Oregon State University

University of California

Sharp Laboratories of America, Inc

UChicago Argonne, LLC

University of Oregon

Xiulei Ji

Galen D Stucky

Jong-Jan Lee

Khalil Amine

Yuhao Lu

Sean Vail

Jun Lu

Shannon W Boettcher

Rui Xu

Brian Evanko

Xingfeng Wang

Bao Wang

Sang-Eun Chun

Raghu Subash Chandrabose

Chong Zhang

Wei Luo

Clement Bommier

Nicholas Parker

David Vonlanthen

David Auston

Water-in-salt electrolytes for zinc metal batteries are disclosed. The electrolyte includes a zinc halide. The electrolyte may be a hybrid water-in-salt electrolyte further including an additional metal halide or nonmetal halide. Batteries including the electrolytes are disclosed, as well as devices including the batteries and methods of making the batteries.

Aqueous zinc-metal batteries comprising 'water-in-salt' electrolyte

An electrochemical device includes a cathode containing graphene-wrapped LiS nanoparticles. The graphene-wrapped LiS nanoparticles are prepared by a method including heating lithium metal, and a carbon-sulfur source or a carbon source and a sulfur source in a sealed container at a temperature to produce lithium vapors, and vapors of the carbon-sulfur source or vapors of the carbon source and vapors of the sulfur source; and cooling the sealed container to produce the graphene-wrapped LiS nanoparticles.

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A method is provided for fabricating a graphene-doped, carbohydrate-derived hard carbon (G-HC) composite material for alkali metal-ion batteries. The method provides graphene oxide (GO) dispersed in an aqueous solution. A carbohydrate is dissolved into the aqueous solution and subsequently the water is removed to create a precipitate. In one aspect, the carbohydrate is sucrose. The precipitate is dehydrated and exposed to a thermal treatment of less than 1200 degrees C. to carbonize the carbohydrate. The result is the formation of a graphene-doped, carbohydrate-derived hard carbon (G-HC) composite. Typically, the G-HC composite is made up of graphene in the range of 0.1 and 20% by weight (wt %), and HC in the range of 80 to 99.9 wt %. The G-HC composite has a specific surface area of less than 10 square meters per gram (m/g). A G-HC composite suitable for use in alkali metal-ion batteries electrodes is also provided.

Hard carbon composite for alkali metal-ion batteries

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

An electrical double layer capacitor (EDLC) energy storage device is provided that includes an electrolyte having an anionic catholyte and a cationic anolyte, a positively charged electrode, and a negative charged electrode, where negatively charged oxidized species in the anionic catholyte are electrostatically attracted to the positively charged electrode, where positively charged reduced species in the cationic anolyte are electrostatically attracted to the negatively charged electrode, where self-discharge of the EDLC energy storage device is prevented.

High energy capacitors boosted by both catholyte and anolyte

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Corvallis, OR, United States of America

Xiulei Ji