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Title: Lithium sulfur batteries and electrolytes and sulfur cathodes thereof

Lithium sulfur battery cells that use water as an electrolyte solvent provide significant cost reductions. Electrolytes for the battery cells may include water solvent for maintaining electroactive sulfur species in solution during cell discharge and a sufficient amount of a cycle life-enhancing compound that facilitates charging at the cathode. The combination of these two components enhances one or more of the following cell attributes: energy density, power density and cycle life. For instance, in applications where cost per Watt-Hour (Wh) is paramount, such as grid storage and traction applications, the use of an aqueous electrolyte in combination with inexpensive sulfur as the cathode active material can be a key enabler for the utility and automotive industries, for example, providing a cost effective and compact solution for load leveling, electric vehicles and renewable energy storage. Sulfur cathodes, and methods of fabricating lithium sulfur cells, in particular for loading lithium sulfide into the cathode structures, provide further advantages.
Inventors:
; ; ; ; ; ; ;
Issue Date:
OSTI Identifier:
1358224
Assignee:
POLYPLUS BATTERY COMPANY ARPA-E
Patent Number(s):
9,660,265
Application Number:
14/657,695
Contract Number:
AR0000349
Resource Relation:
Patent File Date: 2015 Mar 13
Research Org:
POLYPLUS BATTERY COMPANY, Berkeley, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE

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