Performance investigations of Pb2Ru2O6.5 oxide based pseudocapacitors

Lead Pb/Ru pyrochlore (Pb2Ru2O6.5) was synthesized as a new electrode mater ial for aqueous-electrolyte capacitors. This material was characterized usi ng X-ray diffraction, BET area anhgalysis and cyclic voltammetry. Small lab oratory-scale prototype capacitors were fabricated with Pb2Ru2O6.5 oxide el ectrodes and tested for their electrochemical performance in terms of capac itance, rate-capabilities, and energy-power performance. These laboratory c ells exhibited excellent performance under constant power discharge deliver ing >5 W h/kg specific energy at 750 W/kg power level based on electrode an d electrolyte masses only. (C) 2001 Elsevier Science B.V. All rights reserv ed.