University of California

Oregon State University

University of Oregon

Brian Evanko

Galen D Stucky

Shannon W Boettcher

Xingfeng Wang

Xiulei Ji

Jason Lipton

Nicholas Parker

David Vonlanthen

David Auston

David Xiulei Ji

Sang-Eun Chun

Seung Joon Yoo

Bao Wang

Raghu Subash Chandrabose

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.

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

An electrical double layer capacitor (EDLC) energy storage device is provided that includes at least two electrodes and a redox-enhanced electrolyte including two redox couples such that there is a different one of the redox couples for each of the electrodes. When charged, the charge is stored in Faradaic reactions with the at least two redox couples in the electrolyte and in a double-layer capacitance of a porous carbon material that comprises at least one of the electrodes, and a self-discharge of the energy storage device is mitigated by at least one of electrostatic attraction, adsorption, physisorption, and chemisorption of a redox couple onto the porous carbon material.

Energy storage device including a redox-enhanced electrolyte

Growing community of inventors

Goleta, CA, United States of America

Brian Evanko