JPH1154149A - Non-aqueous electrolyte battery - Google Patents
Non-aqueous electrolyte batteryInfo
- Publication number
- JPH1154149A JPH1154149A JP9213488A JP21348897A JPH1154149A JP H1154149 A JPH1154149 A JP H1154149A JP 9213488 A JP9213488 A JP 9213488A JP 21348897 A JP21348897 A JP 21348897A JP H1154149 A JPH1154149 A JP H1154149A
- Authority
- JP
- Japan
- Prior art keywords
- battery
- aqueous electrolyte
- cellulose
- negative electrode
- cellulose derivative
- 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.)
- Granted
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
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- Primary Cells (AREA)
- Secondary Cells (AREA)
Abstract
(57)【要約】
【課題】 高容量で、且つ自己放電率の低い非水電解質
二次電池を提供する。
【解決手段】 非水電解質を使用する電池において、電
解液にセルロース誘導体を溶解させた非水電解質電池を
構成する。セルロース誘導体としてメチルセルロース、
ヒドロキシエチルセルロース、ヒドロキシプロピルセル
ロース等を用いる。電池構成は負極カップ１、負極ペレ
ット２、ポリプロピレン製の薄膜のセパレータ３、正極
ペレット４、ガスケット５、および正極缶６で構成され
る。正極ペレット４、セパレータ３、負極ペレット２か
らなる順で積層し、セルロース誘導体を溶解させた電解
液を注入し、かしめて、リチウムイオンコイン型電池を
作成する。
(57) [Problem] To provide a non-aqueous electrolyte secondary battery having a high capacity and a low self-discharge rate. SOLUTION: In a battery using a non-aqueous electrolyte, a non-aqueous electrolyte battery in which a cellulose derivative is dissolved in an electrolytic solution is constituted. Methyl cellulose as a cellulose derivative,
Hydroxyethyl cellulose, hydroxypropyl cellulose and the like are used. The battery configuration includes a negative electrode cup 1, a negative electrode pellet 2, a thin-film separator 3 made of polypropylene, a positive electrode pellet 4, a gasket 5, and a positive electrode can 6. A positive electrode pellet 4, a separator 3, and a negative electrode pellet 2 are laminated in this order, and an electrolyte solution in which a cellulose derivative is dissolved is injected and caulked to form a lithium ion coin battery.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は高容量で、且つ高温
保存特性に優れた非水電解質電池に関する。The present invention relates to a non-aqueous electrolyte battery having a high capacity and excellent high-temperature storage characteristics.
【０００２】[0002]
【従来の技術】近年、ビデオカメラ等のポータブル機器
の普及に伴い、使い捨ての一次電池に替わって繰り返し
使用可能な二次電池に対する需要が高まってきている。
現在使用されている二次電池の殆どは、アルカリ電解液
を用いたニッケルカドミウム電池である。しかし、この
電池の電圧は約１．２Ｖであるため、電池のエネルギー
密度を更に向上させることは困難であった。また、常温
での自己放電率が１ケ月で２０％以上と高い問題点もあ
った。2. Description of the Related Art In recent years, with the spread of portable devices such as video cameras, demand for secondary batteries that can be used repeatedly instead of disposable primary batteries has been increasing.
Most of the secondary batteries currently used are nickel cadmium batteries using an alkaline electrolyte. However, since the voltage of this battery is about 1.2 V, it has been difficult to further improve the energy density of the battery. There was also a problem that the self-discharge rate at room temperature was as high as 20% or more in one month.
【０００３】そこで、電解液に非水溶媒を使用し、ま
た、負極にリチウム等の軽金属を使用することにより電
圧を３Ｖ以上に高めてエネルギー密度を高くし、更に自
己放電率の低い非水電解質二次電池が検討されてきた。
しかしながら、このような二次電池では、負極に用いる
金属リチウム等が充放電の繰り返しによりデンドライト
状に成長して正極と接触し、この結果、電池内部におい
て短絡が生じ寿命が短いという欠点を有し、実用化が困
難であった。[0003] Therefore, by using a non-aqueous solvent for the electrolyte and using a light metal such as lithium for the negative electrode, the voltage is increased to 3 V or more to increase the energy density, and further, the non-aqueous electrolyte having a low self-discharge rate is used. Secondary batteries have been considered.
However, such a secondary battery has a disadvantage that lithium metal or the like used for the negative electrode grows in a dendrite shape by repeated charge and discharge and comes into contact with the positive electrode, and as a result, a short circuit occurs inside the battery and the life is short. It was difficult to put it to practical use.
【０００４】このため、リチウム等を他の金属と合金化
し、この合金を負極に使用するようにした非水電解質二
次電池が検討された。しかしこの場合も、合金が充放電
を繰り返すことにより微細粒子となり、やはり寿命が短
くなるという欠点があった。For this reason, a non-aqueous electrolyte secondary battery in which lithium or the like is alloyed with another metal and this alloy is used for a negative electrode has been studied. However, also in this case, there is a disadvantage that the alloy becomes fine particles due to repeated charge and discharge, and the life is also shortened.
【０００５】また、上述した欠点を改善するために、例
えば特開昭６２−９０８６３号公報に開示されているよ
うに、コークス等の炭素質材料を負極活物質として使用
する非水電解質二次電池が提案されている。この二次電
池は負極における上述したような欠点がないためサイク
ル寿命特性に優れている。また、正極活物質として本発
明者等が特開昭６３−１３５０９９号公報で開示したよ
うにＬｉｘＭＯ2 （Ｍは１種類または１種類よりも多い
遷移金属を表し、また、０．０５≦ｘ≦１．１０であ
る）を用いると、電池寿命が向上し、エネルギー密度の
高い非水電解質二次電池を形成できることが示されてい
る。[0005] Further, in order to improve the above-mentioned drawbacks, for example, as disclosed in Japanese Patent Application Laid-Open No. 62-90863, a non-aqueous electrolyte secondary battery using a carbonaceous material such as coke as a negative electrode active material. Has been proposed. Since this secondary battery does not have the above-mentioned disadvantages of the negative electrode, it has excellent cycle life characteristics. As the positive electrode active material, LixMO 2 (M represents one or more transition metals as disclosed by the present inventors in Japanese Patent Application Laid-Open No. 63-135099, and 0.05 ≦ x ≦ It is shown that the use of (1.10) can improve the battery life and form a non-aqueous electrolyte secondary battery having a high energy density.
【０００６】ところで、通常、非水電解質電池用の電解
液はエステル、エーテル等の溶剤に、電解質として６フ
ッ化燐酸リチウム等を溶解させて用いられていて、高温
になるにつれて導電率が向上し電気特性が向上するが、
副反応も増加し自己放電や容量劣化が大きくなるという
問題点があった。[0006] In general, an electrolyte for a non-aqueous electrolyte battery is used by dissolving lithium hexafluorophosphate or the like as an electrolyte in a solvent such as an ester or an ether. Although the electrical characteristics are improved,
There is a problem that side reactions increase and self-discharge and capacity deterioration increase.
【０００７】[0007]
【発明が解決しようとする課題】従って本発明の課題
は、炭素質材料を負極活物質に用いた非水電解質電池で
あって、高容量で、且つ、高温保存特性、安全性に優れ
た電池を提供しようとするものである。SUMMARY OF THE INVENTION Accordingly, an object of the present invention is a non-aqueous electrolyte battery using a carbonaceous material as a negative electrode active material, which has a high capacity, excellent high-temperature storage characteristics, and excellent safety. It is intended to provide.
【０００８】[0008]
【課題を解決するための手段】本発明は上記課題に鑑み
なされたものであり、非水電解質を使用する電池におい
て、電解液にセルロース誘導体を溶解させた非水電解質
電池を構成する。また、前記セルロース誘導体としてメ
チルセルロース、ヒドロキシエチルセルロース、ヒドロ
キシプロピルセルロース等を用いて上記課題を解決す
る。SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and provides a nonaqueous electrolyte battery in which a cellulose derivative is dissolved in an electrolytic solution in a battery using a nonaqueous electrolyte. Further, the above-mentioned problem is solved by using methylcellulose, hydroxyethylcellulose, hydroxypropylcellulose and the like as the cellulose derivative.
【０００９】電解液にセルロース誘導体を添加すること
により、高容量で、且つ、高温保存特性、安全性に優れ
た非水電解質電池を形成する。By adding a cellulose derivative to the electrolyte, a non-aqueous electrolyte battery having high capacity, high-temperature storage characteristics and excellent safety is formed.
【００１０】[0010]
【発明の実施の形態】本発明者は鋭意検討の結果、前述
した炭素質材料を用い、電解液にセルロース誘導体を添
加することにより、高容量で、且つ、高温保存特性、安
全性に優れた非水電解質電池の作製が可能であることを
見い出した。BEST MODE FOR CARRYING OUT THE INVENTION As a result of intensive studies, the present inventor has found that by using the above-mentioned carbonaceous material and adding a cellulose derivative to an electrolytic solution, a high capacity, excellent high-temperature storage characteristics, and excellent safety can be obtained. It has been found that a nonaqueous electrolyte battery can be manufactured.
【００１１】つぎに、本発明の実施の形態について、非
水電解質二次電池に関して説明するが、本発明は二次電
池に限定されるものではない。Next, an embodiment of the present invention will be described with respect to a non-aqueous electrolyte secondary battery, but the present invention is not limited to a secondary battery.
【００１２】まず、負極活物質の炭素質材料として原材
料を所定の温度、雰囲気にて焼結、または焼成後粉砕し
た炭素粉体を使用する。この出発原料として石油ピッ
チ、バインダーピッチ、高分子樹脂、グリーンコークス
等、また、完全に炭素化した黒鉛、熱分解炭素類、コー
クス類（石炭コークス、ピッチコークス、石油コークス
等）、カーボンブラック（アセチレンブラック等）、ガ
ラス状炭素、有機高分子材料焼成体（有機高分子材料を
不活性ガス気流中、或いは真空中で５００℃以上の適当
な温度で焼成したもの）、炭素繊維等と樹脂分を含んだ
ピッチ類や、焼結性の高い樹脂、例えばフラン樹脂、ジ
ビニルベンゼン、ポリフッ化ビニリデン、ポリ塩化ビニ
リデン等を使用し、混合体を作成した後、焼成体を作成
し、粉砕等の粒度調整して炭素粉体を形成する。First, as the carbonaceous material of the negative electrode active material, a carbon powder obtained by sintering or sintering a raw material at a predetermined temperature and atmosphere, and then pulverizing the material is used. As starting materials, petroleum pitch, binder pitch, polymer resin, green coke, etc., fully carbonized graphite, pyrolytic carbons, cokes (coal coke, pitch coke, petroleum coke, etc.), carbon black (acetylene) Black), glassy carbon, fired organic polymer material (fired organic polymer material in an inert gas stream or vacuum at a suitable temperature of 500 ° C. or more), carbon fiber, etc. and resin Using pitches and resins with high sintering properties, such as furan resin, divinylbenzene, polyvinylidene fluoride, polyvinylidene chloride, etc., make a mixture, then create a fired body and adjust the particle size by grinding, etc. To form a carbon powder.
【００１３】一方、正極にはＬｉｘＭＯ2 （ここでＭは
一種類以上の遷移金属、好ましくはＣｏ、Ｎｉ、Ｆｅの
中の一種を表し、また、ｘは０．０５≦ｘ≦１．１０の
範囲である。）を含んだ活物質を使用する。かかる活物
質としてはＬｉＣｏＯ2 、ＬｉＮｉＯ2 、ＬｉＮｉｙＣ
ｏ（１−ｙ）Ｏ2 （但し、０．０５≦ｘ≦１．１０、０
＜ｙ＜１）で表される複合酸化物が挙げられる。また、
ＬｉＭｎ2 Ｏ4 を用いることも可能である。On the other hand, LixMO 2 (where M represents one or more transition metals, preferably one of Co, Ni and Fe, and x represents 0.05 ≦ x ≦ 1.10. Range) is used. Such active materials include LiCoO 2 , LiNiO 2 , LiNiyC
o (1-y) O 2 (provided that 0.05 ≦ x ≦ 1.10, 0
And a composite oxide represented by <y <1). Also,
It is also possible to use LiMn 2 O 4 .
【００１４】前記複合酸化物は例えばリチウム、コバル
ト、ニッケル等の炭酸塩を組成に応じて混合し、酸素存
在雰囲気下、６００℃〜１０００℃の温度範囲で焼成す
ることにより得られる。尚、出発原料は炭酸塩に限定す
ることなく、水酸化物、酸化物からも同様に合成が可能
である。The above-mentioned composite oxide is obtained by mixing carbonates such as lithium, cobalt and nickel according to the composition, and firing the mixture in an oxygen-containing atmosphere at a temperature in the range of 600 ° C. to 1000 ° C. The starting materials are not limited to carbonates, but can be similarly synthesized from hydroxides and oxides.
【００１５】電解液も、有機溶剤に電解質を溶解したも
のであれば、従来から知られているものがいずれも使用
できる。従って有機溶剤としては例えばプロピレンカー
ボネート、エチレンカーボネート、γ−ブチルラクトン
等のエステル類や、ジエチルエーテル、テトラヒドロフ
ラン、置換テトラヒドロフラン、ジオキソラン、ピラン
およびその誘導体、ジメトキシエタン、ジエトキシエタ
ン等のエーテル類や、３−メチル−２−オキサゾリジノ
ン等の３置換−２−オキサゾリジノン類や、スルホラ
ン、メチルスルホラン、アセトニトリル、プロピオニト
ル等が挙げられ、これらを単独もしくは２種類以上を混
合して使用する。As the electrolytic solution, any conventionally known one can be used as long as the electrolyte is dissolved in an organic solvent. Accordingly, examples of the organic solvent include esters such as propylene carbonate, ethylene carbonate and γ-butyl lactone; ethers such as diethyl ether, tetrahydrofuran, substituted tetrahydrofuran, dioxolan, pyran and derivatives thereof, dimethoxyethane and diethoxyethane; Examples include 3-substituted-2-oxazolidinones such as -methyl-2-oxazolidinone, sulfolane, methylsulfolane, acetonitrile, propionitr and the like, and these are used alone or in combination of two or more.
【００１６】また、電解質として、過塩素酸リチウム、
ホウフッ化リチウム、リンフッ化リチウム、塩化アルミ
ン酸リチウム、ハロゲン化リチウム、トリフルオロメタ
ンスルホン酸リチウム等が使用できる。Further, as an electrolyte, lithium perchlorate;
Lithium borofluoride, lithium phosphofluoride, lithium chloride aluminate, lithium halide, lithium trifluoromethanesulfonate and the like can be used.
【００１７】[0017]
【実施例】つぎに実施例について説明するが、本発明は
これら実施例に限定されるものではない。EXAMPLES Next, examples will be described, but the present invention is not limited to these examples.
【００１８】実施例１ まず、正極ペレットを以下のように作成した。正極化合
物は、炭酸リチウム０．５モルと炭酸コバルト１モルと
を混合し、９００℃の空気中で５時間焼成することによ
りＬｉＣｏＯ2 を得た。このＬｉＣｏＯ2 を粉砕するこ
とによって平均粒径１０μｍの粉体を得た。つぎに、こ
のＬｉＣｏＯ2 を９１重量部と、導電剤としてグラファ
イトを６重量部と、結着剤としてポリフッ化ビニリデン
を３重量部とを混合し、これにＮ−メチルピロリドンを
分散剤として加えて、ペーストを作成した。その後、こ
のペーストを乾燥し、５トンにて成形して体積密度ｄ＝
３．５ｇ／ｃｍ3 、直径が１５．５ｍｍの正極ペレット
を得た。 Example 1 First, a positive electrode pellet was prepared as follows. As the positive electrode compound, 0.5 mol of lithium carbonate and 1 mol of cobalt carbonate were mixed and calcined in air at 900 ° C. for 5 hours to obtain LiCoO 2 . By pulverizing this LiCoO 2 , a powder having an average particle size of 10 μm was obtained. Next, 91 parts by weight of this LiCoO 2 , 6 parts by weight of graphite as a conductive agent, and 3 parts by weight of polyvinylidene fluoride as a binder were mixed, and N-methylpyrrolidone was added as a dispersant thereto. , Created a paste. Thereafter, the paste was dried, molded at 5 tons, and the volume density d =
A positive electrode pellet having a diameter of 3.5 g / cm 3 and a diameter of 15.5 mm was obtained.
【００１９】つぎに負極ペレットを以下のように作成し
た。炭素材料は出発原料として石油ピッチを用い、これ
に酸素を含む官能基を１０〜２０重量％導入した後、不
活性ガス気流中、温度１０００℃で焼成してガラス状カ
ーボンに近い性質を持った炭素質材料を得た。この材料
についてＸ線回折測定を行った結果、（００２）面の面
間隔は３．７６Åであり、ピクノメータの測定により真
比重は１．５８ｇ／ｃｍ3 であった。この炭素質材料を
粉砕し、平均粒径が１０μｍの粉末とした。Next, a negative electrode pellet was prepared as follows. As a carbon material, petroleum pitch was used as a starting material, and after introducing 10 to 20% by weight of a functional group containing oxygen into the material, it was fired at a temperature of 1000 ° C. in an inert gas stream to have properties similar to glassy carbon. A carbonaceous material was obtained. As a result of X-ray diffraction measurement of this material, the (002) plane spacing was 3.76 °, and the true specific gravity was 1.58 g / cm 3 as measured by a pycnometer. This carbonaceous material was pulverized into a powder having an average particle size of 10 μm.
【００２０】このようにして得た炭素質材料粉末を負極
活物質担持体とし、この炭素材料を９０重量部と結着剤
としてポリフッ化ビニリデンを１０重量部の割合で混合
し、これにＮ−メチルピロリドンを分散剤として加え
て、ペーストを作成した。その後、このペーストを乾燥
し、直径が１６．０ｍｍの負極ペレットを得た。The carbonaceous material powder thus obtained is used as a negative electrode active material carrier, and 90 parts by weight of this carbon material and 10 parts by weight of polyvinylidene fluoride as a binder are mixed. Methyl pyrrolidone was added as a dispersant to make a paste. Thereafter, the paste was dried to obtain negative electrode pellets having a diameter of 16.0 mm.
【００２１】電解液として、炭酸エチレンとジエチルカ
ーボネイトとの混合液にＬｉＰＦ6を１モル／リットル
溶解し、添加剤としてセルロース誘導体の中で炭酸エス
テルに溶解することが可能であるメチルセルロースを１
重量％溶解させたものを用いた。As an electrolytic solution, 1 mol / liter of LiPF 6 is dissolved in a mixed solution of ethylene carbonate and diethyl carbonate, and as an additive, methyl cellulose, which can be dissolved in a carbonate ester among cellulose derivatives, is added.
What was dissolved by weight% was used.
【００２２】上述した正極ペレットと負極ペレット用い
た二次電池は図１に示すように、負極カップ１、前記負
極活物質による負極ペレット２、ポリプロピレン製の薄
膜のセパレータ３、前述した正極ペレット４、ガスケッ
ト５、および正極缶６から構成されている。正極ペレッ
ト４、セパレータ３、負極ペレット２からなる順で積層
し、電解液を注入し、かしめてＣＲ２０２５型と同一形
状の直径が２０ｍｍ、厚みが２．５ｍｍのリチウムイオ
ンコイン型電池を作成した。As shown in FIG. 1, a secondary battery using the above-described positive and negative electrode pellets has a negative electrode cup 1, a negative electrode pellet 2 made of the negative electrode active material, a thin film separator 3 made of polypropylene, It comprises a gasket 5 and a positive electrode can 6. The positive electrode pellet 4, the separator 3, and the negative electrode pellet 2 were laminated in this order, and an electrolytic solution was injected and caulked to form a lithium ion coin battery having the same shape as the CR2025 type having a diameter of 20 mm and a thickness of 2.5 mm.
【００２３】実施例２ 電解液に添加するセルロース誘導体としてヒドロキシエ
チルセルロースを用いたこと以外は実施例１と同様にし
てリチウムイオンコイン型電池を作成した。 Example 2 A lithium ion coin-type battery was prepared in the same manner as in Example 1 except that hydroxyethyl cellulose was used as the cellulose derivative to be added to the electrolytic solution.
【００２４】実施例３ 電解液に添加するセルロース誘導体としてヒドロキシプ
ロピルセルロースを用いたこと以外は実施例１と同様に
してリチウムイオンコイン型電池を作成した。 Example 3 A lithium ion coin-type battery was prepared in the same manner as in Example 1 except that hydroxypropyl cellulose was used as the cellulose derivative to be added to the electrolytic solution.
【００２５】実施例４ 電解液に添加するセルロース誘導体としてヒドロキシエ
チルセルロースを用い、０．１重量％の割合で溶解させ
たこと以外は実施例１と同様にしてリチウムイオンコイ
ン型電池を作成した。 Example 4 A lithium ion coin-type battery was prepared in the same manner as in Example 1, except that hydroxyethyl cellulose was used as a cellulose derivative to be added to the electrolytic solution and dissolved at a ratio of 0.1% by weight.
【００２６】実施例５ 電解液に添加するセルロース誘導体としてヒドロキシエ
チルセルロースを用い、３重量％の割合で溶解させたこ
と以外は実施例１と同様にしてリチウムイオンコイン型
電池を作成した。 Example 5 A lithium ion coin-type battery was prepared in the same manner as in Example 1 except that hydroxyethyl cellulose was used as a cellulose derivative to be added to the electrolytic solution and dissolved at a ratio of 3% by weight.
【００２７】比較例１ 電解液に添加剤を加えず、それ以外は実施例１と同様に
してリチウムイオンコイン型電池を作成した。 Comparative Example 1 A lithium ion coin-type battery was prepared in the same manner as in Example 1 except that no additive was added to the electrolytic solution.
【００２８】比較例２ 電解液に添加するセルロース誘導体としてヒドロキシエ
チルセルロースを用い、５重量％の割合で溶解させたこ
と以外は実施例１と同様にしてリチウムイオンコイン型
電池を作成した。 Comparative Example 2 A lithium ion coin-type battery was prepared in the same manner as in Example 1 except that hydroxyethyl cellulose was used as a cellulose derivative to be added to the electrolytic solution and was dissolved at a ratio of 5% by weight.
【００２９】上述した実施例１〜５と比較例１〜２の非
水電解質二次電池について、充電電流１ｍＡ、終止電圧
４．２Ｖまでの定電流充電を行い、つぎに、放電電流３
ｍＡ、終止電圧２．５Ｖまでの定電流放電を行い、充放
電のテストを行った。また、充電状態にて８５℃、１０
日間保存後の容量、保存後の回復容量を測定した。その
結果を表１に示す。The non-aqueous electrolyte secondary batteries of Examples 1 to 5 and Comparative Examples 1 and 2 were charged at a constant current up to a charging current of 1 mA and a final voltage of 4.2 V.
A constant current discharge was performed up to a mA and a final voltage of 2.5 V to perform a charge / discharge test. In addition, 85 ° C, 10
The capacity after storage for one day and the recovery capacity after storage were measured. Table 1 shows the results.
【００３０】[0030]
【表１】 [Table 1]
【００３１】表１より、本実施例は保存後の容量、保存
後の回復容量が優れていることが分かる。これはセルロ
ース誘導体を電解液中に溶解させた場合、高温、特に６
０℃以上でセルロースと電解液がゲル化し、導電率が低
下することにより副反応が抑制され、保存、回復特性が
向上するためと推測される。From Table 1, it can be seen that this embodiment is excellent in the capacity after storage and the recovery capacity after storage. This is because when the cellulose derivative is dissolved in the electrolytic solution, the temperature is high, especially 6 ° C.
It is presumed that the cellulose and the electrolytic solution gel at 0 ° C. or higher, and the side reaction is suppressed due to the decrease in the conductivity, and the storage and recovery characteristics are improved.
【００３２】一方、比較例２の結果に示されるように過
大な量のセルロース誘導体（ヒドロキシエチルセルロー
ス）を添加すると初期容量、保存後の容量、保存後の回
復容量の低下が認められ、おのずと添加割合の最適な範
囲があることが想定され、最適な効果を得るためには添
加量の調整が必要であることは当然である。On the other hand, as shown in the results of Comparative Example 2, when an excessive amount of the cellulose derivative (hydroxyethylcellulose) was added, the initial capacity, the capacity after storage, and the recovery capacity after storage were reduced. It is assumed that there is an optimum range, and it is natural that the addition amount needs to be adjusted in order to obtain the optimum effect.
【００３３】上述した実施例において１種類の炭素質材
料を用いたが、これに限定するものではない。また、リ
チウム金属、リチウム合金、リチウム含有酸化物、その
他のリチウム系の負極を有する電池にも適用することが
できる。さらに一次電池に本発明を適用しても効果は大
きい。Although one type of carbonaceous material is used in the above-described embodiment, the present invention is not limited to this. Further, the present invention can be applied to a battery having a lithium metal, a lithium alloy, a lithium-containing oxide, or another lithium-based negative electrode. Further, even if the present invention is applied to a primary battery, the effect is great.
【００３４】尚、本実施例ではコイン型非水電解質二次
電池を作成して、本発明を検証したが、角形の電池、或
いは渦巻き状の電極形態を有する電池等、他の形状の電
池に用いてもよいことは当然である。In the present embodiment, a coin-type non-aqueous electrolyte secondary battery was prepared to verify the present invention. However, the present invention is applied to a battery having another shape such as a rectangular battery or a battery having a spiral electrode configuration. Of course, it may be used.
【００３５】[0035]
【発明の効果】以上の説明からも明らかなように、電解
液にセルロース誘導体であるメチルセルロース、ヒドロ
キシエチルセルロース、ヒドロキシプロピルセルロース
を添加することにより、高温環境での保存後の容量、保
存後の回復容量が増加し、自己放電率の小さな非水電解
質電池を提供することが可能となる。As is clear from the above description, by adding the cellulose derivatives methylcellulose, hydroxyethylcellulose and hydroxypropylcellulose to the electrolytic solution, the capacity after storage in a high-temperature environment and the recovery capacity after storage are obtained. And a non-aqueous electrolyte battery having a small self-discharge rate can be provided.
【図１】 本発明による非水電解質二次電池の断面図で
ある。FIG. 1 is a cross-sectional view of a non-aqueous electrolyte secondary battery according to the present invention.
１…負極カップ、２…負極ペレット、３…セパレータ、
４…正極ペレット、５…ガスケット、６…正極缶1 ... Negative electrode cup, 2 ... Negative electrode pellet, 3 ... Separator,
4: Positive electrode pellet, 5: Gasket, 6: Positive electrode can
Claims (4)
る非水電解質電池。1. A non-aqueous electrolyte battery using a non-aqueous electrolyte, wherein a cellulose derivative is dissolved in an electrolytic solution.
スであることを特徴とする、請求項１に記載の非水電解
質電池。2. The non-aqueous electrolyte battery according to claim 1, wherein the cellulose derivative is methyl cellulose.
ルセルロースであることを特徴とする、請求項１に記載
の非水電解質電池。3. The non-aqueous electrolyte battery according to claim 1, wherein the cellulose derivative is hydroxyethyl cellulose.
ピルセルロースであることを特徴とする、請求項１に記
載の非水電解質電池。4. The non-aqueous electrolyte battery according to claim 1, wherein the cellulose derivative is hydroxypropyl cellulose.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21348897A JP3837726B2 (en) | 1997-08-07 | 1997-08-07 | battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21348897A JP3837726B2 (en) | 1997-08-07 | 1997-08-07 | battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1154149A true JPH1154149A (en) | 1999-02-26 |
| JP3837726B2 JP3837726B2 (en) | 2006-10-25 |
Family
ID=16640036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21348897A Expired - Fee Related JP3837726B2 (en) | 1997-08-07 | 1997-08-07 | battery |
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| Country | Link |
|---|---|
| JP (1) | JP3837726B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000306600A (en) * | 1999-04-19 | 2000-11-02 | Matsushita Electric Ind Co Ltd | Non-aqueous electrolyte secondary battery |
| CN116190777A (en) * | 2022-12-20 | 2023-05-30 | 重庆太蓝新能源有限公司 | Cellulose-based eutectic gel electrolyte, its preparation method and application |
| JP2023146947A (en) * | 2022-03-29 | 2023-10-12 | 旭化成株式会社 | Non-aqueous secondary battery |
| JP2023147041A (en) * | 2022-03-29 | 2023-10-12 | 旭化成株式会社 | Non-aqueous secondary battery |
-
1997
- 1997-08-07 JP JP21348897A patent/JP3837726B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000306600A (en) * | 1999-04-19 | 2000-11-02 | Matsushita Electric Ind Co Ltd | Non-aqueous electrolyte secondary battery |
| JP2023146947A (en) * | 2022-03-29 | 2023-10-12 | 旭化成株式会社 | Non-aqueous secondary battery |
| JP2023147041A (en) * | 2022-03-29 | 2023-10-12 | 旭化成株式会社 | Non-aqueous secondary battery |
| CN116190777A (en) * | 2022-12-20 | 2023-05-30 | 重庆太蓝新能源有限公司 | Cellulose-based eutectic gel electrolyte, its preparation method and application |
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| Publication number | Publication date |
|---|---|
| JP3837726B2 (en) | 2006-10-25 |
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