JPS5846574A - Nonaqueous electrolyte battery and its manufacture - Google Patents

Nonaqueous electrolyte battery and its manufacture

Info

Publication number
JPS5846574A
JPS5846574A JP14248981A JP14248981A JPS5846574A JP S5846574 A JPS5846574 A JP S5846574A JP 14248981 A JP14248981 A JP 14248981A JP 14248981 A JP14248981 A JP 14248981A JP S5846574 A JPS5846574 A JP S5846574A
Authority
JP
Japan
Prior art keywords
active material
negative electrode
electrode active
electrolyte battery
indentations
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
Application number
JP14248981A
Other languages
Japanese (ja)
Inventor
Kohei Yamamoto
浩平 山本
Yoshiro Harada
吉郎 原田
Yuzo Tanaka
田中　雄三
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FDK Corp
Original Assignee
FDK Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by FDK Corp filed Critical FDK Corp
Priority to JP14248981A priority Critical patent/JPS5846574A/en
Publication of JPS5846574A publication Critical patent/JPS5846574A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/06—Electrodes for primary cells

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Primary Cells (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Abstract

PURPOSE:To increase the effective surface area of a negative active material, and reduce the internal resistance of the said material by providing projections and indentations over the surface of the said material which touches a separator. CONSTITUTION:After a negative active material 5 made of a metallic simple substance such as lithium is pressed and fitted into a shallow negative terminal part 2 in a dry atmosphere, projections and indentations 10 are formed on the surface of the material 5 by means of a press-work equipment 20. Next, a separator 6 impregnated with electrolyte is connected over the surface of the projections and indentations 10, and the negative terminal part 2 and a positive can 1 packed with a positive active material 4 are assembled so as to obtain a nonaqueous electrolyte battery. Here, the projections and indentations 10 break through an immobile film formed over the surface of the negative active material 5 during its formation, so that an active metallic surface of the material 5 is exposed. As a result, the surface area of the material 5 is increased, the internal resistance of the material 5 is reduced, and the capacity of the discharge current of the battery is increased.

Description

【発明の詳細な説明】[Detailed description of the invention]

本発明はリチウム等の軽金属を負極活物１［Ｋ用いた非
水電解液電池及びその製造方法に関するものである。 一般に非水電解液電池は特に小形、薄形で高容量を得ら
れることから、例えばボ□タン型、あるいはフィン層電
池として各種小型電子機器の電源として用いられている
。 第１図はそのボタン型非水電解液電池の基本的形状を示
すものであって、このものはケーシングな兼ねえ正極缶
１と、負極端子部２とを絶縁体ガスケツ）３を介しThe present invention relates to a nonaqueous electrolyte battery using a light metal such as lithium as a negative electrode active material, and a method for manufacturing the same. In general, non-aqueous electrolyte batteries are particularly small and thin and can obtain high capacity, and are therefore used as power sources for various small electronic devices, such as button-type or fin layer batteries. Figure 1 shows the basic shape of the button type non-aqueous electrolyte battery, in which a positive electrode can 1, which also serves as a casing, and a negative electrode terminal part 2 are connected via an insulator gasket 3.

【一
体化するとともｋ。 上記正極缶１内に正極活物質４を充填し、かつ負極端子
部２内にり≠ラム等の軽金属からなる負極活物質６を収
容し、更に両極物質４６間にセパレータ６を介挿すると
ともに、該七バーレータ６に有機（あるいは無−）電解
質に含浸し、積層伏、１ｌＫ一体的に組上げたものであ
る。　。 該種卵、水電解液電池において、上記貴極活物質器を構
成するブチ◆＾等の軽金属にあり【は湿性の空気中に曝
しておくと飯化被膜等の不動体化した膜が形成され、こ
れによって上記セパレータとの接触抵抗が大となり充分
な放電電容量を得ら九なくなる欠点が指摘されている〇
またこのような欠点を解消するためには、作業雰囲気と
して乾燥室等で充填及び組立作業をするようにし、また
セパレータの組込直前に表面を研摩して活性な金属単体
表面を露出せしめるようにしているが、周知の如くリチ
ュウム等の軽金属は粘弾性体であるために、その研摩し
た摩擦面の粒子が表層内に喰い込んでしまい、反ってそ
の不動体化した表面を内部に巻込んでしまう形となるた
め、さほどの効果を得られるＫは至らなかった。 ゛本発明は以上の如き問題点を鑑みなされたものであっ
て、上述の負極活物質のセパレータに当接する面に凹凸
を設けるととＫより負極活物質の表面積を増大させると
ともに、該表面の不動体皮膜を除去せしめるようＫし先
非水電解液電池及び該電池の有効な製造方株を提供する
ものである。 以下この発明の実施例を添付図画を参照して詳細に説明
する。 但し、この発明の要部以外会工全て従来の構造及び組成
と同一であるから゛、その全体構成における図面は第１
図を縫用し要部のみについて第２図を用いて説明する。 すなわち、同第２図は第１図の円線ムで囲われるセバレ
ニタ６と負極活物１１［どの境界面を示す。 該負極活物質６は上述のリチウム、またはナトリウム、
カルシウム、！ダネシウムの中から遥ばれ大アルカリ重
えはアルカリ土類金属の一種であって、その１１ｍＩＣ
は鋸歯状の凹凸１ｏが形成され゛、かつこの凹凸１０の
ｉ［ｉＫ上記セパレータ６が密接し？ｉｌ定され【いる
。 し九がって上記構成の接触面を有する非水電解液電池に
おいては、単位大きさあたりの負極活物質６とセパレー
タ６との実効表面積は上記凹凸１０１ｃより同一の電池
に比して大となり、このために内部抵抗がその分小とな
り放電電流容量が大となる。 ゛また上述の如き構造の電池においては特に有機電解質
を−セパレータ６に含浸せしめた電池に最も有効である
。 何故ならば有機電解質を用いた電池においては無機電解
質を用いたものよりも内部抵抗が大であり、したがって
、負極活物質との接触聞積を上述の如き構成により増大
化することは、その内部抵抗の大きさを接触１ＭＩ棟を
大きくすることによりカバーできるからである。 更に上記凹凸１０を設けることは、その形成時に負極活
物質６の表向に形成された不動体被膜をつき破り、活性
な金属表面を露出するために、表面積の増加と並んで内
部抵抗な一少させる上で大いに有効であるが、このもの
の更に具体的で有利な方法につき第８図（ａ）〜（＠）
を用いて説明する。 先ず乾燥室などのセ雰囲気中で浅底容器状をなす負極端
子部２内にリチウム等の金属単体からなる負極活物質６
をその延展性を利用して圧入する（第Ｓ図（ａ）参照）
。 なお、この状態で放置しておいた場合には乾燥ｆ１１１
気中であってもその空気中に含まれる微量水分によらて
、その曝露表面は酸化等により、不動体化展が形成され
る。 次に、上記負極端子部２をプレス加工機ｇ。 のプレーシ２１上に位置決め設置し、下向に鋸歯状凹凸
２！ａを形成した合成樹脂等表面滑性を有するぎンチ！
２を圧着させ、負極活物質６の曝露表ＬＫ上述する凹凸
１０を形成する（第８図（ｂ）参１１）。 次いで直ちに別に調製された電解質を含浸し北上パレー
タ６を上記凹凸１０面に嵌挿する（第８図（・）参照）
。 その後゛常法により正極活物質を充填した正極缶と上記
負極端子部２とを組上げれば同第１図及び亀？！図に示
す非水電解液電池を得られるの！ある。 すなわち本方法においては、負極活物質２のによって、
凹凸１０の形成時に露出した活性な釡属面を不動体化す
ることなく組立てが行えることになる。 次に本発明の具体的実施例について更に説明する。 〔実施例〕 乾燥写囲気中で常法により負軸端子部２内にリチウム金
属単体を圧入し、次にこれを上述のプレス加工機２０に
かけて深さＱ、Ｑ５ｍｓ＋　、ピッチα１６１Ｍの鋸歯
状の凹凸を形成し、押工後直ちに有機電解質を含浸した
七パレータをその凹凸間に嵌挿後、正“ｉ活物質を収容
し苑正極缶と共に組立て【有機−解質電池を作製した。 【比較例】−５ どの方法により組立てた有Ｉａ′ｆｌＬ解質鼠池と、従
来のセパレータとの接触面が平ｆ＃電池とを比較し九と
ころ以下の表に示す結呆を得た。 １う開口ｆｆ５８−４６５７４Ｃ３） 表 なお、電池の大きさは直径２α□ｓｗ、厚さＬ６ｍであ
り、それぞれ１００個組立【、ま九短絡電流内部抵抗は
温度２０±１℃にて測定したときの平均値である・ 以上の表からも明らかなように本発明に係る非水電解液
電池にあっては従来のものに比し【その放電電流容量が
格段と向上しており、かつこのことは上述する如く、負
極活物質のセパレータとの、秘触する向に凹凸を形成す
ることにより単位大きさあたりの実効表ＦＩＩＪＷＩを
増加させると同時にその門凸形成時におい【不動体の層
をつき破って活性な金属露出向をセパレータに接触させ
るととにより、内部抵抗が減少することを示唆するもの
である。[When it comes to integration. The positive electrode can 1 is filled with a positive electrode active material 4, and the negative electrode terminal portion 2 is filled with a negative electrode active material 6 made of a light metal such as ram, and a separator 6 is inserted between the two electrode materials 46. , the seven barreators 6 are impregnated with an organic (or non-electrolyte), and assembled into a 11K unit in a laminated form. . In the seed egg and aqueous electrolyte battery, if the light metals such as ◆^ that constitute the noble electrode active material container are exposed to humid air, a passivated film such as an oxidized film will be formed. It has been pointed out that this increases the contact resistance with the separator, making it difficult to obtain sufficient discharge capacity. In order to eliminate this drawback, it is necessary to fill the work atmosphere in a drying room, etc. The surface of the separator is polished to expose the active metal surface immediately before assembly, but as is well known, light metals such as lithium are viscoelastic, so The particles of the polished friction surface would dig into the surface layer, causing the surface to warp and become an immobile object, so K was not very effective.゛The present invention was made in view of the above-mentioned problems, and by providing unevenness on the surface of the negative electrode active material that contacts the separator, the surface area of the negative electrode active material is increased by K, and the surface area of the negative electrode active material is increased. The object of the present invention is to provide a non-aqueous electrolyte battery that has been pretreated with K to remove the passive film, and an effective method for manufacturing the battery. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, since all the structures other than the main parts of this invention are the same as the conventional structure and composition, the drawing of the overall structure is shown in Part 1.
Only the main parts will be explained with reference to FIG. 2. That is, FIG. 2 shows the interface between the separator 6 and the negative electrode active material 11 surrounded by the circular line in FIG. The negative electrode active material 6 is the above-mentioned lithium or sodium,
calcium,! Danesium is a type of alkaline earth metal that is far away from the alkali metal, and its 11mIC
In this case, sawtooth-like unevenness 1o is formed, and if the separator 6 is in close contact with i[iK of this unevenness 10? It has been determined. Therefore, in a nonaqueous electrolyte battery having a contact surface with the above configuration, the effective surface area of the negative electrode active material 6 and the separator 6 per unit size is larger than that of the same battery due to the unevenness 101c. Therefore, the internal resistance becomes correspondingly smaller and the discharge current capacity becomes larger. ``Furthermore, in a battery having the structure as described above, it is particularly effective for a battery in which the separator 6 is impregnated with an organic electrolyte. This is because a battery using an organic electrolyte has a higher internal resistance than one using an inorganic electrolyte, so increasing the contact area with the negative electrode active material by the above configuration This is because the magnitude of the resistance can be covered by increasing the size of the contact 1MI ridge. Furthermore, providing the above-mentioned unevenness 10 pierces the passive film formed on the surface of the negative electrode active material 6 during formation and exposes the active metal surface, which increases the internal resistance as well as increases the surface area. Although it is very effective in reducing the
Explain using. First, a negative electrode active material 6 made of an elemental metal such as lithium is placed in a negative electrode terminal portion 2 having a shallow container shape in a drying room or other atmosphere.
is press-fitted using its ductility (see Figure S (a)).
. In addition, if you leave it in this state, the dry f111
Even in the air, a passivation layer is formed on the exposed surface due to oxidation due to trace amounts of moisture contained in the air. Next, the negative electrode terminal portion 2 is pressed using a press machine g. Positioned and installed on the plate 21, and saw-toothed unevenness 2! Ginch! has a smooth surface such as the synthetic resin that formed a!
2 to form the unevenness 10 described above in the exposure table LK of the negative electrode active material 6 (see 11 in FIG. 8(b)). Immediately thereafter, the kitakami pallet 6 is impregnated with a separately prepared electrolyte and inserted into the uneven surface 10 (see Fig. 8 (-)).
. After that, if the positive electrode can filled with the positive electrode active material and the negative electrode terminal portion 2 are assembled by a conventional method, the result shown in FIG. ! You can get the non-aqueous electrolyte battery shown in the figure! be. That is, in this method, depending on the negative electrode active material 2,
Assembling can be performed without making the active metal surface exposed during the formation of the unevenness 10 immobile. Next, specific examples of the present invention will be further described. [Example] A single lithium metal is press-fitted into the negative shaft terminal part 2 by a conventional method in a dry atmosphere, and then it is applied to the above-mentioned press machine 20 to form sawtooth-like irregularities with a depth of Q, Q5ms+, and a pitch of α161M. Immediately after pressing, seven pallets impregnated with an organic electrolyte were inserted between the irregularities of the pallet, and then the positive active material was housed and assembled with the positive electrode can. [An organic-electrolyte battery was prepared.] 】-5 Comparing the Ia'flL solute mouse pond assembled by which method with a conventional F# battery with a flat contact surface with the separator, the results shown in the table below were obtained. 1. ff58-46574C3) Table: The size of the battery is 2α□sw in diameter and 6m thick, and 100 pieces each are assembled.The short-circuit current internal resistance is the average value when measured at a temperature of 20±1℃. As is clear from the table above, the discharge current capacity of the non-aqueous electrolyte battery according to the present invention is significantly improved compared to the conventional one, and as mentioned above, By forming unevenness in the direction of contact between the negative electrode active material and the separator, the effective table FIIJWI per unit size is increased, and at the same time, when the gate protrusion is formed, This suggests that internal resistance is reduced by bringing the exposed metal side into contact with the separator.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図はブタンＭ非水電解液゛篭池の基本構造な゛示す
断面図、第２図、は第１図の円線ムで囲われる部分にお
ける本発明に係る要部拡大断１ｌｉＩＩ図、第８　Ｆｙ
Ｊ　（ａ）ｓ（ｂ）＊（ｅ）は本発明の組立過程を示す
説明図である。 １・・・正極缶 ２・・・負極端子部 ４・・・正極活物質 ６・・・負極活物質 ６・・・セパレータ １０・・・凹凸 ２２・・・ポンチ ２２ｍ・・・凹凸 特許出願−大　　富士翫気化学株式会社代理人弁理士　
　　−′色　　健　　軸筒１図 　　　　４ 第２図FIG. 1 is a sectional view showing the basic structure of a butane M non-aqueous electrolyte cage, FIG. 8th Fy
J(a)s(b)*(e) are explanatory views showing the assembly process of the present invention. 1... Positive electrode can 2... Negative electrode terminal part 4... Positive electrode active material 6... Negative electrode active material 6... Separator 10... Unevenness 22... Punch 22m... Unevenness patent application - Dai Fujikan Kagaku Co., Ltd. Representative Patent Attorney
-'Color Ken Shaft cylinder 1 Figure 4 Figure 2

Claims (2)

【特許請求の範囲】[Claims] （１）　　リ゛チウムなどの軽金属からなる負極活物質
と、正極と、１！解液とを有する非水電解液電池におい
て、前記負極活物質の七パレータに当接するｌに凹凸を
設けることにより負極活物質の表面種を増大させるとと
もに、該表面の不動体皮膜を除去せしめたことを特徴と
する非水電解液電池。(1) A negative electrode active material made of a light metal such as lithium, a positive electrode, and 1! In a non-aqueous electrolyte battery having a solution solution, by providing unevenness on the part of the negative electrode active material that contacts the seven pallets, the surface species of the negative electrode active material is increased and the passive film on the surface is removed. A non-aqueous electrolyte battery characterized by: （２）負極端子部を構成するケーシング内に乾燥雰囲気
中でリチウムなどの軽金属単体を充填する工程と、この
幣金属単体の衣圓に妻蕎（凹凸を形成し良ポンチをパン
チングして前記軽金属単体表聞に凹凸を形成する工程と
、次いで直ちに軽金属単体表ｄｌＪ１１Ｃ七パレータを
圧着固定する工程とよりなる非水電解液電池の製造方法
。(2) Filling the casing constituting the negative electrode terminal with a light metal such as lithium in a dry atmosphere; A method for producing a non-aqueous electrolyte battery comprising the steps of forming unevenness on the surface of the single body, and then immediately crimping and fixing the light metal single body dlJ11C seven pallets.
JP14248981A 1981-09-11 1981-09-11 Nonaqueous electrolyte battery and its manufacture Pending JPS5846574A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14248981A JPS5846574A (en) 1981-09-11 1981-09-11 Nonaqueous electrolyte battery and its manufacture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14248981A JPS5846574A (en) 1981-09-11 1981-09-11 Nonaqueous electrolyte battery and its manufacture

Publications (1)

Publication Number Publication Date
JPS5846574A true JPS5846574A (en) 1983-03-18

Family

ID=15316508

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14248981A Pending JPS5846574A (en) 1981-09-11 1981-09-11 Nonaqueous electrolyte battery and its manufacture

Country Status (1)

Country Link
JP (1) JPS5846574A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59208220A (en) * 1983-04-29 1984-11-26 フア−ク・ク−ゲルフイツシエル・ゲオルク・シエ−フエル・コマンデイ−トゲゼルシヤフト・アウフ・アクチエン Lubricating device for double row roller bearing turned at high speed
JPH01241751A (en) * 1988-03-23 1989-09-26 Seiko Electronic Components Ltd Nonaqueous electrolyte cell
JP2012014840A (en) * 2010-06-29 2012-01-19 Panasonic Corp Coin cell and method of manufacturing the same
WO2012042764A1 (en) * 2010-09-29 2012-04-05 パナソニック株式会社 Lithium primary battery and manufacturing method for same

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5654757A (en) * 1979-10-11 1981-05-14 Hitachi Maxell Ltd Manufacture of nonaqueous-electrolyte battery

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5654757A (en) * 1979-10-11 1981-05-14 Hitachi Maxell Ltd Manufacture of nonaqueous-electrolyte battery

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59208220A (en) * 1983-04-29 1984-11-26 フア−ク・ク−ゲルフイツシエル・ゲオルク・シエ−フエル・コマンデイ−トゲゼルシヤフト・アウフ・アクチエン Lubricating device for double row roller bearing turned at high speed
JPH01241751A (en) * 1988-03-23 1989-09-26 Seiko Electronic Components Ltd Nonaqueous electrolyte cell
JP2012014840A (en) * 2010-06-29 2012-01-19 Panasonic Corp Coin cell and method of manufacturing the same
WO2012042764A1 (en) * 2010-09-29 2012-04-05 パナソニック株式会社 Lithium primary battery and manufacturing method for same
JP5551259B2 (en) * 2010-09-29 2014-07-16 パナソニック株式会社 Lithium primary battery and manufacturing method thereof
US9017865B2 (en) 2010-09-29 2015-04-28 Panasonic Intellectual Property Management Co., Ltd. Lithium primary battery and method of producing same

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