MRI: Acquisition of Instrumentation for Ionic Conductivity Studies of Polymeric Electrolytes

在主要研究仪器（MRI）项目的支持下，格林内尔学院化学系将获得一台电化学阻抗仪和一台差示扫描量热计（DSC）。电化学阻抗仪器将使首席研究员和格林内尔大学的本科生能够进行聚合物电解质的离子电导率研究；DSC将有助于测量电解质的热性能。差示扫描量热法是现代分析化学中一种非常有用的工具。量热分析用于测量分子相互作用和反应过程中发生的热能交换。因此，DSC为测定材料的热力学性质（如液体和固体样品的热容量变化）提供了一种非常可靠和灵敏的方法。阻抗谱测量样品的交流电阻，即阻抗，作为频率的函数。热力学性质和阻抗的知识对于理解材料的行为至关重要，例如聚合物电解质，它们在微电子和轻量化小型电池中显示出前景。

With support from the Major Research Instrumentation (MRI) Program, the Department of Chemistry at Grinnell College will acquire an electrochemical impedance instrument and a differential scanning calorimeter (DSC). The electrochemical impedance instrument will enable the principal investigator and undergraduates at Grinnell to carry out ionic conductivity studies of polymeric electrolytes; the DSC will facilitate the measurement of the thermal properties of the electrolytes. Differential Scanning Calorimetry is an extremely useful tool in modern analytical chemistry. Calorimetric analysis is used to measure the thermal energy (heat) exchange that occurs during molecular interactions and reactions. Thus DSC provides a very reliable and sensitive method for determining thermodynamic properties of materials such as changes in heat capacity of liquid and solid samples. Impedance spectroscopy measures the alternating current resistance, i.e., the impedance, of a sample as a function of frequency. Knowledge of thermodynamic properties and impedances is crucial to understanding the behavior of materials, such as polymer electrolytes, that show promise in microelectronics and lightweight, small batteries.