Increasing ionic conductivity in Li_(0.33)La_(0.56)TiO_(3)thin-films via optimization of processing atmosphere and temperature

作     者：Shi-Pai Song Cheng Yang Chun-Zhi Jiang Yong-Min Wu Rui Guo He Sun Jing-Lei Yang Yong Xiang Xiao-Kun Zhang 

作者机构：School of Materials and EnergyUniversity of Electronic Science and Technology of ChinaChengdu 611731China School of Materials Science and EngineeringHarbin Institute of TechnologyHarbin 150001China State Key Laboratory of Space Power-Sources TechnologyShanghai Institute of Space Power-SourcesShanghai 200245China Department of Mechanical and Aerospace EngineeringHong Kong University of Science and TechnologyHong Kong 999077China Advanced Energy Research InstituteUniversity of Electronic Science and Technology of ChinaChengdu 611731China Sichuan Provincial Engineering Research Center of Flexible Display Material GenomeUniversity of Electronic Science and Technology of ChinaChengdu 611731China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2022年第41卷第1期

页      面：179-188页

核心收录：

学科分类：0808[工学-电气工程] 07[理学] 0806[工学-冶金工程] 08[工学] 070205[理学-凝聚态物理] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：This study was financially supported by the National Natural Science Funds of China(No.21905040) the Startup Funds from the University of Electronic Science and Technology of China,the National Key Research and Development Program of China(Nos.2017YFB0702802 and 2018YFB0905400) Shanghai Venus Project(No.18QB1402600) 

主　　题：Li_(0.33)La_(0.56)TiO_(3) Thin film Ionic conductivity Lithium-ion concentration Oxygen defects 

摘      要：As a promising solid electrolyte for thin-film lithium batteries,the amorphous Li_(0.33)La_(0.56)TiO_(3)(LLTO)thin film has gained great ***,enhancing ionic conductivity remains challenging in the ***,a systematical study was performed to improve the ionic conductivity of sputter-deposited LLTO thin films via the optimization of processing atmosphere and *** combining the optimized oxygen partial pressure(30%),annealing temperature(300℃),and annealing atmosphere(air),an amorphous LLTO thin film with an ionic conductivity of 5.32910^(-5)·S·cm^(-1) at room temperature and activation energy of 0.26 eV was *** results showed that,first,the oxygen partial pressure should be high enough to compensate for the oxygen loss,but low enough to avoid the abusive oxygen scattering effect on lithium precursors that results in a lithium-poor *** oxygen partial pressure needs to achieve a balance between lithium loss and oxygen defects to improve the ionic ***,a proper annealing temperature reduces the oxygen defects of LLTO thin films while maintaining its amorphous state,which improves the ionic ***,the highest ionic conductivity for the LLTO thin films that were annealed in air(a static space without a gas stream)occurs because of the decreased lithium loss and oxygen defects during *** findings show that the lithium-ion concentration and oxygen defects affect the ionic conductivity for amorphous LLTO thin films,which provides insight into the optimization of LLTO thin-film solid electrolytes,and generates new opportunities for their application in thinfilm lithium batteries.