	US 11,756,745 B2
	Wide temperature range ultracapacitor
Nicolò Michele Brambilla, Boston, MA (US); and Fabrizio Martini, Boston, MA (US)
Assigned to FASTCAP SYSTEMS CORPORATION, Boston, MA (US)
Filed by FastCAP Systems Corporation, Boston, MA (US)
Filed on Sep. 17, 2021, as Appl. No. 17/478,182.
Application 17/478,182 is a continuation in part of application No. 15/660,950, filed on Jul. 26, 2017, granted, now 11,127,537.
Application 15/660,950 is a continuation of application No. PCT/US2016/015237, filed on Jan. 27, 2016.
Claims priority of provisional application 62/269,077, filed on Dec. 17, 2015.
Claims priority of provisional application 62/269,063, filed on Dec. 17, 2015.
Claims priority of provisional application 62/108,494, filed on Jan. 27, 2015.
Claims priority of provisional application 62/108,162, filed on Jan. 27, 2015.
Prior Publication US 2022/0254575 A1, Aug. 11, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H01G 11/04 (2013.01); H01G 9/028 (2006.01); H01G 9/15 (2006.01); H01G 11/56 (2013.01); H01G 11/62 (2013.01); H01G 11/64 (2013.01)

CPC H01G 11/04 (2013.01) [H01G 9/028 (2013.01); H01G 9/15 (2013.01); H01G 11/56 (2013.01); H01G 11/62 (2013.01); H01G 11/64 (2013.01); Y02E 60/13 (2013.01)]

17 Claims

1. A solid state electrolyte for use in an ultracapacitor comprising:

a polymer matrix doped with an ionic liquid and two solvents-a first solvent and a second solvent; where the second solvent has a melting point lower than the first solvent; where the first solvent has a dielectric constant at 25° C. greater than about 2;

an additive; and

wherein an ultracapacitor that utilizes the electrolyte is configured to output electrical energy at temperatures throughout an operating temperature range.