A strategy to increase the specific energy and power of electrochemical double-layer capacitors (EDLCs) is the use of ionic liquid electrolytes (ILs) in asymmetric double-layer carbon supercapacitors (AEDLCs) which allow to reach maximum cell voltages as high as 3.7 V with high cycle stability over several thousand cycles. Here, we report the energy and power performance of AEDLCs featuring pyrrolidinium–based ILs evaluated by conventional galvanostatic cycling and by the USABC and DOE FreedomCAR benchmark protocols. The most outstanding finding is that the IL-based supercapacitors meet the dynamic power and energy capability targets stated by DOE for power-assist HEVs.
PYR1(2O1)TFSI -based asymmetric double-layer supercapacitor for HEV application
ARBIZZANI, CATIA;SOAVI, FRANCESCA;MASTRAGOSTINO, MARINA
2009
Abstract
A strategy to increase the specific energy and power of electrochemical double-layer capacitors (EDLCs) is the use of ionic liquid electrolytes (ILs) in asymmetric double-layer carbon supercapacitors (AEDLCs) which allow to reach maximum cell voltages as high as 3.7 V with high cycle stability over several thousand cycles. Here, we report the energy and power performance of AEDLCs featuring pyrrolidinium–based ILs evaluated by conventional galvanostatic cycling and by the USABC and DOE FreedomCAR benchmark protocols. The most outstanding finding is that the IL-based supercapacitors meet the dynamic power and energy capability targets stated by DOE for power-assist HEVs.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
