Ion transfer at interfaces between silver ion conductive solids

银离子导电固体之间界面的离子转移

• 批准号: 10450323
• 负责人: ZEMPACHI Ogumi
• 金额: $ 8万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10450323/
• 关键词: interface; silver ion conductor; ionic transfer; impedance; copper ion conductor

Ion transfer in addition to electron transfer at interfaces between electrode and electrolyte plays an important role for sensors, batteries, and so on. Electron transfer at interfaces between two different solid has been well-investigated, for typical examples of pn junctions of semi-conductors. Ion transfer has been also well-studied for liquid-liquid interfaces. However, in the case of interfaces between two different solids, there have been few studies on ion transfer at the interfaces. In this work, impedance for the ionic transfer at interfaces has been focused, and ionic transfer between silver ion conductive solids was investigated. Following are the summary of this work.1) Silver ion transfer between α-AgI and AgCFィイD23ィエD2SOィイD23ィエD2 dispersed polyethylene oxide(AgCFィイD23ィエD2SOィイD23ィエD2-PEO)was studied by chronoamperometry. Resistance for the silver ion transfer from α-AgI to AgCFィイD23ィエD2SOィイD23ィエD2 was found to be larger than that for the transfer from AgCFィイD23ィエD2SOィイD23ィエD2-PEO to α-AgI.2) Relaxation of open circuit voltage was measured for the cells of Ag/α-AgI/AgCFィイD23ィエD2SOィイD23ィエD2/Ag. Relaxation time was faster when silver ion transfers at interfaces from AgCFィイD23ィエD2SOィイD23ィエD2-PEO to α-AgI, which is in good agreement with the results of chronoamperometry.

除了电极和电解液界面上的电子转移外，离子转移在传感器、电池等方面也起着重要的作用。对于半导体pn结的典型例子，我们已经很好地研究了两种不同固体之间界面上的电子转移。液-液界面上的离子转移也得到了很好的研究。然而，在两种不同固体之间的界面情况下，关于界面上的离子转移的研究很少。在这项工作中，重点研究了界面离子转移的阻抗，并研究了银离子导电固体之间的离子转移。1)用计时电流法研究了银离子在α-AgI和AgCFィイD23ィエD2SOィイD23ィエD2分散聚氧乙烯(AgCFィイD23ィエD2SOィイD23ィエD2-PEO)之间的转移。银离子从α-AgI转移到AgCFィイD23ィエD2SOィイD23ィエD2的阻力大于从AgCFィイD23ィエD2SOィイD23ィエD2-PEO转移到α-AgI的阻力。2)测量了Ag/α-AgI/AgCFィイD23ィエD2SOィイD23ィエD2/Ag电池的开路电压松弛。当银离子从AgCFィイD23ィエD2SOィイD23ィエD2-PEO向α-AgI界面转移时，弛豫时间较快，这与计时电流法的结果是一致的。