This paper reports on the electrochemical and photo-(electro)chemical fabrication of a single-crystalline porous InP anode, and its performance in Li-ion batteries. This anode exhibits high capacity per area (similar to 63 mAh/cm(2)). It consists only of the active material (InP) and a thin Au layer as a current collector. The maximum possible capacity of InP (similar to 800 mAh/g) is achieved, which is much higher than the capacity of commercial graphite anodes (similar to 350 mAh/g). The total anode capacity is freely scalable by adjusting the InP membrane thickness. The paper also shows the fabrication processes and a thorough battery characterization by cyclovoltammetry and battery cycling tests in half-cells. (C) 2012 The Electrochemical Society. [DOI: 10.1149/2.037212jes] All rights reserved.