As a legacy left behind by classical analytical electrochemistry in pursuit of ideal electrodics, and classical physical electrochemistry in pursuit of the most conductive ionics, the study of non-aqueous electrolytes has been historically confined within a narrow concentration regime around 1 molarity (M). This confinement was breached in recent years when unusual properties were found to arise from the excessive salt presence, which often bring benefits to electrochemical, thermal, transport, interfacial, and interphasial properties that are of significant interest to the electrochemical energy storage community. This article provides an overview on this newly discovered and under-explored realm, with emphasis placed on their applications in rechargeable batteries.

传统分析电化学追求理想的电极，经典物理电化学追求最导电的离子，这是传统留下的遗产，对非水电解质的研究一直局限于1摩尔（M）左右的窄浓度范围内。近年来，当发现过量的盐分会产生异常的性质时，这种限制就被打破了。盐分的过量存在常常给电化学，能量，运输，界面和相间性质带来好处，这是电化学储能领域非常感兴趣的。本文概述了这一新发现和未开发的领域，重点介绍了它们在可充电电池中的应用。