Investigation of charge-exchange processes in mixed conducting oxides for quantitative low-energy ion scattering (LEIS) analysis

研究混合导电氧化物中的电荷交换过程以进行定量低能离子散射 (LEIS) 分析

• 批准号: 16K17921
• 负责人: Tellez Helena
• 金额: $ 2.75万
• 依托单位: Kyushu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2016
• 资助国家: 日本
• 起止时间: 2016-04-01 至 2017-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-16K17921/
• 关键词: Quantification; Surface analysis; LEIS; Electrodes; Sensitivity factors; Charge-exchange; Energy conversion; Transition metals; Solid oxide fuels cells; SOECs

During the first months of the project the main focus was made on the development of the LEIS analysis methodology for the quantitative analysis of materials used for electrochemical energy conversion devices.In this sense, the project covered the two work-packages described for the year 2016:1.Determination of the sensitivity factors for the cations of interest: The characteristic velocity method was applied on powdered standard materials for the estimation of the survival probability and sensitivity factors of the cations of interest in selected perovskite materials (e.g. Strontium, Lanthanum, Cobalt and Nickel). This methodology also provides information about the charge-exchange processes during the primary ion-atom surface interaction. The primary species studied were 4He+ and 20Ne+.2.Validation of the LEIS analyses on electrode materials. The neutralization behaviour of the primary projectile for the analysis of two state-of-the-art electrode materials (i.e. La0.6Sr0.4Co0.2Fe0.8O3- and La2NiO4+ was evaluated as a function of the energy to identify the presence of matrix effects.

在项目的前几个月，主要重点是开发用于电化学能量转换装置材料定量分析的LEIS分析方法。从这个意义上说，该项目涵盖了2016年的两个工作包：1.确定感兴趣阳离子的灵敏度因子：应用特征速度法对粉末标准物质进行了测试，以估算钙钛矿材料中感兴趣的阳离子的存活概率和灵敏度因子（例如锶、镧、钴和镍）。这种方法也提供了有关的电荷交换过程中的主要离子-原子表面相互作用的信息。研究的主要物种为~ 4 He ~+和~（20）Ne ~+。2.电极材料LEIS分析的验证。作为能量的函数，评估了用于分析两种最先进的电极材料（即La0.6Sr0.4Co0.2Fe0.8O3-和La 2NiO 4+）的主要射弹的中和行为，以确定基质效应的存在。

项目成果

Structural and Transport Properties of the BLC-PBCO System; Effects of Cation ordering

BLC-PBCO 系统的结构和传输特性；

• 发表时间: 2016
• 作者: J. Druce;T. Wang;H. Tellez;J.A. Kilner;T. Ishihara
• 通讯作者: T. Ishihara

La2NiO4+δ single crystals: anisotropic oxygen diffusion and surface chemistry dependence of the oxygen exchange reaction

La2NiO4+δ单晶：各向异性氧扩散和氧交换反应的表面化学依赖性

• 发表时间: 2016
• 作者: H. Tellez;M. Burriel;R. J. Chater;R. Castaing;P. Veber;T. Ishihara;J. Druce;J.A. Kilnera;J.M. Bassat
• 通讯作者: J.M. Bassat

Effects of Microstructure on Surface Segregation: Role of Grain Boundaries

微观结构对表面偏析的影响：晶界的作用

• 发表时间: 2016
• 作者: Helena Tellez;John Druce;Tatsumi Ishihara;John Kilner
• 通讯作者: John Kilner

Surface Composition and Oxygen Exchange Properties of Alkaline Earth-Free Perovskites

无碱土钙钛矿的表面组成和氧交换性能

• 发表时间: 2016
• 作者: J. Druce;T. Wang;H. Tellez;J.A. Kilner;T. Ishihara
• 通讯作者: T. Ishihara

Surface Reactivity and Ionic Transport of Mixed Conductors in Wet Atmospheres

潮湿大气中混合导体的表面反应性和离子传输

• 发表时间: 2016
• 作者: Helena Tellez;John Druce;Tatsumi Ishihara;John Kilner
• 通讯作者: John Kilner