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Multi-cell ultracapacitor

  • US 10,446,328 B2
  • Filed: 05/18/2017
  • Issued: 10/15/2019
  • Est. Priority Date: 05/20/2016
  • Status: Active Grant
First Claim
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1. An ultracapacitor comprising:

  • a first electrochemical cell that is defined by a first electrode that contains a current collector having opposing sides coated with a carbonaceous material, a second electrode that contains a current collector having opposing sides coated with a carbonaceous material, and a separator positioned between the first electrode and the second electrode;

    a second electrochemical cell that is connected in parallel with the first cell, wherein the second cell is defined by the second electrode, a third electrode that contains a current collector having opposing sides coated with a carbonaceous material, and a separator positioned between the second electrode and the third electrode;

    a nonaqueous electrolyte that is in ionic contact with the first electrode, second electrode, and third electrodes, wherein the nonaqueous electrolyte contains nonaqueous solvent and an ionic liquid; and

    a package that encloses the first electrochemical cell, the second electrochemical cell, and the nonaqueous electrolyte, wherein the package contains a substrate having a thickness of from about 20 micrometers to about 1,000 micrometers.

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