Martinez Joseph, Ashby David, Zhu Cheng, Dunn Bruce, Baker Lane A, Siwy Zuzanna S
Department of Physics and Astronomy, University of California, Irvine, CA 92697, USA.
Faraday Discuss. 2018 Oct 1;210(0):55-67. doi: 10.1039/c8fd00071a.
We present experimental approaches to probe the ionic conductivity of solid electrolytes at the meso- and nanoscales. Silica ionogel based electrolytes have emerged as an important class of solid electrolytes because they maintain both fluidic and high-conductivity states at the nanoscale, but at the macroscale they are basically solid. Single mesopores in polymer films are shown to serve as templates for cast ionogels. The ionic conductivity of the ionogels was probed by two experimental approaches. In the first approach, the single-pore/ionogel membranes were placed between two chambers of a conductivity cell, in a set-up similar to that used for investigating liquid electrolytes. The second approach involved depositing contacts directly onto the membrane and measuring conductivity without the bulk solution present. Ionic conductivity determined by the two methods was in excellent agreement with macroscopic measurements, which suggested that the electrochemical properties of ionogel based electrolytes are preserved at the mesoscale, and ionogels can be useful in designing meso-scaled energy-storage devices.
我们展示了在介观和纳米尺度上探测固体电解质离子电导率的实验方法。基于二氧化硅离子凝胶的电解质已成为一类重要的固体电解质，因为它们在纳米尺度上保持流体和高导电状态，但在宏观尺度上它们基本上是固体。聚合物薄膜中的单个介孔被证明可作为浇铸离子凝胶的模板。通过两种实验方法探测了离子凝胶的离子电导率。在第一种方法中，将单孔/离子凝胶膜置于电导率池的两个腔室之间，其设置类似于用于研究液体电解质的设置。第二种方法涉及直接在膜上沉积触点并在不存在本体溶液的情况下测量电导率。通过这两种方法测定的离子电导率与宏观测量结果非常吻合，这表明基于离子凝胶的电解质的电化学性质在介观尺度上得以保留，并且离子凝胶可用于设计介观尺度的储能装置。
