JPH1012276A - Nonaqueous electrolyte battery - Google Patents
Nonaqueous electrolyte batteryInfo
- Publication number
- JPH1012276A JPH1012276A JP8186653A JP18665396A JPH1012276A JP H1012276 A JPH1012276 A JP H1012276A JP 8186653 A JP8186653 A JP 8186653A JP 18665396 A JP18665396 A JP 18665396A JP H1012276 A JPH1012276 A JP H1012276A
- Authority
- JP
- Japan
- Prior art keywords
- aqueous electrolyte
- nonaqueous electrolyte
- battery
- negative electrode
- polystyrene
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、正極と、負極
と、非水電解液とを備えた非水電解液電池において、充
電時における負極等と非水電解液とが反応して自己放電
が生じるということが少なく、保存特性に優れた非水電
解液電池に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-aqueous electrolyte battery including a positive electrode, a negative electrode, and a non-aqueous electrolyte. The present invention relates to a non-aqueous electrolyte battery which rarely occurs and has excellent storage characteristics.
【０００２】[0002]
【従来の技術】近年、高出力，高エネルギー密度の新型
電池として、電解質に非水電解液を用い、リチウムの酸
化，還元を利用した高起電力の非水電解液電池が利用さ
れるようになった。2. Description of the Related Art In recent years, non-aqueous electrolyte batteries using a non-aqueous electrolyte as an electrolyte and utilizing the oxidation and reduction of lithium have been used as new types of batteries with high output and high energy density. became.
【０００３】そして、このような非水電解液電池におい
ては、その非水電解液として、エチレンカーボネートや
プロピレンカーボネート等の各種の非水系溶媒中に、Ｌ
ｉＰＦ6 やＬｉＢＦ4 等のリチウム化合物からなる溶質
を溶解させたものが使用されていた。[0003] In such a non-aqueous electrolyte battery, the non-aqueous electrolyte is dissolved in various non-aqueous solvents such as ethylene carbonate and propylene carbonate.
obtained by dissolving a solute consisting iPF 6 and LiBF lithium compound such as 4 have been used.
【０００４】しかし、上記のような非水系溶媒を用いた
非水電解液電池においても、この非水電解液中に水分が
含有され、この非水電解液中における水分が充電時にお
ける負極等と反応して自己放電が生じ、保存時における
電池容量が低下して保存特性が悪くなる等の問題があっ
た。However, even in a non-aqueous electrolyte battery using a non-aqueous solvent as described above, moisture is contained in the non-aqueous electrolyte, and the moisture in the non-aqueous electrolyte becomes negative with the negative electrode or the like during charging. There is a problem that self-discharge occurs due to the reaction, the battery capacity during storage is reduced, and storage characteristics are deteriorated.
【０００５】[0005]
【発明が解決しようとする課題】この発明は、正極と、
負極と、非水電解液とを備えた非水電解液電池における
上記のような問題を解決することを課題とするものであ
り、非水電解液中に含まれる水分が充電時における負極
等と反応して自己放電が生じるのを抑制し、保存時にお
ける電池容量の低下が少なく、保存特性に優れた非水電
解液電池が得られるようにすることを課題とするもので
ある。SUMMARY OF THE INVENTION The present invention provides a positive electrode,
It is an object of the present invention to solve the above-described problems in a nonaqueous electrolyte battery including a negative electrode and a nonaqueous electrolyte, and the water contained in the nonaqueous electrolyte is charged with a negative electrode or the like during charging. It is an object of the present invention to suppress the occurrence of self-discharge due to a reaction, to obtain a non-aqueous electrolyte battery having excellent storage characteristics with little reduction in battery capacity during storage.
【０００６】[0006]
【課題を解決するための手段】この発明においては、上
記のような課題を解決するため、正極と、負極と、非水
電解液とを備えた非水電解液電池において、上記の非水
電解液中に、ポリスチレンとポリブタジエンの少なくと
も１種を含む添加剤を添加させるようにしたのである。According to the present invention, there is provided a non-aqueous electrolyte battery comprising a positive electrode, a negative electrode, and a non-aqueous electrolytic solution. An additive containing at least one of polystyrene and polybutadiene is added to the liquid.
【０００７】そして、この発明における非水電解液電池
のように、非水電解液中にポリスチレンとポリブタジエ
ンの少なくとも１種を含む添加剤を添加させると、この
ポリスチレンやポリブタジエンが非水電解液中における
水分を取り囲むようになり、これにより充電時における
負極等と非水電解液中における水分とが接触して反応す
る確率が低くなり、保存時における自己放電が抑制され
て、電池容量の低下が減少し、保存特性が向上すると考
えられる。When an additive containing at least one of polystyrene and polybutadiene is added to the nonaqueous electrolyte as in the nonaqueous electrolyte battery of the present invention, the polystyrene and polybutadiene are added to the nonaqueous electrolyte. Moisture is surrounded, which reduces the probability of contact and reaction between the negative electrode etc. and the water in the non-aqueous electrolyte during charging, suppresses self-discharge during storage and reduces battery capacity reduction It is considered that the storage characteristics are improved.
【０００８】ここで、上記のように非水電解液中に、ポ
リスチレンとポリブタジエンの少なくとも１種を含む添
加剤を添加させるにあたっては、その添加量が少ない
と、非水電解液中における水分を取り囲んで、充電時に
おける負極等との反応を十分に抑制することができない
一方、添加量が多くなりすぎると、非水電解液としての
特性が低下するため、これらの添加剤を非水電解液に添
加するにあたっては、非水電解液に対して添加剤の添加
量が０．１〜９０．０重量％、好ましくは２０．０〜８
０．０重量％、より好ましくは４０．０〜６０．０重量
％の範囲になるようにする。Here, as described above, when an additive containing at least one of polystyrene and polybutadiene is added to the non-aqueous electrolyte, if the amount of addition is small, water in the non-aqueous electrolyte is surrounded. In addition, while the reaction with the negative electrode or the like during charging cannot be sufficiently suppressed, if the amount of addition is too large, the characteristics of the non-aqueous electrolyte decrease, so these additives are added to the non-aqueous electrolyte. In the addition, the amount of the additive is 0.1 to 90.0% by weight, preferably 20.0 to 8% by weight based on the non-aqueous electrolyte.
0.0 wt%, more preferably in the range of 40.0 to 60.0 wt%.
【０００９】また、この発明の非水電解液電池における
上記の非水電解液としては、従来より使用されている公
知の非水電解液を用いることができ、この非水電解液に
おける溶媒としては、例えば、エチレンカーボネート、
プロピレンカーボネート、ブチレンカーボネート、ビニ
レンカーボネート、シクロペンタノン、スルホラン、ジ
メチルスルホラン、３−メチル−１，３−オキサゾリジ
ン−２−オン、γ−ブチロラクトン、ジメチルカーボネ
ート、ジエチルカーボネート、エチルメチルカーボネー
ト、メチルプロピルカーボネート、ブチルメチルカーボ
ネート、エチルプロピルカーボネート、ブチルエチルカ
ーボネート、ジプロピルカーボネート、１，２−ジメト
キシエタン、テトラヒドロフラン、２−メチルテトラヒ
ドロフラン、１，３−ジオキソラン、酢酸メチル、酢酸
エチル等の溶媒を１種又は２種以上組み合わせて用いる
ことができる。Further, as the above-mentioned non-aqueous electrolyte in the non-aqueous electrolyte battery of the present invention, a conventionally known non-aqueous electrolyte can be used. , For example, ethylene carbonate,
Propylene carbonate, butylene carbonate, vinylene carbonate, cyclopentanone, sulfolane, dimethylsulfolane, 3-methyl-1,3-oxazolidine-2-one, γ-butyrolactone, dimethyl carbonate, diethyl carbonate, ethyl methyl carbonate, methyl propyl carbonate, One or two kinds of solvents such as butyl methyl carbonate, ethyl propyl carbonate, butyl ethyl carbonate, dipropyl carbonate, 1,2-dimethoxyethane, tetrahydrofuran, 2-methyltetrahydrofuran, 1,3-dioxolan, methyl acetate, and ethyl acetate These can be used in combination.
【００１０】また、この非水電解液において上記の溶媒
に溶解させる溶質としても、公知の溶質を用いることが
でき、例えば、ＬｉＰＦ6 、ＬｉＢＦ4 、ＬｉＣｌＯ
4 、ＬｉＣＦ3 ＳＯ3 、ＬｉＡｓＦ6 、ＬｉＮ（ＣＦ3
ＳＯ2 ）2 、ＬｉＯＳＯ2 （ＣＦ2 ）3 ＣＦ3 等のリチ
ウム化合物を使用することができる。In the non-aqueous electrolyte, any known solute can be used as a solute to be dissolved in the above-mentioned solvent. For example, LiPF 6 , LiBF 4 , LiClO
4 , LiCF 3 SO 3 , LiAsF 6 , LiN (CF 3
Lithium compounds such as SO 2 ) 2 and LiOSO 2 (CF 2 ) 3 CF 3 can be used.
【００１１】また、この発明の非水電解液電池におい
て、その正極を構成する正極材料としては、リチウムイ
オンを吸蔵，放出することができる金属化合物等の公知
の正極材料を用いることができ、例えば、マンガン，コ
バルト，ニッケル，鉄，バナジウム，ニオブの少なくと
も１種を含むリチウム遷移金属複合酸化物等を使用する
ことができ、具体的には、ＬｉＣｏＯ2 、ＬｉＮｉＯ
2 、ＬｉＭｎＯ2 、ＬｉＦｅＯ2 等の材料を使用するこ
とができる。In the non-aqueous electrolyte battery according to the present invention, as the positive electrode material constituting the positive electrode, a known positive electrode material such as a metal compound capable of inserting and extracting lithium ions can be used. , Manganese, cobalt, nickel, iron, vanadium, niobium, and the like. For example, a lithium transition metal composite oxide can be used. Specifically, LiCoO 2 , LiNiO
Can be used 2, LiMnO 2, LiFeO 2 or the like materials.
【００１２】また、この発明における非水電解液電池に
おいて、その負極を構成する負極材料としても公知の負
極材料を用いることができ、金属リチウムや、Ｌｉ−Ａ
ｌ，Ｌｉ−Ｉｎ，Ｌｉ−Ｓｎ，Ｌｉ−Ｐｂ，Ｌｉ−Ｂ
ｉ，Ｌｉ−Ｇａ，Ｌｉ−Ｓｒ，Ｌｉ−Ｓｉ，Ｌｉ−Ｚ
ｎ，Ｌｉ−Ｃｄ，Ｌｉ−Ｃａ，Ｌｉ−Ｂａ等のリチウム
合金の他に、リチウムイオンの吸蔵，放出が可能な黒
鉛，コークス，有機物焼成体等の炭素材料を用いること
ができる。In the nonaqueous electrolyte battery according to the present invention, a known negative electrode material can be used as a negative electrode material constituting the negative electrode, and lithium metal, Li-A
1, Li-In, Li-Sn, Li-Pb, Li-B
i, Li-Ga, Li-Sr, Li-Si, Li-Z
In addition to lithium alloys such as n, Li-Cd, Li-Ca, and Li-Ba, carbon materials such as graphite, coke, and organic fired bodies capable of occluding and releasing lithium ions can be used.
【００１３】[0013]
【実施例】以下、この発明に係る非水電解液電池につい
て実施例をあげて具体的に説明すると共に、この実施例
における非水電解液電池においては、自己放電が少なく
って保存特性が向上するということを比較例をあげて明
らかにする。なお、この発明に係る非水電解質電池は下
記の実施例に示したものに限定されるものではなく、そ
の要旨を変更しない範囲において適宜変更して実施でき
るものである。EXAMPLES Hereinafter, the nonaqueous electrolyte battery according to the present invention will be specifically described with reference to examples. In the nonaqueous electrolyte battery according to this example, self-discharge is reduced and storage characteristics are improved. This will be clarified using a comparative example. The nonaqueous electrolyte battery according to the present invention is not limited to those shown in the following examples, but can be implemented by appropriately changing the scope of the invention without changing its gist.
【００１４】（実施例１）この実施例においては、下記
のようにして作製した正極と負極と非水電解液とを用
い、図１に示すような円筒型の非水電解液二次電池を作
製した。Embodiment 1 In this embodiment, a cylindrical non-aqueous electrolyte secondary battery as shown in FIG. 1 was used by using a positive electrode, a negative electrode and a non-aqueous electrolyte prepared as described below. Produced.
【００１５】［正極の作製］正極を作製するにあたって
は、正極材料として、７００〜９００℃の範囲の温度で
熱処理したリチウム含有二酸化コバルトＬｉＣｏＯ2 を
用い、このＬｉＣｏＯ2 と、導電剤であるカーボン粉末
と、結着剤であるフッ素樹脂粉末とを８５：１０：５の
重量比で混合し、この混合物を集電体に塗布した後、こ
れを１００〜１５０℃の温度で熱処理して正極を作製し
た。[Preparation of Positive Electrode] In preparing a positive electrode, a lithium-containing cobalt dioxide LiCoO 2 heat-treated at a temperature in the range of 700 to 900 ° C. was used as a positive electrode material, and the LiCoO 2 and carbon powder as a conductive agent were used. And a fluororesin powder as a binder are mixed at a weight ratio of 85: 10: 5, and this mixture is applied to a current collector, and then heat-treated at a temperature of 100 to 150 ° C. to produce a positive electrode. did.
【００１６】［負極の作製］負極を作製するにあたって
は、負極材料として炭素材料を用い、この炭素材料と結
着剤であるフッ素樹脂粉末とを８５：１５の重量比で混
合し、この混合物を集電体に塗布した後、これを１００
〜１５０℃の温度で熱処理して負極を作製した。[Preparation of Negative Electrode] In preparing the negative electrode, a carbon material was used as a negative electrode material, and the carbon material and a fluororesin powder as a binder were mixed at a weight ratio of 85:15, and this mixture was mixed. After applying to the current collector,
Heat treatment was performed at a temperature of about 150 ° C. to produce a negative electrode.
【００１７】［非水電解液の作製］非水電解液を作製す
るにあたっては、エチレンカーボネートと１，２−ジメ
トキシエタンとを１：１の体積比で混合させた混合溶媒
に、溶質としてヘキサフルオロリン酸リチウムＬｉＰＦ
6 を１ｍｏｌ／ｌの割合で溶解させると共に、この非水
電解液に対して添加剤としてポリスチレンを４５．０重
量％の割合で添加させた。[Preparation of Non-Aqueous Electrolyte] In preparing a non-aqueous electrolyte, a solvent mixture of ethylene carbonate and 1,2-dimethoxyethane in a volume ratio of 1: 1 was mixed with hexafluoro as a solute. Lithium phosphate LiPF
6 was dissolved at a rate of 1 mol / l, and polystyrene was added as an additive to the nonaqueous electrolyte at a rate of 45.0% by weight.
【００１８】［電池の作製］電池を作製するにあたって
は、図１に示すように、上記のようにして作製した正極
１と負極２との間に、セパレータ３としてリチウムイオ
ン透過性の微多孔膜を介在させ、これらをスパイラル状
に巻いて電池缶４内に収容させた後、この電池缶４内に
上記のようにして作製した非水電解液を注液して封口
し、正極１を正極リード５を介して正極外部端子６に接
続させると共に負極２を負極リード７を介して電池缶４
に接続させ、正極外部端子６と電池缶４とを絶縁パッキ
ン８により電気的に分離させて、外径１３．８ｍｍ、高
さ４８．９ｍｍの円筒状になった非水電解液二次電池を
得た。[Preparation of Battery] In preparing a battery, as shown in FIG. 1, a lithium ion-permeable microporous film as a separator 3 was placed between the positive electrode 1 and the negative electrode 2 prepared as described above. After winding them in a spiral shape and accommodating them in the battery can 4, the non-aqueous electrolyte prepared as described above is injected into the battery can 4 and sealed. The negative electrode 2 is connected to the positive electrode external terminal 6 via the lead 5 and the negative electrode 2 is connected to the battery can 4 via the negative electrode lead 7.
And the positive electrode external terminal 6 and the battery can 4 are electrically separated by an insulating packing 8 to obtain a cylindrical nonaqueous electrolyte secondary battery having an outer diameter of 13.8 mm and a height of 48.9 mm. Obtained.
【００１９】（比較例１）この比較例においては、実施
例１の非水電解液二次電池における非水電解液の作製に
おいて、非水電解液にポリスチレンを添加させないよう
にし、それ以外については、実施例１の場合と同様にし
て非水電解液二次電池を作製した。(Comparative Example 1) In this comparative example, in the preparation of the non-aqueous electrolyte in the non-aqueous electrolyte secondary battery of Example 1, polystyrene was not added to the non-aqueous electrolyte. A non-aqueous electrolyte secondary battery was manufactured in the same manner as in Example 1.
【００２０】（実施例２）この実施例においては、実施
例１の非水電解液二次電池における非水電解液の作製に
おいて、その溶媒として、プロピレンカーボネートと
１，２−ジメトキシエタンとが１：１の体積比で混合さ
れた混合溶媒を用いるようにし、それ以外については、
実施例１の場合と同様にして非水電解液二次電池を作製
した。Embodiment 2 In this embodiment, in the preparation of the non-aqueous electrolyte in the non-aqueous electrolyte secondary battery of Example 1, propylene carbonate and 1,2-dimethoxyethane were used as solvents. : Use a mixed solvent mixed in a volume ratio of 1: 1.
A non-aqueous electrolyte secondary battery was produced in the same manner as in Example 1.
【００２１】（比較例２）この比較例においては、実施
例１の非水電解液二次電池における非水電解液の作製に
おいて、その溶媒として、上記実施例２と同じプロピレ
ンカーボネートと１，２−ジメトキシエタンとが１：１
の体積比で混合された混合溶媒を用いると共に、上記比
較例１の場合と同様に、非水電解液にポリスチレンを添
加させないようにし、それ以外については、実施例１の
場合と同様にして非水電解液二次電池を作製した。(Comparative Example 2) In this comparative example, the same propylene carbonate as in Example 2 above was used as the solvent in the preparation of the nonaqueous electrolyte in the nonaqueous electrolyte secondary battery of Example 1. 1: 1 with dimethoxyethane
In the same manner as in Comparative Example 1 above, so as not to add polystyrene to the non-aqueous electrolyte solution. A water electrolyte secondary battery was produced.
【００２２】（実施例３）この実施例においては、実施
例１の非水電解液二次電池における非水電解液の作製に
おいて、ポリスチレンのかわりに添加剤としてポリブタ
ジエンを非水電解液に対して４５．０重量％の割合で添
加し、それ以外については、実施例１の場合と同様にし
て非水電解液二次電池を作製した。Example 3 In this example, polybutadiene was used as an additive instead of polystyrene in the preparation of a non-aqueous electrolyte in the non-aqueous electrolyte secondary battery of Example 1. A non-aqueous electrolyte secondary battery was produced in the same manner as in Example 1 except that it was added at a ratio of 45.0% by weight.
【００２３】（実施例４）この実施例においては、実施
例１の非水電解液二次電池における非水電解液の作製に
おいて、ポリスチレンとポリブタジエンとが１：１の重
量比になった添加剤を非水電解液に対して４５．０重量
％の割合で添加し、それ以外については、実施例１の場
合と同様にして非水電解液二次電池を作製した。Example 4 In this example, an additive was prepared in which the polystyrene and polybutadiene were in a 1: 1 weight ratio in the preparation of the nonaqueous electrolyte in the nonaqueous electrolyte secondary battery of Example 1. Was added at a ratio of 45.0% by weight with respect to the non-aqueous electrolyte, and otherwise, a non-aqueous electrolyte secondary battery was produced in the same manner as in Example 1.
【００２４】次に、上記のようにして作製した実施例１
〜４及び比較例１，２の各非水電解液二次電池につい
て、それぞれ電池を作製した直後の放電容量Ｑ０と、作
製した電池を６０℃で２ヶ月間保存した後における放電
容量Ｑ１とを測定し、下記の式により各非水電解液二次
電池における自己放電率を求め、その結果を下記の表１
に示した。 自己放電率（％）＝１００×（１−Ｑ１÷Ｑ０）Next, the first embodiment manufactured as described above was used.
For each of the nonaqueous electrolyte secondary batteries of Comparative Examples 1 to 4 and Comparative Examples 1 and 2, the discharge capacity Q0 immediately after preparing the battery and the discharge capacity Q1 after storing the prepared battery at 60 ° C. for 2 months are shown. The self-discharge rate in each non-aqueous electrolyte secondary battery was measured by the following equation, and the result was calculated as shown in Table 1 below.
It was shown to. Self-discharge rate (%) = 100 × (1−Q1 ÷ Q0)
【００２５】[0025]
【表１】 [Table 1]
【００２６】この結果、非水電解液に対してポリスチレ
ンとポリブタジエンの少なくとも１種を含む添加剤を添
加させた実施例１〜５の各非水電解液二次電池において
は、非水電解液にこれらの添加剤を添加させなかった比
較例１，２の非水電解液二次電池に比べて、非水電解液
と負極との反応が抑制され、自己放電率が非常に低くな
っており、非水電解液二次電池における保存特性が著し
く向上した。As a result, in each of the non-aqueous electrolyte secondary batteries of Examples 1 to 5 in which an additive containing at least one of polystyrene and polybutadiene was added to the non-aqueous electrolyte, Compared with the non-aqueous electrolyte secondary batteries of Comparative Examples 1 and 2 in which these additives were not added, the reaction between the non-aqueous electrolyte and the negative electrode was suppressed, and the self-discharge rate was extremely low. The storage characteristics of the non-aqueous electrolyte secondary battery were significantly improved.
【００２７】（実験例１）この実験例においては、実施
例１の非水電解液二次電池における非水電解液の作製に
おいて、非水電解液に対して添加するポリスチレンの添
加量を、図２に示すように、０．１〜９０重量％の範囲
で変化させて各非水電解液二次電池を作製した。(Experimental Example 1) In this experimental example, the amount of polystyrene added to the non-aqueous electrolyte in the preparation of the non-aqueous electrolyte in the non-aqueous electrolyte secondary battery of Example 1 is shown in FIG. As shown in FIG. 2, each non-aqueous electrolyte secondary battery was manufactured in the range of 0.1 to 90% by weight.
【００２８】そして、これらの各非水電解液二次電池に
ついて保存前のものと、６０℃で２ヶ月間保存したもの
とについて、それぞれ放電電流２００ｍＡで放電終始電
圧２．７５Ｖまで放電させて、各非水電解液二次電池に
おける放電容量を測定し、前記の比較例１のものと合わ
せて図２に示した。The non-aqueous electrolyte secondary batteries before storage and those stored at 60 ° C. for 2 months were discharged at a discharge current of 200 mA to a voltage of 2.75 V at the end of discharge. The discharge capacity of each non-aqueous electrolyte secondary battery was measured, and the results are shown in FIG.
【００２９】この結果、上記のように非水電解液に対し
てポリスチレンを添加させた各実験例のものは、ポリス
チレンを添加させなかった比較例１のものに比べて保存
後における放電容量が高くなっており、またポリスチレ
ンの添加量を、非水電解液に対して２０〜８０重量％の
範囲にした場合、特に４０〜６０重量％の範囲にした場
合には、保存後における放電容量が非常に高くなり、保
存特性に優れた非水電解液二次電池が得られた。As a result, in each of the experimental examples in which polystyrene was added to the non-aqueous electrolyte as described above, the discharge capacity after storage was higher than that in Comparative Example 1 in which polystyrene was not added. When the addition amount of polystyrene is in the range of 20 to 80% by weight, particularly in the range of 40 to 60% by weight, the discharge capacity after storage is extremely low. And a non-aqueous electrolyte secondary battery having excellent storage characteristics was obtained.
【００３０】[0030]
【発明の効果】以上詳述したように、この発明における
非水電解液電池においては、その非水電解液中にポリス
チレンとポリブタジエンの少なくとも１種を含む添加剤
を添加させるようにしたため、このポリスチレンやポリ
ブタジエンにより非水電解液中における水分が取り囲ま
れて、充電時における負極等と非水電解液中における水
分との反応が抑制され、保存時における自己放電が少な
くなって電池容量の低下が減少し、保存特性に優れた非
水電解液電池が得られた。As described above in detail, in the nonaqueous electrolyte battery according to the present invention, an additive containing at least one of polystyrene and polybutadiene is added to the nonaqueous electrolyte. Water in the non-aqueous electrolyte is surrounded by water and polybutadiene, which suppresses the reaction between the negative electrode, etc. and the water in the non-aqueous electrolyte during charging, reduces self-discharge during storage, and reduces battery capacity As a result, a nonaqueous electrolyte battery having excellent storage characteristics was obtained.
【図１】この発明の実施例及び比較例において作製した
非水電解液二次電池の内部構造を示した断面説明図であ
る。FIG. 1 is an explanatory cross-sectional view showing an internal structure of a non-aqueous electrolyte secondary battery produced in Examples and Comparative Examples of the present invention.
【図２】この発明の実験例及び比較例１の非水電解液二
次電池において、非水電解液に対するポリスチレンの添
加量と、保存後における非水電解液二次電池の放電容量
との関係を示した図である。FIG. 2 shows the relationship between the amount of polystyrene added to the non-aqueous electrolyte and the discharge capacity of the non-aqueous electrolyte secondary battery after storage in the non-aqueous electrolyte secondary batteries of Experimental Example and Comparative Example 1 of the present invention. FIG.
１ 正極 ２ 負極 1 Positive electrode 2 Negative electrode
フロントページの続き (72)発明者 能間 俊之 大阪府守口市京阪本通２丁目５番５号 三 洋電機株式会社内 (72)発明者 西尾 晃治 大阪府守口市京阪本通２丁目５番５号 三 洋電機株式会社内Continued on the front page (72) Inventor Toshiyuki Noma 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Koji Nishio 2-5-2-5 Keihanhondori, Moriguchi-shi, Osaka No. Sanyo Electric Co., Ltd.
Claims (2)
非水電解液電池において、上記の非水電解液中に、ポリ
スチレンとポリブタジエンの少なくとも１種を含む添加
剤を添加したことを特徴とする非水電解液電池。1. A non-aqueous electrolyte battery comprising a positive electrode, a negative electrode, and a non-aqueous electrolyte, wherein an additive containing at least one of polystyrene and polybutadiene is added to the non-aqueous electrolyte. Non-aqueous electrolyte battery characterized by the following.
いて、上記の添加剤を非水電解液中に４０．０〜６０．
０重量％の範囲で添加したことを特徴とする非水電解液
電池。2. The non-aqueous electrolyte battery according to claim 1, wherein the additive is contained in the non-aqueous electrolyte in an amount of 40.0 to 60.000.
A nonaqueous electrolyte battery characterized by being added in a range of 0% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8186653A JPH1012276A (en) | 1996-06-26 | 1996-06-26 | Nonaqueous electrolyte battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8186653A JPH1012276A (en) | 1996-06-26 | 1996-06-26 | Nonaqueous electrolyte battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1012276A true JPH1012276A (en) | 1998-01-16 |
Family
ID=16192345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8186653A Pending JPH1012276A (en) | 1996-06-26 | 1996-06-26 | Nonaqueous electrolyte battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1012276A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1049186A1 (en) * | 1998-10-16 | 2000-11-02 | Matsushita Electric Industrial Co., Ltd. | Molded solid electrolyte, molded electrode, and electrochemical element |
| JP2009283581A (en) * | 2008-05-21 | 2009-12-03 | Nichicon Corp | Driving electrolyte for electrolytic capacitor |
| JP2010198888A (en) * | 2009-02-25 | 2010-09-09 | Hitachi Ltd | Lithium ion secondary battery |
-
1996
- 1996-06-26 JP JP8186653A patent/JPH1012276A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1049186A1 (en) * | 1998-10-16 | 2000-11-02 | Matsushita Electric Industrial Co., Ltd. | Molded solid electrolyte, molded electrode, and electrochemical element |
| EP1049186A4 (en) * | 1998-10-16 | 2005-04-20 | Jsr Corp | Molded solid electrolyte, molded electrode, and electrochemical element |
| JP2009283581A (en) * | 2008-05-21 | 2009-12-03 | Nichicon Corp | Driving electrolyte for electrolytic capacitor |
| JP2010198888A (en) * | 2009-02-25 | 2010-09-09 | Hitachi Ltd | Lithium ion secondary battery |
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