JPH0415985B2 - - Google Patents
Info
- Publication number
- JPH0415985B2 JPH0415985B2 JP58104167A JP10416783A JPH0415985B2 JP H0415985 B2 JPH0415985 B2 JP H0415985B2 JP 58104167 A JP58104167 A JP 58104167A JP 10416783 A JP10416783 A JP 10416783A JP H0415985 B2 JPH0415985 B2 JP H0415985B2
- Authority
- JP
- Japan
- Prior art keywords
- positive electrode
- weight
- parts
- aqueous electrolyte
- sheet
- 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 - Lifetime
Links
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 claims description 26
- 239000011255 nonaqueous electrolyte Substances 0.000 claims description 19
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 12
- 229910002804 graphite Inorganic materials 0.000 claims description 12
- 239000010439 graphite Substances 0.000 claims description 12
- 239000006229 carbon black Substances 0.000 claims description 11
- 239000000758 substrate Substances 0.000 claims description 7
- 239000011230 binding agent Substances 0.000 claims description 4
- 230000014759 maintenance of location Effects 0.000 description 8
- 239000004020 conductor Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 239000003792 electrolyte Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000007774 positive electrode material Substances 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000000080 wetting agent Substances 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/06—Electrodes for primary cells
Description
【発明の詳細な説明】
この発明は、非水電解液用正極、特にスパイラ
ル状の電極体を構成するものに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a positive electrode for a non-aqueous electrolyte, particularly to one constituting a spiral electrode body.
一般に、非水電解液電池は、リチウム、ナトリ
ウム、アルミニウム等の軽金属からなる負極と、
非水電解液が含浸されるセパレータと、正極とに
よつて構成される。ところで、この種の非水電解
液電池は、慨してその内部抵抗が大きく、このた
めその正極と負極との対向面積はできるだけ大き
く確保する必要がある。そこで、筒型の非水電解
液電池では、正極および負極をそれぞれシート状
に形成する。そして、そのシート状正極体をセパ
レータおよび負極とともに渦巻状に巻回して電極
体を構成する。 Generally, nonaqueous electrolyte batteries include a negative electrode made of a light metal such as lithium, sodium, or aluminum;
It is composed of a separator impregnated with a non-aqueous electrolyte and a positive electrode. By the way, this type of non-aqueous electrolyte battery generally has a large internal resistance, and therefore it is necessary to ensure that the opposing area between the positive electrode and the negative electrode is as large as possible. Therefore, in a cylindrical non-aqueous electrolyte battery, the positive electrode and the negative electrode are each formed into sheet shapes. Then, the sheet-like positive electrode body is spirally wound together with a separator and a negative electrode to form an electrode body.
この発明は、このような渦巻状電極体を構成す
るためのシート状正極体、特に正極活物質として
二酸化マンガンを用いるものに関する。 The present invention relates to a sheet-like positive electrode body for constructing such a spiral electrode body, particularly one using manganese dioxide as a positive electrode active material.
ところで、正極活物質として二酸化マンガンを
用いる場合、適当な導電材を混入して導電性を増
せなければ、この種の非水電解液電池用正極とし
て使用することができない。そこで、従来におい
ては、その導電材としてグラフアイトあるいはカ
ーボンブラツク等が使用されていた。具体的に
は、二酸化マンガンとグラフアイトあるいは二酸
化マンガンとカーボンブラツクの混合物を結着剤
とともに混練し、これを例えばパンチドメタル等
の多孔性導電基体にシート状に支持させたものが
使用されていた。しかしながら、必要な導電性を
得るためには、多量のグラフアイトを混入しなけ
ればならず、このため正極活物質である二酸化マ
ンガンの含有率が小さくなつて、放電容量が低化
するという問題を生じていた。また、導電材とし
てグラフアイトを使用した場合、非水電解液の保
持性が悪くなり、このため正極体内部でのイオン
の移動が円滑に行なわれず、これにより重負荷放
電における正極活物質の利用率低下が大きいとい
つたような問題もあつた。 By the way, when manganese dioxide is used as a positive electrode active material, it cannot be used as a positive electrode for this type of nonaqueous electrolyte battery unless a suitable conductive material is mixed in to increase the conductivity. Conventionally, therefore, graphite, carbon black, or the like has been used as the conductive material. Specifically, a mixture of manganese dioxide and graphite or manganese dioxide and carbon black is kneaded with a binder, and this is supported in the form of a sheet on a porous conductive substrate such as punched metal. Ta. However, in order to obtain the necessary conductivity, it is necessary to mix a large amount of graphite, which reduces the content of manganese dioxide, which is the active material of the positive electrode, and reduces the discharge capacity. It was happening. In addition, when graphite is used as a conductive material, the retention of non-aqueous electrolyte becomes poor, and ions cannot move smoothly inside the positive electrode body. There were also problems where the rate of decline was significant.
他方、導電材としてカーボンブラツクを使用し
た場合は、導電性に付いては上述したグラフアイ
トよりも優れているが、シート状電極体を形成す
る場合の成型性および保形性が悪く、このため、
例えば渦巻状の電極体を構成するのには適してい
なかつた。 On the other hand, when carbon black is used as a conductive material, it has better conductivity than the above-mentioned graphite, but it has poor moldability and shape retention when forming a sheet-like electrode body. ,
For example, it was not suitable for constructing a spiral electrode body.
この発明は、以上のような従来の問題を鑑みて
なされたもので、その目的とするところは、正極
活物質である二酸化マンガンの有効含有率を低下
させることなく、また、その成型性および保形性
を確保して正極体の機械的強度特性を向上させる
ことができる一方、良好な電解液保持性を確保す
ることができ、これにより内部抵抗を減少させて
重負荷放電性能を向上させることができるように
した非水電解液電池用正極を提供することにあ
る。 This invention was made in view of the above-mentioned conventional problems, and its purpose is to improve the moldability and preservation of manganese dioxide without reducing the effective content of manganese dioxide, which is a positive electrode active material. It is possible to improve the mechanical strength characteristics of the positive electrode body by ensuring shapeability, and it is also possible to ensure good electrolyte retention, thereby reducing internal resistance and improving heavy load discharge performance. An object of the present invention is to provide a positive electrode for a non-aqueous electrolyte battery that can perform the following.
上記の目的を達成するために、この発明は、二
酸化マンガン100重量部、グラフアイト７〜12重
量部、カーボンブラツク0.5〜1.5重量部を結着剤
とともに混練したものを、多孔性導電基体に直接
的にシート状に付直して支持させたことを特徴と
する。 In order to achieve the above object, the present invention provides a method for directly applying a mixture of 100 parts by weight of manganese dioxide, 7 to 12 parts by weight of graphite, and 0.5 to 1.5 parts by weight of carbon black together with a binder to a porous conductive substrate. It is characterized by being reattached and supported in the form of a sheet.
以下、この発明の好適な実施例を図面に基づい
て説明する。 Hereinafter, preferred embodiments of the present invention will be described based on the drawings.
第１図および第２図はこの発明による非水電解
液電池用正極の一実施例を示す。 FIGS. 1 and 2 show an embodiment of a positive electrode for a non-aqueous electrolyte battery according to the present invention.
先ず、第１図に示すように、例えばパンチドメ
タル等の多孔性導電基体１４に正極１２が保持さ
れ、シート状正極体１０が構成されている。正極
１２は、二酸化マンガン100重量部に対し、グラ
フアイト７〜12重量部、カーボンブラツク0.5〜
1.5重量部を添加・混合した後、水および結着剤
を加えてスラリー状となす。 First, as shown in FIG. 1, a positive electrode 12 is held on a porous conductive substrate 14, such as punched metal, to form a sheet positive electrode body 10. The positive electrode 12 contains 100 parts by weight of manganese dioxide, 7 to 12 parts by weight of graphite, and 0.5 to 0.5 parts by weight of carbon black.
After adding and mixing 1.5 parts by weight, water and a binder are added to form a slurry.
次に、このスラリー状体を、パンチドメタル等
の多孔性導電基体１４に塗布・乾燥・圧着してシ
ート状とする。そして、所定の寸法に裁断され
る。 Next, this slurry-like material is applied, dried, and pressed onto a porous conductive substrate 14 such as punched metal to form a sheet. Then, it is cut into predetermined dimensions.
次に上述のようにして構成されたシート状正極
体１０は、第２図に示すようにセパレータ１６、
負極１８とともに巻回されて渦巻状の電極体に形
成される。そして、この渦巻状電極体が電池缶内
の非水電解液中に浸漬されることにより、非水電
解液電池を構成する。 Next, the sheet-like positive electrode body 10 constructed as described above has a separator 16,
It is wound together with the negative electrode 18 to form a spiral electrode body. Then, this spiral electrode body is immersed in a non-aqueous electrolyte in a battery can, thereby forming a non-aqueous electrolyte battery.
ここで、上記カーボンブラツクの添加量が0.5
重量部以下になると、正極における電解液保持性
が低下し、これにより内部抵抗が高くなつて重負
荷放電性能が低下する。他方、そのカーボンブラ
ツクの添加量1.5重量部以上になると、成型性お
よび保形性が悪くなつて渦巻状電極体を形成する
のに十分な機械的強度特性を得ることができなく
なつてしまう。また、グラフアイトについては、
その添加量が７重量部以下では十分な導電性を付
与することができなくなり、内部抵抗が高くなつ
たりするなどの電池としての性能低下をもたら
す。他方、そのグラフアイトの添加量が12重量部
以上になると、正極活物質である二酸化マンガン
の含有率が低下し、これにより有効発電容量が少
くなつて、非水電解液電池としての特性が失われ
てしまう。ところが、二酸化マンガン、グラフア
イトおよびカーボンブラツクをそれぞれ上述した
比率で使用した場合、成型性および保形性とも良
好となり、かつシート状あるいは渦巻状に形成し
た場合の機械的強度特性も良好となり、これとと
もに正極における電解液の保持性も向上して内部
抵抗が減少し、重負荷放電性能等を大幅に向上さ
せられることが確認された。 Here, the amount of carbon black added is 0.5
When the amount is less than 1 part by weight, the electrolyte retention property of the positive electrode decreases, thereby increasing internal resistance and deteriorating heavy load discharge performance. On the other hand, if the amount of carbon black added exceeds 1.5 parts by weight, moldability and shape retention deteriorate, making it impossible to obtain sufficient mechanical strength characteristics to form a spiral electrode body. Also, regarding graphite,
If the amount added is less than 7 parts by weight, sufficient conductivity cannot be imparted, resulting in deterioration in battery performance such as increased internal resistance. On the other hand, when the amount of graphite added exceeds 12 parts by weight, the content of manganese dioxide, which is the positive electrode active material, decreases, resulting in a decrease in effective power generation capacity and loss of characteristics as a non-aqueous electrolyte battery. I'll get lost. However, when manganese dioxide, graphite, and carbon black are used in the above-mentioned ratios, both moldability and shape retention are good, and the mechanical strength properties when formed into a sheet or spiral shape are also good. At the same time, it was confirmed that the retention of electrolyte in the positive electrode was improved, the internal resistance was reduced, and heavy load discharge performance etc. were significantly improved.
以下、具体的な実施例を示す。 Specific examples will be shown below.
二酸化マンガン100重量部、グラフアイト９重
量部、カーボンブラツク１重量部の割り合いで混
合する。この混合体に湿潤剤を加えて混練し、
SUS（ステンレススチール）製基体に塗布・乾燥
してシート状に形成する。湿潤剤としては、水55
重量部に対してテフロンデイスパージヨン６重量
部を加えたものを使用する。また、負極とし金属
リチウム、セパレータとしてポリプロピレン不織
布を使用し、上記シート状正極体とともに巻回し
て渦巻状電極体を形成する。そして、負極缶に挿
入し、端子取り付けおよび非水電解液の注入をお
こなつた後、密封して非水電解液電池を構成し
た。 Mix 100 parts by weight of manganese dioxide, 9 parts by weight of graphite, and 1 part by weight of carbon black. A wetting agent is added to this mixture and kneaded.
It is applied to a SUS (stainless steel) substrate and dried to form a sheet. As a wetting agent, water55
6 parts by weight of Teflon dispersion is added to the parts by weight. Further, metallic lithium is used as the negative electrode, and polypropylene nonwoven fabric is used as the separator, and is wound together with the sheet-like positive electrode body to form a spiral electrode body. Then, the battery was inserted into a negative electrode can, terminals were attached, and non-aqueous electrolyte was injected, followed by sealing to form a non-aqueous electrolyte battery.
以上のようにして構成された非水電解液電池
は、従来の同タイプのものに比べて、先ず、不良
品の発生が大幅に少くなつており、また内部抵抗
も低くなつており、良好な重負荷放電性能を得る
ことができる。 The non-aqueous electrolyte battery constructed as described above has significantly fewer defective products than conventional ones of the same type, and has a lower internal resistance, resulting in good performance. Heavy load discharge performance can be obtained.
以上のように、この発明による非水電解液電池
用正極は、電解液保持性の向上と機械的強度特性
の向上という、従来は互いに背反していた要求を
同時に満たすことができ、これにより品質の安定
した電池を構成することができるとともに、内部
抵抗が低く重負荷放電性能に優れた非水電解液電
池を構成することができる。 As described above, the positive electrode for non-aqueous electrolyte batteries according to the present invention can simultaneously satisfy the requirements of improved electrolyte retention and improved mechanical strength properties, which were conventionally contradictory requirements. It is possible to construct a stable battery, and also to construct a non-aqueous electrolyte battery with low internal resistance and excellent heavy load discharge performance.
第１図は、この発明による非水電解液電池用正
極の一実例を示す部分断面図である。第２図は、
上記正極を用いて渦巻状電極体を形成する状態を
示す断面図である。
１０……シート状正極体、１２……正極、１４
……多孔性導電基体、１６……セパレータ、１８
……負極。
FIG. 1 is a partial sectional view showing an example of a positive electrode for a non-aqueous electrolyte battery according to the present invention. Figure 2 shows
FIG. 3 is a cross-sectional view showing a state in which a spiral electrode body is formed using the positive electrode. 10... Sheet-like positive electrode body, 12... Positive electrode, 14
... Porous conductive substrate, 16 ... Separator, 18
...Negative pole.
Claims (1)
〜12重量部、カーボンブラツク0.5〜1.5重量部を
結着剤とともに混練したものを、多孔性導電基体
に直接的にシート状に付着して支持させてなるこ
とを特徴とする非水電解液電池用正極。1 100 parts by weight of manganese dioxide, graphite 7
-12 parts by weight of carbon black and 0.5 to 1.5 parts by weight of carbon black are kneaded together with a binder, which is directly adhered to a porous conductive substrate in the form of a sheet to support the non-aqueous electrolyte battery. For positive electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10416783A JPS59230257A (en) | 1983-06-13 | 1983-06-13 | Positive electrode for nonaqueous electrolyte battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10416783A JPS59230257A (en) | 1983-06-13 | 1983-06-13 | Positive electrode for nonaqueous electrolyte battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59230257A JPS59230257A (en) | 1984-12-24 |
| JPH0415985B2 true JPH0415985B2 (en) | 1992-03-19 |
Family
ID=14373485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10416783A Granted JPS59230257A (en) | 1983-06-13 | 1983-06-13 | Positive electrode for nonaqueous electrolyte battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59230257A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI288495B (en) * | 2003-03-27 | 2007-10-11 | Nec Tokin Corp | Electrode and electrochemical cell therewith |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56126254A (en) * | 1980-03-10 | 1981-10-03 | Sanyo Electric Co Ltd | Positive electrode of organic electrolytic battery |
-
1983
- 1983-06-13 JP JP10416783A patent/JPS59230257A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56126254A (en) * | 1980-03-10 | 1981-10-03 | Sanyo Electric Co Ltd | Positive electrode of organic electrolytic battery |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59230257A (en) | 1984-12-24 |
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