JPH11288739A - Manufacture for lithium ion secondary battery - Google Patents
Manufacture for lithium ion secondary batteryInfo
- Publication number
- JPH11288739A JPH11288739A JP10087308A JP8730898A JPH11288739A JP H11288739 A JPH11288739 A JP H11288739A JP 10087308 A JP10087308 A JP 10087308A JP 8730898 A JP8730898 A JP 8730898A JP H11288739 A JPH11288739 A JP H11288739A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- container
- electrodes
- current collector
- electrode active
- 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
-
- 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
Landscapes
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はリチウムイオン２次
電池の製造方法、特にサイクル特性に優れたリチウムイ
オン２次電池の製造方法に関する。The present invention relates to a method for manufacturing a lithium ion secondary battery, and more particularly to a method for manufacturing a lithium ion secondary battery having excellent cycle characteristics.
【０００２】[0002]
【従来の技術】従来、リチウム２次電池用電極を集電体
上に形成する際、電極活物質と結着剤を混合した電極材
に集電体を配し、これにプレスを施すことにより電極活
物質の密度を上げ、電流密度を上げる技術がある。2. Description of the Related Art Conventionally, when an electrode for a lithium secondary battery is formed on a current collector, the current collector is arranged on an electrode material in which an electrode active material and a binder are mixed, and this is pressed. There is a technique for increasing the density of the electrode active material and increasing the current density.
【０００３】例えば、特開昭６２−２２６５６３号公報
には、リチウムと合金化可能な金属の粉末に黒鉛粉末及
び熱可塑性樹脂を混合した負極材を、ステンレスネット
からなる負極集電体をその内底面にスポット溶接して固
着した負極缶に盛込み、１５０℃，１ton／cm2の条件で
ホットプレスする技術が記載されている。For example, Japanese Patent Application Laid-Open No. 62-226563 discloses a negative electrode material in which graphite powder and a thermoplastic resin are mixed with a powder of a metal that can be alloyed with lithium, and a negative electrode current collector made of a stainless steel net. A technique is described in which a negative electrode can is spot-welded to the bottom surface and is hot-pressed under the conditions of 150 ° C. and 1 ton / cm 2 .
【０００４】このように電極材にホットプレスを施すこ
とにより、電極材中の結着剤を溶融させることができ、
電極活物質間及び電極活物質と集電体との結着力を増加
させることができる。しかし、このようにホットプレス
を施した電極をセパレータを介して容器内に配した場
合、容器に電解液を注入しても電極はほとんど膨潤しな
い為、電極及びセパレータと容器との密着力が高められ
ることにより生じる容器からの電極及びセパレータへの
圧縮応力は働かない。よって、電極とセパレータとの密
着性が悪く、正負極間の厚さがセパレータ厚と一致せず
不均一になる。この正負極間の厚さの不均一により、電
池の容量が安定せずサイクル特性が十分でないという問
題があった。[0004] By subjecting the electrode material to hot pressing, the binder in the electrode material can be melted.
The binding force between the electrode active materials and between the electrode active material and the current collector can be increased. However, when the hot-pressed electrode is disposed in the container via the separator, the electrode hardly swells even when the electrolytic solution is injected into the container, so that the adhesion between the electrode and the separator and the container is increased. The resulting compressive stress from the container to the electrodes and separator does not work. Therefore, the adhesion between the electrode and the separator is poor, and the thickness between the positive and negative electrodes does not match the thickness of the separator and becomes non-uniform. Due to the uneven thickness between the positive and negative electrodes, there was a problem that the capacity of the battery was not stable and the cycle characteristics were not sufficient.
【０００５】また、ホットプレスではなくコールドプレ
スを施した場合は、プレスにより電極材中に歪み応力が
残留し（ホットプレスでは加工中の熱により与えられた
歪み応力が除去される。）、電解液を注入した際、電極
が膨潤することにより容器と電極及びセパレータとの密
着力が高められ、容器から電極及びセパレータへ圧縮応
力が働き、正負極間の厚さが均一になる。しかし、電極
材にコールドプレスを施しただけでは電極材中の結着剤
を溶融させることができない為、電極活物質間及び電極
活物質と集電体との結着力は小さい。この為、充放電に
よる電極活物質の膨張収縮に伴い、繰り返し使ううちに
電極活物質間及び電極活物質と集電体との間で剥離が生
じ界面抵抗が増大してしまい、ホットプレスと同様にサ
イクル特性が十分でないという問題があった。When cold pressing is performed instead of hot pressing, strain stress remains in the electrode material due to pressing (in hot pressing, strain stress given by heat during processing is removed), and electrolysis is performed. When the liquid is injected, the electrode swells to increase the adhesion between the container, the electrode, and the separator, and compressive stress acts on the electrode and the separator from the container, so that the thickness between the positive electrode and the negative electrode becomes uniform. However, since the binder in the electrode material cannot be melted only by performing cold pressing on the electrode material, the binding force between the electrode active materials and between the electrode active material and the current collector is small. For this reason, along with the expansion and contraction of the electrode active material due to charge and discharge, separation between the electrode active materials and between the electrode active material and the current collector occurs during repeated use, and the interface resistance increases. However, there is a problem that the cycle characteristics are not sufficient.
【０００６】[0006]
【発明が解決しようとする課題】リチウムイオン２次電
池のサイクル特性を向上させることを課題とする。An object of the present invention is to improve the cycle characteristics of a lithium ion secondary battery.
【０００７】[0007]
【課題を解決するための手段】上記課題を解決する請求
項１に記載のリチウムイオン２次電池の製造方法の特徴
は、電極活物質と結着剤とを含む電極材を集電体に配す
る行程と、該電極材が配された集電体を前記結着剤が溶
融する温度でホットプレスし電極を製造する行程と、該
電極にコールドプレスを施し該電極に歪み応力を与える
行程と、該歪み応力が与えられた電極を含む正極及び負
極をセパレータと共に容器内に配する行程と、該容器内
に電解液を注入することにより前記電極を膨潤させ前記
容器との間で圧縮応力を発生させる行程と、を有するこ
とである。According to a first aspect of the present invention, there is provided a method of manufacturing a lithium ion secondary battery, comprising disposing an electrode material containing an electrode active material and a binder on a current collector. A process of hot-pressing the current collector on which the electrode material is disposed at a temperature at which the binder melts to produce an electrode, and a process of performing a cold press on the electrode to apply a strain stress to the electrode. Arranging a positive electrode and a negative electrode including the electrode subjected to the strain stress in a container together with a separator, and swelling the electrode by injecting an electrolytic solution into the container to reduce a compressive stress between the container and the container. And the step of generating.
【０００８】また請求項２に記載のリチウムイオン２次
電池の製造方法の特徴は、電極活物質と結着剤とを含む
電極材を集電体に配する行程と、該電極材が配された集
電体をコールドプレスする行程と、該電極材を前記結着
剤が溶融する温度で加熱し電極を製造する行程と、該電
極にコールドプレスを施し該電極に歪み応力を与える行
程と、該歪み応力が与えられた電極を含む正極及び負極
をセパレータと共に容器内に配する行程と、該容器内に
電解液を注入することにより前記電極を膨潤させ前記容
器との間で圧縮応力を発生させる行程と、を有すること
である。[0008] A feature of the method of manufacturing a lithium ion secondary battery according to the second aspect is that a step of disposing an electrode material containing an electrode active material and a binder on a current collector and the step of disposing the electrode material are performed. Cold pressing the current collector, heating the electrode material at a temperature at which the binder melts to produce an electrode, cold pressing the electrode to apply strain stress to the electrode, Disposing the positive electrode and the negative electrode including the electrode to which the strain stress is applied together with the separator in a container, and injecting an electrolytic solution into the container to swell the electrode and generate a compressive stress between the container and the container. And the process of causing
【０００９】[0009]
【発明の実施の形態】以下、本件の実施の形態（以下実
施形態という）について説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention (hereinafter referred to as an embodiment) will be described below.
【００１０】実施形態１．本発明のリチウムイオン２次
電池の製造方法では、電極活物質と結着剤とを含む電極
材を集電体に配したものにホットプレスを行った後に結
着剤が溶融する温度で加熱することにより、電極活物質
間及び電極活物質と集電体との十分な結着力を得ること
ができる。また、その後こうして得られた電極にコール
ドプレスを施すことにより、電極に歪み応力を残留さ
せ、この電極を容器内に挿入した後、電解液を注入する
ことにより電極が膨潤し、容器との密着力が向上する。
電極と容器との密着力が向上することにより、容器から
電極へ圧縮応力が生じ、電極間厚さを均一に保つことが
できるようになる。Embodiment 1 In the method for manufacturing a lithium ion secondary battery according to the present invention, the electrode material including the electrode active material and the binder is disposed on the current collector, and then hot pressed at a temperature at which the binder is melted. Thereby, a sufficient binding force between the electrode active materials and between the electrode active materials and the current collector can be obtained. In addition, the electrode thus obtained is subjected to a cold press to leave strain stress on the electrode. After the electrode is inserted into the container, the electrode is swelled by injecting the electrolyte, and the electrode adheres to the container. Power improves.
By improving the adhesion between the electrode and the container, a compressive stress is generated from the container to the electrode, and the thickness between the electrodes can be kept uniform.
【００１１】即ち、本発明により電極活物質間及び電極
活物質と集電体との十分な結着力の確保と、電極間厚さ
の均一化が両立でき、サイクル特性を向上させることが
できる。That is, according to the present invention, a sufficient binding force between the electrode active materials and between the electrode active material and the current collector can be ensured, and the thickness between the electrodes can be made uniform, so that the cycle characteristics can be improved.
【００１２】ここで、ホットプレス又はコールドプレス
後加熱し、その後コールドプレスを施す処理は正極及び
負極のいずれか一方以上に行えば効果を有し、両方に行
えば一方に行ったものよりもなおいっそうの効果を有す
る。Here, the process of heating after hot pressing or cold pressing and then performing cold pressing has an effect when performed on at least one of the positive electrode and the negative electrode, and when performed on both, it is more effective than that performed on one of them. Has even more effect.
【００１３】また、上記ホットプレスまたはコールドプ
レス後に加熱を施す工程は、電極活物質間及び電極活物
質と集電体との密着力を向上させる為、結着剤の融点以
上の温度となるようにし、電極の充填率が３０〜６０体
積％（空孔率が４０〜７０体積％）となるように条件を
設定するのが望ましい。Further, the step of heating after the hot press or the cold press is performed so that the temperature is higher than the melting point of the binder in order to improve the adhesion between the electrode active materials and between the electrode active material and the current collector. It is desirable to set conditions so that the electrode filling rate is 30 to 60% by volume (porosity is 40 to 70% by volume).
【００１４】更に、その後のコールドプレス工程は、電
解液注入後に電極が膨潤するよう電極の充填率が４０〜
７０体積％となるようにプレスするのが望ましい。Further, in the subsequent cold pressing step, the filling rate of the electrode is set to 40 to 50 so that the electrode swells after the electrolyte is injected.
It is desirable to press to 70% by volume.
【００１５】実施形態２．実施形態１でホットプレスを
行う代わりに、コールドプレスを行い、その後結着剤が
溶融する温度で加熱して電極を製造することもできる。
この場合はコールドプレスで電極材中に歪み応力が残留
するが、加熱によりこの歪み応力が除去される為、実施
形態１と同様にこの後の処理で電極に歪み応力を付与す
る為のコールドプレスが必要である。実施形態２も１と
同様の理由で、サイクル特性を向上させることができ
る。Embodiment 2 Instead of performing hot pressing in the first embodiment, cold pressing may be performed, and then heating may be performed at a temperature at which the binder melts to manufacture an electrode.
In this case, the strain stress remains in the electrode material by the cold press. However, since the strain stress is removed by heating, the cold press for applying the strain stress to the electrode in the subsequent processing is performed similarly to the first embodiment. is necessary. In the second embodiment, the cycle characteristics can be improved for the same reason as in the first embodiment.
【００１６】以下に、上記実施形態の具体例を実施例と
して説明する。Hereinafter, a specific example of the above embodiment will be described as an example.
【実施例】（実施例１）図１に本件発明に係る実施例１
のリチウムイオン２次電池製造過程のフローチャートを
示す。図１において、ステップ１００では、集電箔上に
電極活性物質と結着剤と溶剤からなるペーストを塗布す
る。(Embodiment 1) FIG. 1 shows Embodiment 1 according to the present invention.
3 is a flowchart of a lithium ion secondary battery manufacturing process. In FIG. 1, in step 100, a paste made of an electrode active material, a binder and a solvent is applied on a current collector foil.
【００１７】正極の場合、８５ｗｔ％のＬｉＭｎ２Ｏ４
を電極活性物質とし、１０ｗｔ％のカーボンブラックを
導電化材として、結着剤ＰＶＤＦを５ｗｔ％溶かしたＮ
−メチルピロリドン（ＮＭＰ）溶液中に混合，混練して
ペースト状とした。このペーストをアルミニウム集電箔
上に塗布した。In the case of the positive electrode, 85 wt% of LiMn 2 O 4
Is used as an electrode active material, 10 wt% of carbon black is used as a conductive material, and 5 wt% of a binder PVDF is dissolved in N.
-Methylpyrrolidone (NMP) solution was mixed and kneaded to form a paste. This paste was applied on an aluminum current collector foil.
【００１８】負極の場合、９０ｗｔ％の天然黒鉛を電極
活性物質とし、結着剤ＰＶＤＦを１０ｗｔ％溶かしたＮ
−メチルピロリドン（ＮＭＰ）溶液中に混合，混練して
ペースト状とした。このペーストを銅集電箔上に塗布し
た。In the case of the negative electrode, 90% by weight of natural graphite is used as an electrode active material, and Nb in which 10% by weight of a binder PVDF is dissolved is used.
-Methylpyrrolidone (NMP) solution was mixed and kneaded to form a paste. This paste was applied on a copper current collector foil.
【００１９】ステップ１０１では、上記ペーストを集電
箔上で乾燥した。In step 101, the paste was dried on a current collector foil.
【００２０】ステップ１０２は、ホットプレス工程を表
す。正極は０．５ton／cm2、負極は０．１ton／cm2の圧
力をかけ、両者ともＰＶＤＦが溶融する１７５℃でホッ
トプレスを行った。この工程で結着剤は溶融し、電極活
物質間及び電極活物質と集電箔との結着力が向上すると
ともに、電極内部の応力は緩和される。Step 102 represents a hot pressing process. Positive electrode 0.5 ton / cm 2, the negative electrode applying a pressure of 0.1ton / cm 2, PVDF both were subjected to hot pressing at 175 ° C. to melt. In this step, the binder is melted, the binding force between the electrode active materials and between the electrode active material and the current collector foil is improved, and the stress inside the electrodes is reduced.
【００２１】ステップ１０３は、コールドプレス工程を
表す。正極は１ton／cm2、負極は０．２ton／cm2の圧力
をかけ、常温でコールドプレスを行った。この工程での
コールドプレスの加圧力は、後の工程で電解液を注入し
電極を膨張させることにより容器との間で発生させたい
応力量とする。Step 103 represents a cold press process. The positive electrode 1 ton / cm 2, the negative electrode applying a pressure of 0.2ton / cm 2, was cold pressed at room temperature. The pressing force of the cold press in this step is set to the amount of stress to be generated between the cold press and the container by injecting the electrolyte and expanding the electrode in the subsequent step.
【００２２】ステップ１０４では、こうして出来上がっ
た正極及び負極をセパレータを介して対向させ捲回する
ことにより捲回式電極を得た。In step 104, the thus-prepared positive electrode and negative electrode were opposed to each other with a separator interposed therebetween and wound to obtain a wound electrode.
【００２３】ステップ１０５では、上記捲回式電極を円
筒型容器に挿入した。In step 105, the wound electrode was inserted into a cylindrical container.
【００２４】ステップ１０６では、容器内にエチレンカ
ーボネート（ＥＣ）とジエチレンカーボネート（ＤＥ
Ｃ）を体積比１：１で混合した溶媒に１mol／lのＬｉＢ
Ｆ４を溶解させた電解液を注入した。電解液を注入する
ことによって、電極が膨張し電極と容器とが密着するこ
とにより電極間に圧縮応力が発生した。In step 106, ethylene carbonate (EC) and diethylene carbonate (DE)
C) in a solvent mixed at a volume ratio of 1: 1 with 1 mol / l LiB
An electrolyte in which F4 was dissolved was injected. The injection of the electrolytic solution caused the electrodes to expand, causing the electrodes and the container to come into close contact with each other, thereby generating a compressive stress between the electrodes.
【００２５】（実施例２）図２に本件発明に係る実施例
２の製造過程のフローチャートを示す。(Embodiment 2) FIG. 2 shows a flowchart of a manufacturing process of Embodiment 2 according to the present invention.
【００２６】実施例２では実施例１のステップ１０２の
ホットプレス代わりにステップ２０２として第１のコー
ルドプレスを行い、ステップ２０３として電極の加熱工
程が加わったのみで、他は実施例１と同様の条件で製造
した。In the second embodiment, the first cold pressing is performed as a step 202 instead of the hot pressing in the step 102 of the first embodiment, and only a step of heating an electrode is added as a step 203. Manufactured under conditions.
【００２７】ステップ２０２では、正極は１ton／cm2、
負極は０．２ton／cm2の圧力をかけ、常温でコールドプ
レスを行った。また、ステップ２０３では、正極及び負
極をＰＶＤＦが溶融する１７５℃で加熱した。 （比較例１）比較例１では、電極にホットプレスのみを
施した例を示す。比較例１では、実施例１のステップ１
０３のコールドプレスを行わなかった他は実施例１と同
様の条件で製造した。In step 202, the positive electrode is 1 ton / cm 2 ,
The negative electrode was subjected to a cold press at room temperature by applying a pressure of 0.2 ton / cm 2 . In Step 203, the positive electrode and the negative electrode were heated at 175 ° C. at which PVDF melted. (Comparative Example 1) Comparative Example 1 shows an example in which only hot pressing was performed on the electrode. In Comparative Example 1, Step 1 of Example 1 was performed.
03 was manufactured under the same conditions as in Example 1 except that cold pressing was not performed.
【００２８】（比較例２）比較例２では、電極にコール
ドプレスのみを施した例を示す。比較例２では、実施例
２のステップ２０３の加熱工程及びステップ２０４の第
２のコールドプレスを行わなかった他は実施例２と同様
の条件で製造した。(Comparative Example 2) In Comparative Example 2, an example in which only a cold press is applied to an electrode is shown. Comparative Example 2 was manufactured under the same conditions as in Example 2 except that the heating step in Step 203 of Example 2 and the second cold pressing in Step 204 were not performed.
【００２９】（評価）これら作製されたリチウムイオン
２次電池のサイクル特性を評価した。(Evaluation) The cycle characteristics of the manufactured lithium ion secondary batteries were evaluated.
【００３０】表１には、サイクル特性の評価結果が示さ
せる。サイクル特性は、（１／３）Ｃ、すなわち３時間
で満充電できる定電流を充放電させる工程を１サイクル
とし、初期容量に対する２００サイクル後の容量で評価
した。Table 1 shows the evaluation results of the cycle characteristics. The cycle characteristics were evaluated by (1/3) C, that is, the step of charging and discharging a constant current capable of being fully charged in 3 hours was defined as one cycle, and the capacity was 200 cycles after the initial capacity.
【００３１】[0031]
【表１】 [Table 1]
【００３２】表１から分かるように、本実施例はいずれ
の比較例に比べてもサイクル特性が大きく向上している
ことが分かる。As can be seen from Table 1, it can be seen that the present embodiment has significantly improved cycle characteristics as compared with any of the comparative examples.
【００３３】比較例１でサイクル特性が低いのは、正負
極間の厚さが不均一である為、充放電容量が安定しない
ことによると考えられる。また、比較例２でサイクル特
性が低いのは、電極活物質間及び電極活物質と集電箔と
の結着力が小さく、繰り返し使ううちに電極活物質間及
び電極活物質と集電箔との間で剥離が生じ界面抵抗が増
大してしまうことによると考えられる。It is considered that the reason why the cycle characteristics are low in Comparative Example 1 is that the charge / discharge capacity is not stable because the thickness between the positive and negative electrodes is not uniform. Further, the cycle characteristics in Comparative Example 2 were low because the binding force between the electrode active materials and between the electrode active material and the current collector foil was small, and between the electrode active materials and between the electrode active material and the current collector foil during repeated use. It is considered that peeling occurs between the layers and the interface resistance increases.
【００３４】これに対して、実施例１及び２のサイクル
特性が高いのは、正負極間の厚さの均一化と電極活物質
間及び電極活物質と集電箔との結着力向上が両立してい
る為だと考えられる。On the other hand, the high cycle characteristics of Examples 1 and 2 are because the uniformity of the thickness between the positive and negative electrodes and the improvement of the binding force between the electrode active materials and between the electrode active material and the current collector foil are both compatible. It is thought that it is because.
【００３５】[0035]
【発明の効果】即ち、本発明のリチウムイオン2次電池
の製造方法では、電極活物質間及び電極活物質と集電体
との十分な結着力が得られるとともに、容器から電極へ
圧縮応力を生じさせ、正負極間の厚さを均一化すること
ができ、サイクル特性を向上させることができる。That is, in the method for manufacturing a lithium ion secondary battery of the present invention, a sufficient binding force between the electrode active materials and between the electrode active material and the current collector can be obtained, and a compressive stress is applied from the container to the electrodes. As a result, the thickness between the positive and negative electrodes can be made uniform, and the cycle characteristics can be improved.
【図１】本発明実施例１の製造過程のフローチャートを
示す図である。FIG. 1 is a view showing a flowchart of a manufacturing process according to a first embodiment of the present invention.
【図２】本発明実施例２の製造過程のフローチャートを
示す図である。FIG. 2 is a view illustrating a flowchart of a manufacturing process according to a second embodiment of the present invention.
Claims (2)
電体に配する行程と、該電極材が配された集電体を前記
結着剤が溶融する温度でホットプレスし電極を製造する
行程と、該電極にコールドプレスを施し該電極に歪み応
力を与える行程と、該歪み応力が与えられた電極を含む
正極及び負極をセパレータと共に容器内に配する行程
と、該容器内に電解液を注入することにより前記電極を
膨潤させ前記容器との間で圧縮応力を発生させる行程
と、を有するリチウムイオン２次電池の製造方法。1. A process of disposing an electrode material containing an electrode active material and a binder on a current collector, and hot-pressing the current collector on which the electrode material is disposed at a temperature at which the binder melts. A step of producing an electrode, a step of applying a strain to the electrode by cold pressing the electrode, a step of disposing a positive electrode and a negative electrode including the electrode to which the strain is applied in a container together with a separator, A step of injecting an electrolytic solution into the inside to swell the electrodes and generate a compressive stress between the electrodes and the container.
電体に配する行程と、該電極材が配された集電体をコー
ルドプレスする行程と、該電極材を前記結着剤が溶融す
る温度で加熱し電極を製造する行程と、該電極にコール
ドプレスを施し該電極に歪み応力を与える行程と、該歪
み応力が与えられた電極を含む正極及び負極をセパレー
タと共に容器内に配する行程と、該容器内に電解液を注
入することにより前記電極を膨潤させ前記容器との間で
圧縮応力を発生させる行程と、を有するリチウムイオン
２次電池の製造方法。2. A step of disposing an electrode material containing an electrode active material and a binder on a current collector; a step of cold pressing the current collector on which the electrode material is disposed; A step of manufacturing the electrode by heating at a temperature at which the adhesive is melted, a step of performing a cold press on the electrode to apply a strain stress to the electrode, and a container including a positive electrode and a negative electrode including the electrode provided with the strain stress together with a separator. And a step of injecting an electrolytic solution into the container to swell the electrodes and generate a compressive stress with the container.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08730898A JP3956478B2 (en) | 1998-03-31 | 1998-03-31 | Method for manufacturing lithium ion secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08730898A JP3956478B2 (en) | 1998-03-31 | 1998-03-31 | Method for manufacturing lithium ion secondary battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11288739A true JPH11288739A (en) | 1999-10-19 |
| JP3956478B2 JP3956478B2 (en) | 2007-08-08 |
Family
ID=13911215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP08730898A Expired - Fee Related JP3956478B2 (en) | 1998-03-31 | 1998-03-31 | Method for manufacturing lithium ion secondary battery |
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| Country | Link |
|---|---|
| JP (1) | JP3956478B2 (en) |
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| JP2005276516A (en) * | 2004-03-23 | 2005-10-06 | Nec Tokin Corp | Secondary battery and its manufacturing method |
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| JP2001216957A (en) * | 2000-02-04 | 2001-08-10 | Matsushita Electric Ind Co Ltd | Method for manufacturing electrode for secondary battery of nonaqueous electrolyte |
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| JP2005276516A (en) * | 2004-03-23 | 2005-10-06 | Nec Tokin Corp | Secondary battery and its manufacturing method |
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