JP2000251880A - Lithium secondary battery and manufacture of its electrode plate - Google Patents
Lithium secondary battery and manufacture of its electrode plateInfo
- Publication number
- JP2000251880A JP2000251880A JP11056504A JP5650499A JP2000251880A JP 2000251880 A JP2000251880 A JP 2000251880A JP 11056504 A JP11056504 A JP 11056504A JP 5650499 A JP5650499 A JP 5650499A JP 2000251880 A JP2000251880 A JP 2000251880A
- Authority
- JP
- Japan
- Prior art keywords
- negative electrode
- electrode plate
- pts
- thickener
- dispersant
- 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】本発明は、リチウム二次電
池、特にその負極板の改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lithium secondary battery, and more particularly, to an improvement of a negative electrode plate thereof.
【０００２】[0002]
【従来の技術】従来、リチウム二次電池の製造に関して
は、集電体とその表面に塗着されるペースト層との密着
性をよくすることが重要となっている。この密着性が悪
いと電池の組立中にペースト層がはがれ、電池のサイク
ル特性が悪化するからである。そのため、集電体と活物
質との密着性を改良するために例えば特開平８−３２１
３０１号公報にはアルミナ粉、ダイヤモンド粉などの集
電体よりも硬度が高い添加剤粉末を加えることが提案さ
れている。2. Description of the Related Art Conventionally, in the production of lithium secondary batteries, it has been important to improve the adhesion between a current collector and a paste layer applied to the surface of the current collector. If the adhesiveness is poor, the paste layer peels off during the assembly of the battery, and the cycle characteristics of the battery deteriorate. Therefore, in order to improve the adhesion between the current collector and the active material, for example, JP-A-8-321
No. 301 proposes to add an additive powder having a higher hardness than a current collector such as alumina powder and diamond powder.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、この製
造方法により作製した極板においては、ペースト状態で
の負極活物質と結着剤および増粘剤との混合度は改善さ
れたが、ペースト保管中において分離や沈降などが生じ
た。また、塗布乾燥後の活物質同士の結着性および集電
体の密着性が悪く、高温保存中や充放電を繰り返して使
用するうちに集電体からの活物質からの剥離、脱落が生
じ、放電容量の低下や負荷特性の悪化を促すといった問
題があった。However, in the electrode plate manufactured by this manufacturing method, the degree of mixing of the negative electrode active material with the binder and the thickener in the paste state was improved, but during the paste storage. , Separation and sedimentation occurred. In addition, the adhesion between the active materials after application and drying and the adhesion of the current collector are poor, and the active material may peel off or fall off from the current collector during high-temperature storage or repeated charge / discharge. In addition, there is a problem that the discharge capacity is reduced and the load characteristics are deteriorated.
【０００４】[0004]
【発明の実施の形態】本発明の電池では、リチウムを吸
蔵、放出可能な負極材料、結着剤、増粘剤及び分散剤を
混練分散して負極ペーストを用いた負極板において、増
粘剤としてポリアクリル酸ソーダ、分散剤としてβ−ナ
フタリンスルホン酸ホルマリン縮合物のナトリウム塩を
用いるものである。この負極板を使用した電池は充放電
を繰り返しても、充放電容量の劣化や負荷特性の劣化を
抑えることができる。さらに好ましくは、前記増粘剤の
総量に対する前記分散剤の添加量の比率が０．０１〜５
重量％とするものである。BEST MODE FOR CARRYING OUT THE INVENTION In a battery of the present invention, a negative electrode plate using a negative electrode paste obtained by kneading and dispersing a negative electrode material capable of inserting and extracting lithium, a binder, a thickener and a dispersant is used. And sodium salt of a β-naphthalenesulfonic acid formalin condensate as a dispersant. The battery using this negative electrode plate can suppress the deterioration of the charge / discharge capacity and the deterioration of the load characteristics even after repeated charge / discharge. More preferably, the ratio of the amount of the dispersant added to the total amount of the thickener is 0.01 to 5%.
% By weight.
【０００５】[0005]
【実施例】以下、本発明の実施例を説明する。Embodiments of the present invention will be described below.
【０００６】本実施例では、リチウムを吸蔵、放出可能
な負極材料として、鱗片状黒鉛粉末５０重量部、結着剤
としてスチレンブタジエンゴム５重量部、そして増粘剤
としてポリアクリル酸ソーダ１重量部、分散剤としてβ
−ナフタリンスルホン酸ホルマリン縮合物のナトリウム
塩をポリアクリル酸ソーダに対して１重量部添加した混
合粉１重量部に対して水９９重量部に溶解した水溶液２
３重量部とを混合分散して負極用ペーストを得た。得ら
れた負極用ペーストをダイコーターを用いて厚さ４０μ
ｍの銅箔からなる負極集電体の両面に塗布乾燥し、厚み
０．２ｍｍに圧延し、切断してシート状の負極板６を作
成した。In this embodiment, 50 parts by weight of flaky graphite powder as a negative electrode material capable of inserting and extracting lithium, 5 parts by weight of styrene butadiene rubber as a binder, and 1 part by weight of sodium polyacrylate as a thickener. , Β as a dispersant
An aqueous solution 2 in which 99 parts by weight of water is dissolved per 1 part by weight of a mixed powder obtained by adding 1 part by weight of a sodium salt of a naphthalenesulfonic acid formalin condensate to sodium polyacrylate;
And 3 parts by weight to obtain a paste for a negative electrode. The obtained paste for the negative electrode was 40 μm thick using a die coater.
A negative electrode current collector made of a copper foil having a thickness of 0.2 m was coated and dried, rolled to a thickness of 0.2 mm, and cut to form a sheet-shaped negative electrode plate 6.
【０００７】正極板５の製造方法を説明する。先ず、正
極活物質としてＬｉＣｏＯ2粉末を５０重量部、導電材
としてアセチレンブラックを１．５重量部、結着剤とし
てＰＴＦＥ５０重量部水溶液を７重量部、そして、増粘
剤として本発明のポリアクリル酸ソーダ０．５重量部と
分散剤β−ナフタリンスルホン酸ホルマリン縮合物のナ
トリウム塩を増粘剤に対して１重量部添加した水溶液３
５重量部を配合し、混合分散して正極ペーストを得た。A method for manufacturing the positive electrode plate 5 will be described. First, 50 parts by weight of LiCoO 2 powder as a positive electrode active material, 1.5 parts by weight of acetylene black as a conductive material, 50 parts by weight of PTFE as a binder, 7 parts by weight of an aqueous solution, and polyacryl of the present invention as a thickener An aqueous solution 3 in which 0.5 part by weight of sodium acid and 1 part by weight of a sodium salt of a dispersant β-naphthalenesulfonic acid formalin condensate are added to a thickener.
5 parts by weight were mixed and dispersed to obtain a positive electrode paste.
【０００８】次に、この正極用ペーストを厚み２０μｍ
のアルミニウム箔にダイコーターを用いて片側の厚さを
１８０μｍに塗布して乾燥後、ＰＴＦＥの溶融温度であ
る２００から３００℃で正極板を加熱して、集電体と正
極合剤層の密着層を改良させる。この後、厚み０．１８
ｍｍに圧延し、切断して正極板を得た。正極板は２００
から３００℃で加熱される際にポリアクリル酸ソーダ及
びβ−ナフタリンスルホン酸ホルマリン縮合物のナトリ
ウム塩が燃焼、分解し、極板内の残量が微少なため、正
極用ペーストの増粘剤としてはポリアクリル酸ソーダ以
外にも、たとえばカルボキシルメチルセルロースのよう
な水溶性のものであればどんなものであってもかまわな
い。Next, this paste for a positive electrode is coated with a thickness of 20 μm.
The thickness of one side is coated to 180 μm using a die coater on an aluminum foil, and dried, and then the positive electrode plate is heated at a melting temperature of PTFE of 200 to 300 ° C. to adhere the current collector and the positive electrode mixture layer. Improve the layer. After this, the thickness 0.18
mm, and cut to obtain a positive electrode plate. Positive plate is 200
The sodium salt of sodium polyacrylate and β-naphthalenesulfonic acid formalin condensate burns and decomposes when heated at 300 ° C., and the remaining amount in the electrode plate is very small. Is not limited to sodium polyacrylate and may be any water-soluble material such as carboxymethyl cellulose.
【０００９】電解液は、炭酸エチレン３０ｖｏｌ％と、
炭酸ジエチル５０ｖｏｌ％とプロピオン酸メチル２０ｖ
ｏｌ％との混合液にＬｉＰＦ6を１ｍｏｌ／ｌの濃度に
溶解したものからなり、電池ケース内に収容され、正、
負極の各材料内に含浸される。The electrolytic solution contains 30 vol% of ethylene carbonate,
Diethyl carbonate 50 vol% and methyl propionate 20 v
% of LiPF 6 dissolved in a mixed solution of 1 mol / l and 1 mol / l, and contained in a battery case.
It is impregnated in each material of the negative electrode.
【００１０】本発明のリチウム二次電池の一実施形態は
図１に示すような円筒型リチウム二次電池で、前記本発
明の負極ペーストの製造法により得られた負極板６を用
いた極板群と、電解液と、これらを収容する電池ケース
からなる。極板群は、シート状の正極板５と、シート状
の前記負極板６と、正極板５と負極板６間を絶縁するシ
ート状のセパレータ７と、正極リード３と、負極リード
９と、上部絶縁板４と、下部絶縁板１０とからなる。正
極板５はアルミニウム箔の両面に塗着形成したものであ
る。セパレータ７は多孔質ポリプロピレンフィルムであ
り、これらが重ねられて渦巻き状に巻回されて、円筒型
の電池ケース内に収容されている。One embodiment of the lithium secondary battery of the present invention is a cylindrical lithium secondary battery as shown in FIG. 1, and an electrode plate using the negative electrode plate 6 obtained by the method for producing the negative electrode paste of the present invention. It comprises a group, an electrolytic solution, and a battery case accommodating them. The electrode plate group includes a sheet-shaped positive electrode plate 5, the sheet-shaped negative electrode plate 6, a sheet-shaped separator 7 that insulates between the positive electrode plate 5 and the negative electrode plate 6, a positive electrode lead 3, and a negative electrode lead 9, It comprises an upper insulating plate 4 and a lower insulating plate 10. The positive electrode plate 5 is formed by coating both sides of an aluminum foil. The separator 7 is a porous polypropylene film, which is stacked and spirally wound, and housed in a cylindrical battery case.
【００１１】電池ケース８は、耐有機電解液性のステン
レス鋼板からなり、このケース８の上部開口部には封口
板１が配されるとともに封口板１とケース８との間を絶
縁する絶縁ガスケット２とからなる。The battery case 8 is made of a stainless steel plate having resistance to organic electrolytic solution. A sealing plate 1 is disposed in an upper opening of the case 8 and an insulating gasket for insulating the sealing plate 1 from the case 8. Consists of two.
【００１２】前記負極ペーストを用いて本発明の負極板
を作製し、その表面状態を確認した。また、本発明の負
極板を用いて本発明の電池を作製し、そのサイクル特性
を確認した。A negative electrode plate of the present invention was prepared using the negative electrode paste, and the surface condition was confirmed. Further, the battery of the present invention was produced using the negative electrode plate of the present invention, and the cycle characteristics thereof were confirmed.
【００１３】また、比較のため以下に示す負極板および
それを用いた電池を作成した。この際、以下に示す負極
の作製以外は実施例と同様にして電池を作製した。For comparison, the following negative electrode plate and a battery using the same were prepared. At this time, a battery was produced in the same manner as in the example except for the production of the negative electrode shown below.
【００１４】（比較例１）負極の作製において、ナトリ
ウム塩を官能基としたカルボキシルメチルセルロースを
増粘剤とした以外は同じ製造方法で作成した負極板を比
較例１の負極板とし、これを用いた電池を比較例１の電
池とした。(Comparative Example 1) A negative electrode plate prepared by the same method as that of Comparative Example 1 except that carboxymethylcellulose having a sodium salt as a functional group was used as a thickener was used as a negative electrode plate of Comparative Example 1. The battery thus obtained was used as the battery of Comparative Example 1.
【００１５】（比較例２）ポリアクリル酸ソーダを増粘
剤とし、分散剤は添加しないこと以外は実施例と同じ製
造方法で作成した負極板を比較例２の負極板とし、これ
を用いた電池を比較例２の電池とした。Comparative Example 2 A negative electrode plate prepared in the same manner as in Example except that sodium polyacrylate was used as a thickener and no dispersant was added was used as a negative electrode plate of Comparative Example 2. The battery was used as the battery of Comparative Example 2.
【００１６】（比較例３）ポリアクリル酸ソーダを増粘
剤とし、分散剤としてβ−ナフタリンスルホン酸ホルマ
リン縮合物のナトリウム塩をポリアクリル酸ソーダに対
して７重量部添加し他は同じ製造方法で作成した負極板
を比較例３の負極板とし、これを用いた電池を比較例３
の電池とした。Comparative Example 3 Same manufacturing method as above except that sodium polyacrylate was used as a thickener, and a sodium salt of β-naphthalenesulfonic acid formalin condensate was added as a dispersant in an amount of 7 parts by weight based on sodium polyacrylate. The negative electrode plate prepared in Comparative Example 3 was used as the negative electrode plate prepared in
Battery.
【００１７】（比較例４）ポリアクリル酸ソーダを増粘
剤とし、分散剤としてβ−ナフタリンスルホン酸ホルマ
リン縮合物のナトリウム塩をポリアクリル酸ソーダに対
して０．００５重量部添加し他は同じ製造方法で作成し
た負極板を比較例４の負極板とし、これを用いた電池を
比較例４の電池とした。(Comparative Example 4) Sodium polyacrylate was used as a thickener, and a sodium salt of β-naphthalenesulfonic acid formalin condensate was added as a dispersant in an amount of 0.005 parts by weight based on sodium polyacrylate. The negative electrode plate produced by the manufacturing method was used as a negative electrode plate of Comparative Example 4, and a battery using the negative electrode plate was used as a battery of Comparative Example 4.
【００１８】本発明の負極板および比較例１〜４の負極
板を下記に示すように評価した。負極板１０００ｃｍ２
の表面に存在する凝集塊およびピンホールの数を目視に
より計数し、（表１）に示した。The negative electrode plates of the present invention and the negative electrode plates of Comparative Examples 1 to 4 were evaluated as shown below. Negative electrode plate 1000cm2
The number of aggregates and pinholes present on the surface of the sample was visually counted, and the results are shown in (Table 1).
【００１９】[0019]
【表１】 [Table 1]
【００２０】（表１）の結果より、分散剤を添加せず、
増粘剤としてポリアクリル酸ソーダを添加するのみで
は、負極材料粒子や結着剤との濡れ性が十分でなく、分
散が不十分となり凝集塊が発生した。また、β−ナフタ
リンスルホン酸ホルマリン縮合物のナトリウム塩の添加
量についても、少なすぎると十分な分散性が得られず、
また過剰に添加すると、逆に再凝集を生じさせてたり、
ペーストが発泡しやすくなり、良好な負極板を得ること
が困難であった。According to the results shown in Table 1, no dispersant was added,
When only sodium polyacrylate was added as a thickener, the wettability with the negative electrode material particles and the binder was not sufficient, the dispersion was insufficient, and agglomerates were generated. Also, regarding the addition amount of the sodium salt of β-naphthalenesulfonic acid formalin condensate, if it is too small, sufficient dispersibility cannot be obtained,
Also, if added in excess, it may cause reaggregation,
The paste easily foamed, and it was difficult to obtain a good negative electrode plate.
【００２１】本発明と比較の電池の充放電サイクル特性
を図２に示す。FIG. 2 shows the charge / discharge cycle characteristics of the battery in comparison with the present invention.
【００２２】このとき、充電は５００ｍＡの定電流で行
い、４．１Ｖになった時点で４．１Ｖの定電圧充電に切
り換え、合計２時間充電を行った。放電は、２０℃中で
７２０ｍＡで行い、放電電位が３．０Ｖになった時点で
放電を終了し次の充電を開始した。図２より本発明の電
池は比較例の電池と比較して、充放電を繰り返しても容
量の劣化が少なくサイクル特性にすぐれていることがわ
かった。At this time, the charging was performed with a constant current of 500 mA, and when the voltage reached 4.1 V, the charging was switched to a constant voltage charging of 4.1 V, and charging was performed for a total of 2 hours. The discharge was performed at 720 mA at 20 ° C. When the discharge potential reached 3.0 V, the discharge was terminated and the next charge was started. From FIG. 2, it was found that the battery of the present invention showed less deterioration in capacity and excellent cycle characteristics even after repeated charging and discharging as compared with the battery of the comparative example.
【００２３】これは本発明の電池は負極中の増粘剤であ
るポリアクリル酸ソーダの電解液や反応による自己劣化
が少なくなり、また、β−ナフタリンスルホン酸ホルマ
リン縮合物のナトリウム塩により、負極材料、結着剤と
の分散性が向上し、集電体との密着性が改良されたため
に、充放電での合剤の膨張収縮によっても集電体からは
がれにくくなったことが原因と考えられる。This is because the battery of the present invention has a reduced self-deterioration due to the electrolyte and reaction of sodium polyacrylate as a thickener in the negative electrode, and the sodium salt of β-naphthalenesulfonic acid formalin condensate reduces the negative electrode. It is considered that the dispersibility of the material and the binder was improved, and the adhesion to the current collector was improved. Can be
【００２４】また、これらの電池を充電状態で６０℃中
で２０日間保存し、その後常温において数回充放電を行
った後、７２０ｍＡで放電を行い電圧が３．０Ｖに達す
るまでの容量を求め、その保存前の容量に対する割合を
（表２）に示した。Further, these batteries were stored in a charged state at 60 ° C. for 20 days, then charged and discharged several times at room temperature, then discharged at 720 mA, and the capacity until the voltage reached 3.0 V was determined. And the ratio to the capacity before storage is shown in (Table 2).
【００２５】[0025]
【表２】 [Table 2]
【００２６】（表２）に示すとおり高温保存においても
本発明の電池は容量劣化が少なくなることが明らかとな
った。As shown in (Table 2), it was found that the battery of the present invention showed less capacity deterioration even at high temperature storage.
【００２７】[0027]
【発明の効果】以上のように、本発明では負極ペースト
に、増粘剤としてポリアクリル酸ソーダ、分散剤として
β−ナフタリンスルホン酸ホルマリン縮合物を加えた負
極板を電池に用いているので、充放電を繰り返しても、
充放電容量の劣化や負荷特性の劣化を抑えることができ
る。また、高温下に長期放置するような厳しい条件下に
おいても、充放電容量の劣化や負荷特性の劣化を抑える
ことができる。また、負極ペーストと集電体との密着性
も向上するために、電池組立工程中におけるペースト層
のはがれがなくなり、作業性を改善することができる。As described above, in the present invention, the negative electrode plate is prepared by adding sodium polyacrylate as a thickener and a β-naphthalenesulfonic acid formalin condensate as a dispersant to the negative electrode paste. Even after repeated charging and discharging,
Deterioration of charge / discharge capacity and deterioration of load characteristics can be suppressed. Further, even under severe conditions such as being left at a high temperature for a long period of time, it is possible to suppress deterioration of the charge / discharge capacity and load characteristics. In addition, since the adhesiveness between the negative electrode paste and the current collector is also improved, the paste layer does not peel off during the battery assembling step, and the workability can be improved.
【図１】本発明のリチウム二次電池の縦断面図FIG. 1 is a longitudinal sectional view of a lithium secondary battery of the present invention.
【図２】本発明と比較例１〜４の電池のサイクル特性を
示す図FIG. 2 is a diagram showing cycle characteristics of the present invention and batteries of Comparative Examples 1 to 4.
１ 封口板 ２ 絶縁ガスケット ３ 正極リード ４ 上部絶縁板 ５ 正極板 ６ 負極板 ７ セパレータ ８ ケース ９ 負極リード １０ 下部絶縁板 DESCRIPTION OF SYMBOLS 1 Sealing plate 2 Insulating gasket 3 Positive electrode lead 4 Upper insulating plate 5 Positive electrode plate 6 Negative electrode plate 7 Separator 8 Case 9 Negative electrode lead 10 Lower insulating plate
───────────────────────────────────────────────────── フロントページの続き (72)発明者 渡邊 庄一郎 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 Ｆターム(参考） 5H003 AA03 AA04 BA00 BA03 BB01 BB11 BB12 BD04 5H014 AA02 BB06 BB08 EE01 HH01 5H029 AJ05 AJ14 AK03 AL06 AL07 AM03 AM05 AM07 BJ02 BJ14 CJ08 CJ22 DJ08 EJ12 HJ01 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shoichiro Watanabe 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture F-term in Matsushita Electric Industrial Co., Ltd. AJ14 AK03 AL06 AL07 AM03 AM05 AM07 BJ02 BJ14 CJ08 CJ22 DJ08 EJ12 HJ01
Claims (3)
結着剤、増粘剤及び分散剤を混練分散することによって
得られる負極ペーストを、集電体上に塗着してなる負極
板を備えるリチウム二次電池であり、前記増粘剤がポリ
アクリル酸ソーダで、前記分散剤がβ−ナフタリンスル
ホン酸ホルマリン縮合物のナトリウム塩であるリチウム
二次電池。1. A negative electrode material capable of inserting and extracting lithium,
A lithium secondary battery including a negative electrode plate obtained by applying a negative electrode paste obtained by kneading and dispersing a binder, a thickener and a dispersant on a current collector, wherein the thickener is polyacrylic. A lithium secondary battery, wherein the dispersing agent is a sodium salt of a formalin condensate of β-naphthalenesulfonic acid and sodium acid.
比率が０．０１〜５重量％である請求項１記載のリチウ
ム二次電池。2. The lithium secondary battery according to claim 1, wherein the ratio of the amount of the dispersant added to the total amount of the thickener is 0.01 to 5% by weight.
剤、ポリアクリル酸ソーダからなる増粘剤、およびβ−
ナフタリンスルホン酸ホルマリン縮合物のナトリウム塩
からなる分散剤を混練して得られるペーストを、集電体
上に塗着して極板を作製するリチウム二次電池用極板の
製造法。3. A material capable of occluding and releasing lithium, a binder, a thickener comprising sodium polyacrylate, and β-
A method for producing an electrode plate for a lithium secondary battery, in which a paste obtained by kneading a dispersant comprising a sodium salt of a naphthalenesulfonic acid formalin condensate is applied on a current collector to produce an electrode plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11056504A JP2000251880A (en) | 1999-03-04 | 1999-03-04 | Lithium secondary battery and manufacture of its electrode plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11056504A JP2000251880A (en) | 1999-03-04 | 1999-03-04 | Lithium secondary battery and manufacture of its electrode plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000251880A true JP2000251880A (en) | 2000-09-14 |
Family
ID=13028962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11056504A Pending JP2000251880A (en) | 1999-03-04 | 1999-03-04 | Lithium secondary battery and manufacture of its electrode plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000251880A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100431459B1 (en) * | 2002-01-11 | 2004-05-12 | 주식회사 엘지화학 | Negative active plate for rechargeable lithium battery and rechargeable lithium battery comprising thereof |
| JP2009278004A (en) * | 2008-05-16 | 2009-11-26 | Nippon Zeon Co Ltd | Electrode for electrical double-layer capacitor and electrical double-layer capacitor |
| CN117832514A (en) * | 2024-03-06 | 2024-04-05 | 中国科学技术大学 | Carbon-coated aluminum foil current collector and application thereof |
-
1999
- 1999-03-04 JP JP11056504A patent/JP2000251880A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100431459B1 (en) * | 2002-01-11 | 2004-05-12 | 주식회사 엘지화학 | Negative active plate for rechargeable lithium battery and rechargeable lithium battery comprising thereof |
| JP2009278004A (en) * | 2008-05-16 | 2009-11-26 | Nippon Zeon Co Ltd | Electrode for electrical double-layer capacitor and electrical double-layer capacitor |
| CN117832514A (en) * | 2024-03-06 | 2024-04-05 | 中国科学技术大学 | Carbon-coated aluminum foil current collector and application thereof |
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