International Business Machines Corporation
Evaporated ion conductive layer for decreased interfacial resistance/impedance at silicon based electrode interface

Abstract:

An interfacial additive layer for decreasing the interfacial resistance/impedance of a silicon based electrode-containing device such as, for example, an energy storage device or a micro-resistor, is disclosed. The interfacial additive, which is composed of evaporated lithium fluoride, is formed between a silicon based electrode and a solid polymer electrolyte layer of the device. The evaporated lithium fluoride serves as ion conductive layer. The presence of such an interfacial additive layer increases the ion and electron mobile dependent performances at the silicon based electrode interface due to significant decrease in the resistance/impedance that is observed at the respective interface as well as the impedance observed in the bulk of the device.