An etched nanoporous Ge anode in a novel metal-air energy conversion cellElectronic supplementary information (ESI) available: Theoretical electrochemical equivalent of selected metal-air materials, SEM images of highly electropolished PGe, other porous Ge structures formed under different etching conditions, X-ray diffractograms of pristine and etched Ge wafers, SEM images of post-discharge PGe, and X-ray diffractograms of the air electrode before and after discharge. See DOI: 10.1039/c3cp50885

• Main Authors: Ocon, Joey D, Kim, Jin Won, Uhm, Sunghyun, Mun, Bongjin Simon, Lee, Jaeyoung
• Format: Journal Article
• Language: English
• Published: 03.04.2013
• ISSN: 1463-9076; 1463-9084
• DOI: 10.1039/c3cp50885d

We first report the successful synthesis of porous germanium with ordered hierarchical structures, via controlled etching, and show its performance as an anode in a new metal-air battery. Our experimental results demonstrate the potential use of porous germanium in a high power density Ge-air energy conversion cell, showing a stable long-term discharge profile at various current drains. A nanoporous germanium anode shows a stable long-term discharge profile and fast voltage dynamics at high current drains in a new Ge-air battery.