Microstructure and electrochemical properties of the HT-LiCoO_2/La_2/3-xLi_3xTiO_3 solid electrolyte interfaces
Microstructure and electrochemical properties of the HT-LiCoO_2/La_2/3-xLi_3xTiO_3 solid electrolyte interfaces
复制标题
DOI：
10.1557/jmr.2010.0203
复制
发表时间：
2010-08
影响因子：
2.7
通讯作者：
K. Kishida;N. Wada;Y. Yamaguchi;H. Inui;M. Demura;Y. Iriyama;Z. Ogumi
中科院分区：
文献类型：
--
作者：
K. Kishida;N. Wada;Y. Yamaguchi;H. Inui;M. Demura;Y. Iriyama;Z. Ogumi
通过在不同表面处理的多晶钛酸镧锂（LLT）上沉积HT-LiCoO_2阴极，制备了3种不同类型的HT-LiCoO_2/LLT组装体，研究了HT-LiCoO_2/LLT界面结构对组装体电化学性能的影响。非晶层被证实是通过Ar离子辐照引入结晶LLT。由离子辐照LLT组成的HT-LiCoO_2/LLT组装体具有良好的循环稳定性和较低的表观界面电阻率。这些结果表明，通过对LLT晶体表面改性引入非晶态LLT层，可以有效地改善HT-LiCoO_2与LLT晶体界面的结构稳定性和锂离子导电性。
Three different types of HT-LiCoO_2/lithium lanthanum titanate (LLT) assemblies were produced by depositing an HT-LiCoO_2 cathode on polycrystalline LLT with various surface finishes, to investigate the effects of the HT-LiCoO_2/LLT interface structure on the electrochemical properties of the assemblies. An amorphous layer is confirmed to be introduced by Ar ion irradiation to crystalline LLT. The HT-LiCoO_2/LLT assembly composed of the ion-irradiated LLT exhibits good cycle stability and relatively low apparent interface resistivity. These results indicate that the introduction of an amorphous LLT layer by surface modification of crystalline LLT is very effective in improving the structural stability and lithium-ion conductivity of the interface between HT-LiCoO_2 and crystalline LLT.