Magnesium ion-containing nonaqueous electrolyte solution and electrochemical device using the same

A non-aqueous electrolyte and magnesium ion technology, which is applied in electrochemical generators, battery electrodes, electrode carriers/collectors, etc., can solve the problem of low equilibrium potential and achieve the effect of increasing discharge capacity

Inactive Publication Date: 2011-05-04
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the oxidation and decomposition potential of the electrolyte is as low as about 1.5 V relative to the equilibrium potential of metallic magnesium

Method used

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  • Magnesium ion-containing nonaqueous electrolyte solution and electrochemical device using the same
  • Magnesium ion-containing nonaqueous electrolyte solution and electrochemical device using the same
  • Magnesium ion-containing nonaqueous electrolyte solution and electrochemical device using the same

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Embodiment approach

[0145] In this embodiment mode, a description will now be given about a nonaqueous electrolytic solution containing magnesium ions therein based on the present invention, and a magnesium battery as an example of an electrochemical device using the nonaqueous electrolytic solution. In this regard, it should be noted in advance that the description given here is only an example, and thus the present invention is by no means limited thereto. Although in the following, a coin type (also called a button type) battery will be described, the present invention can also be applied to a cylindrical or square battery having a spiral structure inside, with a thin positive electrode and a thin negative electrode wound with a separator in between. Into a spiral shape, so the same effect as a coin-type battery can be obtained.

[0146] figure 1is a cross-sectional view showing the structure of the magnesium battery 10 in the embodiment of the present invention.

[0147] like figure 1 As s...

Embodiment 1

[0172] In Example 1, figure 1 The illustrated coin-type magnesium battery 10 was manufactured by using metallic magnesium as the negative electrode active material 5, by using magnesium oxide as the positive electrode active material, and by using the electrolytic solution according to the present invention, and the performance of the electrolytic solution was examined.

[0173]

[0174] 0.12 g of metallic magnesium was added to 10 ml of 1,2-dimethoxyethane. In addition, 0.55 ml of methyl trifluoromethanesulfonate (MeTFS), 2.47 g of tetrabutylammonium tetrafluoroborate (TBABF 4 ), and 0.33g of aluminum chloride (AlCl 3 ). This corresponds to magnesium metal, methyl trifluoromethanesulfonate, tetrabutylammonium tetrafluoroborate and aluminum chloride at a ratio of 0.50 mol / l to 1,2-dimethoxyethane, respectively, at 0.50 mol / l The ratio of 0.75mol / l, and the ratio of 0.25mol / l was added. Heat treatment was performed at 60° C. for 20 hours while stirring them, so that both ...

Embodiment 2

[0198] In Example 2, the concentration of methyl triflate was changed in the range of 0 mol / l to 0.80 mol / l, and thus an electrolytic solution was prepared. Except for this point, a magnesium battery 10 using an electrolytic solution was manufactured similarly to the case of Example 1, and a discharge test was performed on the magnesium battery 10 .

[0199] image 3 It shows the Mg, MeTFS, TBABF used in the synthesis electrolyte solution in Comparative Example 2-1, Example 2-1 to Example 2-7 and Example 1 of the present invention 4 , AlCl 3 , and BF 3 A graph showing the relationship between the concentration of DEE, heating temperature, and the discharge capacity of a magnesium battery using the synthesized electrolyte.

[0200] image 3 (A) in is a numerical table showing the above-mentioned concentration, heating temperature and discharge capacity, and image 3 (B) in image 3 A graph in which the discharge capacity shown in (A) is expressed in the form of a curve. ...

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Abstract

Disclosed is a magnesium ion-containing nonaqueous electrolyte solution having excellent electrochemical characteristics, which can be produced in a general production environment such as a dry room. An electrochemical device using the magnesium ion-containing nonaqueous electrolyte solution is also disclosed. An Mg battery comprises a positive electrode can (1), a positive electrode pellet (2) composed of a positive electrode active material and the like, a positive electrode (11) composed of a metal mesh support (3), a negative electrode cup (4), a negative electrode (12) composed of a negative electrode active material (5), and a separator (6) impregnated with an electrolyte solution (7) and arranged between the positive electrode pellet and the negative electrode active material. The electrolyte solution is prepared by adding and heating Mg metal, an alkyl trifluoromethanesulfonate, a quaternary ammonium salt or / and 1,3-alkylmethylimidazolium salt, preferably an aluminum halide in an ether organic solvent, and then adding a trifluoroborane-ether complex salt thereinto. Since the positive electrode active material is in contact with copper, a large discharge capacity can be obtained.

Description

technical field [0001] The present invention relates to a nonaqueous electrolytic solution containing magnesium ions therein, and an electrochemical device using the electrolytic solution. Background technique [0002] As a material suitable for the negative electrode active material which is one of the basic constituent materials of the battery, there are given metals which easily release electrons to become cations, that is, metals which have a high ionization tendency. In a battery using a nonaqueous electrolytic solution, metallic lithium is given as this example. A battery using metallic lithium as an anode active material is constructed as a battery using a non-aqueous electrolyte based on a combination of various cathode active materials, such as oxides and sulfides, to be commercialized. Therefore, the battery is mainly used as a power source for small portable electronic devices. [0003] In recent years, convenience, miniaturization, weight reduction, thinning, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/40H01M4/46H01M4/58H01M4/62H01M2/02H01M4/133H01M4/583H01M4/66H01M10/054H01M10/0567H01M10/0568H01M10/0569
CPCH01M4/38H01M4/466H01M4/587H01M4/74H01M6/164H01M10/054H01M10/0566H01M50/109Y02E60/10
Inventor 山本贤太中山有理仙田结
Owner SONY CORP
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