Impedance Analyzer to Measure Conductivity of Solid State Electrolytes and Mixed Conductors

我们需要一个阻抗/增益-相位频率响应分析仪，以便进行交流-具有混合电子/离子导电性的材料的阻抗研究。这种测量对于分离电导率的两个分量的贡献，特别是测量超离子导体的离子电导率是至关重要的。 这些研究适用于我们针对这些特性制造的大部分材料，即用于储能电池的混合锂离子/电子传导。该基础设施对于确定我们用于储能和转换电池的电极材料中的晶界阻抗与体阻抗也至关重要。到目前为止，我们只能使用Biologic VMP-3仪器套件中的阻抗数据（专用恒流仪/恒电位仪，其中嵌入了四个窄频率阻抗通道）来提供关于我们电池中阻抗的一般信息，但是随着我们向前发展-使用新材料，新系统和更多具有广泛离子电导率特性的样品-额外的频率范围，需要独立阻抗分析仪的能力、分辨率和准确度来测量特定材料的离子传导特性（而不是简单地测量整个电池组件的阻抗）。 该设备对于Nazar集团的固态“超离子”导体和固态电池新项目（由NSERC和巴斯夫资助）尤为必要。如果没有功能强大、功能齐全的阻抗分析仪，就无法确定固态离子传导特性，因此将浪费材料的努力。 Pope和Tang实验室将使用阻抗分析仪来精确测量石墨烯基超级电容和赝电容材料的电导率，这些材料具有混合的离子和电子电导率。 在U Waterloo没有功能阻抗分析仪。这些设备将每天使用，每天7小时，因此无法使用园区以外的设备。 要求为Solartron 1260 A分析仪提供资金，这是世界各地用于此类研究的黄金标准阻抗分析仪。

An impedance/gain-phase frequency response analyzer is requested to enable us to carry out a.c.-impedance studies of materials that possess mixed electronic/ionic conductivity. Such measurements are critical to separate the contributions from the two components of the conductivity, and in particular to measure the ion conductivity of superionic conductors. These studies apply to the bulk of the materials which we make that target these properties namely, mixed Li-ion/electronic conduction for energy storage cells. The infrastructure is also vital for the determination of grain boundary impedance vs bulk impedance in our electrode materials for energy storage and conversion cells. Up to now, we have made do with impedance data from our Biologic VMP-3 suite of instruments (dedicated galvanostat/potentiostats which have a four narrow-frequency impedance channels embedded in them) to provide general information on impedance in our batteries, but as we move forward - with new materials, new systems, and many more samples with a wide range of ion conductivity properties - the additional frequency range, capability, resolution and accuracy of a stand-alone impedance analyzer is required to measure the ion conduction properties of specific materials (rather than simply impedance of entire battery assemblies). The equipment is especially necessary for the Nazar group's new project on solid state "superionic" conductors and solid state batteries (funding from NSERC and BASF). Without a powerful, full-fledged impedance analyzer, solid state ion conduction properties simply cannot be determined, and thus the materials effort would be wasted. The Pope and Tang labs will use the impedance analyzer to enable accurate measurements of conductivity in graphene-based supercapacitive and pseudo-capacitive materials which possess mixed ionic and electronic conductivity. There are NO functioning impedance analyzers at U Waterloo. This is equipment that would be used on a daily basis, 7 hours a day, and therefore access to equipment external to campus would not be viable. Funds for a Solartron 1260A analyzer are requested, which is the gold-standard impedance analyzer used around the world for such studies.