Agent for forming electrode protection film

An electrode protective film and electrode technology, applied in battery electrodes, hybrid capacitor electrodes, batteries, etc., can solve the problems of battery swelling, decrease in charge-discharge cycle characteristics, etc., to improve long-term durability, excellent long-term stability, and improve charge and discharge. Effect of cycle performance and high temperature storage characteristics

Inactive Publication Date: 2015-02-18
SANYO CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, since the non-aqueous electrolyte is easily decomposed due to the increase in charging voltage, there is a problem that the charge-discharge cycle characteristics are reduced or the battery expands due to the generation of gas such as carbon dioxide during high-temperature storage.

Method used

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  • Agent for forming electrode protection film
  • Agent for forming electrode protection film
  • Agent for forming electrode protection film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0120] Hereinafter, although an Example demonstrates this invention further, this invention is not limited to these Examples. Hereinafter, unless otherwise specified, % means % by weight, and part means parts by weight.

[0121] Electrode protective film forming agent (D)

[0122] The number average molecular weight of compound (C-15) was measured using GPC under the following conditions.

[0123] Device (one example): HLC-8120 manufactured by Tosoh Co., Ltd.

[0124] String (one example): TSK GEL GMH6, two pieces, [manufactured by Tosoh Co., Ltd.]

[0125] Measuring temperature: 40°C

[0126] Sample solution: 0.25% by weight THF solution

[0127] Solution injection volume: 100μl

[0128] Detection device: Refractive index detector

[0129] Reference material: manufactured by Tosoh Co., Ltd., standard polystyrene (TSK standard POLY STYRENE), 5 points (Mw 500 1050 2800 5970 9100)

manufacture example 1

[0131] Synthesis of 1-hydroxymethyl-4-(1-propenyloxymethyl)cyclohexane:

[0132] 9.86 parts of 1,4-cyclohexanedimethanol [manufactured by Tokyo Chemical Industry Co., Ltd.] and allyl chloride [manufactured by Tokyo Chemical Industry Co., Ltd.] were added to a flask equipped with a stirrer, a thermometer, and a cooling tube. After stirring 5.76 parts, 6.00 parts of sodium hydroxide, and 100 parts of toluene to dissolve the above-mentioned components uniformly, it stirred at room temperature for 15 minutes, and then added 1.32 parts of tetrabutylammonium bromide. After raising the temperature to 65° C. over 2 hours, it was further stirred for 4 hours to perform etherification reaction and rearrangement reaction. After standing to cool, 200 parts of water were added, and the water layer was separated. Furthermore, the organic layer was washed with 200 parts of water. After removing toluene under reduced pressure (1.3kPa), pass through an alumina column [150 mesh (mesh), Brockmanl...

Embodiment 1

[0134] Synthesis of compound (C-1) for electrode protective film forming agent

[0135] Add 15.0 parts of 1-hydroxymethyl-4-(1-propenyloxymethyl)cyclohexane, 7.3 parts of butyl isocyanate, 100 parts of toluene and N to a flask equipped with a stirrer, a thermometer and a cooling tube, 0.5 part of N,N',N'-tetramethylethylenediamine was heated at 80°C for 8 hours. After removing toluene under reduced pressure (1.3kPa), pass through an alumina column [150 mesh, Brockmanl, standard grade, manufactured by Sigma Aldrich (Sigma Aldrich) Co., Ltd.] with hexane and ethyl acetate as developing solvent The reactant was purified to obtain 8.8 parts of a compound (C-1) represented by the following formula [yield 42%, Mn: 283 (calculated value from the chemical formula)]. Let (C-1) be an electrode protective film forming agent (D-1).

[0136] [chemical 4]

[0137]

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Abstract

The purpose of the present invention is to provide an electrode or electrolyte solution for electrochemical devices, which has excellent long-term stability and can be used in a wide temperature range. An agent for forming an electrode protection film, which contains a compound that has a urethane bond and a polymerizable unsaturated bond and that is preferably represented by general formula (1). (In formula (1), A represents (i) an n-valent hydrocarbon group having 2-42 carbon atoms, (ii) a trivalent residue that is obtained by removing three isocyanate groups from a trimer of a diisocyanate (B) having 2-42 carbon atoms or (iii) a divalent residue that is obtained by removing two isocyanate groups from a urethane prepolymer having isocyanate groups at both ends, said urethane prepolymer being a reaction product of a diisocyanate (B) having 2-42 carbon atoms and a diol (N) having 2-20 carbon atoms; X represents a monovalent organic group having a polymerizable unsaturated bond (b) and 3-42 carbon atoms; and n represents an integer of 1-6, and in cases where n is 2 or more, the plurality of X moieties may be the same as or different from each other.) A(-NHCO2-X)n (1)

Description

technical field [0001] The present invention relates to an additive that can be preferably used in electrodes and electrolytes for electrochemical elements, and electrodes and electrolytes using the additives. In more detail, it relates to an electrode protective film forming agent useful for a lithium secondary battery, a lithium-ion capacitor, or an electric double-layer capacitor, and an electrode and an electrode using the electrode protective film forming agent. electrolyte. Background technique [0002] Non-aqueous electrolyte secondary batteries such as lithium secondary batteries have the characteristics of high voltage and high energy density, so they are widely used in the field of portable information equipment, etc., and their demand is expanding rapidly. At present, It has established its status as a standard battery for mobile information equipment such as mobile phones and note personal computers. Of course, with the high performance and multifunctionality o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01G11/22H01G11/54H01M10/0567
CPCH01M10/4235H01M10/0567Y02E60/122Y02E60/13H01M4/622H01G11/22H01M10/052H01G11/54H01G11/50C07D251/34C07C271/16C09D4/00C08F222/10C07C271/12C08F116/12C08F116/14C08F222/1065Y02E60/10C07C271/24C25D9/02H01G11/00H01M2220/30H01M2300/0025
Inventor 高田顺子田边史行
Owner SANYO CHEM IND LTD
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