Characterization of Three-Dimensional Single-Crystalline Porous InP Anodes for Li-Ion Batteries

Abstract

This paper reports on the electrochemical and photo-(electro)chemical fabrication of a single-crystalline porous InP anode for Li-ion batteries. Additionally, a structural characterization by SEM and XRD as well as a battery characterization by cyclovoltammetry and battery cycling tests in half-cells are presented. This anode exhibits a high capacity per area (~63 mAh/cm2). It consists only of the active material (InP) and a thin Au layer as current collector. The maximum possible capacity of InP (~800 mAh/g) is achieved, which is much higher than the capacity of commercial graphite anodes (~350 mAh/g). The total anode capacity is freely scalable by adjusting the InP membrane thickness.