JPH11260346A - Polymer electrolyte battery - Google Patents

Polymer electrolyte battery

Info

Publication number
JPH11260346A
JPH11260346A JP10073241A JP7324198A JPH11260346A JP H11260346 A JPH11260346 A JP H11260346A JP 10073241 A JP10073241 A JP 10073241A JP 7324198 A JP7324198 A JP 7324198A JP H11260346 A JPH11260346 A JP H11260346A
Authority
JP
Japan
Prior art keywords
polymer electrolyte
electrolyte layer
electrode
battery
sheet
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.)
Withdrawn
Application number
JP10073241A
Other languages
Japanese (ja)
Inventor
Tetsuo Kawai
徹夫 川合
Katsuhiro Higaki
勝弘 檜垣
Hiroshi Sugiyama
拓 杉山
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.)
Maxell Holdings Ltd
Original Assignee
Hitachi Maxell Ltd
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 Hitachi Maxell Ltd filed Critical Hitachi Maxell Ltd
Priority to JP10073241A priority Critical patent/JPH11260346A/en
Publication of JPH11260346A publication Critical patent/JPH11260346A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

PROBLEM TO BE SOLVED: To provide a polymer electrolyte battery with high safety even at overcharging and short-circuiting. SOLUTION: In a polymer electrolyte battery, having a sheet-like positive electrode 1, a sheet-like negative electrode 2, and a sheet-like polymer electrolyte layer 3, a material for forming a disturbing material for disturbing ionic conductivity which generates a gas by being exposed to high temperature or high voltage on the inside of the polymer electrolyte layer, on the inside of the electrode, or the interface between the polymer electrolyte layer, and the electrode is included in the polymer electrolyte layer 3, in at least one electrode of the positive electrode 1 and the negative electrode 2, or on the interface between at least one electrode and the polymer electrolyte layer. As the material for generating the gas, lithium carbonate or lithium oxalate is preferable.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、ポリマー電解質電
池に関し、さらに詳しくは、特に携帯用機器、電気自動
車、ロードレベリングなどに使用するのに適したポリマ
ー電解質電池に関する。
The present invention relates to a polymer electrolyte battery, and more particularly, to a polymer electrolyte battery particularly suitable for use in portable equipment, electric vehicles, road leveling, and the like.

【0002】[0002]

【従来の技術】シート状の電解質を用いることにより、
A4版、B5版などの大面積でしかも薄形の電池の作製
が可能になり、各種薄形製品への適用が可能になって、
電池の使用範囲が大きく広がっている。特にポリマー電
解質を用いた電池は、耐漏液性を含めた安全性、貯蔵性
が優れており、しかも薄く、フレキシブルなため、機器
の形状に合わせた電池を設計できるという、今までの電
池にない特徴を持っている。
2. Description of the Related Art By using a sheet-like electrolyte,
It is possible to manufacture large-area and thin batteries such as A4 and B5 plates and apply them to various thin products.
The range of use of batteries is greatly expanding. In particular, batteries using polymer electrolytes have excellent safety and storage properties, including liquid leakage resistance, and are thin and flexible, making it possible to design batteries that match the shape of equipment. Has features.

【0003】このポリマー電解質電池は、通常、アルミ
ニウムフィルムを芯材にしたラミネートフィルムを外装
体に用い、薄いシート状の電極とシート状のポリマー電
解質層とを組み合わせて、薄形電池に仕上げられる。
[0003] This polymer electrolyte battery is usually finished into a thin battery by using a laminate film having an aluminum film as a core material for an outer package and combining a thin sheet-like electrode and a sheet-like polymer electrolyte layer.

【0004】[0004]

【発明が解決しようとする課題】ところで、通常の電解
液系のリチウムイオン二次電池では、火災の発生を防止
するため、セパレータにポリプロピレンまたはポリエチ
レン製の微孔性フィルムを用い、過充電や短絡などが発
生した場合には電池が発熱する熱でセパレータを融解さ
せて、セパレータの空孔を塞ぐことにより、電流の流れ
を阻止して、反応を中止させ、過充電や短絡などに基づ
く火災が発生しないようにするための安全機能が組み込
まれている。
By the way, in a conventional electrolyte-based lithium ion secondary battery, in order to prevent a fire from occurring, a microporous film made of polypropylene or polyethylene is used for a separator, and overcharging or short-circuiting is performed. In such a case, the heat generated by the battery melts the separator, closing the pores in the separator, preventing the flow of current, stopping the reaction, and causing a fire due to overcharge or short circuit. Safety features are included to prevent this from happening.

【0005】しかしながら、ポリマー電解質電池では、
セパレータとしての役割を果たすポリマー電解質層がポ
リマー電解質だけで構成されるか、または不織布などか
らなる支持体にポリマー電解質を担持させることによっ
て構成されるため、セパレータに電解液系リチウムイオ
ン二次電池におけるような安全機能を組み込むことがで
きない。
However, in a polymer electrolyte battery,
Since the polymer electrolyte layer serving as a separator is constituted only by the polymer electrolyte or by supporting the polymer electrolyte on a support made of a nonwoven fabric or the like, the separator in the electrolyte-based lithium ion secondary battery is used. Such a safety function cannot be incorporated.

【0006】このポリマー電解質電池は、電極やポリマ
ー電解質層が本質的に遊離の液を含まない固体であっ
て、液体電解質を用いた電池、つまり電解液を液状を保
った状態で用いた電池とは異なり、漏液のおそれがない
という長所を有するものの、上記のように過充電や短絡
などによって発熱が生じた場合に、その安全対策が施さ
れていないという問題があった。
This polymer electrolyte battery is a battery using a liquid electrolyte in which the electrodes and the polymer electrolyte layer are essentially solids containing no free liquid, that is, a battery using the electrolyte in a liquid state. On the other hand, although there is an advantage that there is no possibility of liquid leakage, there is a problem that safety measures are not taken when heat is generated due to overcharge or short circuit as described above.

【0007】従って、本発明は、上記のような従来技術
の問題点を解決し、安全性の高いポリマー電解質電池を
提供することを目的とする。
Accordingly, an object of the present invention is to solve the above-mentioned problems of the prior art and to provide a highly safe polymer electrolyte battery.

【0008】[0008]

【課題を解決するための手段】本発明は、ポリマー電解
質層中または正極、負極のうち少なくとも一方の電極中
または少なくとも一方の電極とポリマー電解質層との界
面に、高熱または高電圧にさらされることによって気体
を発生する物質を含有させることによって、電池に安全
機能を備えさせ、上記課題を解決したものである。
SUMMARY OF THE INVENTION The present invention relates to a method of exposing a polymer electrolyte layer to high heat or a high voltage in at least one of a positive electrode and a negative electrode or at an interface between at least one electrode and the polymer electrolyte layer. Thus, a battery is provided with a safety function by containing a substance that generates a gas, thereby solving the above problem.

【0009】たとえば、気体を発生させるための物質と
して炭酸リチウムを用い、それをポリマー電解質層中に
含有させた場合について説明すると、炭酸リチウムは熱
により分解して炭酸ガスを発生する。発生した炭酸ガス
はポリマー電解質層中で微細な気泡となる。通常の電解
液系の電池ではガスは流動性のある電解液内を移動し
て、電解液中に固定されることはないが、ポリマー電解
質の場合は、高粘性であるため、ガスは移動することが
できず、ポリマー電解質層を塞ぐので、電流の流れを阻
止して反応を中止させ、安全機能として作用するように
なる。
For example, a case where lithium carbonate is used as a substance for generating a gas and the lithium carbonate is contained in a polymer electrolyte layer will be described. Lithium carbonate is decomposed by heat to generate carbon dioxide gas. The generated carbon dioxide gas becomes fine bubbles in the polymer electrolyte layer. In a normal electrolyte-based battery, gas moves in a fluid electrolyte and is not fixed in the electrolyte, but in the case of a polymer electrolyte, the gas moves because of high viscosity. As a result, the polymer electrolyte layer is blocked, so that the flow of current is stopped and the reaction is stopped, thereby acting as a safety function.

【0010】[0010]

【発明の実施の形態】本発明において、気体を発生させ
る目的でポリマー電解質層中などに含有させる物質とし
ては、たとえば、前記の炭酸リチウムや蓚酸リチウムな
どが挙げられる。
BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, examples of a substance contained in a polymer electrolyte layer for the purpose of generating a gas include the above-mentioned lithium carbonate and lithium oxalate.

【0011】上記炭酸リチウムや蓚酸リチウムなどの気
泡を発生させるための物質をポリマー電解質層中や電極
中に含有させる場合、その量はポリマー電解質層中のポ
リマー電解質100重量部に対して0.02〜2重量
部、特に0.05〜2重量部程度が好ましい。また、気
泡を発生させるための物質を電極とポリマー電解質層と
の界面に含有させる場合、その量はポリマー電解質層中
のポリマー電解質100重量部に対して0.02〜2重
量部、好ましくは0.02〜1重量部をポリマー電解質
層の表面に散布するか、もしくは、電極の表面に散布
し、その後、ポリマー電解質層と電極とを圧着するのが
好ましい。
When a substance for generating bubbles, such as lithium carbonate or lithium oxalate, is contained in the polymer electrolyte layer or the electrode, the amount thereof is 0.02 to 100 parts by weight of the polymer electrolyte in the polymer electrolyte layer. To 2 parts by weight, especially about 0.05 to 2 parts by weight. When a substance for generating bubbles is contained at the interface between the electrode and the polymer electrolyte layer, the amount thereof is 0.02 to 2 parts by weight, preferably 0 to 2 parts by weight, based on 100 parts by weight of the polymer electrolyte in the polymer electrolyte layer. It is preferable to spray 0.02 to 1 part by weight on the surface of the polymer electrolyte layer or on the surface of the electrode, and then press-bond the polymer electrolyte layer and the electrode.

【0012】[0012]

【実施例】つぎに、実施例を挙げて本発明をより具体的
に説明する。ただし、本発明はそれらの実施例のみに限
定されるものではない。
Next, the present invention will be described more specifically with reference to examples. However, the present invention is not limited to only these examples.

【0013】実施例1 この実施例1では炭酸リチウムをポリマー電解質層中に
含有させた場合(正確には、支持体の表面に炭酸リチウ
ムの粉末を配置してポリマー電解質層を作製した場合)
について示す。
Embodiment 1 In this embodiment 1, lithium carbonate is contained in a polymer electrolyte layer (more precisely, when a lithium carbonate powder is arranged on the surface of a support to form a polymer electrolyte layer).
It shows about.

【0014】正極の作製:正極活物質であるLiCoO
2 50重量部、電導助剤であるアセチレンブラック10
重量部、バインダであるポリフッ化ビニリデン10重量
部を均一になるように混合し、さらに電解液40重量部
を加えて混合し、ペースト状の正極合剤を調製した。上
記電解液はプロピレンカーボネートとエチレンカーボネ
ートとの体積比1:1の混合溶媒にLiPF6 を1.2
2モル/リットル溶解させたものである。そして、上記
のように調製したペースト状の正極合剤を集電体となる
アルミニウム箔の一方の面に塗布し、加熱してゲル化さ
せることによりアルミニウム箔上にゲル状の正極合剤層
を形成して、シート状の正極を作製した。
Preparation of positive electrode: LiCoO as positive electrode active material
2 50 parts by weight, acetylene black 10 is a conductive aid
Parts by weight and 10 parts by weight of polyvinylidene fluoride as a binder were uniformly mixed, and further added and mixed with 40 parts by weight of an electrolytic solution to prepare a paste-like positive electrode mixture. The electrolytic solution was prepared by adding LiPF 6 to a mixed solvent of propylene carbonate and ethylene carbonate at a volume ratio of 1: 1 with 1.2.
2 mol / liter dissolved. Then, the paste-like positive electrode mixture prepared as described above is applied to one surface of an aluminum foil serving as a current collector, and heated to gel to form a gel-like positive electrode mixture layer on the aluminum foil. The sheet was formed into a sheet-shaped positive electrode.

【0015】負極の作製:負極活物質である黒鉛40重
量部とポリフッ化ビニリデン5重量部と上記正極に用い
たものと同様の電解液55重量部を混合してペースト状
の負極合剤を調製し、このペースト状の負極合剤を集電
体となる銅箔の一方の面に塗布し、加熱してゲル化させ
ることにより銅箔上にゲル状の負極合剤層を形成して、
シート状の負極を作製した。
Preparation of negative electrode: 40 parts by weight of graphite as a negative electrode active material, 5 parts by weight of polyvinylidene fluoride, and 55 parts by weight of the same electrolytic solution as used for the positive electrode were mixed to prepare a paste-like negative electrode mixture. Then, this paste-like negative electrode mixture is applied to one surface of a copper foil to be a current collector, and heated and gelled to form a gel-like negative electrode mixture layer on the copper foil,
A sheet-shaped negative electrode was produced.

【0016】ポリマー電解質層の作製:厚さ70μmの
ポリオレフィン系不織布を支持体とし、この不織布の表
面にポリマー電解質の0.5重量%に当たる炭酸リチウ
ム(つまり、ポリマー電解質100重量部に対して炭酸
リチウム0.5重量部)の粉末を配置した後、該不織布
に3種類のアクリル系モノマー混合物15重量部とその
重合開始剤である過酸化ベンゾイル0.75重量部と前
記同様の電解液85重量部とを混合した溶液を含浸さ
せ、加熱してモノマーを重合させるとともに全体をゲル
化して、ゲル状ポリマー電解質層を作製した。上記のア
クリル系モノマー混合物は2−エトキシエチルアクリレ
ートとトリエチレングリコールジメタクリレートとエチ
レングリコールエチルカーボネートメタクリレートとを
重量比50:13:33の割合で混合したものである。
Preparation of polymer electrolyte layer: A polyolefin-based nonwoven fabric having a thickness of 70 μm was used as a support, and the surface of the nonwoven fabric was coated with lithium carbonate equivalent to 0.5% by weight of the polymer electrolyte (that is, lithium carbonate based on 100 parts by weight of the polymer electrolyte). 0.5 parts by weight), 15 parts by weight of a mixture of three kinds of acrylic monomers, 0.75 parts by weight of benzoyl peroxide as a polymerization initiator thereof, and 85 parts by weight of the same electrolytic solution as described above. The mixture was impregnated with the mixture, and the mixture was heated to polymerize the monomers and gel the whole, thereby producing a gel polymer electrolyte layer. The acrylic monomer mixture is obtained by mixing 2-ethoxyethyl acrylate, triethylene glycol dimethacrylate, and ethylene glycol ethyl carbonate methacrylate in a weight ratio of 50:13:33.

【0017】このポリマー電解質層を上記正極と負極と
の間に配置し、圧着してユニットセルを構成し、該ユニ
ットセルをポリエステルフィルム−アルミニウムフィル
ム−変性ポリオレフィンフィルムからなる三層構造のラ
ミネートフィルムで外装して、ポリマー電解質電池を作
製した。ただし、上記正極と負極の配置にあたっては両
者の合剤層がポリマー電解質層を介して対向するように
配置した。
This polymer electrolyte layer is disposed between the above-mentioned positive electrode and negative electrode, and pressed to form a unit cell. The unit cell is formed of a three-layer laminated film composed of a polyester film-aluminum film-modified polyolefin film. Outer packaging was used to produce a polymer electrolyte battery. However, in disposing the positive electrode and the negative electrode, they were arranged such that both mixture layers face each other with a polymer electrolyte layer interposed therebetween.

【0018】ここで、上記電池の概略構造を図1を参照
しつつ説明すると、シート状の正極1とシート状の負極
2との間にシート状のポリマー電解質層3が配置してユ
ニットセルが構成され、そのユニットセルをラミネート
フィルムからなる外装体4で外装し、正極1および負極
2から正極端子5および負極端子6を外装体4の外部に
引き出して電池が構成されている。
Here, the schematic structure of the battery will be described with reference to FIG. 1. A sheet-shaped polymer electrolyte layer 3 is disposed between a sheet-shaped positive electrode 1 and a sheet-shaped negative electrode 2 to form a unit cell. The unit cell is packaged with a package 4 made of a laminated film, and a positive electrode terminal 5 and a negative electrode terminal 6 are drawn out of the package 4 from the positive electrode 1 and the negative electrode 2 to form a battery.

【0019】実施例2 実施例1において炭酸リチウムをポリマー電解質層中に
含有させたのに代えて、ポリマー電解質の0.5重量%
に当たる炭酸リチウム粉末を正極の正極合剤層の表面に
塗布した以外は、実施例1と同様にポリマー電解質電池
を作製した。
Example 2 The procedure of Example 1 was repeated, except that lithium carbonate was contained in the polymer electrolyte layer.
A polymer electrolyte battery was produced in the same manner as in Example 1, except that the lithium carbonate powder corresponding to was applied to the surface of the positive electrode mixture layer of the positive electrode.

【0020】実施例3 実施例1において炭酸リチウムをポリマー電解質層中に
含有させたのに代えて、蓚酸リチウムをポリマー電解質
層中にポリマー電解質の1重量%に当たる量で含有させ
た以外は、実施例1と同様にポリマー電解質電池を作製
した。
Example 3 The procedure of Example 1 was repeated, except that lithium oxalate was contained in the polymer electrolyte layer in an amount corresponding to 1% by weight of the polymer electrolyte, instead of including lithium carbonate in the polymer electrolyte layer. A polymer electrolyte battery was produced in the same manner as in Example 1.

【0021】比較例1 炭酸リチウムをポリマー電解質層中に含有させなかった
以外は、実施例1と同様にポリマー電解質電池を作製し
た。
Comparative Example 1 A polymer electrolyte battery was manufactured in the same manner as in Example 1 except that lithium carbonate was not contained in the polymer electrolyte layer.

【0022】比較例2 ポリマー電解質層の支持体としてポリオレフィン不織布
に代えて微孔性ポリプロピレンフィルムを用い、かつ炭
酸リチウムをポリマー電解質層に含有させなかった以外
は、実施例1と同様にポリマー電解質電池を作製した。
Comparative Example 2 A polymer electrolyte battery was prepared in the same manner as in Example 1 except that a microporous polypropylene film was used instead of the polyolefin nonwoven fabric as a support for the polymer electrolyte layer, and that lithium carbonate was not contained in the polymer electrolyte layer. Was prepared.

【0023】上記実施例1〜3および比較例1〜2の電
池の内部抵抗、6V、2Cの定電流定電圧(CCCV
法)で過充電を行った場合の気泡発生状況、発火の有無
を調べた。その結果を表1に示す。上記内部抵抗は、上
記過充電前および過充電後にLCRメータを用い、交流
法(1KHz)で測定し、10Ω以上のものを内部抵抗
が大、2Ω以上で10Ω未満のものを内部抵抗が大〜
中、1Ω以上で2Ω未満のものを内部抵抗が中、1Ω未
満のものを内部抵抗が小として評価した。表1には、過
充電後の内部抵抗の評価結果について示している。ま
た、気泡の発生状況は、過充電試験後の電池を分解し、
ゲル状ポリマー電解質層の近傍による気泡を目視もしく
は顕微鏡観察によって調べ、発火の有無は上記過充電試
験中に発生するか否かを調べた。
The internal resistance of the batteries of Examples 1 to 3 and Comparative Examples 1 and 2, 6 V and 2 C constant current and constant voltage (CCCV
Method), the occurrence of bubbles and the presence or absence of ignition were examined when overcharging was performed. Table 1 shows the results. The internal resistance is measured by an alternating current method (1 KHz) using an LCR meter before and after the overcharging, and the internal resistance is large when the resistance is 10 Ω or more and large when the resistance is 2 Ω or more and less than 10 Ω.
Among them, those with 1 Ω or more and less than 2 Ω were evaluated as having low internal resistance, and those with less than 1 Ω were evaluated as having low internal resistance. Table 1 shows the evaluation results of the internal resistance after overcharge. In addition, the occurrence of air bubbles is determined by disassembling the battery
Air bubbles in the vicinity of the gel polymer electrolyte layer were visually or microscopically examined, and the presence or absence of ignition was examined to determine whether or not it occurred during the overcharge test.

【0024】[0024]

【表1】 [Table 1]

【0025】表1に示すように、実施例1〜3では、過
充電時に電池内部に微気泡が全面に発生し、内部抵抗が
大きくなって、電流の流れを阻害し、発火することがな
かった。また、比較例2も発火することがなかったが、
この比較例2の場合は、ゲル状ポリマー電解質の支持体
の微孔性ポリプロピレンフィルムのイオン伝導性が充分
でなく、大電流を流すことができないため、過充電状態
になる前から内部抵抗が大きく、そのため、発熱も少な
く、発火に至らなかっただけに過ぎない。なお、比較例
1のうち発火に至らなかったもの(ただし、発熱あり)
について内部抵抗をはかったところ、内部抵抗が小さ
く、そのように過充電時に内部抵抗が小さかったこと
が、過充電によって発熱や発火に至る原因になったもの
と考えられる。また、実施例1〜3の微気泡全面に発生
とは、電極間に介在するゲル状ポリマー電解質層または
電極の表面で電極とゲル状ポリマー電解質層とが接触し
ている面全体に微気泡が発生していることを意味してい
る。
As shown in Table 1, in Examples 1 to 3, microbubbles were generated on the entire surface of the battery during overcharging, the internal resistance was increased, the flow of current was hindered, and there was no ignition. Was. Also, Comparative Example 2 did not ignite,
In the case of Comparative Example 2, the ionic conductivity of the microporous polypropylene film as the support of the gel polymer electrolyte was insufficient, and a large current could not be passed. Therefore, the heat generated was small, and the fire did not occur. In Comparative Example 1, no ignition occurred (however, heat was generated)
When the internal resistance was measured, it was considered that the internal resistance was low and the internal resistance was low during overcharging, which caused overheating and ignition. Further, the generation of microbubbles over the entire surface of Examples 1 to 3 means that microbubbles are present on the entire surface of the gel polymer electrolyte layer interposed between the electrodes or on the surface of the electrode where the electrode and the gel polymer electrolyte layer are in contact. It means that it has occurred.

【0026】上記実施例では1個のユニットセルを外装
して電池に仕上げた場合について示したが、それに代え
て複数個のユニットセルを積層したユニットセル積層体
を外装して電池に仕上げてもよい。
In the above embodiment, the case where one unit cell is packaged to finish the battery is shown. Alternatively, a unit cell laminate in which a plurality of unit cells are stacked may be packaged to finish the battery. Good.

【0027】なお、ポリマー電解質のゲル化に際して
は、実施例で示した以外に、たとえば、ラジカル重合型
の不飽和ポリエステル、または、ラジカル重合型のアク
リル系エポキシアクリレート、ウレタンアクリレート、
ポリエステルアクリレート、アルキッドアクリレート、
シリコンアクリレートなどの光硬化性樹脂を紫外線ある
いは電子線を用いてゲル化させるものであってもよい。
In the gelation of the polymer electrolyte, in addition to those shown in the examples, for example, radical polymerizable unsaturated polyester, or radical polymerizable acrylic epoxy acrylate, urethane acrylate,
Polyester acrylate, alkyd acrylate,
A photocurable resin such as silicon acrylate may be gelled using ultraviolet light or an electron beam.

【0028】[0028]

【発明の効果】以上説明したように、本発明では、過充
電時や短絡時などにおいても安全性の高いポリマー電解
質電池を提供することができた。
As described above, according to the present invention, a polymer electrolyte battery having high safety even during overcharge or short circuit can be provided.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明に係るポリマー電解質電池の一例を模式
的に示す断面図である。
FIG. 1 is a cross-sectional view schematically showing one example of a polymer electrolyte battery according to the present invention.

【符号の説明】[Explanation of symbols]

1 正極 2 負極 3 ポリマー電解質層 4 外装体 DESCRIPTION OF SYMBOLS 1 Positive electrode 2 Negative electrode 3 Polymer electrolyte layer 4 Package

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 シート状の正極、シート状の負極および
シート状のポリマー電解質層を有するポリマー電解質電
池において、ポリマー電解質層中または上記正極、負極
のうち少なくとも一方の電極中または少なくとも一方の
電極とポリマー電解質層との界面に、高温または高電圧
にさらされることによって気体を発生し、ポリマー電解
質層の内部または電極の内部またはポリマー電解質層と
電極との界面にイオン伝導を妨げる妨害体を形成する物
質を含有することを特徴とするポリマー電解質電池。
1. A polymer electrolyte battery comprising a sheet-shaped positive electrode, a sheet-shaped negative electrode and a sheet-shaped polymer electrolyte layer, wherein the polymer electrolyte layer or at least one of the positive electrode and the negative electrode has at least one electrode. At the interface with the polymer electrolyte layer, a gas is generated by being exposed to high temperature or high voltage, and forms an obstacle that prevents ion conduction inside the polymer electrolyte layer or inside the electrode or at the interface between the polymer electrolyte layer and the electrode. A polymer electrolyte battery comprising a substance.
【請求項2】 ポリマー電解質層がゲル状ポリマー電解
質層である請求項1記載のポリマー電解質電池。
2. The polymer electrolyte battery according to claim 1, wherein the polymer electrolyte layer is a gel polymer electrolyte layer.
【請求項3】 気体を発生させるための物質が炭酸リチ
ウムまたは蓚酸リチウムである請求項1記載のポリマー
電解質電池。
3. The polymer electrolyte battery according to claim 1, wherein the substance for generating a gas is lithium carbonate or lithium oxalate.
JP10073241A 1998-03-06 1998-03-06 Polymer electrolyte battery Withdrawn JPH11260346A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10073241A JPH11260346A (en) 1998-03-06 1998-03-06 Polymer electrolyte battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10073241A JPH11260346A (en) 1998-03-06 1998-03-06 Polymer electrolyte battery

Publications (1)

Publication Number Publication Date
JPH11260346A true JPH11260346A (en) 1999-09-24

Family

ID=13512498

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10073241A Withdrawn JPH11260346A (en) 1998-03-06 1998-03-06 Polymer electrolyte battery

Country Status (1)

Country Link
JP (1) JPH11260346A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001297764A (en) * 2000-04-04 2001-10-26 Sony Corp Positive electrode activator and nonaqueous electrolyte secondary cell
JP2005332650A (en) * 2004-05-19 2005-12-02 Matsushita Electric Ind Co Ltd Nonaqueous electrolyte lithium secondary battery
JP2010199035A (en) * 2009-02-27 2010-09-09 Sanyo Electric Co Ltd Nonaqueous electrolyte secondary battery
WO2011157958A1 (en) * 2010-06-17 2011-12-22 Centre National De La Recherche Scientifique Method for producing a lithium or sodium battery
US11811018B2 (en) * 2017-07-28 2023-11-07 Lg Energy Solution, Ltd. Cathode for lithium-sulfur battery, and lithium-sulfur battery comprising same

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001297764A (en) * 2000-04-04 2001-10-26 Sony Corp Positive electrode activator and nonaqueous electrolyte secondary cell
JP2005332650A (en) * 2004-05-19 2005-12-02 Matsushita Electric Ind Co Ltd Nonaqueous electrolyte lithium secondary battery
JP4608943B2 (en) * 2004-05-19 2011-01-12 パナソニック株式会社 Nonaqueous electrolyte lithium secondary battery
JP2010199035A (en) * 2009-02-27 2010-09-09 Sanyo Electric Co Ltd Nonaqueous electrolyte secondary battery
WO2011157958A1 (en) * 2010-06-17 2011-12-22 Centre National De La Recherche Scientifique Method for producing a lithium or sodium battery
FR2961634A1 (en) * 2010-06-17 2011-12-23 Centre Nat Rech Scient PROCESS FOR THE PRODUCTION OF A LITHIUM OR SODIUM BATTERY
US11811018B2 (en) * 2017-07-28 2023-11-07 Lg Energy Solution, Ltd. Cathode for lithium-sulfur battery, and lithium-sulfur battery comprising same

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