Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/125239
Title: CONTROL OF STRUCTURE AND FUNCTIONAL PROPERTIES OF GA:M5+-CODOPED LITHIUM LANTHANUM ZIRCONATE (LI7LA3ZR2O12) (M=Ta, Nb) SOLID ELECTROLYTES BY AN OPTIMIZED PROCESSING PROFILE
Authors: GU WENYI
Keywords: Lithium Lanthanum Zirconate, LLZ, Solid electrolyte, Li-air batteries, Processing profile
Issue Date: 22-Jan-2016
Citation: GU WENYI (2016-01-22). CONTROL OF STRUCTURE AND FUNCTIONAL PROPERTIES OF GA:M5+-CODOPED LITHIUM LANTHANUM ZIRCONATE (LI7LA3ZR2O12) (M=Ta, Nb) SOLID ELECTROLYTES BY AN OPTIMIZED PROCESSING PROFILE. ScholarBank@NUS Repository.
Abstract: GARNET-TYPE LITHIUM FAST-ION CONDUCTOR LI7LA3ZR2O12 (LLZ) IS A PROMISING CANDIDATE TO FACILITATE THE DESIGN OF HIGH ENERGY BATTERIES DUE TO ITS STABILITY IN CONTACT WITH LITHIUM AND CATHODE MATERIALS AND HIGH LI+-ION YET NEGLIGIBLE ELECTRONIC CONDUCTIVITY. HERE, THE SYNTHESIS OF LLZ WITH PENTAVALENT (TA,NB), TRIVALENT (AL,GA), OR HEXAVALENT (TE) DOPANTS WAS SYSTEMATICALLY INVESTIGATED USING CONVENTIONAL SOLID-STATE REACTIONS OR LOW-TEMPERATURE SOL-GEL PROCESSES. EFFECTS OF DOPANTS ON STABILISATION OF THE FAST-ION CONDUCTING CUBIC PHASE, STRUCTURAL DETAILS, LI+-ION ORDERING AND CONDUCTIVITY AND THEIR CORRELATION WERE STUDIED SYSTEMATICALLY BY X-RAY OR NEUTRON DIFFRACTION, IMPEDANCE SPECTROSCOPY AND MOLECULAR DYNAMICS SIMULATIONS. FORMATION AND DECOMPOSITION MECHANISMS AND THE INFLUENCE OF CO2 THEREON WERE STUDIED. THE INCORPORATION OF GA2O3 AS A SINTERING AGENT RESULTED IN GA:TA5+/NB5+-CODOPED LLZ WITH ~10% INCREASED DENSITY AND HENCE AN ENHANCED LI+ ION CONDUCTIVITY. ITS APPLICATION AS
URI: http://scholarbank.nus.edu.sg/handle/10635/125239
Appears in Collections:Ph.D Theses (Open)

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