JP2022077641A - 固体電池用電極 - Google Patents
固体電池用電極 Download PDFInfo
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- -1 but for example Inorganic materials 0.000 description 3
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- 229910000733 Li alloy Inorganic materials 0.000 description 1
- 229910004493 Li(Ni1/3Co1/3Mn1/3)O2 Inorganic materials 0.000 description 1
- 229910012820 LiCoO Inorganic materials 0.000 description 1
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- 229910010707 LiFePO 4 Inorganic materials 0.000 description 1
- 229910015643 LiMn 2 O 4 Inorganic materials 0.000 description 1
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- 239000001989 lithium alloy Substances 0.000 description 1
- GLNWILHOFOBOFD-UHFFFAOYSA-N lithium sulfide Chemical compound [Li+].[Li+].[S-2] GLNWILHOFOBOFD-UHFFFAOYSA-N 0.000 description 1
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- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/658—Means for temperature control structurally associated with the cells by thermal insulation or shielding
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- H01M4/64—Carriers or collectors
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- H01M4/745—Expanded metal
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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- H01M50/50—Current conducting connections for cells or batteries
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- H01M50/574—Devices or arrangements for the interruption of current
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- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
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Abstract
Description
<固体電池>
本実施形態に係る固体電池1は、図1に示すように、正極10及び負極30と、正極10と負極30との間に配置される固体電解質20とを積層した積層体を有する。上記積層体を正極10及び負極30の外側から挟み込んで押圧することで、固体電池1が得られる。
本実施形態に係る固体電池用電極である、正極10及び負極30は、金属多孔体である集電体と、集電体に充填される電極合材と、を有する。以下の説明において、正極10を例に挙げて説明するが、負極30についても同様の構成が適用できる。
正極10及び負極30を構成する集電体は、金属多孔体により構成される。金属多孔体は、互いに連続した孔部を有し、孔部の内部に電極活物質を含む電極合材を充填できる。上記金属多孔体としては、互いに連続した孔部を有するものであれば特に制限されず、例えば発泡による孔部を有する発泡金属、金属メッシュ、エキスパンドメタル、パンチングメタル、金属不織布等の形態が挙げられる。金属多孔体に用いられる金属としては、導電性を有するものであれば特に限定されないが、例えば、ニッケル、アルミニウム、ステンレス、チタン、銅、銀等が挙げられる。これらの中では、正極を構成する集電体としては、発泡アルミニウム、発泡ニッケル及び発泡ステンレスが好ましく、負極を構成する集電体としては、発泡銅及び発泡ステンレスを好ましく用いることができる。
集電体の合材充填領域11に充填される電極合材は、電極活物質を少なくとも含む。本実施形態に適用できる電極合剤は、電極活物質を必須成分として含んでいれば、その他の成分を任意で含んでいてもよい。その他の成分としては特に限定されるものではなく、固体電池を作製する際に用い得る成分であればよい。例えば、固体電解質、導電助剤、結着剤等が挙げられる。
固体電解質20は、正極10と、負極30との間に積層され、例えば層状に形成される。固体電解質20は、少なくとも固体電解質材料を含有する層である。上記固体電解質材料を介して、正極活物質及び負極活物質の間の電荷移動を行うことができる。
合材未充填領域12は、集電体の一部に電極合材を充填しないことで形成される。合材未充填領域12は、ヒューズ機能を有するヒューズ機能部を有する。
ヒューズ機能部は、合材未充填領域12の一部において、金属多孔体を構成する金属部の総断面積が合材未充填領域12の他の部分と比較して低い箇所として形成される。上記断面は、端部方向に直交する断面である。上記端部方向とは、電子が流れる方向である、集電タブ形成部13の延出方向である。本実施形態において、合材未充填領域12は、ヒューズ機能部121を有する。図3は、本実施形態に係る正極10の態様を示す上部断面図である。図2及び図3に示すように、ヒューズ機能部121は、例えば、電子が流れる方向である、集電タブ形成部13の延出方向に対して直交する層状に形成される。
図4は、第2実施形態に係る正極10aを示す上面図である。本実施形態において、合材未充填領域12は、ヒューズ機能部122を有する。
10、10a 正極(固体電池用電極)
12 合材未充填領域
121、122 ヒューズ機能部
Claims (3)
- 固体電池用電極であって、
前記固体電池用電極は、金属多孔体である集電体と、前記集電体に充填される電極合材と、を有し、
前記集電体の端部には、前記電極合材が充填されていない合材未充填領域が形成され、
前記合材未充填領域の一部には、端部方向に直交する断面における金属の総断面積が、前記合材未充填領域における他の部分よりも小さい、ヒューズ機能部が設けられる、固体電池用電極。 - 前記ヒューズ機能部は、前記合材未充填領域における他の部分よりも、高い空孔率及び/又は細い金属素線径を有する、請求項1に記載の固体電池用電極。
- 前記ヒューズ機能部の少なくとも一部には、絶縁材、補強材、及び断熱材のうち少なくともいずれかが充填される、請求項1又は2に記載の固体電池用電極。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2020188540A JP7203804B2 (ja) | 2020-11-12 | 2020-11-12 | 固体電池用電極 |
CN202111294431.XA CN114497571A (zh) | 2020-11-12 | 2021-11-03 | 固体电池用电极 |
US17/453,645 US20220149494A1 (en) | 2020-11-12 | 2021-11-04 | Electrode for solid-state battery |
DE102021129080.5A DE102021129080A1 (de) | 2020-11-12 | 2021-11-09 | Elektrode für Feststoffbatterie |
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JP2020188540A JP7203804B2 (ja) | 2020-11-12 | 2020-11-12 | 固体電池用電極 |
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JP2022077641A true JP2022077641A (ja) | 2022-05-24 |
JP7203804B2 JP7203804B2 (ja) | 2023-01-13 |
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US (1) | US20220149494A1 (ja) |
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Citations (8)
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JPH08185850A (ja) * | 1994-12-27 | 1996-07-16 | Sony Corp | リチウムイオン二次電池 |
JPH1167190A (ja) * | 1997-08-27 | 1999-03-09 | Japan Storage Battery Co Ltd | 温度ヒューズ及びそれを備えたリチウム二次電池 |
JP2004311073A (ja) * | 2003-04-02 | 2004-11-04 | Matsushita Electric Ind Co Ltd | 過電流保護機能付きエネルギーデバイス及びその製造方法 |
JP2012186141A (ja) * | 2011-02-18 | 2012-09-27 | Sumitomo Electric Ind Ltd | 電気化学デバイス |
JP2013122910A (ja) * | 2011-12-09 | 2013-06-20 | Samsung Sdi Co Ltd | 2次電池 |
JP2019009015A (ja) * | 2017-06-26 | 2019-01-17 | 三洋電機株式会社 | 角形二次電池 |
JP2019008972A (ja) * | 2017-06-23 | 2019-01-17 | 三洋電機株式会社 | 角形二次電池及びその製造方法 |
JP2020136111A (ja) * | 2019-02-21 | 2020-08-31 | トヨタ自動車株式会社 | バスバー |
Family Cites Families (2)
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JP7184706B2 (ja) | 2019-05-10 | 2022-12-06 | 株式会社日立産機システム | 電力変換装置、それを用いたシステム、およびその診断方法 |
CN110783502B (zh) * | 2019-09-23 | 2022-04-26 | 江苏正力新能电池技术有限公司 | 一种防止电池外短路的结构及顶盖 |
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JPH08185850A (ja) * | 1994-12-27 | 1996-07-16 | Sony Corp | リチウムイオン二次電池 |
JPH1167190A (ja) * | 1997-08-27 | 1999-03-09 | Japan Storage Battery Co Ltd | 温度ヒューズ及びそれを備えたリチウム二次電池 |
JP2004311073A (ja) * | 2003-04-02 | 2004-11-04 | Matsushita Electric Ind Co Ltd | 過電流保護機能付きエネルギーデバイス及びその製造方法 |
JP2012186141A (ja) * | 2011-02-18 | 2012-09-27 | Sumitomo Electric Ind Ltd | 電気化学デバイス |
JP2013122910A (ja) * | 2011-12-09 | 2013-06-20 | Samsung Sdi Co Ltd | 2次電池 |
JP2019008972A (ja) * | 2017-06-23 | 2019-01-17 | 三洋電機株式会社 | 角形二次電池及びその製造方法 |
JP2019009015A (ja) * | 2017-06-26 | 2019-01-17 | 三洋電機株式会社 | 角形二次電池 |
JP2020136111A (ja) * | 2019-02-21 | 2020-08-31 | トヨタ自動車株式会社 | バスバー |
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US20220149494A1 (en) | 2022-05-12 |
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