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Mixture, cation conductor and electrochemical device using those

A technology of mixtures and cations, applied in the direction of conductive materials, conductive materials, organic material conductors, etc., can solve the problems of long-term continuous use difficulties, the decline of proton conductivity, etc., and achieve the effect of preventing the reduction and preventing the conductivity

Inactive Publication Date: 2007-04-04
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when the fuel cell is operated at room temperature, the proton conductor is gradually eluted from the inside due to the water generated in the oxygen electrode at the time of energy generation, resulting in a disadvantage that the proton conductivity decreases
Therefore, when these proton conductors are used, although they are usable at or above the boiling point of water, long-term continuous use becomes difficult at or below the boiling point of water

Method used

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  • Mixture, cation conductor and electrochemical device using those
  • Mixture, cation conductor and electrochemical device using those
  • Mixture, cation conductor and electrochemical device using those

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1 to 1-6

[0127] The mixture described in this embodiment is formed. For the first compound, 2-phenylimidazole represented by Chemical Formula 21 (hereinafter referred to as "2PhIm") was used. As the second compound, pentafluoroethanesulfonimido (hereinafter referred to as "HBETI") represented by Chemical Formula 26 was used. In Examples 1-1 to 1-6, the molar ratio between 2PhIm and HBETI in the mixture was changed to 2PhIm:HBETI=4:6, 5:5, 6:4, 7:3, 8:2 or 9 : 1. Specifically, relative to 1.524g (4.00mmol) HBETI, the mixing ratio of 2PhIm is 0.3842g (2.66mmol) in Example 1-1, and 0.5763g (4.00mmol) in Example 1-2. Be 0.8644g (6.00mmol) in example 1-3, be 1.345g (9.34mmol) in example 1-4, be 2.305g (16.0mmol) in example 1-5, in example 1-6 It was 5.187g (36.0mmol). The mixing process was carried out in a glove box under an argon (Ar) atmosphere, a moisture concentration of 10 ppm or less, and a temperature of 150° C. (equal to or higher than the melting point of 2 PhIm (136° C.)) for...

Embodiment 2-1 and 2-2

[0135] A mixture was formed as in Examples 1-2 and 1-4, except that 4-phenylimidazole (hereinafter referred to as "4PhIm") was used as the first compound. Thereafter, as in Examples 1-2 and 1-4, the melting point and glass transition temperature were determined by DSC measurement, and the water solubility and ion conductivity were determined by AC impedance measurement. The results are shown in Table 2 and Figure 4. Also shown in Figure 4 are the results of Examples 1-2 and 1-4.

[0136] First

[0137] As shown in Table 2, the melting point of each mixture was found to drop to a level below the melting point of 4PhIm (129°C). Further, these mixtures were found to be insoluble in water. And as shown in FIG. 4 , it was found that at a temperature of 110° C. or higher, the same ion conductivity as that of Examples 1-2 and 1-4 was exhibited. That is, it was found that, as in Examples 1-1 to 1-6, even when other imidazoles were used, the mixture was insoluble in wat...

Embodiment 3-1-1、3-1-2、3-2-1 and 3-2-2

[0139] In addition to using 2-isopropylimidazole shown in Chemical Formula 17 (hereinafter referred to as "2-i-PrIm") or 2-n-propylimidazole shown in Chemical Formula 19 (hereinafter referred to as "2-n-PrIm") ") As the first compound, a mixture was formed as in Examples 1-2 and 1-4. Thereafter, as in the case of Examples 1-2 and 1-4, melting point and glass transition temperature were determined by DSC measurement, and water solubility and ion conductivity were determined by AC impedance measurement. The results are shown in Table 3 and Figure 5. In Fig. 5, the ionic conductivities of the mixtures in Examples 3-1-2 and 3-2-2, which are typical examples at room temperature, are shown together with the ionic conductivities of Examples 1-4 As a liquid, the molar ratio of 2-i-PrIm or 2-n-PrIm to HBETI is 7:3.

[0140] First

compound

second

compound

mix

Proportion

melting point

water soluble

Example ...

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PUM

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Abstract

Disclosed are a mixture and a cation conductor which are capable of transferring cations without humidification even in the temperature range not higher than the boiling point of water. Also disclosed is an electrochemical device such as a fuel cell which uses the mixture or cation conductor. The electrochemical device comprises a fuel electrode (12) and an oxygen electrode (13) arranged opposite to each other via an electrolyte membrane (11). The electrolyte membrane (11) contains a first compound composed of an imidazole derivative containing N having an unshared electron pair and a second compound composed of at least one compound selected from the group consisting of compounds having structures represented by the formulae below.

Description

technical field [0001] The present invention relates to mixtures and cation conductors containing compounds with specific structures, and electrochemical devices. Background technique [0002] In recent years, since fuel cells can convert fuel energy into electricity very efficiently, and because fuel cells are clean and do not release environmental pollutants such as nitrogen oxides, fuel cells have become the next generation of environmentally friendly power generation devices. Attracting attention, its development has been actively promoted in different fields. [0003] Fuel cells can be roughly classified according to the type of proton conductor. The reason for this is that the performance of the proton conductor largely depends on the operating conditions or operating temperature of the fuel cell. Therefore, improving the performance of proton conductors is the key to obtaining high-performance fuel cells. [0004] Among these fuel cells, there is a fuel cell using ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/06C07C309/06C07C311/48C07C317/04C07D233/58H01B1/12H01M8/02H01M8/10
CPCH01M8/1044C07C317/04C07C311/48H01B1/122H01M8/1027H01M8/103Y02E60/521H01M2300/0091H01M8/1032H01M8/106H01M2300/0065Y02E60/50
Inventor 福岛和明开本拓郎泷泽修一西本淳野田和宏
Owner SONY CORP
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