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Gel electrolyte, hard gel electrolyte, and electrochemical device

A gel electrolyte and electrochemical technology, which is applied in the direction of electrolyte immobilization/gelation, non-aqueous electrolyte storage battery, electrochemical generator, etc., can solve problems such as undeniable electrolyte leakage, and achieve good device performance.

Pending Publication Date: 2020-05-01
DAI ICHI KOGYO SEIYAKU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the electrolyte is a general electrolyte, the possibility of electrolyte leakage from the electrochemical device cannot be denied

Method used

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  • Gel electrolyte, hard gel electrolyte, and electrochemical device
  • Gel electrolyte, hard gel electrolyte, and electrochemical device
  • Gel electrolyte, hard gel electrolyte, and electrochemical device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0135] The following work is carried out in a dry air atmosphere with a dew point below -50°C. As shown in Table 1, 1.8 parts by mass of polyvinylidene fluoride (PVDF, manufactured by KUREHA Co., Ltd., product name: KF POLYMER#7200) as a matrix material was mixed with acetone (Wako Pure Chemical Industries, Ltd. (manufactured) 33 parts by mass were heated and dissolved at 80° C., and left still at room temperature to prepare a PVDF / acetone gel (non-electrolyte gel-like body).

[0136] In addition, as shown in Table 1, 10 parts by mass of lithium bis(fluorosulfonyl)imide (LiFSI, manufactured by KISHIDA Chemical Co., Ltd., lithium battery grade (LBG)) as a lithium salt was used as an electrolyte solution of an ionic liquid system. As a solvent, 49 parts by mass of 1-ethyl-3-methylimidazolium bis(fluorosulfonyl)imide (EMImFSI, manufactured by Daiichi Kogyo Pharmaceutical Co., Ltd., product name: Elexcel IL-110) as a post-curing agent 1.3 parts by mass of tetrafunctional polyethe...

Embodiment 2、3

[0145]Except that the compounding amount of the electrolyte solvent and the compounding amount of the post-curing agent were changed as shown in Table 1, the gel electrolyte related to Example 2 or the gel related to Example 3 were produced in the same manner as in Example 1. electrolyte, and a coin cell for evaluation as the electrochemical device according to Example 2 or the electrochemical device according to Example 3 was produced.

[0146] It should be noted that, as shown in Table 1, in the gel electrolyte involved in Example 2 or the gel electrolyte involved in Example 3, the mass ratio of the reactive group relative to the mass of the electrolyte solvent is between 0.03 and 6.5 mass %, the mass ratio of the electrolyte solvent to the total mass is in the range of 20-80 mass%, and the mass ratio of the matrix material to the total mass is in the range of 1.0-10 mass%.

[0147] For the obtained gel electrolyte related to Example 2 or 3, as described above, the shear ela...

Embodiment 4

[0151] The following operations were carried out in a dry air atmosphere having a dew point of -50° C. or lower in the same manner as in Examples 1 to 3. As shown in Table 2, the vinylidene fluoride-hexafluoropropylene copolymer (PVDF-HFP, manufactured by KUREHA Co., Ltd., product name: KFPOLYMER#8500) as a matrix material is abbreviated as "PVDF-HFP [1] in Table 2. ”) 2.9 parts by mass were dissolved by heating at 80° C. with respect to 29.5 parts by mass of dimethyl ether (DME, manufactured by Wako Pure Chemical Industries, Ltd.) as a diluting solvent. Based on this, liquid A was prepared as a DME diluted solution of PVDF-HFP.

[0152] In addition, as shown in Table 2, 9.3 parts by mass of LiFSI (refer to Example 1) as a lithium salt, 28 parts by mass of EMImFSI (refer to Example 1) as an electrolyte solution solvent of an ionic liquid system, and LiFSI (refer to Example 1) as a post-curing agent 0.90 parts by mass of functional polyether acrylate (refer to Example 1), 0.12...

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Abstract

The present invention provides a gel electrolyte capable of promoting the efficient production of an electrochemical device and achieving good device performance in the obtained electrochemical device. The gel electrolyte is a gel-like body composed of at least a matrix material and an electrolyte solution, and contains a crosslinkable reactive group. By curing the reactive group through a crosslinking reaction, the gel electrolyte is used as an electrolyte for an electrochemical device. The electrolyte solution is composed of at least an ionic substance and an electrolyte solution solvent, wherein the mass of the reactive group contained in the gel-like body is 0.03-6.5 mass% with respect to the mass of the electrolyte solution solvent, and the shear modulus of the gel-like body in a state in which the reactive group is not reacted is 1 MPa or greater.

Description

technical field [0001] The present invention relates to a gel-like body containing a cross-linkable reactive group, to a gel electrolyte capable of being used as an electrolyte in an electrochemical device by curing the reactive group through a cross-linking reaction, and to making the gel electrolyte A hard gel electrolyte (hard gel electrolyte) after the gel electrolyte is solidified, and an electrochemical device having the hard gel electrolyte. Background technique [0002] As electrochemical devices using electrochemical reactions, various batteries, some solar cells, capacitors (condensers) and the like are known, for example. Electrolytes used in these electrochemical devices have conventionally used liquids (electrolyte solutions). However, if the electrolyte is a general electrolytic solution, the possibility of electrolyte leakage from the electrochemical device cannot be denied. Therefore, in recent years, for example, the electrochemical cell disclosed in Paten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565C08J3/24H01B1/06H01G9/20H01G11/56
CPCH01M10/0565C08J3/24H01B1/06H01G9/20H01G11/56Y02E10/542Y02E60/10Y02P70/50H01B1/122H01M10/052H01M2300/0085
Inventor 齐藤恭辉奥原淳史
Owner DAI ICHI KOGYO SEIYAKU CO LTD
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