Room-temperature ionic conductivity of Ba,Y,Al co-doped Li_(7)La_(3)Zr_(2)O_(12)solid electrolyte after sintering  

作　　者：Xiao-Zhen Liu Lei Ding Yu-Ze Liu Li-Ping Xiong Jie Chen Xiao-Long Luo 

机构地区：[1]School of Chemical and Environmental Engineering,Shanghai Institute of Technology,Shanghai,201418,China [2]College of Economic and Management,Beijing Forestry University,Beijing,100083,China [3]Regenia AB,Stockholm,10691,Sweden

出　　处：《Rare Metals》2021年第8期2301-2306,共6页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.51572176 and 51372153);the Plateau Discipline Construction Program from Shanghai Municipal Education Commission(No.0817);the Collaborative Innovation Fund of Shanghai Institute of Technology(No.XTCX2017-5)。

摘　　要：The Ba,Y and A1 co-doped Li_(7)La_(3)Zr_(2)O_(12)(LLZO)was prepared by the solid-state reaction method.Effect of sintering on the crystallographic structure,morphology,total conductivity,relative density and contractibility rate of the prepared solid electrolyte was studied,respectively.The sintered samples were characterized by X-ray diffractometer(XRD),scanning electron microscopy(SEM),electrochemical impedance spectra(EIS)and inductively coupled plasma atomic emission spectrometry(ICP-AES)techniques,respectively.The cubic garnet phase Ba,Y and Al co-doped LLZO is obtained,and the room-temperature total conductivity of the Ba,Y and Al co-doped LLZO solid electrolyte is improved significantly by eliminating the grain boundary resistances and improving the densifications with controlling sintering temperature(T)and time(t),respectively.Sintering at 1160-1190℃for 12 h and at 1190℃for6-15 h,respectively,the Ba,Y and Al co-doped LLZO solid electrolytes are cubic garnet phase.Sintering at1180-1190℃for 12 h and at 1190℃for 12-18 h,respectively,SEM images of the cross section of the Ba,Y and Al co-doped LLZO solid electrolytes exhibit the distinctively flattened morphology without any noticeable grain boundaries.The total conductivity,relative density and contractibility rate of Li_(6.52)La_(2.98)-Ba_(0.02)Zr_(1.9)Y_(0.1)Al_(0.2)O_(12)solid electrolyte are 2.96×10^(-4) S·cm^(-1),94.19%and 18.61%,respectively.

关 键 词：Solid electrolyte Ionic conductivity SINTERING Li_(7)La_(3)Zr_(2)O_(12) Garnet 

分 类 号：TM912[电气工程—电力电子与电力传动] O646[理学—物理化学]