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The Korean Society For New And Renewable Energy
[ Article ]
New & Renewable Energy - , pp.1-11
ISSN: 1738-3935 (Print) 2713-9999 (Online)
Online publication date 19 Apr 2024
Received 15 Feb 2024 Revised 18 Mar 2024 Accepted 20 Mar 2023
DOI: https://doi.org/10.7849/ksnre.2024.0003

하소 온도가 전고체 전지 전해질의 이온전도도에 미치는 영향

홍유택1) ; 임지민1) ; 백기상1) ; 김찬규1) ; 백승욱2) ; 김정현3), *
Effect of Calcination Temperature on Ionic Conductivity of All-solid State Battery Electrolytes
Yu Taek Hong1) ; Ji Min Im1) ; Ki Sang Baek1) ; Chan Gyu Kim1) ; Seung Wook Baek2) ; Jung Hyun Kim3), *
1)Master, Department of Advanced materials Science and Engineering, Hanbat National University
2)Ph.D, Interdisciplinary Materials Measurement Institue, Korea Research Institute of Standards and Science (KRISS)
3)Professor, Department of Advanced materials Science and Engineering, Hanbat National University

Correspondence to: * jhkim2011@hanbat.ac.kr Tel: +82-42-821-1239 Fax: +82-42-821-1592

© 2024 by the New & Renewable Energy
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

In this study, the electrochemical properties of garnet-structured all-solid-state battery electrolytes (Li6.4La3Zr1.4Ta0.6O12, hereafter LLZTO) were assessed by altering the calcination temperature, while maintaining a consistent sintering duration. Among the various heat treatment conditions employed for sample fabrication, the ‘700_1100’ condition, denoting a calcination temperature of 700°C and a sintering temperature of 1100°C, resulted in the most exceptional ionic conductivity of 4.89 × 10-4 S/cm and a relative density of 88.72% for the LLZTO material. This is attributed to the low calcination temperature of 700°C, leading to reduced grain size and enhanced cohesiveness, thus resulting in a higher sintered density. In addition, a microstructure similar to the typical sintering characteristics observed in Spark Plasma Sintering (SPS) methods was identified in the SEM analysis results under the ‘700_1100’ condition. Consequently, the ‘700_1100’ heat treatment condition was deemed to optimal choice for enhancing ionic conductivity.

Keywords:

LLZTO(Li6.4La3Zr1.4Ta0.6O12), Calcination temperature, Sintering temperature, Particle size, Ionic conductivity

키워드:

하소 온도, 소결 온도, 입자 크기, 이온전도도