,the ceramic samples,which have been prepared by traditional solid-state sintering,then are re-heated by strong laser beam.Phase composition and micro-structure have been characterized through XRD,SEM and TEM.Also,Quasi-static d_(33) tester and the capacitance tester have been introduced for measuring electrical performances.The experimental results indicate that the ceramic samples are with more amount percentage tetragonal phase after laser re-heating.Cracks could be induced and initialized by higher input laser intensity.TEM results suggested that,when the input laser power is at 1000 W,tetragonal and rhombohedral phases are co-existed and the ceramic samples are with the best electrical properties.The ceramics heated by power of 1000 W present excellent electric properties,d_(33) increased 24.8%,and tanS decreased 9%,which is distinguish advance compared with original ceramics in solid reaction.
