JP2001023690A - Nonaqueous electrolyte for secondary battery - Google Patents
Nonaqueous electrolyte for secondary batteryInfo
- Publication number
- JP2001023690A JP2001023690A JP11194993A JP19499399A JP2001023690A JP 2001023690 A JP2001023690 A JP 2001023690A JP 11194993 A JP11194993 A JP 11194993A JP 19499399 A JP19499399 A JP 19499399A JP 2001023690 A JP2001023690 A JP 2001023690A
- Authority
- JP
- Japan
- Prior art keywords
- secondary battery
- electrolyte
- carbonate
- negative electrode
- battery
- 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
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Secondary Cells (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、二次電池用非水電
解液の改良技術に関し、特に、炭素材料よりなる負極を
有してなる二次電池における非水溶媒系のリチウム化合
物を電解質として含有する二次電池用非水電解液の改良
技術に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for improving a non-aqueous electrolyte for a secondary battery, and more particularly, to a non-aqueous solvent-based lithium compound as an electrolyte in a secondary battery having a negative electrode made of a carbon material. The present invention relates to a technique for improving a nonaqueous electrolyte for a secondary battery.
【0002】[0002]
【従来の技術】近年、カメラ一体型ビデオテ−プレコ−
ダ(VTR)、携帯電話、ラップトップコンピュータ等
の新しいポータブル電源として、特に、従来のニッケル
ーカドミニウム(Ni−Cd)二次電池や鉛二次電池に
比べ軽量で高容量且つ高エネルギー密度のリチウム二次
電池が注目されている。リチウム二次電池の構成例は、
負極にLiのド−プおよび脱ド−プが可能な炭素材料を
用い、リチウムを負極活物質として用いている。2. Description of the Related Art In recent years, camera-integrated video tape recorders have been developed.
As a new portable power source such as a VTR, a mobile phone, a laptop computer, etc., in particular, lithium which is lighter, has a higher capacity and a higher energy density than conventional nickel-cadmium (Ni-Cd) secondary batteries or lead secondary batteries. Secondary batteries are attracting attention. An example of the configuration of a lithium secondary battery is
A carbon material capable of doping and undoping Li is used for the negative electrode, and lithium is used as the negative electrode active material.
【0003】従来より、リチウム二次電池の非水電解液
の電解質としては、LiPF6等が、また、非水溶媒と
しては、炭酸プロピレン(PC)、炭酸エチレン(E
C)、炭酸ジメチル(DMC)、炭酸エチルメチル(M
EC)、炭酸ジエチル(DEC)、γーブチロラクトン
(GBL)、酢酸エチル(EA)、プロピオン酸メチル
(MPR)、1,2−ジメトキシエタン(DME)、2
−メチルテトラヒドロフラン(2−MeTHF)等が用
いられている。Conventionally, LiPF 6 or the like has been used as an electrolyte of a non-aqueous electrolyte of a lithium secondary battery, and propylene carbonate (PC), ethylene carbonate (E) has been used as a non-aqueous solvent.
C), dimethyl carbonate (DMC), ethyl methyl carbonate (M
EC), diethyl carbonate (DEC), γ-butyrolactone (GBL), ethyl acetate (EA), methyl propionate (MPR), 1,2-dimethoxyethane (DME), 2,
-Methyltetrahydrofuran (2-MeTHF) or the like is used.
【0004】しかしながら、リチウム二次電池における
負極活物質であるリチウムは、反応性に富み、上記電解
質との間で反応を起こし、その反応生成物が電極表面に
被膜となって付着し、その被膜が電池特性に大きく影響
を与えている。又、非水溶媒における炭酸エステル類
は、リチウムと反応してイオン伝導性を有する炭酸塩の
被膜を生成する為、電池内部抵抗の増加等の電池特性に
及ぼす悪影響は少なく、さらに、この被膜が負極表面の
保護膜となり、電池の保存特性等を良好にしているの
で、従来より炭素材料よりなる負極のリチウム二次電池
用非水電解液の主成分となっているが、当該炭酸エステ
ル類の中には、比較的に融点が高く、また、粘性率が高
いという欠点のあるものも存在し、又、炭酸ジメチル
(DMC)あるいは炭酸ジエチル(DEC)等の直鎖状
の炭酸エステル類は、誘電率が低く、電解液溶媒とした
時の電解液の導電率が小さく、高出力な二次電池として
要求される充分な急速充電特性あるいは低温放電特性が
得られなかったりするという難点がある。さらに、炭酸
エステル類は、二次電池の充電放電時あるいは高温下で
の保存中に、分解により炭酸ガスやオレフィンガスを生
成する為、内圧が上昇し、電池が膨れるという問題もあ
った。However, lithium, which is a negative electrode active material in a lithium secondary battery, is highly reactive and reacts with the above-mentioned electrolyte, and the reaction product adheres to the electrode surface as a film, and the film is formed. Greatly affect the battery characteristics. In addition, carbonates in a non-aqueous solvent react with lithium to form a film of a carbonate having ion conductivity, so that adverse effects on battery characteristics, such as an increase in battery internal resistance, are small. Since it becomes a protective film on the surface of the negative electrode and improves the storage characteristics and the like of the battery, it has conventionally been the main component of the nonaqueous electrolyte for a lithium secondary battery of a negative electrode made of a carbon material. Some of them have disadvantages such as relatively high melting point and high viscosity, and linear carbonates such as dimethyl carbonate (DMC) and diethyl carbonate (DEC) are: The dielectric constant is low, the conductivity of the electrolyte when used as an electrolyte solvent is low, and there is a problem that sufficient fast charging characteristics or low-temperature discharging characteristics required for a high-output secondary battery cannot be obtained. Furthermore, carbonates generate carbon dioxide gas or olefin gas by decomposition during charge / discharge of the secondary battery or during storage at a high temperature, so that the internal pressure increases and the battery swells.
【0005】[0005]
【発明が解決しようとする課題】本発明は、かかる従来
技術の有する欠点を解消できる技術を提供することを目
的としたものである。本発明の前記ならびにそのほかの
目的と新規な特徴は、本明細書の記述および添付図面か
らも明らかになるであろう。SUMMARY OF THE INVENTION An object of the present invention is to provide a technique capable of solving the drawbacks of the prior art. The above and other objects and novel features of the present invention will become apparent from the description of this specification and the accompanying drawings.
【0006】[0006]
【課題を解決するための手段】本発明は、Liのド−プ
および脱ド−プが可能な炭素材料よりなる負極を有して
なる二次電池に使用でき、非水溶媒と、電解質としてリ
チウム化合物を含む二次電池用非水電解液において、次
の式1で表されるOーターフェニルThe present invention can be used for a secondary battery having a negative electrode made of a carbon material capable of doping and dedoping Li, and comprises a non-aqueous solvent and an electrolyte. In a non-aqueous electrolyte for a secondary battery containing a lithium compound, O-terphenyl represented by the following formula 1 is used.
【式1】 を含有してなることを特徴とする二次電池用非水電解液
に係るものである。又、その好ましい実施態様として、
当該二次電池用非水電解液における前記Oーターフェニ
ルの濃度が0.01〜5重量%であることを特徴とする
二次電池用非水電解液に係るものである。(Equation 1) The present invention relates to a non-aqueous electrolyte for a secondary battery, characterized by comprising: Also, as a preferred embodiment thereof,
The present invention relates to a non-aqueous electrolyte for a secondary battery, wherein the concentration of the O-terphenyl in the non-aqueous electrolyte for a secondary battery is 0.01 to 5% by weight.
【0007】[0007]
【発明の実施の形態】以下、本発明を詳細に説明する。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.
【0008】本発明によれば炭酸エステル類にかかわら
ず各種の非水溶媒を使用することができる。本発明にお
いて使用される非水溶媒としては、例えば、炭酸プロピ
レン(PC)、炭酸エチレン(EC)、炭酸ジメチル
(DMC)、炭酸エチルメチル(MEC)、炭酸ジエチ
ル(DEC)、γーブチロラクトン(GBL)、酢酸エ
チル(EA)、プロピオン酸メチル(MPR)、プロピ
オン酸エチル(EPR)、1,2−ジメトキシエタン
(DME)、1,2−ジエトキシエタン(DEE)、2
−メチルテトラヒドロフラン(2−MeTHF)、テト
ラヒドロフラン(THF)、スルホラン(SL)、メチ
ルスルホラン(MeSL)等従来より二次電池用非水電
解液において用いられているような各種の溶媒を使用す
ることができ、これらは二種以上を混合して用いてもよ
い。According to the present invention, various non-aqueous solvents can be used regardless of carbonates. Examples of the non-aqueous solvent used in the present invention include propylene carbonate (PC), ethylene carbonate (EC), dimethyl carbonate (DMC), ethyl methyl carbonate (MEC), diethyl carbonate (DEC), and γ-butyrolactone (GBL). ), Ethyl acetate (EA), methyl propionate (MPR), ethyl propionate (EPR), 1,2-dimethoxyethane (DME), 1,2-diethoxyethane (DEE),
-Various solvents such as methyltetrahydrofuran (2-MeTHF), tetrahydrofuran (THF), sulfolane (SL), and methylsulfolane (MeSL) which have been conventionally used in nonaqueous electrolytes for secondary batteries can be used. These may be used in combination of two or more.
【0009】本発明の二次電池用非水電解液において
は、電解質としてリチウム化合物を使用する。これによ
り、本電解質はリチウム二次電池の電解液として特に有
用となる。このようなリチウム化合物としては、従来の
リチウム二次電池において用いられているものを使用す
ることができる。例えば、LiClO4、LiAs
F6、LiPF6、LiBF4、LiCF3SO3、L
iN(CF3SO2)2、LiC(CF3SO2)3等
を使用できる。電解質であるリチウム化合物の二次電池
用非水電解液中での濃度は、導電率の点等から0.1〜
3.0mol/リットル、好ましくは0.3〜2.0m
ol/リットルとするとよい。In the non-aqueous electrolyte for a secondary battery according to the present invention, a lithium compound is used as an electrolyte. This makes the present electrolyte particularly useful as an electrolyte for a lithium secondary battery. As such a lithium compound, those used in a conventional lithium secondary battery can be used. For example, LiClO 4 , LiAs
F 6 , LiPF 6 , LiBF 4 , LiCF 3 SO 3 , L
iN (CF 3 SO 2 ) 2 , LiC (CF 3 SO 2 ) 3 and the like can be used. The concentration of the lithium compound as an electrolyte in the non-aqueous electrolyte for a secondary battery is 0.1 to 0.1 from the viewpoint of conductivity.
3.0 mol / liter, preferably 0.3 to 2.0 m
ol / liter.
【0010】上記Oーターフェニルの非水電解液中での
濃度は、0.01〜5重量%好ましくは0.5〜3重量
%であることが望ましい。0.01重量%未満では、充
放電特性等の改善効果が充分でなく、一方、5重量%を
超えても、当該効果が飽和し、逆に電池容量が低下する
傾向にある。[0010] The concentration of the O-terphenyl in the non-aqueous electrolyte is preferably 0.01 to 5% by weight, more preferably 0.5 to 3% by weight. If the amount is less than 0.01% by weight, the effect of improving the charge / discharge characteristics and the like is not sufficient. On the other hand, if the amount exceeds 5% by weight, the effect is saturated and the battery capacity tends to decrease.
【0011】本発明の二次電池用非水電解液は、例え
ば、非水溶媒を撹拌しながら、その中に電解質としてリ
チウム化合物を添加して溶解させ、上記オルトーターフ
ェニルを添加して溶解させることにより製造することが
できる。The non-aqueous electrolyte for a secondary battery of the present invention is dissolved, for example, by adding a lithium compound as an electrolyte into the non-aqueous solvent while stirring the non-aqueous solvent, and adding the above orthoterphenyl. It can be manufactured by the following.
【0012】本発明の二次電池用非水電解液は、リチウ
ム化合物を電解質とする種々の二次電池に適用できる。
Liのド−プおよび脱ド−プが可能な炭素材料よりなる
負極を有してなる二次電池にも適用することができる。
即ち、充電時にLiを析出させ、放電時に溶出させる炭
素材料よりなる負極を有してなる二次電池にも適用する
ことができる。上記Liのド−プおよび脱ド−プは、例
えば、リチウム金属、リチウム合金またはリチウムイオ
ンにより行なうことができる。ここで、リチウム合金と
しては、リチウムーアルミニウム合金を例示することが
できる。負極を構成する炭素材料には、例えば、熱分解
炭素類、コークス類(ピッチコークス、ニードルコーク
ス、石油コークス等)、グラファイト類、有機高分子化
合物焼成体(フェノール樹脂、フラン樹脂等を適当な温
度で焼成し炭素化したもの)、炭素繊維、活性炭等が挙
げられる。当該炭素材料は、黒鉛化したものでも、その
炭素−炭素間の層間距離が3.4Å(オングストロ−
ム)以下のものでもよい。The non-aqueous electrolyte for a secondary battery of the present invention can be applied to various secondary batteries using a lithium compound as an electrolyte.
The present invention can also be applied to a secondary battery having a negative electrode made of a carbon material capable of doping and dedoping Li.
That is, the present invention can be applied to a secondary battery having a negative electrode made of a carbon material that precipitates Li during charging and elutes during discharging. The doping and dedoping of Li can be performed by, for example, lithium metal, lithium alloy or lithium ion. Here, as the lithium alloy, a lithium-aluminum alloy can be exemplified. Examples of the carbon material constituting the negative electrode include pyrolytic carbons, cokes (pitch coke, needle coke, petroleum coke, etc.), graphites, and organic polymer compound fired bodies (phenol resin, furan resin, etc.) at an appropriate temperature. Fired and carbonized), carbon fiber, activated carbon and the like. Even if the carbon material is graphitized, the carbon-to-carbon interlayer distance is 3.4 ° (angstrom).
M) The following may be used.
【0013】一方、正極は、充放電が可能な種々の材料
から形成することができる。例えば、LiCoO2、L
iNiO2、LiMn2O4、LiMnO2などのLi
xMO2(ここで、Mは一種以上の遷移金属であり、x
は電池の充放電状態によって異なり、通常0.05≦x
≦1.20である)で表される、リチウムと一種以上の
遷移金属との複合酸化物や、FeS2、TiS2、V2
O5、MoO3、MoS2などの遷移元素のカルコゲナ
イトあるいはポリアセチレン、ポリピロール等のポリマ
ー等を使用することができる。On the other hand, the positive electrode can be formed from various chargeable / dischargeable materials. For example, LiCoO 2 , L
Li such as iNiO 2 , LiMn 2 O 4 , LiMnO 2
x MO 2 (where M is one or more transition metals, x
Varies depending on the charge / discharge state of the battery, usually 0.05 ≦ x
≦ 1.20), a composite oxide of lithium and one or more transition metals, FeS 2 , TiS 2 , V 2
A transition element such as chalcogenite such as O 5 , MoO 3 or MoS 2 or a polymer such as polyacetylene or polypyrrole can be used.
【0014】本発明の二次電池用非水電解液を使用した
二次電池の形状については特に限定されることはなく、
ボタン型、円筒型、角型、コイン型等の種々の形状にす
ることができる。The shape of the secondary battery using the non-aqueous electrolyte for a secondary battery of the present invention is not particularly limited.
Various shapes such as a button type, a cylindrical type, a square type, and a coin type can be used.
【0015】[0015]
【実施例】以下、本発明を実施例に基づいて更に説明す
る。The present invention will be further described below with reference to examples.
【0016】実施例1.当該実施例で用いた非水電解液
二次電池は、正極と負極とセパレータと非水電解液とボ
タン型電池容器と正極側集電体と負極側集電体とガスケ
ットとを有してなるもので、上記正極として、LiCo
O2を正極活物質とする合剤をペレット状に加圧成形し
た成形品を使用し、また、負極として、黒鉛を負極活物
質担体とした合剤をペレット状に加圧成形した成形品を
使用した。また、非水電解液には、炭酸エチレン(E
C)と炭酸ジエチル(DEC)との混合溶媒(容量比
2:3)に、LiPF6からなる電解質を濃度1mol
/リットルにて含有させ、さらに、Oーターフェニルを
1重量%含有してなる溶液を使用した。更に、上記セパ
レータにはポリプロピレン製の不織布よりなるセパレー
タを用い、正極側集電体はステンレス鋼により構成し、
一方、負極側集電体はニッケルエキスパンドメタルによ
り構成し、さらに、上記電池容器はステンレス鋼より構
成し、その正極缶と負極缶をポリプロピレンのガスケッ
トにより固定した。以上のようにして作製した電池につ
いて、充放電サイクル特性を調べた。尚、充電は定電流
法とし、上限電圧を4.2V、定電流での電流密度を
0.5Cに設定し、放電は、電流密度を0.5Cに設定
し、終止電圧は、2.7Vとした。通常充放電は25℃
で100サイクル実施した。100サイクルでの電池容
量の比較から評価した。Embodiment 1 FIG. The non-aqueous electrolyte secondary battery used in this example has a positive electrode, a negative electrode, a separator, a non-aqueous electrolyte, a button-type battery container, a positive electrode current collector, a negative electrode current collector, and a gasket. Wherein the positive electrode is LiCo
A molded product obtained by press-forming a mixture containing O 2 as a positive electrode active material into a pellet is used. A molded product obtained by pressure-forming a mixture containing graphite as a negative electrode active material carrier is used as a negative electrode. used. The non-aqueous electrolyte includes ethylene carbonate (E
C) and diethyl carbonate (DEC) in a mixed solvent (volume ratio 2: 3) containing an electrolyte made of LiPF 6 at a concentration of 1 mol.
Per liter, and a solution containing 1% by weight of O-terphenyl was used. Further, a separator made of polypropylene non-woven fabric is used for the separator, and the positive electrode side current collector is made of stainless steel,
On the other hand, the negative electrode side current collector was made of nickel expanded metal, and the battery case was made of stainless steel, and the positive electrode can and the negative electrode can were fixed with a polypropylene gasket. The charge / discharge cycle characteristics of the battery fabricated as described above were examined. The charging was performed by the constant current method, the upper limit voltage was set to 4.2 V, the current density at constant current was set to 0.5 C, and the discharge was set to 0.5 C at the current density, and the final voltage was 2.7 V. And Normal charge / discharge is 25 ° C
For 100 cycles. Evaluation was made by comparing the battery capacities at 100 cycles.
【0017】実施例2.実施例1における非水電解液を
炭酸エチレン(EC)と炭酸ジメチル(DMC)との混
合溶媒(容量比1:1)とし、また、Oーターフェニル
の添加量を3重量%とした以外は、上記実施例1と同様
にしてボタン型電池を作製し、実施例1と同様の条件下
で、充放電サイクル特性を調べた。Embodiment 2 FIG. Except that the non-aqueous electrolyte in Example 1 was a mixed solvent of ethylene carbonate (EC) and dimethyl carbonate (DMC) (volume ratio 1: 1), and the addition amount of O-terphenyl was 3% by weight, A button-type battery was manufactured in the same manner as in Example 1, and the charge / discharge cycle characteristics were examined under the same conditions as in Example 1.
【0018】比較例1.実施例1においてOーターフェ
ニルを添加しなかった以外は、上記実施例1と同様にし
てボタン型電池を作製し、実施例1と同様の条件下で、
充放電サイクル特性を調べた。Comparative Example 1 A button-type battery was produced in the same manner as in Example 1 except that O-terphenyl was not added in Example 1, and under the same conditions as in Example 1,
The charge / discharge cycle characteristics were examined.
【0019】比較例2.実施例2において、Oーターフ
ェニルを添加しなかった以外は、実施例2と同様にして
ボタン型電池を作製し、実施例1と同様の条件下で、充
放電サイクル特性を調べた。Comparative Example 2 A button-type battery was prepared in the same manner as in Example 2 except that O-terphenyl was not added in Example 2, and the charge / discharge cycle characteristics were examined under the same conditions as in Example 1.
【0020】以上の結果を、図1に示す。The above results are shown in FIG.
【0021】図1に示すように、Oーターフェニルを添
加した電解液(実施例1、2)は、100サイクルの放
電容量において、当該Oーターフェニルを加えなかった
電解液(比較例1、比較例2)に比較して、電池容量サ
イクル劣化が見られず、効果があることが判る。As shown in FIG. 1, the electrolyte solution to which O-terphenyl was added (Examples 1 and 2) was the electrolyte solution to which O-terphenyl was not added (Comparative Example 1 and Comparative Example 2) at a discharge capacity of 100 cycles. Compared with (), the battery capacity cycle deterioration was not observed, and it was found that there was an effect.
【0022】以上本発明者によってなされた発明を実施
例にもとずき具体的に説明したが、本発明は上記実施例
に限定されるものではなく、その要旨を逸脱しない範囲
で種々変更可能であることはいうまでもない。例えば、
上記実施例では、電池の形状はボタン型で説明を行なっ
たが、これに限定されるものではなく、他の角型、円筒
型、コイン型等であっても同様の効果を得ることが出来
る。Although the invention made by the inventor has been specifically described based on the embodiments, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the gist of the invention. Needless to say, For example,
In the above embodiment, the shape of the battery is described as a button type, but the shape is not limited to this, and similar effects can be obtained even with other square, cylindrical, coin type, etc. .
【0023】[0023]
【発明の効果】本願において開示される発明のうち代表
的なものによって得られる効果を簡単に説明すれば、下
記のとおりである。すなわち、本発明によれば、電解液
の分解を抑制して、炭酸ガスやオレフィンガスの生成に
よる電池の内圧の上昇による電池の膨れを防止し、又、
非水溶媒を含むリチウム二次電池における電解液の充放
電特性を向上させ、その充放電サイクル特性を改善する
ことができ、更には、炭素材料よりなる負極の二次電池
では、分解が起こり、使用し難いとされているような非
水溶媒を使用できるようにすることができる。The effects obtained by the representative ones of the inventions disclosed in the present application will be briefly described as follows. That is, according to the present invention, the decomposition of the electrolytic solution is suppressed, and the expansion of the battery due to the increase in the internal pressure of the battery due to the generation of carbon dioxide gas or olefin gas is prevented,
The charge / discharge characteristics of the electrolyte in the lithium secondary battery containing the non-aqueous solvent can be improved, and the charge / discharge cycle characteristics can be improved.Moreover, in the negative electrode secondary battery made of a carbon material, decomposition occurs, Non-aqueous solvents that are considered difficult to use can be made available.
【図1】図1は、本発明の作用効果を説明するグラフで
ある。FIG. 1 is a graph illustrating the operation and effect of the present invention.
1…実施例1 2…実施例2 3…比較例1 4…比較例2 DESCRIPTION OF SYMBOLS 1 ... Example 1 2 ... Example 2 3 ... Comparative example 1 4 ... Comparative example 2
───────────────────────────────────────────────────── フロントページの続き (72)発明者 六角 隆広 埼玉県富士見市水谷東3−11−1 富山薬 品工業株式会社志木工場内 (72)発明者 小島 哲雄 埼玉県富士見市水谷東3−11−1 富山薬 品工業株式会社志木工場内 (72)発明者 上田 定夫 埼玉県富士見市水谷東3−11−1 富山薬 品工業株式会社志木工場内 (72)発明者 中野 稔 埼玉県富士見市水谷東3−11−1 富山薬 品工業株式会社志木工場内 Fターム(参考) 4H006 AA03 AB78 BJ50 FC54 5H029 AJ02 AJ05 AJ07 AJ12 AK02 AK03 AK05 AK16 AL06 AL07 AL08 AL12 AM02 AM03 AM04 AM05 AM07 BJ02 BJ03 DJ08 EJ11 HJ01 HJ10 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takahiro Hexagon 3-11-1 Mizutani Higashi, Fujimi-shi, Saitama Toyama Pharmaceutical Co., Ltd. Shiki Plant (72) Inventor Tetsuo Kojima 3-11 Mizutani-Higashi, Fujimi-shi, Saitama -1 Inside the Shiki Plant of Toyama Pharmaceutical Co., Ltd. (72) Inventor Sadao Ueda 3-1-1-1 Mizutani Higashi, Fujimi City, Saitama Prefecture Inside the Shiki Plant of Toyama Pharmaceutical Co., Ltd. (72) Inventor Minoru Nakano Mizutani, Fujimi City, Saitama Prefecture 3-11-1 Toyama Pharmaceutical Co., Ltd. Shiki Plant F term (reference) 4H006 AA03 AB78 BJ50 FC54 5H029 AJ02 AJ05 AJ07 AJ12 AK02 AK03 AK05 AK16 AL06 AL07 AL08 AL12 AM02 AM03 AM04 AM05 AM07 BJ02 BJ03 DJ08 EJ11 HJ01 H08
Claims (2)
素材料よりなる負極を有してなる二次電池に使用でき、
非水溶媒と、電解質としてリチウム化合物を含む二次電
池用非水電解液において、次の式1で表されるOーター
フェニル 【式1】 を含有してなることを特徴とする二次電池用非水電解
液。Claims: 1. A secondary battery having a negative electrode made of a carbon material capable of doping and undoping Li,
In a non-aqueous solvent for a secondary battery containing a non-aqueous solvent and a lithium compound as an electrolyte, O-terphenyl represented by the following formula 1 is used. A non-aqueous electrolyte for a secondary battery, comprising:
載のOーターフェニルの濃度が0.01〜5重量%であ
ることを特徴とする、請求項1に記載の二次電池用非水
電解液。2. The secondary battery according to claim 1, wherein the concentration of the O-terphenyl according to claim 1 in the non-aqueous electrolyte for a secondary battery is 0.01 to 5% by weight. For non-aqueous electrolyte.
Priority Applications (1)
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JP11194993A JP2001023690A (en) | 1999-07-08 | 1999-07-08 | Nonaqueous electrolyte for secondary battery |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11194993A JP2001023690A (en) | 1999-07-08 | 1999-07-08 | Nonaqueous electrolyte for secondary battery |
Publications (1)
Publication Number | Publication Date |
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JP2001023690A true JP2001023690A (en) | 2001-01-26 |
Family
ID=16333760
Family Applications (1)
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JP11194993A Pending JP2001023690A (en) | 1999-07-08 | 1999-07-08 | Nonaqueous electrolyte for secondary battery |
Country Status (1)
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JP (1) | JP2001023690A (en) |
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JP2002117895A (en) * | 2000-10-12 | 2002-04-19 | Matsushita Electric Ind Co Ltd | Electrolysis liquid for non-aqueous system battery and non-aqueous system secondary battery |
WO2002047192A1 (en) * | 2000-12-04 | 2002-06-13 | Nippon Steel Chemical Co., Ltd. | Nonaqueous electrolyte and secondary cell using the same |
WO2003012912A1 (en) * | 2001-07-27 | 2003-02-13 | Mitsubishi Chemical Corporation | Non-aqueous electrolytic solution and non-aqueous electrolytic solution secondary cell using the same |
KR100402746B1 (en) * | 2001-10-20 | 2003-10-17 | 삼성에스디아이 주식회사 | Non aqueous electrolyte for improving overcharge safety and lithium battery using the same |
KR100424259B1 (en) * | 2001-10-20 | 2004-03-22 | 삼성에스디아이 주식회사 | Non aqueous electrolyte for improving overcharge safety and lithium battery using the same |
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JP2006114285A (en) * | 2004-10-13 | 2006-04-27 | Samsung Sdi Co Ltd | Nonaqueous electrolyte for lithium secondary battery, the lithium secondary battery, and secondary battery system |
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-
1999
- 1999-07-08 JP JP11194993A patent/JP2001023690A/en active Pending
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