JPH0766832B2 - Non-aqueous solvent secondary battery - Google Patents
Non-aqueous solvent secondary batteryInfo
- Publication number
- JPH0766832B2 JPH0766832B2 JP61128037A JP12803786A JPH0766832B2 JP H0766832 B2 JPH0766832 B2 JP H0766832B2 JP 61128037 A JP61128037 A JP 61128037A JP 12803786 A JP12803786 A JP 12803786A JP H0766832 B2 JPH0766832 B2 JP H0766832B2
- Authority
- JP
- Japan
- Prior art keywords
- negative electrode
- secondary battery
- aqueous solvent
- thin layer
- solvent secondary
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
-
- 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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
-
- 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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/38—Selection of substances as active materials, active masses, active liquids of elements or alloys
-
- 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
- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
- H01M2004/027—Negative electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
-
- 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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
- H01M4/587—Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
-
- 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
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/663—Selection of materials containing carbon or carbonaceous materials as conductive part, e.g. graphite, carbon fibres
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は非水溶媒二次電池に関し、さらに詳しくは、小
型で、充放電サイクル寿命が長く、安定な充放電特性を
有する非水溶媒二次電池に関する。Description: TECHNICAL FIELD The present invention relates to a non-aqueous solvent secondary battery, and more particularly, to a non-aqueous solvent secondary battery having a small size, a long charge / discharge cycle life, and stable charge / discharge characteristics. Regarding the next battery.
［従来の技術］ 従来、非水溶媒二次電池としては、例えば、負極として
金属リチウム（Li）よりなるシートを、正極として遷移
金属のカルコゲン化合物を備え負極を負極端子を兼ねる
負極缶に、正極を正極端子を兼ねる正極缶にそれぞれ着
設せしめてなる構造のものが知られており、このものは
高いエネルギー密度を有することが確認されている。[Prior Art] Conventionally, as a non-aqueous solvent secondary battery, for example, a sheet made of metallic lithium (Li) is used as a negative electrode, a positive electrode is equipped with a transition metal chalcogen compound, and a negative electrode can also functions as a negative electrode terminal. There is known a structure in which each is attached to a positive electrode can that also serves as a positive electrode terminal, and it has been confirmed that this has a high energy density.
ところが、かかる非水溶媒二次電池においては、負極と
して金属リチウムをそのまま使用しているため、放電時
にイオンとして溶出したリチウムが充電時にデンドライ
ト状に析出して、いわゆるリチウムデンドライトを形成
してしまい、このデンドライト状リチウムが極めて活性
な物質であるため、電解液である非水溶媒を分解せし
め、その結果、電池の充放電サイクル特性が劣化すると
いう不都合が生ずる。さらに、極端な場合にはこのリチ
ウムデンドライトが成長して負極と正極との間に介在さ
れたセパレータを通過してしまい、正負両極間が短絡し
てしまうという問題を生ずる。However, in such a non-aqueous solvent secondary battery, since the metal lithium is used as it is as the negative electrode, lithium eluted as ions during discharge is deposited in a dendrite shape during charging, forming a so-called lithium dendrite, Since this dendrite-like lithium is an extremely active substance, it decomposes the nonaqueous solvent that is the electrolytic solution, resulting in the disadvantage that the charge / discharge cycle characteristics of the battery deteriorate. Further, in an extreme case, this lithium dendrite grows and passes through the separator interposed between the negative electrode and the positive electrode, which causes a problem that the positive and negative electrodes are short-circuited.
このような不都合を避けるために、負極として、有機化
合物を焼成して得られた炭素質材料にLiもしくはLiを主
体とするアルカリ金属混合物を含有せしめてなるものを
使用する試みがなされている。これにより、リチウムデ
ンドライトの析出は防止されたが、しかし、この炭素質
材料よりなる負極と、負極端子を兼ねる負極缶との間の
接触抵抗が大きくなるため電池の内部抵抗が増大して大
電流放電が阻まれるという新たな問題が生ずる。負極と
負極缶との間の接触抵抗を低減するためには、例えば炭
素質材料のペレットよりなる負極を導電性材料よりなる
ネットなどに圧着し、このネットを介して負極を負極缶
に着設した構造とすることが考えられる。しかしなが
ら、この場合も、接触抵抗値の低減効果は充分ではな
く、しかも、それに加えてネットに負極ペレットを圧着
する際に負極ペレットが破損したり、また、ネット自体
がかなりの厚みを有するため電池の小型化が阻まれるな
どの問題が存在する。In order to avoid such inconvenience, attempts have been made to use, as the negative electrode, a carbonaceous material obtained by firing an organic compound and containing Li or an alkali metal mixture mainly containing Li. This prevented the deposition of lithium dendrite, but the contact resistance between the negative electrode made of this carbonaceous material and the negative electrode can that also serves as the negative electrode terminal increased, increasing the internal resistance of the battery and increasing the large current. A new problem arises that the discharge is blocked. In order to reduce the contact resistance between the negative electrode and the negative electrode can, for example, a negative electrode made of carbonaceous material pellets is crimped onto a net made of a conductive material, and the negative electrode is attached to the negative electrode can via this net. It is conceivable that the structure is changed. However, even in this case, the effect of reducing the contact resistance value is not sufficient, and in addition, the negative electrode pellet is damaged when the negative electrode pellet is pressure-bonded to the net, and the net itself has a considerable thickness, so There are problems such as the miniaturization of the above is prevented.
［発明が解決しようとする問題点］ 本発明は従来のかかる問題を解消し、Li系の負極活物質
を含有する負極が負極缶に着設されてなる非水溶媒二次
電池において、小型で充放電サイクル特性に優れ、負極
と負極缶との接触抵抗が小さく、大電流放電が可能な非
水溶媒二次電池の提供を目的とする。[Problems to be Solved by the Invention] The present invention solves the conventional problems described above, and provides a non-aqueous solvent secondary battery in which a negative electrode containing a Li-based negative electrode active material is attached to a negative electrode can. An object of the present invention is to provide a non-aqueous solvent secondary battery having excellent charge / discharge cycle characteristics, a low contact resistance between a negative electrode and a negative electrode can, and capable of large-current discharge.
［問題点を解決するための手段］ 本発明者らは、上記目的を達成すべく鋭意研究を重ねた
結果、炭素質材料よりなる負極と負極缶との間にアルカ
リ金属を含有せしめた導電性材料よりなる薄層を介在せ
しめた構造とすると、この薄層により電池の厚さを増大
せしめることなく負極缶と負極との間の接触抵抗を低減
しうることを見出して本発明を完成するに至った。[Means for Solving the Problems] As a result of intensive studies to achieve the above-mentioned object, the present inventors have found that a conductive material containing an alkali metal between a negative electrode made of a carbonaceous material and a negative electrode can. The present invention has been completed by finding that the structure in which a thin layer of a material is interposed can reduce the contact resistance between the negative electrode can and the negative electrode without increasing the thickness of the battery by the thin layer. I arrived.
すなわち、本発明の非水溶媒二次電池は、有機化合物を
焼成してなる炭素質材料と、該炭素質材料に含有された
リチウムもしくはリチウムを主体とするアルカリ金属か
らなる負極を有し、該負極端子を備える負極缶に着設さ
れてなる非水溶媒二次電池において、導電性材料を塗布
した薄層に、アルカリ金属を蒸着法、化学含浸法又は電
解含浸法により含浸させるか、あるいはアルカリ金属の
粉体を混合した導電性材料を塗布した、５〜20μｍ厚さ
の薄層を、該負極と負極缶との間に介在させることを特
徴とする。That is, the non-aqueous solvent secondary battery of the present invention has a carbonaceous material obtained by firing an organic compound and a negative electrode made of lithium or an alkali metal mainly containing lithium contained in the carbonaceous material, In a non-aqueous solvent secondary battery attached to a negative electrode can equipped with a negative electrode terminal, a thin layer coated with a conductive material is impregnated with an alkali metal by a vapor deposition method, a chemical impregnation method or an electrolytic impregnation method, or A thin layer having a thickness of 5 to 20 μm coated with a conductive material mixed with metal powder is interposed between the negative electrode and the negative electrode can.
以下、第１図を参照して本発明の非水溶媒二次電池の構
成について説明する。図において、正極端子を兼ねる正
極缶１内には正極２が正極缶１の底部に着設収納されて
いる。この正極は、とくに限定されないが、例えば、V2
O5、M0O3、WO3、TiS2、CuS、NiPS3、FePS3、VSe2などの
遷移金属カルコゲン化合物を活物質とし、この活物質と
カーボン粉末およびニッケル粉末とを混合、成形して得
られたものなどが使用される。そして、正極２上にはセ
パレータ３を介して負極４が積層されている。電解液を
保持するセパレータ３は、保液性に優れた材料、例え
ば、ポリオレフィン系樹脂の不織布よりなる。Hereinafter, the configuration of the non-aqueous solvent secondary battery of the present invention will be described with reference to FIG. In the figure, a positive electrode 2 is attached and housed at the bottom of the positive electrode can 1 in a positive electrode can 1 which also serves as a positive electrode terminal. This positive electrode is not particularly limited, but for example, V 2
O 5, M 0 O 3, WO 3, TiS 2, CuS, the NIPS 3, FEPS 3, transition metal chalcogen compound such as VSe 2 and the active material, and the active material and the carbon powder and nickel powder mixture, molding The one obtained by the above is used. Then, the negative electrode 4 is laminated on the positive electrode 2 with the separator 3 interposed therebetween. The separator 3 that holds the electrolytic solution is made of a material having excellent liquid retaining properties, for example, a nonwoven fabric of polyolefin resin.
負極４は有機化合物を焼成してなる炭素質材料と、負極
活物質として該炭素質材料に含有せしめられたLiもしく
はLiを主体とするアルカリ金属よりなっている。この炭
素質材料の原料となる有機化合物としては、通常使用さ
れているものであればとくに限定されるものではなく、
例えば、フェノール樹脂、ポリアクリロニトリル、セル
ロースなどの有機高分子化合物を使用することができ
る。また、負極活物質としては、Liのみを使用しても、
Liを他のアルカリ金属、すなわちカリウム（Ｋ）、ナト
リウム（Na）との混合物を使用してもよい。混合物を使
用する場合は、Liの配合比が90重量％以上であることが
好ましい。かかる負極は例えば次のようにして製造され
る。すなわち、まず、上記の有機化合物を所定の条件で
焼成したのち、所定形状、例えばペレット状に成形し、
ついで得られた成形体に上記の負極活物質を含有せしめ
る。この工程には、例えば蒸着法、化学含浸法あるいは
電解含浸法を適用することができる。The negative electrode 4 is composed of a carbonaceous material obtained by firing an organic compound, and Li or an alkali metal mainly composed of Li contained in the carbonaceous material as a negative electrode active material. The organic compound as a raw material of this carbonaceous material is not particularly limited as long as it is a commonly used one,
For example, an organic polymer compound such as phenol resin, polyacrylonitrile, or cellulose can be used. Also, even if only Li is used as the negative electrode active material,
Mixtures of Li with other alkali metals, namely potassium (K), sodium (Na) may be used. When a mixture is used, the Li compounding ratio is preferably 90% by weight or more. Such a negative electrode is manufactured, for example, as follows. That is, first, after firing the above organic compound under predetermined conditions, it is molded into a predetermined shape, for example, a pellet shape,
Then, the obtained molded body is made to contain the above-mentioned negative electrode active material. For this step, for example, a vapor deposition method, a chemical impregnation method or an electrolytic impregnation method can be applied.
この負極４は導電性材料よりなる薄層５を介して負極端
子を兼ねる負極缶６に着設されている。この薄層５を構
成する導電性材料としては、とくに、限定されるもので
はないが、例えばカーボン、ニッケル、銀、ステンレス
鋼などが好適なものとしてあげられる。そして、例え
ば、これらの粉末を負極缶６の内表面に塗布することに
よって薄層５を形成する。この薄層５の厚さは電池の寸
法などによっても異なるが、通常、５〜20μｍ程度とす
ることが好ましい。The negative electrode 4 is attached to a negative electrode can 6 which also serves as a negative electrode terminal via a thin layer 5 made of a conductive material. The conductive material forming the thin layer 5 is not particularly limited, but carbon, nickel, silver, stainless steel and the like are preferable. Then, for example, by applying these powders to the inner surface of the negative electrode can 6, the thin layer 5 is formed. Although the thickness of the thin layer 5 varies depending on the size of the battery and the like, it is usually preferable to set the thickness to about 5 to 20 μm.
この薄層５にはアルカリ金属が含有せしめられている。
このアルカリ金属としては、Li、Ｋ、Naなどがあげら
れ、とくにLiは好ましいものである。薄層５にはこのア
ルカリ金属を含有せしめるためには、負極缶６の内表面
に薄層５を形成したのち、上記のような蒸着法、化学含
浸法または電解含浸法などによりアルカリ金属を含浸せ
しめる方法、または、アルカリ金属を例えば粉末の状態
で導電性材料に混合したのちこの混合物により薄層５を
形成する方法を適用することができる。このときのアル
カリ金属の添加量はとくに限定されるものではなく、例
えば、導電性材料の１〜10重量％程度とすることが好ま
しい。The thin layer 5 contains an alkali metal.
Examples of the alkali metal include Li, K and Na, and Li is particularly preferable. In order to make the thin layer 5 contain this alkali metal, after forming the thin layer 5 on the inner surface of the negative electrode can 6, it is impregnated with the alkali metal by the vapor deposition method, the chemical impregnation method or the electrolytic impregnation method as described above. It is possible to apply a method of forming the thin layer 5 by mixing the conductive material with an alkaline metal in the form of powder and then forming the thin layer 5 with this mixture. The addition amount of the alkali metal at this time is not particularly limited, and for example, it is preferably about 1 to 10% by weight of the conductive material.
そして、負極缶６はガスケット７を介して正極缶１に嵌
合され、正極缶１の開口周縁部が内方に折曲されて電池
全体が封口されている。Then, the negative electrode can 6 is fitted to the positive electrode can 1 via the gasket 7, and the peripheral edge of the opening of the positive electrode can 1 is bent inward to seal the entire battery.
また、電解液としては、通常使用されているものを用い
ればよく、例えば、プロピレンカーボネート、1,2−ジ
メトキシエタン、γ−ブチルラクトンなどの非プロトン
性有機溶媒に、LiClO4、LiAlCl4などのリチウム塩を溶
解せしめてなるものを使用することが好ましい。なお、
本発明の非水溶媒二次電池の形状は第１図の如きボタン
形のものに限られるものではなく、扁平角形電池、筒形
電池などであってもよい。Further, as the electrolytic solution, those which are usually used may be used, for example, propylene carbonate, 1,2-dimethoxyethane, aprotic organic solvents such as γ-butyl lactone, LiClO 4 , LiAlCl 4 and the like. It is preferable to use a product obtained by dissolving a lithium salt. In addition,
The shape of the non-aqueous solvent secondary battery of the present invention is not limited to the button type as shown in FIG. 1, and may be a flat prismatic battery, a cylindrical battery or the like.
［作用］ このように、負極缶と負極の間にアルカリ金属を含有す
る導電性材料よりなる薄層を介在せしめたので、負極缶
と負極との間の電気的導通が良好となり、両者間の接触
抵抗が小さくなって、電池の内部抵抗が減少する。それ
に加えて、極めて薄い層を付加的に形成するだけで上記
の効果が得られるため、電池の小型化に有効である。[Function] Since the thin layer made of the conductive material containing an alkali metal is interposed between the negative electrode can and the negative electrode as described above, the electrical conduction between the negative electrode can and the negative electrode is improved, and the both can be electrically connected. The contact resistance is reduced and the internal resistance of the battery is reduced. In addition, the above effect can be obtained only by forming an extremely thin layer, which is effective for downsizing of the battery.
［実施例］ 実施例 第１図に示したようなボタン形の非水溶媒二次電池（外
径12mm、高さ1.6mm）を製造した。すなわち、まずステ
ンレス鋼製の正極缶１の底部に、V2O5、WO3およびポリ
テトラフルオロエチレン粉末を重量比で90:6:4となるよ
うに混合し、加圧成形して得られたペレット状の正極２
を着設し、しかるのち、この正極２表面にポリプロピレ
ンよりなるセパレータ３を載置した。一方で、負極缶６
の内表面にコロイド状のカーボンを塗布・乾燥すること
により、厚さ10μｍの薄層５を形成し、この薄層に電解
含浸法により金属Liをカーボンに対して２重量％含有せ
しめ、ついで、薄層５上に直径9mm、厚さ0.5mmのペレッ
ト状負極４を積層した。この負極４は、フェノール樹脂
粉末を1000℃で２〜３時間焼成し、得られた焼成体を成
形してペレットを作製し、このペレットに電解含浸法を
適用してリチウムを全体の10重量％含有せしめることに
より製造した。しかるのち、この薄層５および負極４が
積層された負極缶６をガスケット７を介して正極缶１に
嵌合し、電池全体を封口した。なお、電解液としては、
過塩素酸リチウムを溶解したプロピレンカーボネート
（PC）を用いた。[Example] Example A button type non-aqueous solvent secondary battery (outer diameter 12 mm, height 1.6 mm) as shown in FIG. 1 was manufactured. That is, first, V 2 O 5 , WO 3 and polytetrafluoroethylene powder were mixed in the bottom of the positive electrode can 1 made of stainless steel so that the weight ratio was 90: 6: 4, and the mixture was pressure-molded. Pellet-shaped positive electrode 2
Then, the separator 3 made of polypropylene was placed on the surface of the positive electrode 2. On the other hand, the negative electrode can 6
A thin layer 5 having a thickness of 10 μm is formed by coating and drying colloidal carbon on the inner surface of the, and the thin layer is made to contain metal Li in an amount of 2% by weight with respect to carbon by an electrolytic impregnation method. A pellet-shaped negative electrode 4 having a diameter of 9 mm and a thickness of 0.5 mm was laminated on the thin layer 5. For this negative electrode 4, phenol resin powder is fired at 1000 ° C. for 2 to 3 hours, the obtained fired body is molded into pellets, and electrolytic impregnation method is applied to the pellets so that 10% by weight of lithium is contained in the whole. It was manufactured by including it. Then, the negative electrode can 6 in which the thin layer 5 and the negative electrode 4 were laminated was fitted into the positive electrode can 1 via the gasket 7, and the whole battery was sealed. As the electrolytic solution,
Propylene carbonate (PC) in which lithium perchlorate was dissolved was used.
このようにして得られた非水溶媒二次電池につき、以下
に述べる評価試験を行なった。The non-aqueous solvent secondary battery thus obtained was subjected to the evaluation test described below.
（１）15kΩの定抵抗負荷で3Vから1.5Vまでの充放電を
１サイクルとする充放電サイクル試験を行ない、初期放
電容量を100％とした場合の各サイクルにおける容量劣
化率（％）を測定し、第２図に実線Ａで示した。(1) Conduct a charge / discharge cycle test with a constant resistance load of 15 kΩ from 3 V to 1.5 V as one cycle, and measure the capacity deterioration rate (%) in each cycle when the initial discharge capacity is 100%. The solid line A in FIG.
（２）充放電サイクルを3Vから0.9Vとしたことを除いて
は上記（１）と同様にして充放電サイクル試験を行な
い、結果を第３図に実線Ａで示した。(2) A charge / discharge cycle test was conducted in the same manner as in (1) above except that the charge / discharge cycle was changed from 3 V to 0.9 V, and the result is shown by the solid line A in FIG.
比較例 薄層５にアルカリ金属を含有させなかったことを除いて
は、上記実施例と同様にして非水溶媒二次電池を製造
し、同様の評価試験を行なってその結果を第２図および
第３図にそれぞれ実線Ｂで示した。Comparative Example A non-aqueous solvent secondary battery was manufactured in the same manner as in the above-mentioned example except that the thin layer 5 did not contain an alkali metal, and the same evaluation test was performed. Each is shown by a solid line B in FIG.
［発明の効果］ 以上の説明から明らかなように、本発明の非水溶媒二次
電池は、負極活物質が有機化合物の焼成体に含有せしめ
られてなる負極と、負極缶との間にアルカリ金属を含有
した導電性材料よりなる薄層が介在された構成であるた
め、電池を大型化することなく、負極と負極缶との間の
接触抵抗が大幅に低減され、その結果、充放電サイクル
特性が良好となった。したがって、その工業的価値は極
めて大である。[Effects of the Invention] As is clear from the above description, the non-aqueous solvent secondary battery of the present invention is characterized in that the negative electrode active material is contained in the fired body of the organic compound and the negative electrode can has an alkali Since a thin layer made of a conductive material containing a metal is interposed, the contact resistance between the negative electrode and the negative electrode can is significantly reduced without increasing the size of the battery. The characteristics became good. Therefore, its industrial value is extremely large.
第１図は本発明の非水溶媒二次電池の構造の一例を示す
縦断面図、第２図および第３図は充放電サイクル特性を
示す図である。 ４…負極 ５…アルカリ金属を含有した導電性材料よりなる薄層 ６…負極缶。FIG. 1 is a longitudinal sectional view showing an example of the structure of the non-aqueous solvent secondary battery of the present invention, and FIGS. 2 and 3 are views showing charge / discharge cycle characteristics. 4 ... Negative electrode 5 ... Thin layer made of conductive material containing alkali metal 6 ... Negative electrode can.
Claims (2)
該炭素質材料に含有されたリチウムもしくはリチウムを
主体とするアルカリ金属からなる負極を有し、該負極が
負極端子を備える負極缶に着設されてなる非水溶媒二次
電池において、 導電性材料を塗布した薄層に、アルカリ金属を蒸着法、
化学含浸法又は電解含浸法により含浸させたか、あるい
はアルカリ金属の粉末を混合した導電性材料を塗布し
た、５〜20μｍ厚さの薄層を、該負極と負極缶との間に
介在させたことを特徴とする非水溶媒二次電池。1. A carbonaceous material obtained by firing an organic compound,
A non-aqueous solvent secondary battery comprising a negative electrode made of lithium or an alkali metal mainly composed of lithium contained in the carbonaceous material, the negative electrode being attached to a negative electrode can equipped with a negative electrode terminal. A thin layer coated with, an alkali metal vapor deposition method,
A thin layer having a thickness of 5 to 20 μm, which is impregnated by a chemical impregnation method or an electrolytic impregnation method, or is coated with a conductive material mixed with an alkali metal powder, is interposed between the negative electrode and the negative electrode can. A non-aqueous solvent secondary battery characterized by:
銀である特許請求の範囲第１項記載の非水溶媒二次電
池。2. The non-aqueous solvent secondary battery according to claim 1, wherein the conductive material is carbon, nickel or silver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61128037A JPH0766832B2 (en) | 1986-06-04 | 1986-06-04 | Non-aqueous solvent secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61128037A JPH0766832B2 (en) | 1986-06-04 | 1986-06-04 | Non-aqueous solvent secondary battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62285371A JPS62285371A (en) | 1987-12-11 |
| JPH0766832B2 true JPH0766832B2 (en) | 1995-07-19 |
Family
ID=14974952
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61128037A Expired - Fee Related JPH0766832B2 (en) | 1986-06-04 | 1986-06-04 | Non-aqueous solvent secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0766832B2 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6041761A (en) * | 1983-08-17 | 1985-03-05 | Hitachi Maxell Ltd | Lithium organic secondary battery |
| JPS60131769A (en) * | 1983-12-20 | 1985-07-13 | Matsushita Electric Ind Co Ltd | Rechargeable lithium battery |
| JPH0789483B2 (en) * | 1984-05-07 | 1995-09-27 | 三洋化成工業株式会社 | Secondary battery |
| JPS62274569A (en) * | 1986-05-22 | 1987-11-28 | Matsushita Electric Ind Co Ltd | Rechargeable electro-chemical device |
-
1986
- 1986-06-04 JP JP61128037A patent/JPH0766832B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62285371A (en) | 1987-12-11 |
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