Stable bromine charge storage in porous carbon electrodes using tetraalkylammonium bromides for reversible solid complexation

US10770699B2 · kind B2 · utility

Assignees

• The Regents of the University of California · US
• Oregon State University · US
• UNIVERSITY OF OREGON · US

Inventors

• Galen D. Stucky · Goleta, US
• Brian Evanko · Goleta, US
• Seung-Joon Yoo · Goleta, US
• Jason Lipton · San Rafael, US
• Shannon W. Boettcher · Eugene, US
• David Xiulei Ji · Happy Valley, US
• Xingfeng Wang · Corvallis, US

Key dates

• Filing date: May 22, 2017
• Grant date: Sep 8, 2020
• Expiry date: Jul 9, 2038

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E60/13
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

Electrolytes for use in electric double-layer capacitors (EDLCs; often referred as supercapacitors or ultracapacitors) are disclosed. In one example, the electrolyte comprises viologen in both the anolyte and the catholyte (with bromide). In another example, the electrolyte comprises viologen (in the anolyte) and tetraalkylammonium with bromide (in the catholyte), wherein the tetraalkylammonium is used to achieve solid complexation of bromine in the activated carbon of the cathode. In a third example, a zinc bromine/tetraalkylammonium supercapacitor/battery hybrid is disclosed. Also disclosed is a corrosion resistant bipolar pouch cell that can be used with the electrolyte embodiments described herein.