KR100349128B1 - A preparation method for electrolyte for aluminum electrolytic capacitor for low pressure - Google Patents
A preparation method for electrolyte for aluminum electrolytic capacitor for low pressure Download PDFInfo
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- KR100349128B1 KR100349128B1 KR1020000060631A KR20000060631A KR100349128B1 KR 100349128 B1 KR100349128 B1 KR 100349128B1 KR 1020000060631 A KR1020000060631 A KR 1020000060631A KR 20000060631 A KR20000060631 A KR 20000060631A KR 100349128 B1 KR100349128 B1 KR 100349128B1
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- electrolyte
- maleic acid
- salt
- phthalic acid
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- 239000003792 electrolyte Substances 0.000 title claims abstract description 23
- 239000003990 capacitor Substances 0.000 title claims abstract description 20
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 18
- 238000002360 preparation method Methods 0.000 title abstract description 3
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000008151 electrolyte solution Substances 0.000 claims abstract description 26
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims abstract description 25
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 claims abstract description 25
- 239000011976 maleic acid Substances 0.000 claims abstract description 25
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 claims abstract description 25
- 150000002460 imidazoles Chemical class 0.000 claims abstract description 23
- 239000000203 mixture Substances 0.000 claims abstract description 16
- 150000001768 cations Chemical class 0.000 claims abstract description 9
- 150000001450 anions Chemical class 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 4
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 claims description 35
- 239000004215 Carbon black (E152) Substances 0.000 claims description 10
- 229930195733 hydrocarbon Natural products 0.000 claims description 10
- 150000002430 hydrocarbons Chemical class 0.000 claims description 10
- 239000002904 solvent Substances 0.000 claims description 8
- 150000003839 salts Chemical class 0.000 claims description 4
- 239000007788 liquid Substances 0.000 abstract 1
- MCTWTZJPVLRJOU-UHFFFAOYSA-N 1-methyl-1H-imidazole Chemical compound CN1C=CN=C1 MCTWTZJPVLRJOU-UHFFFAOYSA-N 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000000654 additive Substances 0.000 description 5
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Substances C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 229920002113 octoxynol Polymers 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 3
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical class CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 2
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- AFYHLNMVDGXEFU-UHFFFAOYSA-N (Z)-but-2-enedioic acid oxolan-2-one Chemical compound C1(CCCO1)=O.C(C=C/C(=O)O)(=O)O AFYHLNMVDGXEFU-UHFFFAOYSA-N 0.000 description 1
- GEWWCWZGHNIUBW-UHFFFAOYSA-N 1-(4-nitrophenyl)propan-2-one Chemical compound CC(=O)CC1=CC=C([N+]([O-])=O)C=C1 GEWWCWZGHNIUBW-UHFFFAOYSA-N 0.000 description 1
- -1 1-cyanoethyl Chemical group 0.000 description 1
- PAPPEKHULAQSEJ-UHFFFAOYSA-N 2-(1h-imidazol-2-yl)propanenitrile Chemical compound N#CC(C)C1=NC=CN1 PAPPEKHULAQSEJ-UHFFFAOYSA-N 0.000 description 1
- ZPGCVVBPGQJSPX-UHFFFAOYSA-N 2-imidazol-1-ylacetonitrile Chemical compound N#CCN1C=CN=C1 ZPGCVVBPGQJSPX-UHFFFAOYSA-N 0.000 description 1
- LXBGSDVWAMZHDD-UHFFFAOYSA-N 2-methyl-1h-imidazole Chemical compound CC1=NC=CN1 LXBGSDVWAMZHDD-UHFFFAOYSA-N 0.000 description 1
- UIDDPPKZYZTEGS-UHFFFAOYSA-N 3-(2-ethyl-4-methylimidazol-1-yl)propanenitrile Chemical compound CCC1=NC(C)=CN1CCC#N UIDDPPKZYZTEGS-UHFFFAOYSA-N 0.000 description 1
- SESYNEDUKZDRJL-UHFFFAOYSA-N 3-(2-methylimidazol-1-yl)propanenitrile Chemical compound CC1=NC=CN1CCC#N SESYNEDUKZDRJL-UHFFFAOYSA-N 0.000 description 1
- ULKLGIFJWFIQFF-UHFFFAOYSA-N 5K8XI641G3 Chemical compound CCC1=NC=C(C)N1 ULKLGIFJWFIQFF-UHFFFAOYSA-N 0.000 description 1
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 1
- 235000011037 adipic acid Nutrition 0.000 description 1
- 239000001361 adipic acid Substances 0.000 description 1
- 125000000320 amidine group Chemical group 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- CBXCPBUEXACCNR-UHFFFAOYSA-N tetraethylammonium Chemical class CC[N+](CC)(CC)CC CBXCPBUEXACCNR-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/022—Electrolytes; Absorbents
- H01G9/035—Liquid electrolytes, e.g. impregnating materials
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
Abstract
본 발명은 전해액의 제조시 첨가되는 성분들의 조성을 적절히 제어하여, 전해액의 전도도 및 SPV(내전압, sparking voltage)를 높이어 제품화시 손실각과 함께 등가 직류 저항(ESR)을 낮추고 보다 낮은 온도범위에서 제조할 수 있는 저압용 알루미늄 전해 커패시터의 전해액을 제공하고자 하는데, 그 목적이 있다.The present invention can appropriately control the composition of the components added during the preparation of the electrolyte solution to increase the conductivity and SPV (sparking voltage) of the electrolyte solution to reduce the equivalent DC resistance (ESR) with the loss angle in the commercialization and can be produced in a lower temperature range An object of the present invention is to provide an electrolyte of a low voltage aluminum electrolytic capacitor.
상기 목적을 달성하기 위한 본 발명은 저압용 알루미늄 전해 커패시터에 사용되는 전해액에 있어서, 양이온으로서 이미다졸염에 음이온으로서 말레산과 프탈산을 적정비로 혼합한 액을 전해질로 사용함으로써 저압용 알루미늄 커패시터를 제조하는 방법에 관한 것을 그 요지로 한다.The present invention for achieving the above object is to prepare a low-pressure aluminum capacitor by using a liquid in which a mixture of maleic acid and phthalic acid as an anion to an imidazole salt as a cation as an electrolyte in an electrolyte solution used in a low-pressure aluminum electrolytic capacitor It is the point about the method.
Description
본 발명은 저압용 알루미늄 전해 커패시터에 사용되는 전해액 및 그 제조방법에 관한 것으로, 보다 상세하게는 제품화시 손실각과 등가직류저항(이하, 'ESR'이라 한다) 특성이 모두 저감된 저압용 알루미늄 전해 커패시터의 전해액 및 그 제조방법에 관한 것이다.The present invention relates to an electrolyte used in a low pressure aluminum electrolytic capacitor and a method for manufacturing the same. More specifically, a low pressure aluminum electrolytic capacitor having both reduced loss angle and equivalent DC resistance (hereinafter, referred to as 'ESR') characteristics during commercialization. It relates to an electrolyte solution and a method for producing the same.
일반적으로 알루미늄 전해 커패시터는 저압용 (160WV이하), 중압용 (160∼400WV), 고압용 (400WV이상)으로 분류되며, 이러한 분류의 기준은 일반적으로 전해 커패시터의 내부에 장입되는 전해액에 따라 결정된다.Generally, aluminum electrolytic capacitors are classified into low pressure (below 160WV), medium pressure (160 ~ 400WV), and high pressure (more than 400WV), and the criteria of this classification are generally determined by the electrolyte loaded into the electrolytic capacitor. .
상기와 같이 분류되는 전해액 중에서 정격전압이 160WV이하인 저압용 알루미늄 전해 커패시터에 사용되는 전해액의 일례를 들면, 70∼90중량%의 γ-부티로락톤(GBL)과 5.5중량%의 물로 이루어지는 용매, 1.9∼20중량%의 아디프산이나 말레산으로부터 선택된 1종의 용질 및 0.1∼3중량%의 트리톤 X로 이루어지는 첨가제로 구성되는 전해액을 들 수 있다. 이와같이, γ-부티로락톤 용매를 사용하는 전해액은 용매와 용질을 투입후 교반시켜 제조한다.Examples of the electrolyte used for the low pressure aluminum electrolytic capacitors having a rated voltage of 160 WV or less among the electrolytes classified as above include a solvent consisting of 70-90 wt% of γ-butyrolactone (GBL) and 5.5 wt% of water, 1.9 The electrolyte solution comprised from the additive which consists of 1 type of solute chosen from -20 weight% adipic acid and maleic acid, and 0.1 to 3 weight% triton X is mentioned. In this way, an electrolyte solution using a γ-butyrolactone solvent is prepared by adding a solvent and a solute, followed by stirring.
이는 말레산의 트리에틸암모늄염, 테트라에틸암모늄염, 프탈산의 트리에틸암모늄염으로 이어져 현재는 전해액이 가져야할 특성중 열안정성, 높은 전도도, 내약품성등을 만족하기 위해 미국특허 제5,870,275호에 개시된 바와 같은 아미딘기(amidine group)를 갖는 말레산의 이미다졸염이 상용화되고 있다.This leads to triethylammonium salt of maleic acid, tetraethylammonium salt, and triethylammonium salt of phthalic acid, which are present in electrolytes to satisfy thermal stability, high conductivity, chemical resistance, and the like, which are disclosed in US Pat. No. 5,870,275. Imidazole salts of maleic acid having an amidine group are commercially available.
그러나 이 경우에 전도도는 개선되는데 반하여 상대적으로 SPV값이 감소하게 되는 단점을 갖는 것으로, 즉, 트리톤 X와 같은 압력을 높일 수 있는 첨가제의 사용을 수반하게 되나, 이같은 첨가제의 사용으로 인해 상대적으로 전도도가 떨어지는 문제가 발생하게 된다.In this case, however, the conductivity is improved, but the SPV value is relatively decreased. That is, the use of an additive capable of increasing pressure, such as Triton X, is used. The problem of falling.
이에 본 발명자는 이같은 문제점을 해결할 뿐만 아니라 전해액 제조 또한 좀더 낮은 온도에서 가능토록 하여 생산성 향상을 가져오게 하기 위하여 연구와 실험을 행하고 본 발명을 제안하게 되었다.The present inventors have not only solved this problem, but also conducted the research and experiment to propose the present invention in order to enable the production of the electrolyte solution at a lower temperature, thereby improving productivity.
본 발명의 목적은 전해액의 제조시 첨가되는 성분들의 조성을 적절히 제어하여, 전해액의 전도도와 SPV를 모두 높임으로써 제품화시 등가직류저항(ESR)특성을 낮출 수 있는 저압용 알루미늄 전해 커패시터의 전해액을 제공하려는데 있다.SUMMARY OF THE INVENTION An object of the present invention is to provide an electrolyte solution for a low pressure aluminum electrolytic capacitor which can lower the equivalent DC resistance (ESR) characteristics during commercialization by appropriately controlling the composition of components added during the preparation of an electrolyte solution, thereby increasing both conductivity and SPV of the electrolyte solution. have.
본 발명의 다른 목적은 제조 온도를 낮추어 생산성을 향상시킬 수 있는 저압용 알루미늄 전해 커패시터의 전해액을 제조하는 방법을 제공하려는데 있다.Another object of the present invention is to provide a method for producing an electrolyte solution of a low pressure aluminum electrolytic capacitor that can improve the productivity by lowering the manufacturing temperature.
본 발명의 일견지에 의하면,According to one aspect of the invention,
γ-부티로락톤 50∼98.1중량%로된 용매; 및solvent of 50-98.1% by weight of γ-butyrolactone; And
양이온으로서 하기식 1Formula 1 as the cation
(상기 식에서, R1은 C1-C10의 하이드로카본기 또는 시안기, C1-C5의 시아노알킬기이며, R2는 C1-C10의 하이드로카본기이다)(Wherein R 1 is a C 1 -C 10 hydrocarbon or cyan group, C 1 -C 5 cyanoalkyl group, and R 2 is a C 1 -C 10 hydrocarbon group)
을 갖는 이미다졸염과 음이온으로서 말레산 및 프탈산의 혼합물 1.9∼50중량%로된 용질;을 포함하여 이루어지며,A solute made up of 1.9-50% by weight of a mixture of maleic acid and phthalic acid as an anionazole salt having an anion;
여기서 상기 말레산의 이미다졸염과 프탈산의 이미다졸염의 중량비는 90:10∼20:80인, 저압용 알루미늄 전해 커패시터의 전해액이 제공된다.The weight ratio of the imidazole salt of maleic acid and the imidazole salt of phthalic acid is 90: 10-20: 80, The electrolyte solution of the low pressure aluminum electrolytic capacitor is provided here.
본 발명의 제2견지에 의하면,According to the second aspect of the present invention,
γ-부티로락톤 50∼98.1중량%로된 용매; 및solvent of 50-98.1% by weight of γ-butyrolactone; And
양이온으로서 하기식 1Formula 1 as the cation
[화학식 1][Formula 1]
(상기 식에서, R1은 C1-C10의 하이드로카본기 또는 시안기, C1-C5의 시아노알킬기이며, R2는 C1-C10의 하이드로카본기이다)(Wherein R 1 is a C 1 -C 10 hydrocarbon or cyan group, C 1 -C 5 cyanoalkyl group, and R 2 is a C 1 -C 10 hydrocarbon group)
을 갖는 이미다졸염과 음이온으로서 말레산 및 프탈산의 혼합물 1.9∼50중량%로된 용질;을 포함하여 이루어지며,A solute made up of 1.9-50% by weight of a mixture of maleic acid and phthalic acid as an anionazole salt having an anion;
여기서 상기 말레산의 이미다졸염과 프탈산의 이미다졸염의 중량비는 90:10∼20:80인, 저압용 알루미늄 전해 커패시터의 전해액을 실온에서 60∼120분동안 교반함을 특징으로 하는 저압용 알루미늄 커패시터의 전해액을 제조하는 방법이 제공된다.Wherein the weight ratio of the imidazole salt of maleic acid to the imidazole salt of phthalic acid is 90:10 to 20:80, and the low pressure aluminum capacitor is characterized in that the electrolytic solution of the low pressure aluminum electrolytic capacitor is stirred at room temperature for 60 to 120 minutes. A method for producing an electrolyte solution is provided.
이하, 본 발명을 상세히 설명한다.Hereinafter, the present invention will be described in detail.
본 발명은 γ-부티로락톤(용매), 이미다졸염과 말레산 및 프탈산의 혼합물(용질)로 구성되는 전해액에 관한 것으로, 다음에서는 이들의 함유량에 대한 한정 이유를 설명한다.The present invention relates to an electrolytic solution composed of γ-butyrolactone (solvent), imidazole salt, and a mixture (solute) of maleic acid and phthalic acid. The reason for limitation on these contents will be described below.
상기 γ-부티로락톤은 전해질을 용해시키고 특성을 좌우하는 역할을 하는 것으로, 그 함량이 50중량%미만인 경우에는 용해도의 저하로 석출이 발생하고, 98.1중량%를 초과하는 경우에는 비저항이 상승되어 신뢰성이 불량하다. 따라서, 본 발명에서는 γ-부티로락톤의 함량을 50∼98.1중량%로 한정함이 바람직하다.The γ-butyrolactone plays a role of dissolving the electrolyte and influencing the characteristics. If the content is less than 50% by weight, precipitation occurs due to a decrease in solubility, and when the content exceeds 98.1% by weight, the specific resistance is increased. Poor reliability Therefore, in the present invention, it is preferable to limit the content of γ-butyrolactone to 50 to 98.1% by weight.
상기 이미다졸염과 말레산 및 프탈산은 주전해질로서 각각 양이온과 음이온 역할을 하는 것으로, 양이온으로서는 하기식을 갖는 이미다졸염이 바람직하며,음이온으로는 말레산 및 프탈산을 사용할 수 있다.The imidazole salt, maleic acid, and phthalic acid each play a role of a cation and an anion as the main electrolyte, and an imidazole salt having the following formula is preferable as the cation, and maleic acid and phthalic acid may be used as the anion.
[화학식 1][Formula 1]
(상기 식에서, R1은 C1-C10의 하이드로카본기 또는 시안기, C1-C5의 시아노알킬기이며, R2는 C1-C10의 하이드로카본기이다)(Wherein R 1 is a C 1 -C 10 hydrocarbon or cyan group, C 1 -C 5 cyanoalkyl group, and R 2 is a C 1 -C 10 hydrocarbon group)
보다 바람직한 양이온으로는 1-메틸이미다졸, 2-메틸이미다졸, 2-에틸-4-메틸이미다졸, 1-시아노메틸이미다졸, 1-시아노에틸이미다졸, 1-시아노에틸-2-메틸이미다졸, 1-시아노에틸-2-에틸-4-메틸이미다졸, 1-시아노에틸-2-메틸이미다졸-트리멜리테이트, 1-시아노에틸-2-에틸-4-메틸이미다졸-트리멜리테이트등을 들 수 있다.More preferred cations include 1-methylimidazole, 2-methylimidazole, 2-ethyl-4-methylimidazole, 1-cyanomethylimidazole, 1-cyanoethylimidazole, 1- Cyanoethyl-2-methylimidazole, 1-cyanoethyl-2-ethyl-4-methylimidazole, 1-cyanoethyl-2-methylimidazole-trimelitate, 1-cyanoethyl 2-ethyl-4-methylimidazole- trimellitate etc. are mentioned.
상기 양이온과 음이온으로된 용질 함량이 1.9중량%미만인 경우에는 비저항이 저하되고, 용질 함량이 50중량%를 초과하는 경우에는 내전압이 저하되고 용해도의 저하로 석출이 발생하는 문제점이 있다. 따라서, 본 발명에서는 용질 함량을 1.9∼50중량%로 한정함이 바람직하다.When the solute content of the cation and the anion is less than 1.9% by weight, the specific resistance is lowered, and when the solute content exceeds 50% by weight, the withstand voltage is lowered and precipitation occurs due to a decrease in solubility. Therefore, in the present invention, it is preferable to limit the solute content to 1.9 to 50% by weight.
또한 상기 말레산의 이미다졸염과 프탈산의 이미다졸염의 혼합비는 중량비로 90:10∼20:80, 보다 바람직하게는 60:40∼40:60, 이 되도록 조절하는 것이 ESR 및 SPV측면, 결과적으로 전도도 개선 측면에서 볼때 바람직하다.In addition, the mixing ratio of the imidazole salt of maleic acid and the imidazole salt of phthalic acid is 90:10 to 20:80, more preferably 60:40 to 40:60, in terms of weight ratio. It is preferable from the viewpoint of improving conductivity.
또한, 본 발명은 상기과 같은 함량으로 구성되는 전해액을 제조하는 방법에 관한 것으로, 다음에서 이를 보다 상세히 설명한다.In addition, the present invention relates to a method for preparing an electrolytic solution having the above content, which will be described in more detail below.
본 발명에서는 상기와 같은 함량을 갖는 γ-부티로락톤, 에 상기한 바와 같은 함량을 갖는 이미다졸염과 말레산 및 프탈산의 혼합물을 투입하여 실온에서 60∼120분 동안 교반한다.In the present invention, a mixture of imidazole salt having a content as described above with maleic acid and phthalic acid is added to γ-butyrolactone having the above content, followed by stirring at room temperature for 60 to 120 minutes.
이때 교반시간이 60분에 미치지 못하면, 용해가 완전히 행해지지 않아서 특성치가 제대로 발휘되지 않고, 상기 교반시간이 120분을 초과하면, 비저항이 상승하는 문제점이 있어 바람직하지 않다.At this time, if the stirring time is less than 60 minutes, dissolution is not performed completely, the characteristic value is not properly exhibited, and if the stirring time exceeds 120 minutes, there is a problem that the specific resistance increases, which is not preferable.
이하, 실시예를 통하여 본 발명을 보다 상세히 설명한다.Hereinafter, the present invention will be described in more detail with reference to Examples.
실시예 1Example 1
γ-부티로락톤에 말레산의 1-메틸이미다졸염 및 프탈산의 1-메틸이미다졸염이 55:45중량비인 용질을 첨가하고 실온에서 90분간 교반시켜 전해액을 제조하였다. 또한 시판되는 γ-부티로락톤에말레산의 1-메틸이미다졸염 및 기타 첨가제로 이루어진 전해액과 프탈산의 1-메틸이미다졸염 및 기타 첨가제로 이루어진 전해액을 각각 구입하고 이들을 종래예 1 및 2로 하였다.To γ-butyrolactone, a solute having a 55:45 weight ratio of 1-methylimidazole salt of maleic acid and 1-methylimidazole salt of phthalic acid was added and stirred at room temperature for 90 minutes to prepare an electrolyte solution. In addition, a commercially available electrolyte solution consisting of 1-methylimidazole salt of γ-butyrolactone maleic acid and other additives and an electrolyte solution consisting of 1-methylimidazole salt of phthalic acid and other additives were obtained, and these were converted into conventional examples 1 and 2, respectively. It was.
나아가 비교를 위하여 γ-부티로락톤에 말레산의 1-메틸이미다졸염을 첨가한 전해액을 비교예 1로 그리고 프탈산의 1-메틸이미다졸염을 첨가한 전해액을 비교예 2로 나타내었다.Further, for comparison, an electrolyte solution in which 1-methylimidazole salt of maleic acid was added to γ-butyrolactone was shown as Comparative Example 1, and an electrolyte solution in which 1-methylimidazole salt of phthalic acid was added as Comparative Example 2.
그 첨가량은 하기표 1과 같았으며, 상기 제조된 전해액의 비저항(Ω·cm/25℃), 내전압, pH를 측정하여 하기 표1에 나타내었다.The addition amount was as shown in Table 1, and the specific resistance (저항 · cm / 25 ℃), withstand voltage, pH of the prepared electrolyte was measured and shown in Table 1 below.
하기표 1에서 γ-부티로락톤은 'GBL'로, 말레산은 'MA'로, 프탈산은 'PA'로, 'IZ'는 이미다졸염으로 각각 표기하였으며, 트리톤-X는 옥틸페녹시 에틸렌옥사이드를 의미하는 것으로 첨가제이다.In Table 1, γ-butyrolactone is expressed as 'GBL', maleic acid as 'MA', phthalic acid as 'PA', and 'IZ' as imidazole salts, and triton-X is octylphenoxy ethylene oxide. It means an additive.
상기 표1에서 알 수 있는 바와 같이, 본 발명의 조건을 만족하는발명예(1,2)는 전해액 특성이 높게 나타나며, 이에 반하여 비교예(1,2)는 본 발명과 유사한 성분조성을 갖기만 하지만 말레산과 프탈산의 혼합물이 아닌 각각을 사용하므로 그 전해액 특성이 모두 뒤떨어짐을 확인할 수 있었다.As can be seen in Table 1, the invention examples (1,2) satisfying the conditions of the present invention is characterized by high electrolyte solution, whereas Comparative Example (1,2) has a similar composition to the present invention, but Since each of the mixtures of maleic acid and phthalic acid was used, the electrolyte properties were all inferior.
따라서 본 실시예에서는 GBL과 말레산-아미다졸염과 프탈산-이미다졸염을 혼합하여 사용하는 것이 바람직함을 확인할 수 있었다.Therefore, in the present embodiment, it was confirmed that it is preferable to use a mixture of GBL, maleic acid-imidazole salt, and phthalic acid-imidazole salt.
실시예 2Example 2
본 실시예에서는 GBL과 말레산-아미다졸염과 프탈산-이미다졸염의 적정 혼합비를 결정하고자 한다. 하기표에 나타낸 γ-부티로락톤과 말레산의 이미다졸염 및 프탈산의 이미다졸염의 함량비로 전해액을 투입하고 실온에서 90분간 교반시켜 전해액을 제조하였다.In the present embodiment, an appropriate mixing ratio of GBL, maleic acid-imidazole salt and phthalic acid-imidazole salt is determined. Electrolyte was added to the content ratio of the imidazole salt of (gamma) -butyrolactone, maleic acid, and the imidazole salt of phthalic acid shown in the following table | surface, and it stirred for 90 minutes at room temperature, and prepared electrolyte solution.
제조된 전해액의 비저항(Ω·cm/25℃), 내전압, pH를 측정하고 하기표 2에 나타내었다.The specific resistance (Ω · cm / 25 ° C.), breakdown voltage, and pH of the prepared electrolyte were measured and shown in Table 2 below.
상기표에서 알 수 있는 바와 같이, GBL:용질(전해질)의 함량비가 50:50인 경우(발명예 7) 전도도는 높을지 모르나 내전압특성이 떨어지고 용해력이 나쁘며, 또한 GBL:용질(전해액)의 함량비가 98.1:1.9인 경우(발명예 3) 커패시터로 사용하기에 너무 낮은 전도도를 나타내므로, GBL:용질(전해액)의 적정함량비는 98.1:1.9∼50:50임을 확인할 수 있었다.As can be seen from the above table, when the content ratio of GBL: solute (electrolyte) is 50:50 (Inventive Example 7), the conductivity may be high, but the withstand voltage characteristics are poor, the solubility is poor, and also the content of GBL: solute (electrolyte) When the ratio was 98.1: 1.9 (Inventive Example 3), the conductivity was too low to be used as a capacitor. Therefore, the proper content ratio of GBL: solute (electrolyte) was found to be 98.1: 1.9-50: 50.
실시예 3Example 3
본 실시예에서는 실시예 2에서 결정한 GBL과 MA-IZ/PA-IZ간의 적정혼합비내에서 MA-IZ와 PA-IZ간 혼합비를 결정하고자 한다.In this embodiment, the mixing ratio between MA-IZ and PA-IZ is determined within the proper mixing ratio between GBL and MA-IZ / PA-IZ determined in Example 2.
GBL과 MA-IZ/PA-IZ을 75:25중량비로 첨가하고, 여기서 상기 MA-IZ/PA-IZ의 함량비를 하기표에 나타낸 량으로 변화시킨 것을 제외하고는 실시예 2에서와 동일한 실험을 반복하고 그 결과를 하기표 3에 나타내었다.The same experiment as in Example 2 was added except that GBL and MA-IZ / PA-IZ were added in a 75:25 weight ratio, where the content ratio of MA-IZ / PA-IZ was changed to the amount shown in the following table. Was repeated and the results are shown in Table 3.
상기 표3에서 보듯이, MA-IZ와 PA-IZ의 비율이 10:90인 경우(비교예 3)에는 프탈산의 1-메틸이미다졸염을 사용한 경우(비교예 2)보다 그 특성값이 떨어짐을 확인할 수 있었으며, MA-IZ와 PA-IZ의 비율이 90:10인 경우(발명예 8)에는 말레산의 1-메틸이미다졸염을 사용한 경우(비교예 1)와 그 특성값에 있어서 개선효과를 찾을 수 없는 바, 결과적으로 MA-IZ와 PA-IZ의 함량비는 90:10∼20:80범위내인 것이 바람직함을 알 수 있다.As shown in Table 3, when the ratio of MA-IZ and PA-IZ is 10:90 (Comparative Example 3), the characteristic value is lower than that of 1-methylimidazole salt of phthalic acid (Comparative Example 2). In the case where the ratio of MA-IZ and PA-IZ is 90:10 (Inventive Example 8), 1-methylimidazole salt of maleic acid was used (Comparative Example 1) and its characteristics were improved. Since no effect was found, it can be seen that the content ratio of MA-IZ and PA-IZ is preferably in the range of 90:10 to 20:80.
상술한 바와같이, 본 발명에 의하면, 정격전압이 160WV이하인 저압용 알루미늄 전해 커패시터에 사용되는 전해액의 성분조성을 적절히 제어하므로서, 전도도와 내전압이 개선되어 제품화시 손실각 특성 및 등가직류저항(ESR)이 향상되는 저압용 알루미늄 커패시터의 전해액이 제공되는 효과가 있다.As described above, according to the present invention, by appropriately controlling the composition of the electrolyte used in the low-voltage aluminum electrolytic capacitor having a rated voltage of 160WV or less, the conductivity and withstand voltage are improved, so that the loss angle characteristics and equivalent DC resistance (ESR) during commercialization are improved. There is an effect that the electrolyte of the low-voltage aluminum capacitor is improved.
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| JPH0945588A (en) * | 1995-08-02 | 1997-02-14 | Toyama Yakuhin Kogyo Kk | Electrolyte for driving electrolytic capacitor |
| JPH09148194A (en) * | 1995-11-21 | 1997-06-06 | Mitsubishi Chem Corp | Electrolyte for electrolytic capacitor drive use |
| JPH10256093A (en) * | 1997-03-13 | 1998-09-25 | Marcon Electron Co Ltd | Driving electrolyte for electrolytic capacitor |
| KR19990063286A (en) * | 1997-12-18 | 1999-07-26 | 도키와 히코요시 | Electrolytes for Electrolytic Capacitors and Electrolytic Capacitors Having the Same |
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| JPH0945588A (en) * | 1995-08-02 | 1997-02-14 | Toyama Yakuhin Kogyo Kk | Electrolyte for driving electrolytic capacitor |
| JPH09148194A (en) * | 1995-11-21 | 1997-06-06 | Mitsubishi Chem Corp | Electrolyte for electrolytic capacitor drive use |
| JPH10256093A (en) * | 1997-03-13 | 1998-09-25 | Marcon Electron Co Ltd | Driving electrolyte for electrolytic capacitor |
| KR19990063286A (en) * | 1997-12-18 | 1999-07-26 | 도키와 히코요시 | Electrolytes for Electrolytic Capacitors and Electrolytic Capacitors Having the Same |
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