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Electrolyte composition

A composition and solvent composition technology, applied in non-aqueous electrolyte storage batteries, circuits, lithium storage batteries, etc., can solve problems such as excessively high surface energy, inability to self-wet battery parts, and difficulty in volatile solvents.

Inactive Publication Date: 2008-09-03
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, volatile solvents present difficulties in the preparation and storage of electrolyte compositions, as well as in loading the compositions into cells during manufacture
Another common problem with some traditional electrolyte solvents is that they often have a surface energy that is too high to wet the battery components on their own

Method used

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  • Electrolyte composition
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Examples

Experimental program
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preparation example Construction

[0051] Preparation of hydrofluoroether compounds

[0052] Said hydrofluoroether compound is prepared by first carrying out a free radical addition reaction of at least one perfluoroalkene or perfluorovinyl ether starting compound with at least one hydrocarbon alcohol or an adductable fluorocarbon alcohol. This results in the formation of at least one fluoroalcohol intermediate. The fluoroalcohol intermediate can then be anionized with at least one perfluoroalkene or perfluorovinyl ether modifying compound (which may be the same or different than the perfluoroalkene or perfluorovinyl ether used in the first addition reaction) addition to form at least one hydrofluoroether compound. Alternatively, when the alcohol is polyfunctional, the type of addition reaction can be reversed, wherein the first addition reaction is anionic addition and the second addition reaction is free radical addition. Therefore, the sequence of steps is non-limiting and can be modified to obtain the d...

example

[0092] Objects and advantages of this invention are further illustrated by the following examples, but the particular materials and amounts thereof recited in these examples, as well as other conditions and details, should not be construed to unduly limit this invention. These examples are illustrative only, and are not intended to limit the scope of the appended claims.

[0093] All parts, percentages, ratios, etc. in the examples and in the rest of the specification are by weight unless otherwise indicated. Solvents and other reagents used were obtained from Aldrich Chemical Company, Milwaukee, Wisconsin unless otherwise indicated.

[0094] In the preparation of the following compounds, diastereomeric mixtures are obtained due to the presence of two (or more) optical centers in the molecule. These diastereomers have boiling points very close to each other and therefore diastereomers cannot be separated by distillation. In many cases, however, the above diastereomers are re...

Embodiment 1 to 65

[0162] Examples 1 to 65 were implemented to determine the stability of the electrolyte composition of the present invention. 1 mole lithium hexafluorophosphate (LiPF 6 ) is dissolved in 1 L of solvent mixture and then equilibrated at a predetermined temperature to prepare the sample. The solvent mixture comprises ethylene carbonate (EC), diethyl carbonate (DEC), ethyl methyl carbonate (EMC) and hydrofluoroether (HFE) according to the invention in different proportions. The HFE always used for instances 1 to 83 is CF 3 CFHCF 2 CH(CH 3 )OCF 2 CFHCF 3 Or compound No. 3 above. The stability of the electrolyte composition was determined by visual observation of the samples for clarity, homogeneity, and presence of multiple phases. A transparent, homogeneous and single-phase electrolyte composition at a given temperature leads to the conclusion that it is stable at this temperature. Table I below summarizes the results of the visual observations, the temperatures at which th...

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Abstract

An electrolyte composition includes (a) a solvent composition including at least one hydrofluoroether compound, the hydrofluoroether compound including two terminal fluoroalkyl groups and an intervening substituted or unsubstituted oxymethylene group, each of the fluoroalkyl groups including only one hydrogen atom and, optionally, at least one catenated (that is, in-chain) heteroatom, with the proviso that, when the oxymethylene group is unsubstituted, at least one of the terminal fluoroalkyl groups is branched and / or includes at least one catenated heteroatom; and (b) at least one electrolyte salt.

Description

[0001] priority statement [0002] This application claims priority to U.S. Provisional Applications 60 / 715,291, filed September 8, 2005, and U.S.S.N. 11 / 381,862, filed May 5, 2006, the contents of which are incorporated herein by reference. technical field [0003] The present invention relates to electrolyte compositions comprising at least one partially fluorinated compound and at least one electrolyte salt. In other aspects, the present invention also relates to electrochemical devices comprising the electrolyte composition and articles of manufacture comprising the electrochemical device. Background technique [0004] The rapid development of electronic devices has increased the market demand for electrochemical devices such as fuel cells, capacitors, electrochromic windows and battery systems. In particular, practical rechargeable lithium batteries have been actively developed in response to demands for battery systems. These systems are generally based on the use o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/40H01M4/02H01M4/131H01M4/133H01M10/0568H01M10/0569
CPCH01M4/131H01M4/133H01M10/0568H01M10/0569Y02E60/10Y02P70/50H01M10/05H01M10/052
Inventor 迈克尔·G·科斯特洛理查德·M·弗林濑川晴贵
Owner 3M INNOVATIVE PROPERTIES CO
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