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Electrolyte and storage device using electrolyte

An energy storage device and electrolyte technology, applied in electrolytic capacitors, hybrid capacitor electrolytes, circuits, etc., can solve the problems of voltage limitation, poor solubility, and inability to reduce the internal resistance of capacitors, and achieve higher specific conductivity and higher solubility. Effect

Inactive Publication Date: 2013-01-23
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] For electrolytes with quaternary ammonium cations at both ends of the polymer chain and in the backbone, there are problems that when a high voltage is applied, decomposition due to hydrolysis is easily caused, the voltage is limited, and there are problems that it needs to go through multiple stages in the synthesis. Chemical reaction, the problem that makes the cost high
[0009] In addition, for the electrolyte whose polymer chain is an alkyl chain, there is a problem that the solubility is poor, the electrolyte concentration cannot be increased, and the internal resistance of the capacitor cannot be reduced.

Method used

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  • Electrolyte and storage device using electrolyte
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  • Electrolyte and storage device using electrolyte

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] The general formula HO-(CH 2 -CH 2 -O) n -CH 2 -CH 2 Polyethylene glycol represented by -OH is used as a starting material, and an electrolyte compound is synthesized through an organic reaction shown in Scheme 1 below. A representative example of polyethylene glycol in which n is 1 is given in Scheme 1. In addition, in Figure 1, the length of the main chain can be appropriately selected by appropriately selecting the number of n of polyethylene glycol as the starting material, or the type of counter anion can be appropriately selected by appropriately selecting the type of acid to be added.

[0081]

[0082]

[0083] In Scheme 1 above, Me represents a methyl group.

[0084] In Figure 1, 10.6 g (0.1 mol) of diethylene glycol (manufactured by Tokyo Chemical Industry Co., Ltd., 1 in Figure 1) was dissolved in 50 mL of dichloromethane (manufactured by Kanto Chemical Co., Ltd.) under a nitrogen atmosphere, and cooled until it became is 0°C. After cooling, 54.1 g...

Embodiment 2

[0106] In Example 1, the structural formula HO-(CH 2 -CH 2 -O) 2 -CH 2 -CH 2 15 g (0.1 mol) of polyethylene glycol (also called triethylene glycol) represented by -OH (manufactured by Tokyo Chemical Industry) instead of 10.6 g (0.1 mol) of diethylene glycol (manufactured by Tokyo Chemical Industry), and the same as in Example 1 In the same manner, an electrolyte compound was synthesized, an electrolytic solution was prepared, and a button-type electric double layer capacitor was produced, and the internal resistance value and capacitance before and after the load test were measured. The results are shown in Table 1.

[0107] In addition, as a result of elemental analysis of the obtained binary quaternary ammonium salt, the content ratio of carbon, hydrogen, and nitrogen was 12:30:2 (atomic ratio).

Embodiment 3

[0109] In Example 1, the structural formula HO-(CH 2 -CH 2 -O) 3 -CH2 -CH 2 -OH represents polyethylene glycol (also called triethylene glycol) (manufactured by Tokyo Chemical Industry) 19g (0.1mol) instead of diethylene glycol (manufactured by Tokyo Chemical Industry) 10.6g (0.1mol). 1 In the same manner, an electrolyte compound was synthesized, an electrolytic solution was prepared, and a button-type electric double layer capacitor was produced, and the internal resistance value and capacitance before and after the load test were measured. The results are shown in Table 1.

[0110] In addition, as a result of elemental analysis of the obtained binary quaternary ammonium salt, the content ratio of carbon, hydrogen, and nitrogen was 14:34:2 (atomic ratio).

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Abstract

Disclosed is an electrolyte containing an electrolyte compound comprising quaternary ammonium cations at both ends of a molecular chain containing repeating alkylene oxide units. The electrolyte compound is preferably the form represented by general formula (1) below, or the like. In general formula (1) below, R1, R2, R3, R4, R5 and R6 may each be any of a hydrogen atom, an alkyl group, an alkenyl group, an aryl group, and a heterocyclic group, and may link to each other to form a cyclic structure. N is an integer from 1 to 10 representing the number of alkylene oxide repetitions.

Description

technical field [0001] The present invention relates to an electrolytic solution and an electrical storage device using the electrolytic solution. Background technique [0002] Electrochemical capacitors (electric double-layer capacitors) are different from secondary batteries in that they do not store electrical energy through the chemical reaction of the electrodes, but ionic molecules store charges, so the deterioration caused by charging and discharging is small, and there is only a small amount of The deterioration of the electrode near the withstand voltage and the deterioration of the ionic molecules of the electrolyte can be charged and discharged several million times, and it is promising as a power storage device with a high charge and discharge frequency. [0003] However, the withstand voltage of electrochemical capacitors is low, and the maximum chargeable voltage is about 3V, so they need to be connected in series when the charge voltage is high. Here, if para...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/62
CPCH01G9/035H01G9/155H01G9/042H01G11/62Y02E60/13H01G9/038
Inventor 佐佐匡昭山本保田中努吉田贤介
Owner FUJITSU LTD