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1. WO1999008299 - NONAQUEOUS ELECTROLYTE FOR ELECTRICAL STORAGE DEVICES

Publication Number WO/1999/008299
Publication Date 18.02.1999
International Application No. PCT/US1998/016625
International Filing Date 10.08.1998
Chapter 2 Demand Filed 11.03.1999
IPC
H01G 9/02 2006.1
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
GCAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
9Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
004Details
02Diaphragms; Separators
H01M 6/14 2006.1
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
6Primary cells; Manufacture thereof
14Cells with non-aqueous electrolyte
H01M 6/16 2006.1
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
6Primary cells; Manufacture thereof
14Cells with non-aqueous electrolyte
16with organic electrolyte
CPC
H01G 9/022
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
GCAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
9Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
004Details
022Electrolytes; Absorbents
H01M 6/14
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
6Primary cells; Manufacture thereof
14Cells with non-aqueous electrolyte
H01M 6/166
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
6Primary cells; Manufacture thereof
14Cells with non-aqueous electrolyte
16with organic electrolyte
162characterised by the electrolyte
166by the solute
H01M 6/168
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
6Primary cells; Manufacture thereof
14Cells with non-aqueous electrolyte
16with organic electrolyte
162characterised by the electrolyte
168by additives
Y02E 60/13
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
60Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
13Energy storage using capacitors
Applicants
  • COVALENT ASSOCIATES, INC. [US]/[US]
Inventors
  • MCEWEN, Alan, B.
  • EIN-ELI, Yair
Agents
  • HEINE, Holliday, C.
Priority Data
08/910,14312.08.1997US
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) NONAQUEOUS ELECTROLYTE FOR ELECTRICAL STORAGE DEVICES
(FR) ELECTROLYTE NON AQUEUX POUR DISPOSITIFS DE STOCKAGE ELECTRIQUE
Abstract
(EN) Improved nonaqueous electrolytes for application in electrical storage devices such as electrochemical capacitors or batteries are disclosed. The electrolytes of the invention contain salts consisting of alkyl substituted, cyclic delocalized aromatic cations, and their perfluoro derivatives, and certain polyatomic anions having a van der Waals volume less than or equal to 100 Å3, preferably inorganic perfluoride anions and most preferably PF6-, the salts being dissolved in organic liquids, and preferably alkyl carbonate solvents, or liquid sulfur dioxide or combinations thereof, at a concentration of greater than 0.5M and preferably greater than 1.0M. Exemplary electrolytes comprise 1-ethyl-3-methylimidazolium hexafluorophosphate dissolved in a cyclic or acyclic alkyl carbonate, or methyl formate, or a combination thereof. These improved electrolytes have useful characteristics such as higher conductivity, higher concentration, higher energy storage capabilities, and higher power characteristics compared to prior art electrolytes. Stacked capacitor cells using electrolytes of the invention permit high energy, high voltage storage.
(FR) L'invention concerne des électrolytes non aqueux améliorés destinés à l'utilisation dans des dispositifs de stockage électriques tels que des condensateurs électrochimiques ou des batteries. Les électrolytes de l'invention renferment des sels comprenant des cations aromatiques délocalisés cycliques, alkyl-substitués, et leurs dérivés perfluorés, ainsi que certains anions polyatomiques ayant un volume de Van der Waals inférieur ou égal à 100 Å3, de préférence des anions perfluorure inorganiques et, idéalement, PF6-, les sels étant dissous dans des liquides organiques, et de préférence dans des solvants à base de d'alkyl-carbonate, ou dans du dioxyde de soufre liquide ou dans leurs mélanges, à des concentrations supérieures à 0,5 M et, de préférence, supérieures à 1,0 M. Les électrolytes pris à titre d'exemple comprennent le 1-éthyl-3-méthylimidazolium hexafluorophosphate dissous dans de l'alkyl-carbonate cyclique ou acyclique, ou du formiate de méthyle ou un de leurs mélanges. Ces électrolytes améliorés présentent des caractéristiques utiles telles qu'une conductivité accrue, une concentration accrue, des capacités de stockage d'énergie accrues et des caractéristiques de puissance supérieures par rapport aux électrolytes actuels. Des éléments de condensateur empilés utilisant des électrolytes de l'invention permettent d'emmagasiner des énergies et des tensions élevées.
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