JPH11238526A - Nonaqueous system secondary battery - Google Patents
Nonaqueous system secondary batteryInfo
- Publication number
- JPH11238526A JPH11238526A JP10038576A JP3857698A JPH11238526A JP H11238526 A JPH11238526 A JP H11238526A JP 10038576 A JP10038576 A JP 10038576A JP 3857698 A JP3857698 A JP 3857698A JP H11238526 A JPH11238526 A JP H11238526A
- Authority
- JP
- Japan
- Prior art keywords
- current collector
- negative electrode
- positive electrode
- film portion
- secondary 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.)
- 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、軽量な非水系二次
電池に関する。The present invention relates to a lightweight non-aqueous secondary battery.
【０００２】[0002]
【従来の技術】近年、高エネルギー密度の期待できる非
水系二次電池の研究開発が活発になされ、たとえば、リ
チウムイオンの挿入放出が可能な活物質を正極及び負極
に有するリチウムイオン二次電池が、小型軽量が要求さ
れる携帯電話やノートパソコン等の電源として広く使用
されるようになっている。2. Description of the Related Art In recent years, non-aqueous secondary batteries that can be expected to have high energy density have been actively researched and developed. For example, a lithium ion secondary battery having an active material capable of inserting and releasing lithium ions in a positive electrode and a negative electrode has been developed. It has been widely used as a power source for portable telephones, notebook computers, and the like that require small size and light weight.
【０００３】ここで、リチウムイオン二次電池の正極活
物質としては、例えば遷移金属の酸化物、負極活物質と
しては焼成炭素質材料が用いられ、これら正極活物質又
は負極活物質にアセチレンブラックやグラファイト等の
導電性カーボンや結着剤などを加えたものを有機溶剤に
分散させペースト状合剤を調製し、これを集電体となる
金属箔に塗布し、乾燥させて有機溶剤を除去して正極又
は負極が作製される。さらに正極と負極が、間にセパレ
ータを介して巻合された後、円筒形あるいは角形の電池
容器に上記巻合された素電池体が挿入され、電解液注入
後、容器が封口されることにより電池が製造される。Here, for example, an oxide of a transition metal is used as a positive electrode active material of a lithium ion secondary battery, and a calcined carbonaceous material is used as a negative electrode active material, and acetylene black or acetylene black is used as the positive electrode active material or the negative electrode active material. A paste mixture prepared by adding conductive carbon such as graphite or a binder to an organic solvent is prepared, applied to a metal foil serving as a current collector, and dried to remove the organic solvent. Thus, a positive electrode or a negative electrode is manufactured. Further, after the positive electrode and the negative electrode are wound with a separator between them, the wound unit cell is inserted into a cylindrical or square battery container, and after the electrolyte is injected, the container is sealed. A battery is manufactured.
【０００４】[0004]
【発明が解決しようとする課題】上述の方法で製造され
る電池において、素電池体は、電池全体の重量の半分近
くを占めるため、電池の軽量化のためには素電池体を軽
量化する必要がある。特に素電池体の中でも、金属部材
からなる集電体の軽量化が必要とされている。しかしな
がら、軽量化のため、集電体を薄くすると集電体の機械
強度が低下し、上記素電池体を製造する際、素電池体の
破断や歪みなどが生じ易くなる、また電池の機械強度が
低下するという問題があり、電池の軽量化と電池への機
械強度付与の両者を満たすことは困難であった。In the battery manufactured by the above-described method, the unit cell occupies nearly half of the weight of the whole battery. There is a need. In particular, among the unit cells, a current collector made of a metal member needs to be reduced in weight. However, when the current collector is made thinner for weight reduction, the mechanical strength of the current collector decreases, and when the above-mentioned unit cell is manufactured, the cell unit is easily broken or distorted. And it has been difficult to satisfy both the weight reduction of the battery and the provision of mechanical strength to the battery.
【０００５】そこで本発明は、軽量化され、機械強度が
付与された非水系二次電池を提供することを目的とし
た。[0005] Accordingly, an object of the present invention is to provide a non-aqueous secondary battery which is reduced in weight and provided with mechanical strength.
【０００６】[0006]
【課題を解決するための手段】本発明は、金属からなる
導電膜部と高分子膜からなる支持体膜部とを有する正極
集電体及び負極集電体を用いて電池を構成すると、電池
が軽量化されるとともに、機械強度が向上することに着
目されてなされたもので、本発明は、リチウムイオンを
挿入放出可能な活物質を含む正極及び負極を有する非水
系二次電池において、正極集電体と該正極集電体に積層
された正極材層とからなる正極と、負極集電体と該負極
集電体に積層された負極材層とからなる負極とを有し、
上記正極集電体がアルミニウム、チタン及びステンレス
から選ばれた金属からなる導電膜部と、高分子膜からな
る支持体膜部とからなり、上記負極集電体が銅族及び白
金族から選ばれた金属からなる導電膜部と、高分子膜部
からなる支持体膜部とからなることを特徴とする非水系
二次電池にある。According to the present invention, there is provided a battery comprising a positive electrode current collector and a negative electrode current collector having a conductive film portion made of a metal and a support film portion made of a polymer film. The present invention has been made with a focus on improving the mechanical strength while reducing the weight, the present invention is a non-aqueous secondary battery having a positive electrode and a negative electrode containing an active material capable of inserting and releasing lithium ions, the positive electrode A positive electrode including a current collector and a positive electrode layer stacked on the positive electrode current collector, and a negative electrode including a negative electrode current collector and a negative electrode layer stacked on the negative electrode current collector,
The positive electrode current collector includes a conductive film portion made of a metal selected from aluminum, titanium, and stainless steel, and a support film portion made of a polymer film, and the negative electrode current collector is selected from a copper group and a platinum group. A non-aqueous secondary battery comprising a conductive film portion made of a metal and a support film portion made of a polymer film portion.
【０００７】上記集電体を、導電膜部と支持体膜部から
なる構成とし、さらに支持体膜部を高分子膜部からなる
構成とすることにより、導電膜部を薄くすることができ
るため電池を軽量化できる。また高分子膜が可撓性を有
するため、折曲げや引張り等の変形に耐えうる機械強度
を電池に付与できる。Since the current collector has a structure including a conductive film portion and a support film portion, and the support film portion includes a polymer film portion, the conductive film portion can be thinned. Battery weight can be reduced. In addition, since the polymer film has flexibility, the battery can be provided with mechanical strength that can withstand deformation such as bending and tension.
【０００８】また、上記正極集電体及び負極集電体の導
電膜部を上記高分子膜の片面又は両面に蒸着法又はスパ
ッタリング法により積層することが望ましい。蒸着法又
はスパッタリング法を用いることにより、薄膜の導電膜
部を形成できるため、集電体が軽量化できる。It is preferable that the conductive film portions of the positive electrode current collector and the negative electrode current collector are laminated on one or both surfaces of the polymer film by a vapor deposition method or a sputtering method. By using a vapor deposition method or a sputtering method, a thin conductive film portion can be formed; thus, the weight of the current collector can be reduced.
【０００９】また、上記正極集電体及び負極集電体の導
電膜部に金属箔を用い、金属箔を高分子膜の片面又は両
面に圧着して積層しても良い。金属箔に高分子膜は容易
に圧着でき、また金属箔の高い導電性により、高い集電
効果が得られる。Further, a metal foil may be used for the conductive film portion of the positive electrode current collector and the negative electrode current collector, and the metal foil may be laminated by pressing on one or both sides of the polymer film. The polymer film can be easily pressed on the metal foil, and a high current collecting effect can be obtained due to the high conductivity of the metal foil.
【００１０】また、上記正極集電体及び負極集電体の導
電膜部と支持体膜部の厚さが、それぞれ０.０５μｍ〜
１０μｍ、０.５μｍ〜１００μｍであることが望まし
い。導電膜部と支持体部の厚さが上記範囲にあれば、軽
量化できるとともに折曲げや引張り等に耐えうる機械強
度を有し、さらに高い導電性が得られる。The thicknesses of the conductive film portion and the support film portion of the positive electrode current collector and the negative electrode current collector are each 0.05 μm or less.
It is preferably 10 μm, and 0.5 μm to 100 μm. When the thickness of the conductive film portion and the thickness of the support portion are in the above ranges, the weight can be reduced, the mechanical strength can withstand bending, tension, and the like, and higher conductivity can be obtained.
【００１１】[0011]
【発明の実施の形態】以下、本発明を詳細に説明する。
本発明の非水系二次電池の正極集電体の導電膜部に用い
る金属は、アルミニウム、チタン及びステンレスのいず
れであっても良く、２種以上を併用しても良いが、アル
ミニウムが望ましい。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail.
The metal used for the conductive film portion of the positive electrode current collector of the nonaqueous secondary battery of the present invention may be any of aluminum, titanium, and stainless steel, and two or more of them may be used in combination, but aluminum is preferred.
【００１２】本発明の非水系二次電池の負極集電体の導
電膜部に用いる金属は、銅、金、銀、ルテニウム、ロジ
ウム、パラジウム、オスミウム、イリジウム、白金等か
ら選ばれたいずれの金属を用いても良く、２種以上を併
用しても良いが、銅を用いることが望ましい。The metal used for the conductive film portion of the negative electrode current collector of the non-aqueous secondary battery of the present invention is any metal selected from copper, gold, silver, ruthenium, rhodium, palladium, osmium, iridium, platinum and the like. May be used, or two or more kinds may be used in combination, but it is preferable to use copper.
【００１３】本発明の非水系二次電池の集電体に用いる
高分子膜は、ポリエステル、ポリプロピレン、ポリエチ
レン、ナイロン等のフィルムを用いることができ、導電
膜部の厚さは０.５μｍ〜１００μｍ、好ましくは１０
μｍ〜３０μｍである。As the polymer film used for the current collector of the non-aqueous secondary battery of the present invention, a film of polyester, polypropylene, polyethylene, nylon, or the like can be used, and the thickness of the conductive film portion is 0.5 μm to 100 μm. , Preferably 10
μm to 30 μm.
【００１４】本発明の非水系二次電池に用いる集電体の
望ましい製造方法としては、高分子膜からなる支持体膜
の片面又は両面に蒸着法又はスパッタリング法を用い
て、導電膜部を積層する方法であり、導電膜部の厚さは
０.０５μｍ〜１０μｍ、好ましくは０.１μｍ〜５μｍ
である。蒸着法及びスパッタリング法の代表的な条件
は、以下の通りである。[0014] As a desirable method of manufacturing a current collector used in the non-aqueous secondary battery of the present invention, a conductive film portion is laminated on one or both sides of a support film made of a polymer film by using an evaporation method or a sputtering method. And the thickness of the conductive film portion is 0.05 μm to 10 μm, preferably 0.1 μm to 5 μm.
It is. Typical conditions of the vapor deposition method and the sputtering method are as follows.
【００１５】本発明の非水系二次電池に用いる集電体の
導電膜部には、金属箔を用いても良く、金属箔を高分子
膜に圧着して積層し、集電体を製造する。金属箔の厚さ
は、１μｍ〜１０μｍが望ましい。A metal foil may be used for the conductive film portion of the current collector used in the non-aqueous secondary battery of the present invention, and the metal foil is pressed and laminated on a polymer film to manufacture the current collector. . The thickness of the metal foil is desirably 1 μm to 10 μm.
【００１６】本発明の非水系二次電池の正極活物質とし
て用いられる正極材料は、従来公知の何れの材料も使用
でき、例えば、ＬｉxＣｏＯ2，ＬｉxＮｉＯ2，Ｍｎ
Ｏ2，ＬｉＭｎＯ2，ＬｉxＭｎ2Ｏ4，ＬｉxＭｎ2-yＯ4，
α−Ｖ2Ｏ5，ＴｉＳ2等のいずれの材料を用いても良
い。As the cathode material used as the cathode active material of the non-aqueous secondary battery of the present invention, any conventionally known materials can be used. For example, LixCoO 2 , LixNiO 2 , Mn
O 2, LiMnO 2, LixMn 2 O 4, LixMn 2-y O 4,
Any material such as α-V 2 O 5 and TiS 2 may be used.
【００１７】本発明の非水系二次電池の負極活物質とし
て用いられる負極材料は、黒鉛、焼成炭素質材料、ケイ
素及びケイ素化合物等公知のいずれの材料を用いても良
い。The negative electrode material used as the negative electrode active material of the non-aqueous secondary battery of the present invention may be any known material such as graphite, calcined carbonaceous material, silicon and silicon compound.
【００１８】本発明の非水系二次電池に使用される非水
電解質は、有機溶媒にリチウム化合物を溶解させた非水
電解液、又は高分子にリチウム化合物を固溶或いはリチ
ウム化合物を溶解させた有機溶媒を保持させた高分子固
体電解質を用いることができる。非水電解液は、有機溶
媒と電解質とを適宜組み合わせて調製されるが、これら
有機溶媒や電解質はこの種の電池に用いられるものであ
ればいずれも使用可能である。有機溶媒としては、例え
ばプロピレンカーボネート、エチレンカーボネート、ビ
ニレンカーボネート、ジメチルカーボネート、ジエチル
カーボネート、メチルエチルカーボネート、１，２−ジ
メトキシエタン、１，２−ジエトキシエタンメチルフォ
ルメイト、ブチロラクトン、テトラヒドロフラン、２−
メチルテトラヒドロフラン、１,３−ジオキソフラン、
４−メチル−１,３−ジオキソフラン、ジエチルエーテ
ル、スルホラン、メチルスルホラン、アセトニトリル、
プロピオニトリル、ブチロニトリル、バレロニトリル、
ベンゾニトリル、１，２−ジクロロエタン、４−メチル
−２−ペンタノン、１,４−ジオキサン、アニソール、
ジグライム、ジメチルホルムアミド、ジメチルスルホキ
シド等である。これらの溶媒はその１種を単独で使用す
ることができるし、２種以上を併用することもできる。
電解質としては、例えばＬｉＣｌＯ4，ＬｉＡｓＦ6，Ｌ
ｉＰＦ6，ＬｉＢＦ4，ＬｉＢ（Ｃ6Ｈ5）4，ＬｉＣｌ，
ＬｉＢｒ，ＬｉＩ，ＬｉＣＨ3ＳＯ3，ＬｉＣＦ3ＳＯ3，
ＬｉＡｌＣｌ4等が挙げられ、これらの１種を単独で使
用することもできるし、２種以上を併用することもでき
る。The non-aqueous electrolyte used in the non-aqueous secondary battery of the present invention is a non-aqueous electrolyte in which a lithium compound is dissolved in an organic solvent, or a solid solution of a lithium compound or a solution of a lithium compound in a polymer. A polymer solid electrolyte holding an organic solvent can be used. The non-aqueous electrolyte is prepared by appropriately combining an organic solvent and an electrolyte, and any of these organic solvents and electrolytes can be used as long as they are used for this type of battery. As the organic solvent, for example, propylene carbonate, ethylene carbonate, vinylene carbonate, dimethyl carbonate, diethyl carbonate, methyl ethyl carbonate, 1,2-dimethoxyethane, 1,2-diethoxyethane methylformate, butyrolactone, tetrahydrofuran, 2-hydrofuran
Methyltetrahydrofuran, 1,3-dioxofuran,
4-methyl-1,3-dioxofuran, diethyl ether, sulfolane, methylsulfolane, acetonitrile,
Propionitrile, butyronitrile, valeronitrile,
Benzonitrile, 1,2-dichloroethane, 4-methyl-2-pentanone, 1,4-dioxane, anisole,
Diglyme, dimethylformamide, dimethylsulfoxide and the like. One of these solvents can be used alone, or two or more can be used in combination.
As the electrolyte, for example, LiClO 4 , LiAsF 6 , L
iPF 6 , LiBF 4 , LiB (C 6 H 5 ) 4 , LiCl,
LiBr, LiI, LiCH 3 SO 3 , LiCF 3 SO 3 ,
LiAlCl 4 and the like, and one of these can be used alone or two or more can be used in combination.
【００１９】上記高分子固体電解質は、上記の電解質か
ら選ばれる電解質を以下に示す高分子に固溶させたもの
を用いることができる。例えば、ポリエチレンオキサイ
ドやポリプロピレンオキサイドのようなポリエーテル鎖
を有する高分子、ポリエチレンサクシネート、ポリ−カ
プロラクタムのようなポリエステル鎖を有する高分子、
ポリエチレンイミンのようなポリアミン鎖を有する高分
子、ポリアルキレンスルフィドのようなポリスルフィド
鎖を有する高分子が挙げられる。また、高分子固体電解
質として、ポリフッ化ビニリデン、フッ化ビニリデン-
テトラフルオロエチレン共重合体、ポリエチレンオキサ
イド、ポリアクリロニトリル、ポリプロピレンオキサイ
ド等の高分子に上記非水電解液を保持させ上記高分子を
可塑化させたものを用いることもできる。As the above-mentioned solid polymer electrolyte, those obtained by dissolving an electrolyte selected from the above-mentioned electrolytes in the following polymer can be used. For example, a polymer having a polyether chain such as polyethylene oxide or polypropylene oxide, polyethylene succinate, a polymer having a polyester chain such as poly-caprolactam,
Examples include a polymer having a polyamine chain such as polyethyleneimine, and a polymer having a polysulfide chain such as polyalkylene sulfide. Further, as a polymer solid electrolyte, polyvinylidene fluoride, vinylidene fluoride-
It is also possible to use a polymer such as a tetrafluoroethylene copolymer, polyethylene oxide, polyacrylonitrile, or polypropylene oxide in which the above non-aqueous electrolyte is retained and plasticized to polymerize the polymer.
【００２０】また、本発明の非水系二次電池のセパレー
タとしては、多孔性ポリエチレン等の多孔性絶縁シート
を用いることができる。Further, as the separator of the non-aqueous secondary battery of the present invention, a porous insulating sheet such as porous polyethylene can be used.
【００２１】また、本発明の非水系二次電池は、正極と
負極が間にセパレータを介して巻合されても良いし、積
層されても良い。巻合されたあるいは積層された素電池
体は、円筒形あるいは角形の電池容器に収納され、電解
液注入後、容器が封口されることにより電池が製造され
る。高分子固体電解質を非水電解質として用いる場合に
おいては、セパレータが不要となり、高分子固体電解質
を介して正極と負極が積層あるいは巻合される。In the non-aqueous secondary battery of the present invention, the positive electrode and the negative electrode may be wound with a separator between them, or may be stacked. The wound or stacked unit cell body is housed in a cylindrical or square battery container, and after the electrolyte is injected, the container is sealed to manufacture a battery. When a polymer solid electrolyte is used as a non-aqueous electrolyte, a separator is not required, and a positive electrode and a negative electrode are laminated or wound via the polymer solid electrolyte.
【００２２】[0022]
【実施例】以下、実施例を用いて本発明をさらに詳細に
説明する。The present invention will be described in more detail with reference to the following examples.
【００２３】[0023]
【実施例１】真空蒸着装置を用いて幅５０ｍｍ、長さ５
２０ｍｍ、厚さ１８μｍのポリエチレン膜の両面にアル
ミニウムを蒸着して正極集電体、銅を蒸着して負極集電
体を作製した。アルミニム及び銅の厚さは、それぞれ１
μｍであった。Example 1 Using a vacuum deposition apparatus, width 50 mm, length 5
Aluminum was deposited on both sides of a polyethylene film having a thickness of 20 mm and a thickness of 18 μm to prepare a positive electrode current collector, and copper was deposited to prepare a negative electrode current collector. The thickness of the aluminum and copper are each 1
μm.
【００２４】平均粒径７μｍの天然炭素粉末１００ｇに
ポリフッ化ビニリデン（ＰＶＤＦ）１０ｇ、Ｎ−メチル
−２−ピロリドン（ＮＭＰ）を加えてペーストを作製
し、これを幅５０ｍｍ、長さ５２０ｍｍ、厚さ２０μｍ
の上記負極集電体（重量４．２９ｇ）の両面に塗布し、
乾燥後、カレンダプレス加工を施して、厚さ９０μｍ、
密度１．２の負極材層を含む負極を得た。負極の総重量
は６．４８ｇであった。A paste was prepared by adding 10 g of polyvinylidene fluoride (PVDF) and N-methyl-2-pyrrolidone (NMP) to 100 g of natural carbon powder having an average particle diameter of 7 μm, and the paste was prepared with a width of 50 mm, length of 520 mm, and thickness. 20 μm
On both sides of the negative electrode current collector (weight 4.29 g)
After drying, it is subjected to calendar press processing to a thickness of 90 μm,
A negative electrode including a negative electrode material layer having a density of 1.2 was obtained. The total weight of the negative electrode was 6.48 g.
【００２５】コバルト酸リチウム８８ｇに対してアセチ
レンブラック６ｇ、ＰＶＤＦ６ｇにＮＭＰを加えてペー
ストを作製し、これを幅５０ｍｍ、長さ４８０ｍｍの上
記正極集電体の両面に塗布し、乾燥後、カレンダプレス
加工を施して、厚さ９０μｍ、密度２．４の正極材層を
含む正極を得た。正極の総重量は１０．９８ｇであっ
た。A paste is prepared by adding NMP to 6 g of acetylene black and 6 g of PVDF to 88 g of lithium cobaltate, and applying the paste on both surfaces of the above-mentioned positive electrode current collector having a width of 50 mm and a length of 480 mm, drying and calendering. By processing, a positive electrode including a positive electrode material layer having a thickness of 90 μm and a density of 2.4 was obtained. The total weight of the positive electrode was 10.98 g.
【００２６】セパレータには、幅５２ｍｍ、長さ５４０
ｍｍ、厚さ３０μｍのポリエチレン微多孔膜（重量０．
８４ｇ）を２枚用い、両極の短絡を防ぎながら巻合し、
巻合中に幅３ｍｍ、長さ６０ｍｍ、厚さ５０μｍの銅片
の負極接続導体（重量０．０８ｇ）を負極に接触するよ
うに、さらに同じ寸法のアルミ片の正極接続導体（重量
０．０２ｇ）を正極に接触するように巻き込んで、巻体
の片側に負極接続導体が、反対方向には正極接続導体が
突出するようにして、中心に直径２ｍｍの空孔を有する
直径１７．４ｍｍ、長さ５２ｍｍの円筒状巻電池体を得
た。この円筒状巻電池体の総重量は、１９．２４ｇであ
った。The separator has a width of 52 mm and a length of 540.
mm, 30 μm thick microporous polyethylene membrane (weight 0.
84g) and wound while preventing short-circuiting of both electrodes,
During the winding, a negative electrode connecting conductor of copper piece (weight 0.08 g) having a width of 3 mm, a length of 60 mm and a thickness of 50 μm is brought into contact with the negative electrode. ) Is wound so as to be in contact with the positive electrode, and the negative electrode connection conductor is protruded on one side of the winding body, and the positive electrode connection conductor is protruded in the opposite direction. A 52 mm-thick cylindrically wound battery body was obtained. The total weight of the cylindrically wound battery body was 19.24 g.
【００２７】これを直径１８ｍｍ、長さ６７ｍｍ、肉厚
０．２５ｍｍの有底ステンレス容器（重量８．９０ｇ）
に負極接続導体を下になるように入れ、負極接続導体を
缶底の溶接し、電解液４．００ｇを注入した後、正極接
続導体を蓋（重量２．５０ｇ）に溶接し、正極と負極が
短絡しないように缶をかしめて密閉し、直径１８ｍｍ、
長さ６５ｍｍの円筒状電池を得た。この円筒状電池の総
重量は、３４．６４ｇであった。なお、電解液はエチレ
ンカーボネートとジメチルカーボネートの混合溶媒（体
積比１：１）に六フッ化リン酸リチウムを濃度が１ｍｏ
ｌ／ｌとなるように添加したものを用いた。A stainless steel container with a diameter of 18 mm, a length of 67 mm and a wall thickness of 0.25 mm (weight: 8.90 g)
The negative electrode connecting conductor is placed below, the negative electrode connecting conductor is welded to the bottom of the can, 4.00 g of the electrolyte is injected, and then the positive electrode connecting conductor is welded to the lid (weight 2.50 g). Caulked the can to prevent short circuit, and sealed it with a diameter of 18mm.
A cylindrical battery having a length of 65 mm was obtained. The total weight of this cylindrical battery was 34.64 g. The electrolyte was a mixed solvent of ethylene carbonate and dimethyl carbonate (volume ratio 1: 1) containing lithium hexafluorophosphate at a concentration of 1 mo.
1 / l was used.
【００２８】電流密度２ｍＡ／ｃｍ2で、２．５Ｖ〜
４．２Ｖの電圧範囲で充放電を行い、初期容量値とし
て、１０９０ｍＡｈ／ｇが得られた。At a current density of 2 mA / cm 2 ,
Charge / discharge was performed in a voltage range of 4.2 V, and an initial capacity value of 1090 mAh / g was obtained.
【００２９】[0029]
【比較例１】コバルト酸リチウム８８ｇに対してアセチ
レンブラック６ｇ、ＰＶＤＦ６ｇにＮＭＰを加えてペー
ストを作製し、これを幅５０ｍｍ、長さ４８０ｍｍ、厚
さ２０μｍのアルミ箔（重量１．４０ｇ）の両面に塗布
し、乾燥後、カレンダプレスを経て、両面に厚さ１００
μｍ、密度２．４の正極材層を含む正極を得た。正極の
総重量は、１１．７７ｇであった。Comparative Example 1 A paste was prepared by adding NMP to 6 g of acetylene black and 6 g of PVDF to 88 g of lithium cobaltate, and the paste was formed on both sides of an aluminum foil (weight 1.40 g) having a width of 50 mm, a length of 480 mm and a thickness of 20 μm. After drying, apply a thickness of 100
A positive electrode including a positive electrode material layer having a thickness of μm and a density of 2.4 was obtained. The total weight of the positive electrode was 11.77 g.
【００３０】平均粒径７μｍの天然炭素粉末１００ｇに
ポリフッ化ビニリデン（ＰＶＤＦ）１０ｇ、Ｎ−メチル
−２−ピロリドン（ＮＭＰ）を加えてペーストを作製
し、これを幅５０ｍｍ、長さ５２０ｍｍ、厚さ２０μｍ
の銅箔（重量４．２９ｇ）の両面に塗布し、乾燥後、カ
レンダプレス加工を施して、厚さ１００μｍ、密度１．
２の負極材層を含む負極を得た。負極の総重量は９．９
１ｇであった。A paste is prepared by adding 10 g of polyvinylidene fluoride (PVDF) and 100 g of N-methyl-2-pyrrolidone (NMP) to 100 g of natural carbon powder having an average particle size of 7 μm. 20 μm
Is coated on both sides of a copper foil (weight 4.29 g), dried, and calender-pressed to a thickness of 100 μm and a density of 1.
A negative electrode including the negative electrode material layer of No. 2 was obtained. The total weight of the negative electrode is 9.9
1 g.
【００３１】上記正極と負極を用い、実施例１と同様の
方法により、中心に直径２ｍｍの空孔を有する直径１
７．４ｍｍ、長さ５２ｍｍの円筒状巻電池体を得た。こ
の円筒状巻電池体の総重量は、２３．４６ｇであった。Using the above-mentioned positive electrode and negative electrode, the same method as in Example 1 was used to form a hole having a diameter of 2 mm at the center.
A cylindrical wound battery body having a length of 7.4 mm and a length of 52 mm was obtained. The total weight of the cylindrical wound battery body was 23.46 g.
【００３２】ステンレス容器への装填や電解液の注入も
実施例１と同様にして行い、直径１８ｍｍ、長さ６５ｍ
ｍの円筒状電池を得た。この円筒状電池の総重量は３
８．８６ｇであった。The loading into the stainless steel container and the injection of the electrolyte were performed in the same manner as in Example 1, and the diameter was 18 mm and the length was 65 m.
m was obtained. The total weight of this cylindrical battery is 3
8.86 g.
【００３３】[0033]
【発明の効果】以上、述べたように、本発明では、金属
からなる導電膜部を高分子膜からなる支持体膜部に積層
して正極及び負極集電体を形成することにより、導電膜
部を薄くできるため正極及び負極集電体を軽量化するこ
とができ、電池を軽量化できる。さらに正極及び負極集
電体に可撓性を付与することができ、素電池体及び電池
が折曲げや引張り等の変形に対して強くなる。As described above, according to the present invention, a conductive film portion made of a metal is laminated on a support film portion made of a polymer film to form a positive electrode and a negative electrode current collector. Since the portions can be made thin, the weight of the positive electrode and negative electrode current collectors can be reduced, and the weight of the battery can be reduced. Furthermore, flexibility can be imparted to the positive and negative electrode current collectors, and the unit cell and the battery are resistant to deformation such as bending and pulling.
Claims (2)
を含む正極及び負極を有する非水系二次電池において、
正極集電体と該正極集電体に積層された正極材層とから
なる正極と、負極集電体と該負極集電体に積層された負
極材層とからなる負極とを有し、上記正極集電体がアル
ミニウム、チタン及びステンレスから選ばれた金属から
なる導電膜部と、高分子膜からなる支持体膜部とからな
り、上記負極集電体が銅族及び白金族から選ばれた金属
からなる導電膜部と、高分子膜部からなる支持体膜部と
からなることを特徴とする非水系二次電池。1. A non-aqueous secondary battery having a positive electrode and a negative electrode containing an active material capable of inserting and releasing lithium ions,
A positive electrode comprising a positive electrode current collector and a positive electrode material layer laminated on the positive electrode current collector, and a negative electrode comprising a negative electrode current collector and a negative electrode material layer laminated on the negative electrode current collector; The positive electrode current collector is composed of a conductive film portion made of a metal selected from aluminum, titanium, and stainless steel, and a support film portion made of a polymer film, and the negative electrode current collector is selected from a copper group and a platinum group. A non-aqueous secondary battery comprising a conductive film portion made of a metal and a support film portion made of a polymer film portion.
部と上記支持体膜部の厚さが、それぞれ０.０５μｍ〜
１０μｍ、０.５μｍ〜１００μｍであることを特徴と
する請求項１に記載の非水系二次電池。2. The thickness of each of the conductive film portion of the positive electrode current collector and the negative electrode current collector and the thickness of the support film portion is 0.05 μm or less.
The non-aqueous secondary battery according to claim 1, wherein the thickness is 10 m, 0.5 m to 100 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10038576A JPH11238526A (en) | 1998-02-20 | 1998-02-20 | Nonaqueous system secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10038576A JPH11238526A (en) | 1998-02-20 | 1998-02-20 | Nonaqueous system secondary battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11238526A true JPH11238526A (en) | 1999-08-31 |
Family
ID=12529124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10038576A Pending JPH11238526A (en) | 1998-02-20 | 1998-02-20 | Nonaqueous system secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11238526A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007102433A1 (en) * | 2006-03-02 | 2007-09-13 | Incorporated National University Iwate University | Secondary battery, manufacturing method thereof and system thereof |
| CN104979564A (en) * | 2015-05-26 | 2015-10-14 | 广东烛光新能源科技有限公司 | Electrochemical energy storage device |
| JP2017168217A (en) * | 2016-03-14 | 2017-09-21 | 三星エスディアイ株式会社Samsung SDI Co., Ltd. | Current collector for flexible secondary battery, electrode for flexible secondary battery, electrode stacked assembly for flexible secondary battery, flexible secondary battery and method of manufacturing electrode for flexible secondary battery |
| JP2019522874A (en) * | 2016-06-14 | 2019-08-15 | ソルヴェイ（ソシエテ アノニム） | Flexible battery |
-
1998
- 1998-02-20 JP JP10038576A patent/JPH11238526A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007102433A1 (en) * | 2006-03-02 | 2007-09-13 | Incorporated National University Iwate University | Secondary battery, manufacturing method thereof and system thereof |
| EP2006942A2 (en) * | 2006-03-02 | 2008-12-24 | Incorporated National University Iwate University | Secondary battery, manufacturing method thereof and system thereof |
| JP5194255B2 (en) * | 2006-03-02 | 2013-05-08 | 国立大学法人岩手大学 | Secondary battery and method and system for manufacturing the same |
| EP2006942A4 (en) * | 2006-03-02 | 2013-07-24 | Nat University Iwate Univ Inc | Secondary battery, manufacturing method thereof and system thereof |
| CN104979564A (en) * | 2015-05-26 | 2015-10-14 | 广东烛光新能源科技有限公司 | Electrochemical energy storage device |
| JP2017168217A (en) * | 2016-03-14 | 2017-09-21 | 三星エスディアイ株式会社Samsung SDI Co., Ltd. | Current collector for flexible secondary battery, electrode for flexible secondary battery, electrode stacked assembly for flexible secondary battery, flexible secondary battery and method of manufacturing electrode for flexible secondary battery |
| JP2019522874A (en) * | 2016-06-14 | 2019-08-15 | ソルヴェイ（ソシエテ アノニム） | Flexible battery |
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