Data for Design optimisation of supercapacitor-based energy storage systems for high peak power applications

Cell modelling and experimental testing were used to evaluate candidate cells under realistic application-specific cycling conditions. Results revealed significant deviations from rated specifications when subject to the harsh conditions of the target aerospace application, particularly under low temperatures.

A multi-objective optimisation, incorporating energy density, thermal stability, and ESS system weight, initially identified one low-rated cell as the most promising option. However, subsequent cycle-ageing tests showed that this cell type did not sustain capacity over the required lifetime, whereas two other electric double-layer capacitor models were able to meet the 100,000-cycle threshold with variability between units.