Low-gassing carbon materials for improving performance of lead acid batteries
AssigneeEnerG2 Technologies, Inc.
InventorsSarah Fredrick, Avery J. Sakshaug, Benjamin E. Kron, Dion Hubble, Henry R. Costantino, Aaron M. Feaver, Leah A. Thompkins, Virginia Katherine Alspaugh, Phil Hamilton, Katharine Geramita, Cory Mekelburg, Frank Reuter, Jacob Ebenstein Grose, Rebekka Von Benten
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Abstract
Carbon materials having low gassing properties and electrodes and electrical energy storage devices, especially lead-acid batteries, comprising the same are provided.
Claims83
A carbon material comprising less than an absolute value of 10 mA/mg current at −1.6 V vs Hg/Hg2SO4 when tested by cyclic voltammetry as a working electrode on a substrate comprising lead and employing a platinum counter electrode in the presence of electrolyte comprising sulfuric acid.
A carbon material producing less than 100 (mA/mg)/(V) at −1.55 V vs Hg/Hg2SO4 when tested by cyclic voltammetry as a working electrode on a substrate comprising lead and employing a platinum counter electrode in the presence of electrolyte comprising sulfuric acid.
A carbon material producing less than 200 (mA/mg)2/(V) at −1.52 V vs Hg/Hg2SO4 when tested by cyclic voltammetry as a working electrode on a substrate comprising lead and employing a platinum counter electrode in the presence of electrolyte comprising sulfuric acid.
A carbon material producing less than 5:1 (mA/mg current at −1.6 V vs Hg/Hg2SO4):
- (mA/mg current at 1.2 V vs Hg/Hg2SO4) when tested by cyclic voltammetry as a working electrode on a substrate comprising lead and employing a platinum counter electrode in the presence of electrolyte comprising sulfuric acid.
A carbon material producing between 0.75:1 to 1.25:1 (mA/mg current at −1.4 V vs Hg/Hg2SO4):
- (mA/mg current at 1.2 V vs Hg/Hg2SO4) when tested by cyclic voltammetry as a working electrode on a substrate comprising lead and employing a platinum counter electrode in the presence of electrolyte comprising sulfuric acid.
A carbon material comprising at least 15% nitrogen by weight and a BET specific surface area of at least 300 m2/g.
Dependencies are inferred from the claim text.