Electrolyte compositions for batteries using sulphur or sulphur compounds

a technology of electrolyte composition and sulphur compound, which is applied in the direction of electrochemical generators, non-aqueous electrolyte accumulator electrodes, non-aqueous electrolyte accumulator electrodes, etc., to achieve the effect of increasing the cycle life of the battery, increasing the cycling efficiency and temperature stability
US20060177741A1Inactive Publication Date: 2006-08-10OXIS ENERGY
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
OXIS ENERGY
Publication Date
2006-08-10
Estimated Expiration
Not applicable · inactive patent

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Abstract

There are disclosed electrolytes comprising solutions of lithium salts with large anions in polar aprotic solvents with a particular concentration of background salts. The concentration of the background salts is selected to be equal or close to the concentration of a saturated solution of these salts in the aprotic solvents used. The electrolytes disclosed can be used in chemical sources of electric energy such as secondary (rechargeable) cells and batteries comprising sulphur-based positive active materials. The use of such electrolytes increases cycling efficiency and cycle life of the cells and batteries.
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Description

PRIOR APPLICATION DATA

[0001] This application claims benefit from prior U.S. provisional application Ser. No. 60 / 652,769, filed Feb. 15, 2005, entitled “ELECTROLYTE COMPOSITIONS FOR BATTERIES USING SULPHUR OR SULPHUR COMPOUNDS”, and claims benefit from prior UK patent application number 0501001.2 filed on 18th Jan. 2005, both of which being incorporated herein by reference in their entirety.FIELD OF THE INVENTION

[0002] The present invention relates to electrolyte compositions for chemical sources of electric energy comprising positive electrodes (cathodes) and negative electrodes (anodes). In particular, embodiments of the invention relate to rechargeable (secondary) battery cells comprising a negative electrode (made of lithium, sodium or another active material or composition) providing ions (anode), an intermediate separator element containing a liquid or gel electrolyte solution through which ions from a source electrode material move between cell electrodes during charge and ...

Claims

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