JPH0950944A - Organic solvent-based electrolyte solution - Google Patents
Organic solvent-based electrolyte solutionInfo
- Publication number
- JPH0950944A JPH0950944A JP7222534A JP22253495A JPH0950944A JP H0950944 A JPH0950944 A JP H0950944A JP 7222534 A JP7222534 A JP 7222534A JP 22253495 A JP22253495 A JP 22253495A JP H0950944 A JPH0950944 A JP H0950944A
- Authority
- JP
- Japan
- Prior art keywords
- organic solvent
- lactone
- electrolytic solution
- hydrocarbon group
- tetraethylammonium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/13—Energy storage using capacitors
Landscapes
- Furan Compounds (AREA)
- Pyrane Compounds (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
- Primary Cells (AREA)
- Secondary Cells (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電位窓が広く、比
誘電率の高い有機溶媒系電解液に関する。TECHNICAL FIELD The present invention relates to an organic solvent-based electrolytic solution having a wide potential window and a high relative dielectric constant.
【０００２】[0002]
【従来の技術】従来から用いられている電解液には水系
電解液と有機溶媒系電解液の２種類があるが、一般に有
機溶媒系電解液の方が分解電圧が高く、主として有機溶
媒系電解液が用いられている。2. Description of the Related Art There are two types of electrolytes that have hitherto been used: an aqueous electrolyte and an organic solvent electrolyte. Generally, an organic solvent electrolyte has a higher decomposition voltage and is mainly used in an organic solvent electrolyte. Liquid is used.
【０００３】有機溶媒系電解液の溶媒としては、プロピ
レンカーボネート、γ−ブチロラクトン、アセトニトリ
ル、ジメチルホルムアミドなどやこれらの混合液が用い
られている。これらは比誘電率が大きく、電位窓が広い
溶媒である。比誘電率が大きい電解液を用いるほど、キ
ャパシター、コンデンサーなどでは容量が大きくなる。
電位窓とは、酸化限界電位と還元限界電位の差であり、
これが広い溶媒を用いた電解液は耐電圧が高い。キャパ
シターではエネルギー密度が耐電圧の二乗に比例するな
ど電解液の特性に電位窓の広さは大きく影響する。As the solvent of the organic solvent type electrolytic solution, propylene carbonate, γ-butyrolactone, acetonitrile, dimethylformamide and the like or a mixture thereof are used. These are solvents having a large relative permittivity and a wide potential window. The larger the relative dielectric constant of the electrolytic solution, the larger the capacity of the capacitor or the capacitor.
The potential window is the difference between the oxidation limit potential and the reduction limit potential,
An electrolytic solution using a solvent having a wide range has a high withstand voltage. In capacitors, the size of the potential window greatly affects the characteristics of the electrolyte, such as the energy density being proportional to the square of the withstand voltage.
【０００４】しかし、これらの溶媒でも、実用上の電位
窓が最も広いプロピレンカーボネートでも酸化限界電圧
が約３．４Ｖ、還元限界電圧が−２．８Ｖであり、電位
窓は約６．２Ｖである。γ−ブチロラクトンは酸化限界
電圧が約４．８Ｖ、還元限界電圧が約−２．７Ｖであ
り、電位窓は約７．５Ｖであるが、ラクトン環の開環に
起因すると思われる電気特性の影響で、実用上の酸化限
界電圧は約２．０Ｖであり、実用上の電位窓は約４．７
Ｖでしかない。However, even with these solvents, even in the case of propylene carbonate having the widest practical potential window, the oxidation limit voltage is about 3.4 V, the reduction limit voltage is -2.8 V, and the potential window is about 6.2 V. . γ-butyrolactone has an oxidation limit voltage of about 4.8 V, a reduction limit voltage of about -2.7 V, and a potential window of about 7.5 V, but the influence of electrical properties that are considered to be due to ring opening of the lactone ring. The practical oxidation limit voltage is about 2.0 V, and the practical potential window is about 4.7.
Only V.
【０００５】技術の進歩に伴い、より耐電圧の高い電解
液が求められるようになったため、より電位窓の広い溶
媒を用いた有機溶媒系電解液の開発が求められている。With the progress of technology, an electrolytic solution having a higher withstand voltage has come to be required, and therefore, the development of an organic solvent type electrolytic solution using a solvent having a wider potential window is required.
【０００６】[0006]
【発明が解決しようとする課題】本発明者らは、より耐
電圧の高い電解液の開発を目的に鋭意努力の結果、電解
液溶媒として使用されていなかった炭化水素基置換−δ
−ラクトンの電位窓が広く、これを含有する電解液が耐
電圧が高いことを見い出し、本発明を完成させるにいた
った。DISCLOSURE OF THE INVENTION The present inventors have made earnest efforts for the purpose of developing an electrolytic solution having a higher withstand voltage, and as a result, a hydrocarbon group substitution -δ which has not been used as a solvent for an electrolytic solution.
-The lactone potential window was wide, and it was found that the electrolytic solution containing the lactone has a high withstand voltage, leading to the completion of the present invention.
【０００７】[0007]
【課題を解決する手段】かくして本発明によれば、電解
質を有機溶媒に溶解した有機溶媒系電解液であって、有
機溶媒中に炭化水素基置換−δ−ラクトン類を含有する
ことを特徴とする有機溶媒系電解液が提供される。According to the present invention, there is provided an organic solvent-based electrolytic solution in which an electrolyte is dissolved in an organic solvent, wherein the organic solvent contains a hydrocarbon group-substituted -δ-lactone. An organic solvent-based electrolyte solution is provided.
【０００８】[0008]
（炭化水素基置換−δ−ラクトン）本発明に用いる有機
溶媒系電解液は、溶媒中に炭化水素基置換−δ−ラクト
ンを含有するものである。(Hydrocarbon Group Substitution-δ-Lactone) The organic solvent-based electrolytic solution used in the present invention contains a hydrocarbon group substitution-δ-lactone in the solvent.
【０００９】炭化水素基置換−δ−ラクトンは、通称δ
−ラクトン（または、δ−バレロラクトン、テトラヒド
ロ−２Ｈ−ピラン−２−オン）の３位、４位、５位、ま
たは６位の炭素に炭化水素置換基を有する化合物であっ
て、炭化水素置換基としては、好ましくは３以上、より
好ましくは５以上、好ましくは７以下の炭素数を有する
ものである。炭化水素基の炭素数が少なすぎると、炭素
数が多いほど電位窓が広くなる傾向がある。一方、炭素
数が多すぎると、比誘電率が低下し、電解液として機能
しにくくなる。The hydrocarbon group-substituted -δ-lactone is commonly referred to as δ
A compound having a hydrocarbon substituent at the 3-, 4-, 5-, or 6-position carbon of lactone (or δ-valerolactone, tetrahydro-2H-pyran-2-one), The group preferably has 3 or more, more preferably 5 or more, and preferably 7 or less carbon atoms. When the number of carbon atoms in the hydrocarbon group is too small, the potential window tends to become wider as the number of carbon atoms increases. On the other hand, if the carbon number is too large, the relative dielectric constant decreases, and it becomes difficult to function as an electrolytic solution.
【００１０】また、炭化水素基置換−δ−ラクトンとし
ては、製造が容易な点で、３位、４位、または６位の炭
素に置換基を有するものが好ましく、特に６位に置換基
を有するものが好ましい。比誘電率の点で６位の炭素に
置換基を有するアルキル置換−δ−ラクトンが特に好ま
しい。複数種の炭化水素基置換−δ−ラクトンを併用す
る場合は、炭素数３〜７、好ましくは５〜７の置換基を
６位に有するアルキル置換−δ−ラクトンを全炭化水素
基置換−δ−ラクトン中の５０重量％以上であることが
好ましく、７０重量％以上であることがより好ましく、
９０重量％以上であることが特に好ましく、１００重量
％以下である。通常は、炭化水素基置換−δ−ラクトン
として６位にアルキル基を有するアルキル置換−δ−ラ
クトンのみを使用する。この場合、アルキル基は直鎖の
もの、分枝を有するもの、環状のもののいずれでもよい
が、直鎖のアルキル基が製造が容易で比誘電率が高い。
具体的には、δ−オクチルラクトン（または６−プロピ
ル−テトラヒドロ−２Ｈ−ピラン−２−オン）、δ−ノ
ニルラクトン（または６−ブチル−テトラヒドロ−２Ｈ
−ピラン−２−オン）、δ−デカラクトン（または６−
ペンチル−テトラヒドロ−２Ｈ−ピラン−２−オン）、
δ−ウンデカラクトン（または６−ヘキシル−テトラヒ
ドロ−２Ｈ−ピラン−２−オン）、δ−ドデカラクトン
（または６−ヘプチル−テトラヒドロ−２Ｈ−ピラン−
２−オン）などが例示され、特にδ−デカラクトン、δ
−ウンデカラクトン、δ−ドデカラクトンが電位窓の広
さ、比誘電率の高さ、沸点の高さなどの点で好ましく、
通常は、炭化水素基置換−δ−ラクトンとして、これら
を単独、またはこれらの混合液を使用する。Further, as the hydrocarbon group-substituted-δ-lactone, those having a substituent at the carbon at the 3-position, 4-position or 6-position are preferable from the viewpoint of easy production, and particularly the substituent at the 6-position is preferable. Those having are preferred. Alkyl-substituted-δ-lactone having a substituent at the 6-position carbon is particularly preferable in terms of relative dielectric constant. When a plurality of kinds of hydrocarbon group-substituted-δ-lactone are used in combination, an alkyl-substituted-δ-lactone having a substituent having 3 to 7 carbon atoms, preferably 5 to 7 carbon atoms at the 6-position is a total hydrocarbon group-substituted-δ. -It is preferably 50% by weight or more, more preferably 70% by weight or more, in the lactone,
It is particularly preferably 90% by weight or more, and 100% by weight or less. Usually, only the alkyl-substituted-δ-lactone having an alkyl group at the 6-position is used as the hydrocarbon-substituted-δ-lactone. In this case, the alkyl group may be linear, branched, or cyclic, but a linear alkyl group is easy to manufacture and has a high dielectric constant.
Specifically, δ-octyl lactone (or 6-propyl-tetrahydro-2H-pyran-2-one), δ-nonyl lactone (or 6-butyl-tetrahydro-2H).
-Pyran-2-one), delta-decalactone (or 6-
Pentyl-tetrahydro-2H-pyran-2-one),
δ-undecalactone (or 6-hexyl-tetrahydro-2H-pyran-2-one), δ-dodecalactone (or 6-heptyl-tetrahydro-2H-pyran-
2-one) and the like, and particularly δ-decalactone, δ
-Undecalactone and δ-dodecalactone are preferable in terms of the width of the potential window, the high dielectric constant, the high boiling point, and the like,
Usually, these are used alone or a mixture thereof is used as the hydrocarbon group-substituted-δ-lactone.
【００１１】（電解液溶媒）本発明の電解液の溶媒中の
炭化水素基置換−δ−ラクトンの量は１０重量％以上、
好ましくは３０重量％以上、より好ましくは５０重量％
以上、特に好ましくは８０重量％以上、１００重量％以
下である。炭化水素基置換−δ−ラクトンの量が少なす
ぎると、本願発明の効果が十分に発揮されない。炭化水
素基置換−δ−ラクトン以外の溶媒も併用する場合、そ
れらの溶媒は用いる炭化水素基置換−δ−ラクトンと相
溶性を有し、電解液としての機能を阻害するものでなけ
れば、特に限定されない。電解液として好ましく機能す
るように、併用する電解液としては、比誘電率が３０以
上のものが好ましく、４０以上のものがより好ましい。
このような溶媒としては、例えば、一般に電解液溶媒と
して用いられているエチレンカーボネート、プロピレン
カーボネート、γ−ブチロラクトン、アセトニトリル、
ジメチルホルムアミドなどやこれらの混合液が例示され
る。(Electrolytic Solution Solvent) The amount of hydrocarbon group-substituted-δ-lactone in the solvent of the electrolytic solution of the present invention is 10% by weight or more,
Preferably 30% by weight or more, more preferably 50% by weight
More preferably, it is 80% by weight or more and 100% by weight or less. If the amount of the hydrocarbon group-substituted -δ-lactone is too small, the effects of the present invention will not be sufficiently exhibited. When a solvent other than the hydrocarbon group-substituted-δ-lactone is also used in combination, those solvents are compatible with the hydrocarbon group-substituted-δ-lactone to be used, and unless they impair the function as an electrolytic solution, Not limited. In order to function preferably as an electrolytic solution, the electrolytic solution used in combination preferably has a relative dielectric constant of 30 or more, more preferably 40 or more.
Examples of such a solvent include, for example, ethylene carbonate, propylene carbonate, γ-butyrolactone, acetonitrile, which are generally used as electrolyte solvent.
Examples thereof include dimethylformamide and the like, and a mixed solution thereof.
【００１２】（電解液溶質）有機溶媒系電解液の溶質
は、特に限定されず、通常の有機溶媒系電解液の溶媒と
して使用されるもの、具体的には、アルカリ金属、アル
カリ土類金属、アンモニウム、またはテトラアルキルア
ンモニウムなどの、過塩素酸塩、六フッ化リン酸塩、四
フッ化ホウ酸塩、六フッ化ヒ素酸塩、四塩化アルミン酸
塩、またはトリフルオロアルカンスルホン酸塩などが例
示される。具体的には、過塩素酸テトラエチルアンモニ
ウム、過塩素酸リチウム、四フッ化ホウ酸テトラエチル
アンモニウム、六フッ化ホウ酸テトラエチルアンモニウ
ムなどが例示される。(Solute of Electrolyte Solution) The solute of the organic solvent-based electrolyte solution is not particularly limited, and it is used as a solvent of the usual organic solvent-based electrolyte solution, specifically, alkali metal, alkaline earth metal, Perchlorate, hexafluorophosphate, tetrafluoroborate, hexafluoroarsenate, tetrachloroaluminate, or trifluoroalkanesulfonate such as ammonium or tetraalkylammonium It is illustrated. Specific examples include tetraethylammonium perchlorate, lithium perchlorate, tetraethylammonium tetrafluoroborate, and tetraethylammonium hexafluoroborate.
【００１３】（有機溶媒系電解液）本発明の有機溶媒系
電解液の溶質濃度は、好ましくは０．０１ｍｏｌ／ｌ以
上、より好ましくは０．０５ｍｏｌ／ｌ以上、好ましく
は３ｍｏｌ／ｌ以下、より好ましくは１．５ｍｏｌ／ｌ
以下である。溶質濃度が低すぎると電荷を移動させるイ
オン量が少ないために電解液としての機能が不十分にな
る。溶質濃度が高すぎると電解液の粘度が高くなるため
イオンが移動しにくくなり、やはり、電解液としての機
能が不十分になる。(Organic solvent type electrolytic solution) The solute concentration of the organic solvent type electrolytic solution of the present invention is preferably 0.01 mol / l or more, more preferably 0.05 mol / l or more, preferably 3 mol / l or less, Preferably 1.5 mol / l
It is the following. If the solute concentration is too low, the amount of ions that move charges is small, and the function as an electrolyte becomes insufficient. If the solute concentration is too high, the viscosity of the electrolytic solution becomes high, and it becomes difficult for the ions to move, and again the function as the electrolytic solution becomes insufficient.
【００１４】本発明の有機溶媒系電解液は、耐電圧が高
くなる。例えば、本発明の有機溶媒系電解液を用いた電
気二重層キャパシターでは、電解液の耐電圧が高いほ
ど、エネルギー密度を高くすることができる。The organic solvent type electrolytic solution of the present invention has a high withstand voltage. For example, in the electric double layer capacitor using the organic solvent-based electrolytic solution of the present invention, the higher the withstand voltage of the electrolytic solution, the higher the energy density can be.
【００１５】（用途）本発明の有機溶媒系電解液は、リ
チウムイオン二次電池などの各種電池、電気二重層キャ
パシター、コンデンサーなどの電解液として有用であ
る。(Use) The organic solvent-based electrolytic solution of the present invention is useful as an electrolytic solution for various batteries such as lithium-ion secondary batteries, electric double layer capacitors, and capacitors.
【００１６】（態様）本発明の態様としては、（１）
電解質を有機溶媒に溶解した有機溶媒系電解液であっ
て、有機溶媒中に炭化水素基置換−δ−ラクトンを含有
することを特徴とする有機溶媒系電解液、（２） 溶媒
中の炭化水素基置換−δ−ラクトンの量が１０〜１００
重量％である（１）記載の有機溶媒系電解液、（３）
炭化水素基置換−δ−ラクトンの置換基の炭素数が２〜
７である（１）〜（２）記載の有機溶媒系電解液、
（４） 炭化水素基置換−δ−ラクトンの置換基の炭素
数が５〜７である（１）〜（３）記載の有機溶媒系電解
液、（５） 溶媒中に炭化水素基置換−δ−ラクトンと
して、δ−デカラクトン、δ−ウンデカラクトン、及び
δ−ドデカラクトンから選ばれた単独、またはこれらか
ら選ばれた２種以上のものの混合物のみを含有する
（１）〜（４）記載の有機溶媒系電解液、（６） 溶質
がアルカリ金属、アルカリ土類金属、アンモニウム、ま
たはテトラアルキルアンモニウムの、過塩素酸塩、六フ
ッ化リン酸塩、四フッ化ホウ酸塩、六フッ化ヒ素酸塩、
四塩化アルミン酸塩、またはトリフルオロアルカンスル
ホン酸塩である（１）〜（５）記載の有機溶媒系電解
液、（７） 溶質が過塩素酸テトラエチルアンモニウ
ム、過塩素酸リチウム、四フッ化ホウ酸テトラエチルア
ンモニウム、または六フッ化ホウ酸テトラエチルアンモ
ニウムである（１）〜（６）記載の有機溶媒系電解液、
（８） 溶質濃度が０．０１〜３ｍｏｌ／ｌである
（１）〜（７）記載の有機溶媒系電解液、（９）
（１）〜（８）記載の電解液を用いた電気二重層キャパ
シター、（１０） （１）〜（８）記載の電解液を用い
たコンデンサー、（１１） （１）〜（８）記載の電解
液を用いた二次電池、（１２） リチウムイオン二次電
池である（１１）記載の二次電池、などが例示される。(Aspect) As an aspect of the present invention, (1)
An organic solvent-based electrolytic solution in which an electrolyte is dissolved in an organic solvent, wherein the organic solvent contains a hydrocarbon group-substituted -δ-lactone, (2) hydrocarbon in the solvent The amount of the group-substituted δ-lactone is 10 to 100.
(3) The organic solvent-based electrolyte solution according to (1), which is% by weight.
Substitution of hydrocarbon group -δ-lactone has 2 to 8 carbon atoms
7, the organic solvent-based electrolytic solution according to (1) to (2),
(4) Hydrocarbon group-substituted-δ-lactone, wherein the substituent has 5 to 7 carbon atoms, the organic solvent-based electrolytic solution according to (1) to (3), (5) the hydrocarbon group-substituted-δ in the solvent. -The lactone contains only one selected from δ-decalactone, δ-undecalactone, and δ-dodecalactone, or only a mixture of two or more selected from these (1) to (4) Organic solvent-based electrolyte, (6) Perchlorate, hexafluorophosphate, tetrafluoroborate, arsenic hexafluoride whose solute is alkali metal, alkaline earth metal, ammonium or tetraalkylammonium Acid salt,
(1) to (5) the organic solvent-based electrolyte solution, which is a tetrachloroaluminate or a trifluoroalkanesulfonate, (7) the solute is tetraethylammonium perchlorate, lithium perchlorate, and tetrafluoroborate. (1) to (6), wherein the organic solvent-based electrolyte is tetraethylammonium acid tetraethylammonium or tetraethylammonium hexafluoroborate,
(8) The organic solvent-based electrolytic solution according to (1) to (7), wherein the solute concentration is 0.01 to 3 mol / l.
(1) to (8) the electric double layer capacitor using the electrolytic solution, (10) (1) to (8) the electrolytic solution using the capacitor, (11) (1) to (8) described Examples include a secondary battery using an electrolytic solution, (12) a secondary battery according to (11), which is a lithium ion secondary battery, and the like.
【００１７】[0017]
【実施例】以下に参考例、実施例、比較例を挙げて本発
明を具体的に説明する。EXAMPLES The present invention will be specifically described below with reference to Reference Examples, Examples and Comparative Examples.
【００１８】実施例１ 過塩素酸リチウムをδ−デカラクトンに濃度０．１ｍｏ
ｌ／ｌになるように溶解して、本発明の電解液を調整し
た。Example 1 Lithium perchlorate was added to δ-decalactone at a concentration of 0.1 mo.
The electrolytic solution of the present invention was prepared by dissolving so as to be 1 / l.
【００１９】この電解液を用い、参照電極として銀・塩
化銀電極、対極として白金電極、作用極としてグラファ
イト電極を用いて、窒素パージしたグローブ内、２７℃
で、電圧を０．５Ｖ／分で変化させて、電流量を測定
し、電流量の変化から測定したδ−デカラクトンの酸化
限界電圧、還元限界電圧を測定し、電位窓を求めた。結
果を表１に示す。Using this electrolyte, a silver / silver chloride electrode as a reference electrode, a platinum electrode as a counter electrode, and a graphite electrode as a working electrode were used, and a nitrogen-purged glove was used at 27 ° C.
Then, the voltage was changed at 0.5 V / min to measure the current amount, and the oxidation limit voltage and reduction limit voltage of δ-decalactone measured from the change in the current amount were measured to obtain the potential window. The results are shown in Table 1.
【００２０】また、プレシジョンＬＣＲメーター（ヒュ
ーレットパッカード社製、ＨＰ−４２８４Ａ型）、液体
測定用電極（安藤電気株式会社製、ＬＥ−２２型クロム
メッキ品）を用い、主電極として５０ｍｍφ相当のガー
ド電極付きのものを用い、対向電極との間隔を１．００
ｍｍ、測定周波数１ｋＨｚ、測定電圧１．００１Ｖ、室
温２１〜２３℃、湿度５５〜６５％ＲＨで測定したδ−
デカラクトンの比誘電率を測定した。結果を表１に示
す。A precision LCR meter (HP-4284A type manufactured by Hewlett-Packard Co.) and a liquid measuring electrode (LE-22 type chrome plated product manufactured by Ando Electric Co., Ltd.) are used, and a guard electrode equivalent to 50 mmφ is used as a main electrode. Use the one with a gap of 1.00
mm, measurement frequency 1 kHz, measurement voltage 1.001 V, room temperature 21 to 23 ° C., humidity 55 to 65% δ-
The relative permittivity of decalactone was measured. The results are shown in Table 1.
【００２１】実施例２ δ−デカラクトンの代わりにδ−ウンデカラクトンを用
いる以外は実施例１と同様に測定した。δ−ウンデカラ
クトンの酸化限界電圧、還元限界電圧、電位窓、比誘電
率を表１に示す。Example 2 The same measurement as in Example 1 was carried out except that δ-undecalactone was used instead of δ-decalactone. Table 1 shows the oxidation limit voltage, reduction limit voltage, potential window, and relative dielectric constant of δ-undecalactone.
【００２２】実施例３ δ−デカラクトンの代わりにδ−ドデカラクトンを用い
る以外は実施例１と同様に測定した。δ−ドデカラクト
ンの酸化限界電圧、還元限界電圧、電位窓、比誘電率を
表１に示す。Example 3 The measurement was performed in the same manner as in Example 1 except that δ-dodecalactone was used instead of δ-decalactone. Table 1 shows the oxidation limit voltage, reduction limit voltage, potential window, and relative permittivity of δ-dodecalactone.
【００２３】比較例１ δ−デカラクトンの代わりにプロピレンカーボネートを
用いる以外は実施例１と同様に測定した。プロピレンカ
ーボネートの酸化限界電圧、還元限界電圧、電位窓、比
誘電率を表１に示す。Comparative Example 1 Measurement was carried out in the same manner as in Example 1 except that propylene carbonate was used instead of δ-decalactone. Table 1 shows the oxidation limit voltage, reduction limit voltage, potential window, and relative dielectric constant of propylene carbonate.
【００２４】比較例２ δ−デカラクトンの代わりにγ−ブチロラクトンを用い
る以外は実施例１と同様に測定した。なお、γ−ブチロ
ラクトンの酸化限界電圧は約４．８Ｖであったが、ラク
トン環の開環に起因すると思われる電気特性の影響で、
実用上の酸化限界電圧は約２．０Ｖであった。γ−ブチ
ロラクトンの実用上の酸化限界電圧、還元限界電圧、電
位窓、比誘電率を表１に示す。表１中の括弧内の数値
は、定義上の値である。Comparative Example 2 The same measurement as in Example 1 was carried out except that γ-butyrolactone was used instead of δ-decalactone. Note that the oxidation limit voltage of γ-butyrolactone was about 4.8 V, but due to the influence of the electrical characteristics that are thought to be due to the opening of the lactone ring,
The practical oxidation limit voltage was about 2.0V. Table 1 shows the practical oxidation limit voltage, reduction limit voltage, potential window, and relative dielectric constant of γ-butyrolactone. Numerical values in parentheses in Table 1 are values by definition.
【００２５】比較例３ δ−デカラクトンの代わりにδ−ラクトン（δ−バレロ
ラクトン）を用いる以外は実施例１と同様に測定した。
δ−ラクトンの酸化限界電圧、還元限界電圧、電位窓、
比誘電率を表１に示す。Comparative Example 3 The same measurement as in Example 1 was carried out except that δ-lactone (δ-valerolactone) was used instead of δ-decalactone.
δ-lactone oxidation limit voltage, reduction limit voltage, potential window,
Table 1 shows the relative permittivity.
【００２６】[0026]
【表１】 [Table 1]
【００２７】[0027]
【発明の効果】本発明の電解液は、溶媒の電位窓が広い
ため、耐電圧が高く、電気二重層キャパシター、コンデ
ンサー、二次電池などに用いた場合に、容量の大きなも
のが得られる。EFFECTS OF THE INVENTION The electrolytic solution of the present invention has a wide potential window of the solvent, so that it has a high withstand voltage, and when it is used for an electric double layer capacitor, a capacitor, a secondary battery, etc., a large capacity can be obtained.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ０７Ｄ 309/30 Ｃ０７Ｄ 307/32 Ｅ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI Technical display location C07D 309/30 C07D 307/32 E
Claims (1)
電解液であって、有機溶媒中に炭化水素基置換−δ−ラ
クトンを含有することを特徴とする有機溶媒系電解液。1. An organic solvent-based electrolytic solution in which an electrolyte is dissolved in an organic solvent, wherein the organic solvent contains a hydrocarbon group-substituted -δ-lactone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7222534A JPH0950944A (en) | 1995-08-08 | 1995-08-08 | Organic solvent-based electrolyte solution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7222534A JPH0950944A (en) | 1995-08-08 | 1995-08-08 | Organic solvent-based electrolyte solution |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0950944A true JPH0950944A (en) | 1997-02-18 |
Family
ID=16783949
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7222534A Pending JPH0950944A (en) | 1995-08-08 | 1995-08-08 | Organic solvent-based electrolyte solution |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0950944A (en) |
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| JP2001217005A (en) * | 1999-11-25 | 2001-08-10 | Bridgestone Corp | Non-aqueous electrolyte secondary battery |
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