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

页数：11

共 83 条

[1] Structure, Ionic Conductivity, and Dielectric Properties of Li-Rich Garnet-type Li5+2xLa3Ta2-xSmxO12 (0 ≤ x ≤ 0.55) and Their Chemical Stability [J].

Abdel-Basset, Dalia M. ;

Mulmi, Suresh ;

El-Bana, Mohammed S. ;

Fouad, Suzan S. ;

Thangadurai, Venkataraman .

INORGANIC CHEMISTRY, 2017, 56 (15) :8865-8877

[2] Ion transport and phase transition in Li7-xLa3(Zr2-xMx)O12 (M = Ta5+, Nb5+, x=0, 0.25) [J].

Adams, Stefan ;

Rao, Rayavarapu Prasada .

JOURNAL OF MATERIALS CHEMISTRY, 2012, 22 (04) :1426-1434

[3] Effect of substitution (Ta, Al, Ga) on the conductivity of Li7La3Zr2O12 [J].

Allen, J. L. ;

Wolfenstine, J. ;

Rangasamy, E. ;

Sakamoto, J. .

JOURNAL OF POWER SOURCES, 2012, 206 :315-319

[4] Synthesis and structure analysis of tetragonal Li7La3Zr2O12 with the garnet-related type structure [J].

Awaka, Junji ;

Kijima, Norihito ;

Hayakawa, Hiroshi ;

Akimoto, Junji .

JOURNAL OF SOLID STATE CHEMISTRY, 2009, 182 (08) :2046-2052

[5] Evaluation of fundamental transport properties of Li-excess garnet-type Li5+2xLa3Ta2-xYxO12 (x=0.25, 0.5 and 0.75) electrolytes using AC impedance and dielectric spectroscopy [J].

Baral, Ashok Kumar ;

Narayanan, Sumaletha ;

Ramezanipour, Farshid ;

Thangadurai, Venkataraman .

PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2014, 16 (23) :11356-11365

[6]

Barsoukov E, 2005, IMPEDANCE SPECTROSCOPY: THEORY, EXPERIMENT, AND APPLICATIONS, 2ND EDITION, pXII

[7] Grain boundary modification to suppress lithium penetration through garnet-type solid electrolyte [J].

Basappa, Rajendra Hongahally ;

Ito, Tomoko ;

Morimura, Takao ;

Bekarevich, Raman ;

Mitsuishi, Kazutaka ;

Yamada, Hirotoshi .

JOURNAL OF POWER SOURCES, 2017, 363 :145-152

[8] Atmosphere Controlled Processing of Ga-Substituted Garnets for High Li-Ion Conductivity Ceramics [J].

Bernuy-Lopez, Carlos ;

Manalastas, William, Jr. ;

Lopez del Amo, Juan Miguel ;

Aguadero, Ainara ;

Aguesse, Frederic ;

Kilner, John A. .

CHEMISTRY OF MATERIALS, 2014, 26 (12) :3610-3617

[9] Fluorine-free electrolytes for all-solid sodium-ion batteries based on percyano-substituted organic salts [J].

Bitner-Michalska, Anna ;

Nolis, Gene M. ;

Zukowska, Grazyna ;

Zalewska, Aldona ;

Poterala, Marcin ;

Trzeciak, Tomasz ;

Dranka, Maciej ;

Kalita, Michal ;

Jankowski, Piotr ;

Niedzicki, Leszek ;

Zachara, Janusz ;

Marcinek, Marek ;

Wieczorek, Wladyslaw .

SCIENTIFIC REPORTS, 2017, 7

[10] Dual Substitution Strategy to Enhance Li+ Ionic Conductivity in Li7La3Zr2O12 Solid Electrolyte [J].

Buannic, Lucienne ;

Orayech, Brahim ;

Lopez Del Amo, Juan-Miguel ;

Carrasco, Javier ;

Katcho, Nebil A. ;

Aguesse, Frederic ;

Manalastas, William ;

Zhang, Wei ;

Kilner, John ;

Llordes, Anna .

CHEMISTRY OF MATERIALS, 2017, 29 (04) :1769-1778

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