Morphological, dielectric and transport properties of garnet-type Li6.25+yAl0.25La3Zr2-yMnyO12 (y=0, 0.05, 0.1, and 0.2)

被引：23
作者：
Dubey, Brahma Prakash [1 ]
Sahoo, Asit [1 ]
Thangadurai, Venkataraman [2 ]
Sharma, Yogesh [1 ]
机构：
[1] Indian Inst Technol Roorkee, Dept Phys, Roorkee 247667, Uttarakhand, India
[2] Univ Calgary, Dept Chem, 2500 Univ Dr NW, Calgary, AB T2N 1N4, Canada
来源：
SOLID STATE IONICS | 2020年 / 351卷
关键词：
LI-ION CONDUCTIVITY; DOPED LI7LA3ZR2O12; SOLID-ELECTROLYTE; PHASE-TRANSITION; CRYSTAL-STRUCTURE; SITE OCCUPATION; AIR STABILITY; AL; TA; GA;
D O I：
10.1016/j.ssi.2020.115339
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Garnet-type solid Li ion conductor Li7La3Zr2O12 (LLZO) has received considerable attention due to its high total (bulk + grain boundary) ionic conductivity at room temperature and its chemical stability with Li metal. To improve the ionic conductivity of LLZO, the hetrovalent doping at Zr-site and Al-doping at Li site was done for the optimization of Li concentration in LLZO. Thus, considering prominent role of various dopant in ionic and/or electronic conduction of LLZO, the effect of Mndoping at Zr-site in the Al-doped Li6.25+yAl0.25La3Zr2-yMnyO12 (y = 0, 0.05, 0.1, 0.2) on the microstructure, dielectric and transport properties is studied. The Mndoping at Zr-site in Al-LLZO is confirmed by electron paramagnetic resonance and X-ray photoelectron spectroscopy techniques. A correlation between structure, microstructure and the Li+ ion conduction is established. Amongst all investigated compounds, Li6.35Al0.25La3Zr1.9Mn0.1O12 exhibit highest total ionic conductivity of 0.34 x 10(-4) Scm(-1) at 25 degrees C. Further, the electrochemical window and stability of Mn doped-LLZO with Li metal is examined by cyclic voltammetry.
引用
收藏
页数：11
相关论文
共 83 条
[21]   Electrochemical Stability of Li10GeP2S12 and Li7La3Zr2O12 Solid Electrolytes [J].
Han, Fudong ;
Zhu, Yizhou ;
He, Xingfeng ;
Mo, Yifei ;
Wang, Chunsheng .
ADVANCED ENERGY MATERIALS, 2016, 6 (08)
[22]  
Han XG, 2017, NAT MATER, V16, P572, DOI [10.1038/nmat4821, 10.1038/NMAT4821]
[23]   Studies on dielectric properties, opto-electrical parameters and electronic polarizability of thermally evaporated amorphous Cd50S50-xSex thin films [J].
Hassanien, Ahmed Saeed .
JOURNAL OF ALLOYS AND COMPOUNDS, 2016, 671 :566-578
[24]   Preparation and electrochemical properties of Zr-site substituted Li7La3(Zr2-xMx)O12 (M = Ta, Nb) solid electrolytes [J].
Huang, Mian ;
Shoji, Mao ;
Shen, Yang ;
Nan, Ce-Wen ;
Munakata, Hirokazu ;
Kanamura, Kiyoshi .
JOURNAL OF POWER SOURCES, 2014, 261 :206-211
[25]   Effect of Si, In and Ge doping on high ionic conductivity of Li7La3Zr2O12 [J].
Huang, Mian ;
Dumon, Alexandre ;
Nan, Ce-Wen .
ELECTROCHEMISTRY COMMUNICATIONS, 2012, 21 :62-64
[26]   None-Mother-Powder Method to Prepare Dense Li-Garnet Solid Electrolytes with High Critical Current Density [J].
Huang, Xiao ;
Lu, Yang ;
Guo, Haojie ;
Song, Zhen ;
Xiu, Tongping ;
Badding, Michael E. ;
Wen, Zhaoyin .
ACS APPLIED ENERGY MATERIALS, 2018, 1 (10) :5355-5365
[27]   Two-step sintering strategy to prepare dense Li-Garnet electrolyte ceramics with high Li+ conductivity [J].
Huang, Xiao ;
Xiu, Tongping ;
Badding, Michael E. ;
Wen, Zhaoyin .
CERAMICS INTERNATIONAL, 2018, 44 (05) :5660-5667
[28]   High performance of Mn-Co-Ni-O spinel nanofilms sputtered from acetate precursors [J].
Huang, Zhiming ;
Zhou, Wei ;
Ouyang, Cheng ;
Wu, Jing ;
Zhang, Fei ;
Huang, Jingguo ;
Gao, Yanqing ;
Chu, Junhao .
SCIENTIFIC REPORTS, 2015, 5
[29]   Garnet-type Li6.75La3Zr1.75Nb0.25O12 synthesized by coprecipitation method and its lithium ion conductivity [J].
Imagawa, Haruo ;
Ohta, Shingo ;
Kihira, Yuki ;
Asaoka, Takahiko .
SOLID STATE IONICS, 2014, 262 :609-612
[30]   Investigation of Mg2+, Sc3+ and Zn2+ doping effects on densification and ionic conductivity of low-temperature sintered Li7La3Zr2O12 garnets [J].
Jiang, Yue ;
Zhu, Xiaohong ;
Qin, Shiying ;
Ling, Ming'en ;
Zhu, Jiliang .
SOLID STATE IONICS, 2017, 300 :73-77
123456789