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Accelerated Life Testing of Double‐Layer Capacitors: Reliability and Safety under Excess Voltage and Temperature
Ist Teil von
ChemElectroChem, 2015-01, Vol.2 (1), p.150-159
Ort / Verlag
Weinheim: WILEY‐VCH Verlag
Erscheinungsjahr
2015
Link zum Volltext
Quelle
Wiley-Blackwell Journals
Beschreibungen/Notizen
Commercial 50 F double‐layer capacitors from leading international manufactures were tested with respect to fire protection regulations and general safety hazards in technical pulse–power applications at temperatures of up to 120 °C and voltages up to 4 V. Diagnostic criteria were gathered during a decade of lifetime testing concerning the destruction of the electrode materials and the evaporation of electrolyte. The aging behavior of supercapacitors is quantified on the basis of capacitance loss, parasitic side reactions, and the chemical analysis of decomposition products. Amines, amides, and oligomers of acetonitrile are formed in the electrolyte. The carbon composite electrodes are destroyed by continual stress at high temperatures and operating voltages.
Life in the fast lane: Commercial 50 F double‐layer capacitors are tested with respect to fire protection and safety hazards in pulse–power applications at temperatures of up to 120 °C and voltages up to 4 V. Novel diagnostic criteria allow the evaluation of the destruction of the electrode materials, the evaporation of electrolyte, parasitic side reactions, internal pressure, and the formation of decomposition products within the capacitor.