JP3108142B2 - Non-aqueous electrolyte battery - Google Patents
Non-aqueous electrolyte batteryInfo
- Publication number
- JP3108142B2 JP3108142B2 JP03220347A JP22034791A JP3108142B2 JP 3108142 B2 JP3108142 B2 JP 3108142B2 JP 03220347 A JP03220347 A JP 03220347A JP 22034791 A JP22034791 A JP 22034791A JP 3108142 B2 JP3108142 B2 JP 3108142B2
- Authority
- JP
- Japan
- Prior art keywords
- separator
- battery
- aqueous electrolyte
- positive electrode
- electrolyte 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.)
- Expired - Fee Related
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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Description
【０００１】[0001]
【産業上の利用分野】本発明は、リチウム、ナトリウム
などの軽金属や、リチウム−アルミニウム合金などの軽
金属合金や、リチウムイオンなどの活物質イオンをド−
プした材料を用いた負極と、金属の酸化物、硫化物、ハ
ロゲン化物などを活物質とする正極と、これら正負極間
に介挿するセパレータとを具備する非水電解液電池に関
するものである。The present invention relates to light metals such as lithium and sodium, and light metals such as lithium-aluminum alloys.
Active material ions such as metal alloys and lithium ions
The present invention relates to a non-aqueous electrolyte battery including a negative electrode using a material that has been pressed, a positive electrode using a metal oxide, sulfide, halide, or the like as an active material, and a separator interposed between the positive and negative electrodes. .
【０００２】[0002]
【従来の技術】リチウムまたはリチウム合金を活物質と
する負極を用いた非水電解液電池は、高エネルギー密度
を有し、且つ、自己放電が少ないという利点がある。2. Description of the Related Art A non-aqueous electrolyte battery using a negative electrode containing lithium or a lithium alloy as an active material has the advantages of high energy density and low self-discharge.
【０００３】近年、この種の電池の電解液には、有機溶
媒に、ＬｉＣＦ3ＳＯ3、ＬｉＣｌＯ 4、ＬｉＰＦ6、Ｌｉ
ＡｓＦ6などのリチウム塩を溶解したものを用いてい
る。そして、この電解液の電気伝導度は、アルカリマン
ガン電池などに用いられている水溶液系電解液に比べて
数１０分の１〜１００分の１程度と低くなっている。こ
のため、非水電解液電池をカメラ用電源などの大出力用
途に使用する場合には、電極体を渦巻状に構成して正負
極間の対向面積を大きくし、更に、正負極間の抵抗を下
げるために、セパレータは、特開昭６０−２３９５４号
公報に見られるように、膜厚が薄く、且つ均一な構造を
有する微多孔膜を用いる必要がある。[0003] In recent years, organic electrolytes have been added to the electrolyte of this type of battery.
LiCFThreeSOThree, LiClO Four, LiPF6, Li
AsF6Using lithium salt dissolved
You. And the electric conductivity of this electrolytic solution is
Compared to aqueous electrolytes used in gun batteries, etc.
It is as low as several tens to one hundredth. This
Therefore, non-aqueous electrolyte batteries are used for large output such as power supply for camera
When used in a different way, configure the electrode body in a spiral
Increase the facing area between the poles and lower the resistance between the positive and negative electrodes.
In order to achieve this, the separator is disclosed in Japanese Patent Application Laid-Open No. 60-23954.
As seen in the gazette, a thin and uniform structure
It is necessary to use a microporous membrane having the same.
【０００４】しかしながら、膜厚の薄い微多孔膜セパレ
ータを用いた場合には、渦巻電極体を構成する際に、主
に正極粉末によって、セパレータが圧接力を受けて、膜
厚の薄くなる部分が生じ、一部は正極粉末がセパレータ
を破り、直接負極に接触することがある。このような渦
巻電極体を電池に組み込むと、開路電圧が低下して、不
良電池の発生の一因になる。However, when a microporous membrane separator having a small thickness is used, when the spiral electrode body is formed, a portion where the thickness of the separator is reduced due to the pressing force of the separator mainly due to the positive electrode powder. In some cases, the positive electrode powder may break the separator and directly contact the negative electrode. When such a spiral electrode body is incorporated in a battery, the open-circuit voltage is reduced, which causes a defective battery.
【０００５】この不良電池の発生率を低下させるために
は、膜厚の厚いセパレータを用いればよいが、正負極間
距離が長くなって、抵抗成分が増加し、且つ電池内に充
填できる活物質量が減少するために、電池の放電による
寿命が短くなる。In order to lower the incidence of defective batteries, a separator having a large thickness may be used, but the distance between the positive electrode and the negative electrode is increased, the resistance component is increased, and the active material that can be filled in the battery is used. Due to the reduced volume, the life of the battery due to discharge is shortened.
【０００６】[0006]
【発明が解決しようとする課題】本発明は、非水電解液
電池の寿命を低下させることなく、セパレータの圧接強
度を向上させ、不良電池の発生率を減少させようとする
ものである。SUMMARY OF THE INVENTION An object of the present invention is to improve the pressure contact strength of a separator and reduce the incidence of defective batteries without reducing the life of a non-aqueous electrolyte battery.
【０００７】[0007]
【課題を解決するための手段】本発明の非水電解液電池
は、軽金属、軽金属合金または活物質イオンをド−プし
た材料を用いた負極と、正極と、これら正負極間に介挿
されるセパレータとを渦巻状に巻回してなる電極体及び
非水電解液を備え、前記セパレータの材質をポリエチレ
ンとし、且つ、ポリエチレン原料の数平均分子量３５万
以上としたことを特徴とするものである。A nonaqueous electrolyte battery according to the present invention comprises a negative electrode using a light metal , a light metal alloy or a material doped with active material ions, a positive electrode, and a positive electrode and a negative electrode. An electrode body formed by spirally winding a separator and a non-aqueous electrolyte are provided, and the material of the separator is polyethylene, and the number average molecular weight of the polyethylene raw material is 350,000 or more.
【０００８】[0008]
【作用】数平均分子量が大きなポリエチレン原料を用い
てセパレータを構成することにより、セパレータ内での
高分子鎖の絡み合いが多くなって、セパレータの圧接強
度が大きくなり、渦巻電極体を構成した際に生じる圧接
力などに対する耐性が向上し、これによって、活物質粉
末がセパレータを破ることに起因する不良電池の発生率
を減少させることができる。[Function] By forming a separator using a polyethylene raw material having a large number average molecular weight, the entanglement of the polymer chains in the separator increases, the press-contact strength of the separator increases, and when a spiral electrode body is formed. The resistance to the generated pressing force and the like is improved, and thereby, the incidence of defective batteries due to the active material powder breaking the separator can be reduced.
【０００９】また、セパレータの材質であるポリエチレ
ンは、比較的融点が低いため、電池を外部短絡させたよ
うな場合には、溶融してセパレータの細孔を塞ぎ、イオ
ンの移動を阻止し、電池が異常に過熱されることを防止
することができる。In addition, since polyethylene, which is a material of the separator, has a relatively low melting point, when the battery is short-circuited externally, it melts and closes the pores of the separator, thereby preventing the movement of ions. Can be prevented from being abnormally overheated.
【００１０】[0010]
【実施例】本発明にかかる渦巻電極体を備えた非水電解
液電池を図１に示し、この図面を用いて本発明の実施例
を以下に説明する。FIG. 1 shows a nonaqueous electrolyte battery provided with a spiral electrode body according to the present invention, and an embodiment of the present invention will be described below with reference to this drawing.
【００１１】セパレータ１として表１に示す４種類のも
のを用い、これらのセパレータ１を夫々２枚用いて袋状
とし、この中にリチウム−アルミニウム合金負極２を挿
入した。[0011] Four types of separators shown in Table 1 were used as the separators 1, and two of these separators 1 were used to form a bag, into which the lithium-aluminum alloy negative electrode 2 was inserted.
【００１２】[0012]
【表１】 [Table 1]
【００１３】正極３は、二酸化マンガンと導電材と結着
剤とを混合してなるペーストをステンレス製のラス板に
塗布し、乾燥して作製したものを用いた。The positive electrode 3 was prepared by applying a paste obtained by mixing manganese dioxide, a conductive material and a binder onto a stainless lath plate and drying the paste.
【００１４】上記セパレータ１内に挿入した負極２と、
正極３を巻き取り渦巻電極体を構成し、この渦巻電極体
をステンレス製の正極缶４に挿入した後、エチレンカー
ボネート、ブチレンカーボネート及びジメトキシエタン
の混合溶媒にトリフルオロメタンスルホン酸リチウム
（ＬｉＣＦ3ＳＯ3）を溶解した電解液を注液し、正極缶
４の開口部を封口蓋５で封口して、外径１５mm、高さ４
０mmの円筒形非水電解液電池を作製した。尚、図中、６
は絶縁パッキング、７及び８は絶縁板、９は正極リー
ド、１０は負極リードである。A negative electrode 2 inserted into the separator 1;
After winding the positive electrode 3 to form a spiral electrode body and inserting this spiral electrode body into a stainless steel positive electrode can 4, lithium trifluoromethanesulfonate (LiCF 3 SO 3) is added to a mixed solvent of ethylene carbonate, butylene carbonate and dimethoxyethane. ) Was dissolved therein, and the opening of the positive electrode can 4 was sealed with a sealing lid 5 to obtain an outer diameter of 15 mm and a height of 4 mm.
A 0 mm cylindrical non-aqueous electrolyte battery was fabricated. In the figure, 6
Is an insulating packing, 7 and 8 are insulating plates, 9 is a positive electrode lead, and 10 is a negative electrode lead.
【００１５】こうして作製した電池のうち、表１におけ
る実施例１のセパレータを用いた電池を本発明電池Ａ、
同様に、実施例２のセパレータを用いた電池を本発明電
池Ｂ、比較例１のセパレータを用いた電池を比較電池
Ｃ、比較例２のセパレータを用いた電池を比較電池Ｄと
する。Among the batteries thus manufactured, the battery using the separator of Example 1 in Table 1 was designated as Battery A of the present invention.
Similarly, the battery using the separator of Example 2 is referred to as Battery B of the present invention, the battery using the separator of Comparative Example 1 is referred to as Comparative Battery C, and the battery using the separator of Comparative Example 2 is referred to as Comparative Battery D.
【００１６】次いで、上記電池Ａ乃至Ｄを夫々２０００
個用意し、これらの電池の電圧不良率を測定し、また、
夫々３個用意してパルス放電した際のパルス放電回数を
測定した。Next, each of the batteries A to D was 2,000
Prepare these, measure the voltage failure rate of these batteries,
The number of pulse discharges when three pulse discharges were prepared was measured.
【００１７】尚、放電回数の測定は、１Ａの電流で３秒
間放電した後、７秒間放電を休止するパルス放電を繰り
返し行い、電池電圧が２．０Ｖに達するまでのパルス放
電の回数を測定するものであり、比較電池Ｃのパルス放
電回数を１００として表している。The number of discharges is measured by repeating a pulse discharge in which the battery is discharged at a current of 1 A for 3 seconds and then stopped for 7 seconds, and the number of pulse discharges until the battery voltage reaches 2.0 V is measured. And the number of pulse discharges of the comparative battery C is represented as 100.
【００１８】[0018]
【表２】 [Table 2]
【００１９】表２より、本発明電池Ａ及びＢは、同一膜
厚の比較電池Ａに比べて、電圧不良率が低下しており、
ポリエチレンの分子量が増加することによって、セパレ
ータの圧接強度が向上していることが認められる。From Table 2, it can be seen that Batteries A and B of the present invention have lower voltage failure rates than Comparative Battery A having the same film thickness.
It is recognized that the press-fitting strength of the separator is improved by increasing the molecular weight of polyethylene.
【００２０】また、比較電池Ｃに使用したセパレータと
同じ分子量のポリエチレン原料を用いたセパレータを用
い、本発明電池と同等の電圧不良率にしようとした場合
には、セパレータの膜厚を５０μm以上とする必要があ
るが、この場合には、比較電池Ｄに見られるように、電
池内に充填できる活物質量が減少して放電容量が低下
し、電池の寿命が短くなる。When a separator using a polyethylene raw material having the same molecular weight as that of the separator used for the comparative battery C is used and a voltage failure rate equivalent to that of the battery of the present invention is attempted, the thickness of the separator is set to 50 μm or more. In this case, as shown in Comparative Battery D, the amount of active material that can be charged into the battery is reduced, the discharge capacity is reduced, and the life of the battery is shortened.
【００２１】[0021]
【発明の効果】本発明の非水電解液電池は、セパレータ
として材質がポリエチレンからなり、且つ、ポリエチレ
ン原料の数平均分子量が３５万以上のものを用いること
により、電池の寿命を低下させることなく、電圧不良率
が低下した電池を製造することが可能となり、生産性を
向上させることができる。According to the non-aqueous electrolyte battery of the present invention, the separator is made of polyethylene and the number average molecular weight of the polyethylene raw material is 350,000 or more. In addition, it is possible to manufacture a battery with a reduced voltage defect rate, and it is possible to improve productivity.
【図１】本発明電池の断面図である。FIG. 1 is a sectional view of a battery of the present invention.
１ セパレータ ２ 負極 ３ 正極 ４ 正極缶 ５ 封口蓋 DESCRIPTION OF SYMBOLS 1 Separator 2 Negative electrode 3 Positive electrode 4 Positive electrode can 5 Sealing lid
フロントページの続き (56)参考文献 特開 平２−94356（ＪＰ，Ａ) 特開 平３−219552（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) H01M 2/14 - 2/18 H01M 10/40 Continuation of the front page (56) References JP-A-2-94356 (JP, A) JP-A-3-219552 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) H01M 2 / 14-2/18 H01M 10/40
Claims (1)
をド−プした材料を用いた負極と、正極と、正負極間に
介挿されるセパレータとを渦巻状に巻回してなる電極体
及び非水電解液を備え、前記セパレータは、材質がポリ
エチレンであり、且つ、ポリエチレン原料の数平均分子
量が３５万以上であることを特徴とする非水電解液電
池。An electrode formed by spirally winding a negative electrode using a light metal , a light metal alloy or a material doped with active material ions, a positive electrode, and a separator interposed between the positive and negative electrodes, and a non-aqueous material. A non-aqueous electrolyte battery comprising an electrolyte, wherein the separator is made of polyethylene and the polyethylene material has a number average molecular weight of 350,000 or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03220347A JP3108142B2 (en) | 1991-08-30 | 1991-08-30 | Non-aqueous electrolyte battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03220347A JP3108142B2 (en) | 1991-08-30 | 1991-08-30 | Non-aqueous electrolyte battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0562663A JPH0562663A (en) | 1993-03-12 |
| JP3108142B2 true JP3108142B2 (en) | 2000-11-13 |
Family
ID=16749716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03220347A Expired - Fee Related JP3108142B2 (en) | 1991-08-30 | 1991-08-30 | Non-aqueous electrolyte battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3108142B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7308641B2 (en) * | 2019-03-29 | 2023-07-14 | マクセル株式会社 | Non-aqueous electrolyte battery |
-
1991
- 1991-08-30 JP JP03220347A patent/JP3108142B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0562663A (en) | 1993-03-12 |
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