JPWO2018060773A1 - 二次電池 - Google Patents
二次電池 Download PDFInfo
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- 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
-
- 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
- H01M10/052—Li-accumulators
-
- 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
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
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- H—ELECTRICITY
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- 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
- H01M10/058—Construction or manufacture
- H01M10/0583—Construction or manufacture of accumulators with folded construction elements except wound ones, i.e. folded positive or negative electrodes or separators, e.g. with "Z"-shaped electrodes or separators
-
- 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
- H01M10/058—Construction or manufacture
- H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
-
- 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
- H01M4/131—Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
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- 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
- H01M4/134—Electrodes based on metals, Si or alloys
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- 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
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- 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
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/483—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides for non-aqueous cells
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- H—ELECTRICITY
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- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
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- 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
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- 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
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- 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
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Abstract
Description
図2および図3を参照して、発電要素110は、セパレータ30を挟んで後述する正極活物質層12と負極活物質層22とが対向した状態で、正極板10と負極板20とを積層してなる。
電解液の種類は特に限定されず、従来公知のものを適宜利用することができる。本実施形態では、電解液として、液体電解質を用いたものを使用するが、ゲル電解質を用いた電解液を使用してもよい。
外装部材120は、発電要素110を電解液とともに収容する。
正極板10は、第1集電体11の両面11a、11b上に正極活物質層12を配置してなる。
負極板20は、第2集電体21の両面21a、21b上に負極活物質層22を配置してなる。
セパレータ30は、電解液に含まれる電解質を保持する。
正極板10とセパレータ30とは、第1接着層40を介して接着されており、負極板20とセパレータ30とは、第2接着層45を介して接着されている。
図3および図4を参照して、負極板20は、セパレータ30を挟んで正極活物質層12に対向している対向部20aと、対向部20aの外周に位置し、セパレータ30を挟んで正極活物質層12に対向していない非対向部20bと、を備える。
本実施形態に係る二次電池100は、燃料電池車およびハイブリッド電気自動車等の車両のモータ等の駆動用電源や補助電源として充放電が繰り返しなされる。充放電によって、負極活物質層22に含まれる負極活物質の体積が変化して負極活物質層22が膨張収縮する。
本実施形態に係る二次電池100は、第1集電体11の両面11a、11b上に正極活物質層12を配置してなる正極板10と、負極活物質層22を、正極活物質層12の面積よりも大きな面積をもって、第2集電体21の両面21a、21b上に配置してなる負極板20とを、電解質を保持するセパレータ30を挟んで、正極活物質層12と負極活物質層22とが対向した状態で積層してなる発電要素110を有する。負極板20は、セパレータ30を挟んで正極活物質層12に対向している対向部20aと、対向部20aの外周に位置し、セパレータ30を挟んで正極活物質層12に対向していない非対向部20bと、を備える。負極板20とセパレータ30とは、第2接着層45を介して接着されており、第2接着層45において、セパレータ30に対向部20aを接着する第1接着部45aの接着強度よりも、セパレータ30に非対向部20bを接着する第2接着部45bの接着強度の方が大きい。
上述した実施形態では、第1接着部45aを構成する材料よりも第2接着部45bを構成する材料の平均粒径を小さくすることにより、第1接着部45aの接着強度よりも第2接着部45bの接着強度を大きくした。しかしながら、第2接着部45bの接着強度を第2接着部45bの接着強度よりも大きくする方法は特に限定されない。
また、第2接着部45bは、非イオン透過性を備えてもよい。
また、上述した実施形態並びに改変例1および改変例2では、第1接着部45aを構成する材料と第2接着部45bを構成する材料とは同じだった。しかしながら、第1接着部45aを構成する材料と第2接着部45bを構成する材料とは異なっていてもよい。
さらに、上述した実施形態および改変例では、第1集電体11の両面11a、11bに正極活物質層12が配置されるとともに、第2集電体21の両面21a、21bに負極活物質層22が配置された、いわゆる非双曲型の二次電池を例に説明した。
11 第1集電体、
11a、21a 面(一方の面)、
11b、21b 面、
12 正極活物質層、
20 負極板、
20a 対向部、
20b 非対向部、
21 第2集電体、
22 負極活物質層、
30 セパレータ、
40 第1接着層、
45 第2接着層(接着層)、
45a 第1接着部、
45b 第2接着部、
100 二次電池、
110 発電要素、
120 外装部材、
M 剥離紙。
Claims (6)
- 第1集電体の少なくとも一方の面上に正極活物質層を配置してなる正極板と、負極活物質層を、前記正極活物質層の面積よりも大きな面積をもって、第2集電体の少なくとも一方の面上に配置してなる負極板とを、電解質を保持するセパレータを挟んで、前記正極活物質層と前記負極活物質層とが対向した状態で積層してなる発電要素を有し、
前記負極板は、前記セパレータを挟んで前記正極活物質層に対向している対向部と、前記対向部の外周に位置し、前記セパレータを挟んで前記正極活物質層に対向していない非対向部と、を備え、
前記負極板と前記セパレータとは、接着層を介して接着されており、
前記接着層において、前記セパレータに前記対向部を接着する第1接着部の接着強度よりも、前記セパレータに前記非対向部を接着する第2接着部の接着強度の方が大きい、二次電池。 - 前記第2接着部を構成する材料の平均粒径は、前記第1接着部を構成する材料の平均粒径よりも小さい、請求項1に記載の二次電池。
- 前記第2接着部を構成する材料の目付量は、前記第1接着部を構成する材料の目付量よりも大きい、請求項1または請求項2に記載の二次電池。
- 前記第1接着部を構成する材料と前記第2接着部を構成する材料とは異なる、請求項1〜3のいずれか1項に記載の二次電池。
- 前記第2接着部は、非イオン透過性を備える、請求項4に記載の二次電池。
- リチウムイオン二次電池であり、
前記負極活物質層に含まれる負極活物質の少なくとも1種は、シリコン、シリコン合金およびシリコン酸化物からなる群から選択される、請求項1〜5のいずれか1項に記載の二次電池。
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CN112534616A (zh) * | 2018-09-12 | 2021-03-19 | 日本瑞翁株式会社 | 二次电池用层叠体及二次电池以及其制造方法 |
US12062810B2 (en) | 2018-09-28 | 2024-08-13 | Zeon Corporation | Secondary battery and method of producing same |
CN111146396B (zh) * | 2019-12-30 | 2022-11-04 | 宁德新能源科技有限公司 | 电化学装置及包含所述电化学装置的电子装置 |
KR20210135861A (ko) * | 2020-05-06 | 2021-11-16 | 주식회사 엘지에너지솔루션 | 저항이 개선된 이차전지 제조방법 |
JP7186747B2 (ja) | 2020-07-27 | 2022-12-09 | プライムプラネットエナジー&ソリューションズ株式会社 | 二次電池およびその製造方法 |
JP7158449B2 (ja) * | 2020-10-09 | 2022-10-21 | プライムプラネットエナジー&ソリューションズ株式会社 | 非水電解液二次電池 |
JP7245212B2 (ja) * | 2020-10-09 | 2023-03-23 | プライムプラネットエナジー&ソリューションズ株式会社 | 非水電解液二次電池 |
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