JP2002050357A - Battery - Google Patents
BatteryInfo
- Publication number
- JP2002050357A JP2002050357A JP2000232868A JP2000232868A JP2002050357A JP 2002050357 A JP2002050357 A JP 2002050357A JP 2000232868 A JP2000232868 A JP 2000232868A JP 2000232868 A JP2000232868 A JP 2000232868A JP 2002050357 A JP2002050357 A JP 2002050357A
- Authority
- JP
- Japan
- Prior art keywords
- active material
- positive electrode
- material layer
- current collector
- electrode active
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、電池に関し、特
に、携帯電話機等の携帯機器に用いられる電池に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery, and more particularly to a battery used for portable equipment such as a portable telephone.
【０００２】[0002]
【従来の技術】近年、携帯電話機やノート型パソコンの
普及に伴い、それらに用いられる電池の研究が進められ
ている。これらの電池として、繰返し使用できる二次電
池が用いられている。2. Description of the Related Art In recent years, with the spread of portable telephones and notebook personal computers, research on batteries used for them has been advanced. Secondary batteries which can be used repeatedly are used as these batteries.
【０００３】現在使用されている二次電池の多くはニッ
ケル−カドミウム電池である。しかしながら、この電池
は起電力が小さいという欠点がある。[0003] Many of the secondary batteries currently used are nickel-cadmium batteries. However, this battery has the disadvantage that the electromotive force is small.
【０００４】そこで、正極活物質としてリチウムと他の
金属との酸化物を用い、負極活物質としてリチウムを用
いる、いわゆるリチウム二次電池の開発が進められてい
る。Therefore, development of a so-called lithium secondary battery using an oxide of lithium and another metal as a positive electrode active material and using lithium as a negative electrode active material has been advanced.
【０００５】図３は、従来のリチウム二次電池の断面図
である。図３を参照して、リチウム二次電池１００は、
外装缶１と、外装缶１と接触する正極集電体２と、正極
集電体２上に積層された正極活物質層１０７と、正極活
物質層１０７上に積層されたセパレータ８と、セパレー
タ８上に積層された負極活物質層６と、負極活物質層６
上に積層された負極集電体３と、負極集電体３の先端部
である負極端子４と、負極端子４と外装缶１とを絶縁す
る絶縁体５と、外装缶１内に充填された電解液９とを有
する。FIG. 3 is a sectional view of a conventional lithium secondary battery. Referring to FIG. 3, a lithium secondary battery 100 includes:
An outer can 1, a positive electrode current collector 2 in contact with the outer can 1, a positive electrode active material layer 107 stacked on the positive electrode current collector 2, a separator 8 stacked on the positive electrode active material layer 107, 8, a negative electrode active material layer 6 and a negative electrode active material layer 6
The negative electrode current collector 3 stacked thereon, the negative electrode terminal 4 that is the tip of the negative electrode current collector 3, the insulator 5 that insulates the negative electrode terminal 4 from the outer can 1, and the inside of the outer can 1 Electrolyte 9.
【０００６】外装缶１内に正極集電体２、負極集電体
３、負極活物質層６、正極活物質層１０７、セパレータ
８および電解液９が収納されている。[0006] An outer can 1 contains a positive electrode current collector 2, a negative electrode current collector 3, a negative electrode active material layer 6, a positive electrode active material layer 107, a separator 8 and an electrolytic solution 9.
【０００７】外装缶１はアルミニウム合金により構成さ
れ、外装缶１には貫通孔が設けられており、この貫通孔
に負極集電体３が差し込まれている。外装缶１と負極集
電体３との間には、絶縁体５が設けられ、いわゆるガラ
スハーメチック方式に従い負極集電体３と外装缶１とが
電気的に絶縁されている。外装缶１から突出する部分が
負極端子４を構成する。外装缶１は正極端子として作用
する。The outer can 1 is made of an aluminum alloy, and the outer can 1 is provided with a through-hole, into which the negative electrode current collector 3 is inserted. An insulator 5 is provided between the outer can 1 and the negative electrode current collector 3, and the negative electrode current collector 3 and the outer can 1 are electrically insulated according to a so-called glass hermetic method. The portion projecting from the outer can 1 constitutes the negative electrode terminal 4. The outer can 1 functions as a positive electrode terminal.
【０００８】外装缶１の内壁面には正極集電体２が接続
されている。正極集電体２と外装缶１とはスポット溶接
により接続される。正極集電体２は、たとえばアルミニ
ウムにより構成され、薄板形状である。正極集電体２は
負極集電体３と対向し、負極集電体３と正極集電体２と
の間に正極活物質層１０７、セパレータ８および負極活
物質層６が設けられる。A positive electrode current collector 2 is connected to the inner wall surface of the outer can 1. The positive electrode current collector 2 and the outer can 1 are connected by spot welding. The positive electrode current collector 2 is made of, for example, aluminum and has a thin plate shape. The positive electrode current collector 2 faces the negative electrode current collector 3, and the positive electrode active material layer 107, the separator 8, and the negative electrode active material layer 6 are provided between the negative electrode current collector 3 and the positive electrode current collector 2.
【０００９】正極集電体２に接触するように正極活物質
層１０７が設けられている。正極活物質層１０７は、た
とえばリチウムと遷移金属とを複合化して酸化物とした
もの（ＬｉＣｏＯ2）が用いられる。A positive electrode active material layer 107 is provided so as to be in contact with positive electrode current collector 2. For the positive electrode active material layer 107, for example, a material in which lithium and a transition metal are combined to form an oxide (LiCoO 2 ) is used.
【００１０】正極活物質層１０７に接するようにセパレ
ータ８が設けられている。セパレータ８は絶縁体により
構成されるが、セパレータ８は多孔体である。そのた
め、電子およびイオンはセパレータ８内を通過して、正
極活物質層１０７から負極活物質層６へ、または負極活
物質層６から正極活物質層１０７へ移動することができ
る。セパレータ８は正極活物質層１０７と負極活物質層
６とが直接接触するのを防止する働きをする。セパレー
タ８に接するように負極活物質層６が設けられている。
負極活物質層６として金属リチウムを用いることができ
る。[0010] A separator 8 is provided in contact with the positive electrode active material layer 107. The separator 8 is made of an insulator, but the separator 8 is a porous body. Therefore, electrons and ions can pass through the separator 8 and move from the positive electrode active material layer 107 to the negative electrode active material layer 6 or from the negative electrode active material layer 6 to the positive electrode active material layer 107. The separator 8 functions to prevent direct contact between the positive electrode active material layer 107 and the negative electrode active material layer 6. The negative electrode active material layer 6 is provided so as to be in contact with the separator 8.
Metallic lithium can be used for the negative electrode active material layer 6.
【００１１】負極活物質層６に接触するように負極集電
体３が設けられている。負極集電体３は、銅箔により構
成され、薄板形状である。外装缶１内には電解液９が充
填されている。この電解液９は、リチウムとの反応を防
止するために有機系の溶液により構成される。A negative electrode current collector 3 is provided so as to be in contact with negative electrode active material layer 6. The negative electrode current collector 3 is made of a copper foil and has a thin plate shape. An electrolytic solution 9 is filled in the outer can 1. The electrolytic solution 9 is composed of an organic solution in order to prevent a reaction with lithium.
【００１２】[0012]
【発明が解決しようとする課題】以下、従来のリチウム
二次電池で生じる問題について説明する。近年、携帯電
話機では、液晶表示装置のカラー化が進んでいる。これ
に伴い、液晶表示装置での消費電力が増大している。The problems which occur in the conventional lithium secondary battery will be described below. 2. Description of the Related Art In recent years, in mobile phones, colorization of liquid crystal display devices has been advanced. Accordingly, power consumption of the liquid crystal display device has been increasing.
【００１３】しかしながら、上述のリチウム二次電池１
００では、容量が必ずしも大きくないため、携帯電話機
の消費電力の増大に対応できないという問題があった。However, the above-described lithium secondary battery 1
In the case of 00, the capacity is not always large, so that there is a problem that it is not possible to cope with an increase in power consumption of the mobile phone.
【００１４】そこで、この発明は上述のような問題点を
解決するためになされたものであり、容量の大きい電池
を提供することを目的とするものである。Therefore, the present invention has been made to solve the above-mentioned problems, and has as its object to provide a battery having a large capacity.
【００１５】[0015]
【課題を解決するための手段】本発明者は、リチウム二
次電池の正極活物質について研究をした結果、以下の知
見を得た。The present inventor has made the following findings as a result of research on a positive electrode active material of a lithium secondary battery.
【００１６】すなわち、従来、正極活物質として用いら
れているＬｉＣｏＯ2は、電池が放電している間は、以
下のように反応をする。That is, LiCoO 2 conventionally used as a positive electrode active material reacts as follows while the battery is discharging.
【００１７】 ７Ｌｉ0.6ＣｏＯ2 ＋２．８Ｌｉ→７ＬｉＣｏＯ2 これに対して、いわゆるスピネル型構造を有するリチウ
ムとマンガンの酸化物（ＬｉaＭｎbＯc）は、放電中に
以下に示すように反応に関与する。[0017] For 7Li 0.6 CoO 2 + 2.8Li → 7LiCoO 2 This, oxides of lithium and manganese having a so-called spinel structure (Li a Mn b O c) is the reaction as shown below in the discharge Involved.
【００１８】 Ｌｉa-3ＭｎbＯc＋３Ｌｉ→ＬｉaＭｎbＯc この化学反応式でのリチウムの化学量論係数は３であ
る。そのため、スピネル型構造を有するリチウムとマン
ガンとの酸化物を正極活物質として用いることにより、
電池の容量を向上させることができることがわかった。[0018] Li a-3 Mn b O c + 3Li → Li a Mn b O c stoichiometric coefficient of the lithium in the chemical reaction formula is 3. Therefore, by using an oxide of lithium and manganese having a spinel structure as a positive electrode active material,
It was found that the capacity of the battery could be improved.
【００１９】以上の知見によりなされた、この発明の電
池は、正極集電体層と、正極活物質層と、絶縁層と、負
極活物質層と、負極集電体層とを順次積層して形成され
る。正極活物質層は、スピネル型構造を有する、リチウ
ムとマンガンとの酸化物を含む。According to the battery of the present invention, which has been made based on the above findings, the positive electrode current collector layer, the positive electrode active material layer, the insulating layer, the negative electrode active material layer, and the negative electrode current collector layer are sequentially laminated. It is formed. The positive electrode active material layer contains an oxide of lithium and manganese having a spinel structure.
【００２０】このように構成された電池では、正極活物
質層に含まれるリチウムとマンガンとの酸化物がスピネ
ル型構造を有するので、放電中に多くの電子を受取るこ
とができる。そのため電池の容量を向上させることがで
きる。In the battery configured as described above, since the oxide of lithium and manganese contained in the positive electrode active material layer has a spinel structure, many electrons can be received during discharge. Therefore, the capacity of the battery can be improved.
【００２１】なお、スピネル型構造を有するリチウムと
マンガンとの酸化物では、リチウムとマンガンとのモル
比（Ｌｉ／Ｍｎ）は１／２以上２以下である。また。ス
ピネル型構造を有するリチウムとマンガンとの酸化物は
ＬｉＭｎ2Ｏ4とＬｉ2ＭｎＯ3との間の組成を有する。In the oxide of lithium and manganese having a spinel structure, the molar ratio of lithium to manganese (Li / Mn) is 以上 or more and 2 or less. Also. An oxide of lithium and manganese having a spinel structure has a composition between LiMn 2 O 4 and Li 2 MnO 3 .
【００２２】好ましくは、正極活物質層は、Ｌｉ7Ｍｎ5
Ｏ12、Ｌｉ5Ｍｎ4Ｏ9およびＬｉ4Ｍｎ4Ｏ8からなる群よ
り選ばれた少なくとも一種を含む。この場合、これらの
酸化物が安定な構造であるため、電池の信頼性を向上さ
せることができる。なお、これらの酸化物は、放電中以
下のように反応をする。Preferably, the cathode active material layer is made of Li 7 Mn 5
It includes at least one selected from the group consisting of O 12 , Li 5 Mn 4 O 9 and Li 4 Mn 4 O 8 . In this case, since these oxides have a stable structure, the reliability of the battery can be improved. In addition, these oxides react as follows during discharge.
【００２３】 Ｌｉ4Ｍｎ5Ｏ12 ＋３Ｌｉ→Ｌｉ7Ｍｎ5Ｏ12 Ｌｉ2Ｍｎ4Ｏ9 ＋３Ｌｉ→Ｌｉ5Ｍｎ4Ｏ9 ＬｉＭｎ4Ｏ8 ＋３Ｌｉ→Ｌｉ4Ｍｎ4Ｏ8 放電反応に関与する酸化物において、リチウムとマンガ
ンとのモル比が１に近づくほど安定な構造となるため、
容量も向上する。そのため正極活物質層として、Ｌｉ7
Ｍｎ5Ｏ12を用いれば、放電反応の酸化物がＬｉ4Ｍｎ5
Ｏ12となり反応の酸化物が安定して容量も特に大きくな
る。Li 4 Mn 5 O 12 +3 Li → Li 7 Mn 5 O 12 Li 2 Mn 4 O 9 +3 Li → Li 5 Mn 4 O 9 LiMn 4 O 8 +3 Li → Ox involved in the discharge reaction of Li 4 Mn 4 O 8 In, since the structure becomes more stable as the molar ratio of lithium and manganese approaches 1,
The capacity also increases. Therefore, as the positive electrode active material layer, Li 7
When Mn 5 O 12 is used, the oxide of the discharge reaction is Li 4 Mn 5
It becomes O 12 , the oxide of the reaction becomes stable and the capacity becomes particularly large.
【００２４】[0024]
【発明の実施の形態】以下、この発明の実施の形態につ
いて図面を参照して説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００２５】（実施の形態１）図１は、この発明の実施
の形態１に従ったリチウム二次電池の断面図である。図
１を参照して、リチウム二次電池１０は、外装缶１と、
外装缶１と接触する正極集電体２と、正極集電体２上に
積層された正極活物質層７と、正極活物質層７上に積層
されたセパレータ８と、セパレータ８上に積層された負
極活物質層６と、負極活物質層６上に積層された負極集
電体３と、負極集電体３の先端部である負極端子４と、
負極端子４と外装缶１とを絶縁する絶縁体５と、外装缶
１内に充填された電解液９とを有する。(Embodiment 1) FIG. 1 is a sectional view of a lithium secondary battery according to Embodiment 1 of the present invention. Referring to FIG. 1, a lithium secondary battery 10 includes an outer can 1,
The positive electrode current collector 2 in contact with the outer can 1, the positive electrode active material layer 7 laminated on the positive electrode current collector 2, the separator 8 laminated on the positive electrode active material layer 7, and laminated on the separator 8 A negative electrode active material layer 6, a negative electrode current collector 3 laminated on the negative electrode active material layer 6, a negative electrode terminal 4 which is a tip of the negative electrode current collector 3,
It has an insulator 5 that insulates the negative electrode terminal 4 from the outer can 1 and an electrolytic solution 9 filled in the outer can 1.
【００２６】外装缶１内に正極集電体２、負極集電体
３、負極活物質層６、正極活物質層７、セパレータ８お
よび電解液９が収納されている。A positive electrode current collector 2, a negative electrode current collector 3, a negative electrode active material layer 6, a positive electrode active material layer 7, a separator 8 and an electrolytic solution 9 are housed in an outer can 1.
【００２７】外装缶１は、アルミニウム合金により構成
され、長手方向に延びてほぼ直方体形状である。外装缶
１はリチウム二次電池１０の筐体として作用する。外装
缶１には貫通孔が設けられており、この貫通孔に絶縁体
５が嵌め合わされている。The outer can 1 is made of an aluminum alloy, extends in the longitudinal direction, and has a substantially rectangular parallelepiped shape. The outer can 1 functions as a housing for the lithium secondary battery 10. The outer can 1 is provided with a through hole, and the insulator 5 is fitted into the through hole.
【００２８】外装缶１の内部には負極集電体３が設けら
れている。負極集電体３は、外装缶１の一方端面に設け
られた貫通孔に差し込まれて、その一部が外装缶１の一
方端面から突出するように延び、突出する部分が負極端
子４を構成する。A negative electrode current collector 3 is provided inside the outer can 1. The negative electrode current collector 3 is inserted into a through hole provided on one end surface of the outer can 1, and a part thereof extends so as to protrude from the one end surface of the outer can 1, and the protruding portion constitutes the negative electrode terminal 4. I do.
【００２９】外装缶１の他方端面に接触するように正極
集電体２が設けられている。正極集電体２はアルミニウ
ム合金により構成され、外装缶１とスポット溶接されて
電気的に接続されている。正極集電体２は１枚の薄板形
状である。A positive electrode current collector 2 is provided so as to be in contact with the other end surface of the outer can 1. The positive electrode current collector 2 is made of an aluminum alloy, and is electrically connected to the outer can 1 by spot welding. The positive electrode current collector 2 has a single thin plate shape.
【００３０】負極集電体３と正極集電体２とが外装缶１
内で対向し、その間に負極活物質層６、セパレータ８お
よび正極活物質層７が積層されて設けられている。負極
集電体３および正極集電体２のそれぞれを渦巻形状とし
て対向させ、それらの対向面積を大きくして電池の容量
を大きくすることも可能である。The negative electrode current collector 3 and the positive electrode current collector 2 are
The negative electrode active material layer 6, the separator 8, and the positive electrode active material layer 7 are provided between them. It is also possible to make the negative electrode current collector 3 and the positive electrode current collector 2 face each other in a spiral shape and increase the facing area thereof to increase the capacity of the battery.
【００３１】正極集電体２の表面には正極活物質層７が
設けられている。正極活物質層７はスピネル型構造を有
するリチウムとマンガンとの酸化物、すなわちＬｉ7Ｍ
ｎ5Ｏ 12、Ｌｉ5Ｍｎ4Ｏ9、Ｌｉ4Ｍｎ4Ｏ8またはこれら
の混合物を含む。A positive electrode active material layer 7 is provided on the surface of the positive electrode current collector 2.
Is provided. The positive electrode active material layer 7 has a spinel type structure.
Oxide of lithium and manganese, namely Li7M
nFiveO 12, LiFiveMnFourO9, LiFourMnFourO8Or these
Of mixtures.
【００３２】正極活物質層７に接触するようにセパレー
タ８が設けられている。セパレータ８は絶縁性を有する
材料により構成される。セパレータ８は多孔体構造であ
り、イオンおよび電子はセパレータ内の空孔を通過する
ことができる。そのため、正極活物質層７から負極活物
質層６へ、または負極活物質層６から正極活物質層７へ
イオンおよび電子が移動することができる。A separator 8 is provided in contact with the positive electrode active material layer 7. The separator 8 is made of an insulating material. The separator 8 has a porous structure, and ions and electrons can pass through holes in the separator. Therefore, ions and electrons can move from the positive electrode active material layer 7 to the negative electrode active material layer 6 or from the negative electrode active material layer 6 to the positive electrode active material layer 7.
【００３３】セパレータ８に接するように負極活物質層
６が設けられている。負極活物質層６は、たとえば金属
リチウムを含む。The negative electrode active material layer 6 is provided so as to be in contact with the separator 8. Negative electrode active material layer 6 contains, for example, metallic lithium.
【００３４】なお、外装缶１の代わりにラミネートフィ
ルムを用いてもよい。この場合、正極集電体２および負
極集電体３は、それぞれラミネートフィルムから取出さ
れる。また、負極集電体３として銅、ニッケル、鉄、ア
ルミニウムなどを用いることができる。Note that a laminated film may be used instead of the outer can 1. In this case, the positive electrode current collector 2 and the negative electrode current collector 3 are respectively taken out from the laminate film. Further, copper, nickel, iron, aluminum, or the like can be used as the negative electrode current collector 3.
【００３５】さらに、正極集電体２および負極集電体３
と外装缶１とが直接接触するのを防止するため、正極集
電体２および負極集電体３と外装缶１との間に何らかの
絶縁部材を設けてもよい。Further, the positive electrode current collector 2 and the negative electrode current collector 3
Some kind of insulating member may be provided between the positive electrode current collector 2 and the negative electrode current collector 3 and the outer can 1 in order to prevent direct contact between the outer can 1 and the outer can 1.
【００３６】また、外装缶１を鉄で構成する場合には、
正極集電体２を外装缶１の一方端面から突出させ、負極
集電体３を外装缶１に電気的に接続する。When the outer can 1 is made of iron,
The positive electrode current collector 2 is projected from one end face of the outer can 1, and the negative electrode current collector 3 is electrically connected to the outer can 1.
【００３７】電解液９としては、プロピレンカーボネイ
ト（ＰＣ）とジメチルエーテル（ＤＭＥ）の混合溶液を
用いることができる。また、電解液９として、エチレン
カーボネイト（ＥＣ）とジメチルカーボネイト（ＤＭ
Ｃ）との混合溶液を用いることができる。As the electrolytic solution 9, a mixed solution of propylene carbonate (PC) and dimethyl ether (DME) can be used. Further, as the electrolytic solution 9, ethylene carbonate (EC) and dimethyl carbonate (DM
A mixed solution with (C) can be used.
【００３８】図１で示すようなリチウム二次電池１０
（正極活物質層：Ｌｉ7Ｍｎ5Ｏ12）および従来のリチウ
ム二次電池１００（正極活物質層：ＬｉＣｏＯ2）につ
いて、放電電圧と、単位質量あたりの放電容量の関係に
ついての試験を行なった。その結果を図２に示す。A lithium secondary battery 10 as shown in FIG.
(Positive electrode active material layer: Li 7 Mn 5 O 12 ) and a conventional lithium secondary battery 100 (positive electrode active material layer: LiCoO 2 ) were tested for the relationship between discharge voltage and discharge capacity per unit mass. . The result is shown in FIG.
【００３９】図２中の曲線１０１は、本発明品であるリ
チウム二次電池１０についての放電電圧と、単位質量あ
たりの放電容量の関係を示す。曲線１０２は、従来品で
あるリチウム二次電池１００についての放電電圧と、単
位質量あたりの放電容量の関係を示す。図２より、本発
明品では、放電容量が最大で１５０ｍＡｈ／ｇであり、
従来品では放電容量が最大で１４０ｍＡｈ／ｇであり、
本発明より小さい。またいずれの放電電圧でも、本発明
品の方が従来品よりも放電容量が大きい。A curve 101 in FIG. 2 shows the relationship between the discharge voltage and the discharge capacity per unit mass of the lithium secondary battery 10 according to the present invention. A curve 102 shows the relationship between the discharge voltage and the discharge capacity per unit mass of the conventional lithium secondary battery 100. 2, the discharge capacity of the product of the present invention is 150 mAh / g at maximum,
Conventional products have a maximum discharge capacity of 140 mAh / g,
Smaller than the present invention. At any discharge voltage, the product of the present invention has a larger discharge capacity than the conventional product.
【００４０】以上、この発明の実施の形態について説明
したが、ここで示した実施の形態はさまざまに変形する
ことが可能である。電解液として、上述のものだけでな
く通常リチウム二次電池の電解液として用いられている
あらゆる有機電解液を用いることができる。Although the embodiment of the present invention has been described above, the embodiment shown here can be variously modified. As the electrolytic solution, not only the above-mentioned ones but also any organic electrolytic solution which is usually used as an electrolytic solution for a lithium secondary battery can be used.
【００４１】今回開示された実施の形態はすべての点で
例示であって制限的なものではないと考えられるべきで
ある。本発明の範囲は上記した説明ではなくて特許請求
の範囲によって示され、特許請求の範囲と均等の意味お
よび範囲内でのすべての変更が含まれることが意図され
る。The embodiments disclosed this time are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.
【００４２】[0042]
【発明の効果】この発明に従えば、容量の大きい電池を
得ることができる。According to the present invention, a battery having a large capacity can be obtained.
【図１】 この発明の実施の形態１に従ったリチウム二
次電池の断面図である。FIG. 1 is a sectional view of a lithium secondary battery according to Embodiment 1 of the present invention.
【図２】 図１で示すようなリチウム二次電池１０およ
び従来のリチウム二次電池１００についての、放電電圧
と単位質量あたりの放電容量の関係を示すグラフであ
る。FIG. 2 is a graph showing a relationship between a discharge voltage and a discharge capacity per unit mass of the lithium secondary battery 10 and the conventional lithium secondary battery 100 shown in FIG.
【図３】 従来のリチウム二次電池の断面図である。FIG. 3 is a cross-sectional view of a conventional lithium secondary battery.
２ 正極集電体、３ 負極集電体、６ 負極活物質層、
７ 正極活物質層、８セパレータ、１０ リチウム二次
電池。2 positive electrode current collector, 3 negative electrode current collector, 6 negative electrode active material layer,
7 positive electrode active material layer, 8 separator, 10 lithium secondary battery.
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 5H029 AJ03 AK03 AL12 AM03 AM04 AM05 BJ02 BJ12 DJ07 5H050 AA08 BA16 CA09 CB12 DA04 FA02 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5H029 AJ03 AK03 AL12 AM03 AM04 AM05 BJ02 BJ12 DJ07 5H050 AA08 BA16 CA09 CB12 DA04 FA02
Claims (2)
層と、負極活物質層と、負極集電体層とを順次積層して
形成された電池であって、 前記正極活物質層は、スピネル型構造を有する、リチウ
ムとマンガンとの酸化物を含む、電池。1. A battery formed by sequentially laminating a positive electrode current collector layer, a positive electrode active material layer, an insulating layer, a negative electrode active material layer, and a negative electrode current collector layer, A battery, wherein the material layer has an oxide of lithium and manganese having a spinel structure.
Ｌｉ5Ｍｎ4Ｏ9およびＬｉ4Ｍｎ4Ｏ8からなる群より選ば
れた少なくとも一種を含む、請求項１に記載の電池。2. The method according to claim 1, wherein the positive electrode active material layer comprises Li 7 Mn 5 O 12 ,
Li 5 Mn 4 O 9, and Li 4 containing at least one Mn selected from the group consisting of 4 O 8, battery according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000232868A JP2002050357A (en) | 2000-08-01 | 2000-08-01 | Battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000232868A JP2002050357A (en) | 2000-08-01 | 2000-08-01 | Battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002050357A true JP2002050357A (en) | 2002-02-15 |
Family
ID=18725480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000232868A Pending JP2002050357A (en) | 2000-08-01 | 2000-08-01 | Battery |
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| Country | Link |
|---|---|
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018116892A (en) * | 2017-01-20 | 2018-07-26 | 昭和電工株式会社 | Lithium ion secondary battery and positive electrode active material |
| US11302969B2 (en) | 2017-12-20 | 2022-04-12 | Toyota Jidosha Kabushiki Kaisha | All-solid-state battery and production method therefor |
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| JP2018116892A (en) * | 2017-01-20 | 2018-07-26 | 昭和電工株式会社 | Lithium ion secondary battery and positive electrode active material |
| WO2018135154A1 (en) * | 2017-01-20 | 2018-07-26 | 昭和電工株式会社 | Lithium ion secondary battery and positive electrode active material |
| US11302969B2 (en) | 2017-12-20 | 2022-04-12 | Toyota Jidosha Kabushiki Kaisha | All-solid-state battery and production method therefor |
| US11611110B2 (en) | 2017-12-20 | 2023-03-21 | Toyota Jidosha Kabushiki Kaisha | All-solid-state battery and production method therefor |
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