Cu-ZSM-5 type molecular sieves were synthesized hydrothermally in weak acid medium in the presence of F- ions. The structures of these samples were investigated.Increasing the amount of copper in synthesized samples t...Cu-ZSM-5 type molecular sieves were synthesized hydrothermally in weak acid medium in the presence of F- ions. The structures of these samples were investigated.Increasing the amount of copper in synthesized samples the unit cell volumes of Cu-ZSM-5 zeolites increase, while the adsorption peaks of Cu-ZSM-5 shift to lower wavenumbers.These facts and the results of the electron probe micrograph and XPS analyese indicate that copper was introduced into the framework of molecular sieve.展开更多
锂离子二次电池是手提设备的重要电力来源。近年来,人们为了寻找更新颖更好的锂离子电极材料,开始研究晶形离子交换材料,这种材料具有开放孔道,能够让离子在多孔框架里自由的进出。一种具有层状结构的钛硅酸盐Na-JDF-L1(Na_4Ti_2Si_8O_(...锂离子二次电池是手提设备的重要电力来源。近年来,人们为了寻找更新颖更好的锂离子电极材料,开始研究晶形离子交换材料,这种材料具有开放孔道,能够让离子在多孔框架里自由的进出。一种具有层状结构的钛硅酸盐Na-JDF-L1(Na_4Ti_2Si_8O_(22)·4H_2O)经过离子交换后被用作锂离子负极材料。它在循环200次后放电容量保持在364 m Ah·g^(-1),并且库伦效率约为100%。通过将TiO_2引入Li(Na)-JDF-L1中,有效的提高了材料的首次库伦效率和倍率放电性能。展开更多
文摘Cu-ZSM-5 type molecular sieves were synthesized hydrothermally in weak acid medium in the presence of F- ions. The structures of these samples were investigated.Increasing the amount of copper in synthesized samples the unit cell volumes of Cu-ZSM-5 zeolites increase, while the adsorption peaks of Cu-ZSM-5 shift to lower wavenumbers.These facts and the results of the electron probe micrograph and XPS analyese indicate that copper was introduced into the framework of molecular sieve.
文摘锂离子二次电池是手提设备的重要电力来源。近年来,人们为了寻找更新颖更好的锂离子电极材料,开始研究晶形离子交换材料,这种材料具有开放孔道,能够让离子在多孔框架里自由的进出。一种具有层状结构的钛硅酸盐Na-JDF-L1(Na_4Ti_2Si_8O_(22)·4H_2O)经过离子交换后被用作锂离子负极材料。它在循环200次后放电容量保持在364 m Ah·g^(-1),并且库伦效率约为100%。通过将TiO_2引入Li(Na)-JDF-L1中,有效的提高了材料的首次库伦效率和倍率放电性能。
