The electrochemical performance of an all-solid-state lithium-oxygen battery was examined using a platinum patterned electrode with a lithium conducting solid electrolyte under a humidified O2 atmosphere. The cell consisted of a lithium metal anode, a protective layer of polyethylene oxide with Li(CF3SO2)2N, a lithium-conducting solid electrolyte of Li1 + x + yAlx(Ge,Ti)2 - xSiyP3 - yO12, and a sputtered platinum stripe-patterned air electrode. The open circuit voltage (OCV) of the virgin cell was 3.5 V under humidified O2 and decreased to 3.2 V after slight discharge, which is comparable with that under dry O2 (2.4 V). The cell was successfully discharged and charged at 0.1 mA cm- 2 and 60 °C. A reaction product was observed on the platinum electrode; however, it could not be identified by X-ray diffraction analysis or Raman spectroscopy, which indicated it was amorphous. Nano-secondary ion mass spectrometry (SIMS) analysis suggested that the reaction product contains Li, H, and O.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics