JP7045291B2 - 全固体電池の製造方法 - Google Patents
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- 238000004519 manufacturing process Methods 0.000 title claims description 19
- 239000007784 solid electrolyte Substances 0.000 claims description 59
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 42
- 239000001301 oxygen Substances 0.000 claims description 42
- 229910052760 oxygen Inorganic materials 0.000 claims description 42
- 238000010304 firing Methods 0.000 claims description 39
- 230000036961 partial effect Effects 0.000 claims description 39
- 229910019142 PO4 Inorganic materials 0.000 claims description 37
- 239000010452 phosphate Substances 0.000 claims description 34
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 33
- 229910052799 carbon Inorganic materials 0.000 claims description 33
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 33
- 238000000034 method Methods 0.000 claims description 30
- 239000000463 material Substances 0.000 claims description 19
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 10
- 238000000576 coating method Methods 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 8
- 239000011261 inert gas Substances 0.000 claims description 7
- 239000002228 NASICON Substances 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 3
- 235000021317 phosphate Nutrition 0.000 description 33
- KDLHZDBZIXYQEI-UHFFFAOYSA-N palladium Substances [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 23
- 239000007772 electrode material Substances 0.000 description 15
- 229910052723 transition metal Inorganic materials 0.000 description 15
- 150000003624 transition metals Chemical class 0.000 description 15
- 239000011230 binding agent Substances 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 9
- 239000013078 crystal Substances 0.000 description 9
- 239000012752 auxiliary agent Substances 0.000 description 8
- 230000008034 disappearance Effects 0.000 description 8
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- 238000002844 melting Methods 0.000 description 7
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- 239000007789 gas Substances 0.000 description 6
- 239000000843 powder Substances 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 239000003792 electrolyte Substances 0.000 description 5
- 229910052744 lithium Inorganic materials 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 239000007773 negative electrode material Substances 0.000 description 5
- 239000002002 slurry Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
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- 239000004020 conductor Substances 0.000 description 3
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- 238000010030 laminating Methods 0.000 description 2
- SWAIALBIBWIKKQ-UHFFFAOYSA-N lithium titanium Chemical compound [Li].[Ti] SWAIALBIBWIKKQ-UHFFFAOYSA-N 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229910052763 palladium Inorganic materials 0.000 description 2
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 2
- 239000007774 positive electrode material Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000007650 screen-printing Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 229910018119 Li 3 PO 4 Inorganic materials 0.000 description 1
- 229910011281 LiCoPO 4 Inorganic materials 0.000 description 1
- 229910012465 LiTi Inorganic materials 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- YWJVFBOUPMWANA-UHFFFAOYSA-H [Li+].[V+5].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O Chemical compound [Li+].[V+5].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O YWJVFBOUPMWANA-UHFFFAOYSA-H 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
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- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000003125 aqueous solvent Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 239000002612 dispersion medium Substances 0.000 description 1
- 238000007606 doctor blade method Methods 0.000 description 1
- 238000009837 dry grinding Methods 0.000 description 1
- 238000000921 elemental analysis Methods 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- 229910052735 hafnium Inorganic materials 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000007641 inkjet printing Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- 238000007644 letterpress printing Methods 0.000 description 1
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 description 1
- 229910052808 lithium carbonate Inorganic materials 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 230000010534 mechanism of action Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 125000002467 phosphate group Chemical group [H]OP(=O)(O[H])O[*] 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000010405 reoxidation reaction Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000000790 scattering method Methods 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000010532 solid phase synthesis reaction Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000002411 thermogravimetry Methods 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 238000001238 wet grinding Methods 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0561—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of inorganic materials only
- H01M10/0562—Solid materials
-
- 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
- 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
- H01M4/04—Processes of manufacture in general
- H01M4/0402—Methods of deposition of the material
- H01M4/0404—Methods of deposition of the material by coating on electrode collectors
-
- 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
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/661—Metal or alloys, e.g. alloy coatings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/0065—Solid electrolytes
- H01M2300/0068—Solid electrolytes inorganic
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Inorganic Chemistry (AREA)
- Secondary Cells (AREA)
- Carbon And Carbon Compounds (AREA)
- Cell Electrode Carriers And Collectors (AREA)
- Battery Electrode And Active Subsutance (AREA)
Description
まず、上述の固体電解質層30を構成するリン酸塩系固体電解質の粉末を作製する。例えば、原料、添加物などを混合し、固相合成法などを用いることで、固体電解質層30を構成するリン酸塩系固体電解質の粉末を作製することができる。得られた粉末を乾式粉砕することで、所望の粒子径に調整することができる。例えば、5mmφのZrO2ボールを用いた遊星ボールミルで、所望の粒子径に調整する。
次に、上述の第1電極層11および第2電極層21の作製用の電極層用ペーストを作製する。例えば、導電助剤、活物質、固体電解質材料、バインダ、可塑剤などを水あるいは有機溶剤に均一分散させることで電極層用ペーストを得ることができる。固体電解質材料として、上述した固体電解質ペーストを用いてもよい。導電助剤として、各種カーボン材料を用いる。第1電極層11と第2電極層21とで組成が異なる場合には、それぞれの電極層用ペーストを個別に作製すればよい。
次に、上述の第1集電体層12および第2集電体層22の作製用の集電体用ペーストを作製する。例えば、Pdの粉末、バインダ、分散剤、可塑剤などを水あるいは有機溶剤に均一分散させることで、集電体用ペーストを得ることができる。
図1で説明した全固体電池100については、電極層用ペーストおよび集電体用ペーストをグリーンシートの両面に印刷する。印刷の方法は、特に限定されるものではなく、スクリーン印刷法、凹版印刷法、凸版印刷法、カレンダロール法などを用いることができる。薄層かつ高積層の積層デバイスを作製するにはスクリーン印刷がもっとも一般的と考えられる一方、ごく微細な電極パターンや特殊形状が必要な場合はインクジェット印刷を適用する方が好ましい場合もある。
次に、得られた積層体を焼成する。本実施形態においては、電極層用ペーストに含まれるカーボンの消失を抑制する観点から、焼成雰囲気の酸素分圧に上限を設ける。具体的には、焼成雰囲気の酸素分圧を2×10-13atm以下とする。一方、リン酸塩系固体電解質の融解を抑制する観点から、焼成雰囲気の酸素分圧に下限を設ける。具体的には、焼成雰囲気の酸素分圧を5×10-22atm以上とする。このように酸素分圧の範囲を定めることで、カーボンの消失およびリン酸塩系固体電解質の融解を抑制することができる。焼成雰囲気の酸素分圧の調整手法は、特に限定されるものではない。
所定の粒子径を有するリン酸塩系固体電解質を分散媒中で分散させて固体電解質スラリを作製した。得られた個体電解質スラリにバインダを添加することで、固体電解質ペーストを作製した。固体電解質ペーストを塗工することで、グリーンシートを作製した。次に、例えば湿式ビーズミルにて電極活物質、固体電解質、カーボンブラックを秤量し、溶剤、バインダとともにスラリ状に混練しシートに塗工したものを作製し、これをカーボン入り電極シートとした。次に、Pd粉末をシート状に塗工し、集電シートを作製した。グリーンシートを複数枚重ね合わせて形成した固体電解質層の上下にカーボン入り電極シートおよび集電シートを重ね貼り付け円板型に打ち抜いたものを試料とした。
11 第1電極層
12 第1集電体層
20 第2電極
21 第2電極層
22 第2集電体層
30 固体電解質層
40a 第1外部電極
40b 第2外部電極
51 グリーンシート
52 電極層用ペースト
53 集電体用ペースト
54 逆パターン
60 積層チップ
100 全固体電池
Claims (4)
- Pdを含む集電体用ペースト塗布物上に、カーボンを含む電極層用ペースト塗布物、リン酸塩系の固体電解質の粒子を含むグリーンシート、カーボンを含む電極層用ペースト塗布物、Pdを含む集電体用ペースト塗布物がこの順に積層された構造体を用意する工程と、
5×10-22atm以上2×10-13atm以下の酸素分圧範囲で前記構造体を焼成する工程と、を含むことを特徴とする全固体電池の製造方法。 - 水素ガスおよび不活性ガスの混合比率を調整することで、前記酸素分圧範囲を実現することを特徴とする請求項1記載の全固体電池の製造方法。
- 前記不活性ガスは、窒素ガスであることを特徴とする請求項2記載の全固体電池の製造方法。
- 前記リン酸塩系の固体電解質は、NASICON構造を有することを特徴とする請求項1~3のいずれか一項に記載の全固体電池の製造方法。
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018169749A JP7045291B2 (ja) | 2018-09-11 | 2018-09-11 | 全固体電池の製造方法 |
| US16/560,285 US20200083567A1 (en) | 2018-09-11 | 2019-09-04 | Manufacturing method of all solid battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018169749A JP7045291B2 (ja) | 2018-09-11 | 2018-09-11 | 全固体電池の製造方法 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2020042983A JP2020042983A (ja) | 2020-03-19 |
| JP7045291B2 true JP7045291B2 (ja) | 2022-03-31 |
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| JP2018169749A Active JP7045291B2 (ja) | 2018-09-11 | 2018-09-11 | 全固体電池の製造方法 |
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| Country | Link |
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| US (1) | US20200083567A1 (ja) |
| JP (1) | JP7045291B2 (ja) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12451515B2 (en) * | 2019-11-12 | 2025-10-21 | Tdk Corporation | Solid electrolyte layer and all-solid-state battery using same |
| DE102020114893A1 (de) | 2020-06-04 | 2021-12-09 | Tdk Electronics Ag | Elektrochemische Zelle und elektrochemisches System |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008198492A (ja) | 2007-02-13 | 2008-08-28 | Namics Corp | 全固体二次電池 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5484928B2 (ja) * | 2010-01-19 | 2014-05-07 | 株式会社オハラ | 全固体電池 |
| US8877388B1 (en) * | 2010-01-20 | 2014-11-04 | Sandia Corporation | Solid-state lithium battery |
| JP6605917B2 (ja) * | 2015-10-29 | 2019-11-13 | 太陽誘電株式会社 | 全固体二次電池 |
-
2018
- 2018-09-11 JP JP2018169749A patent/JP7045291B2/ja active Active
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2019
- 2019-09-04 US US16/560,285 patent/US20200083567A1/en not_active Abandoned
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008198492A (ja) | 2007-02-13 | 2008-08-28 | Namics Corp | 全固体二次電池 |
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| Publication number | Publication date |
|---|---|
| US20200083567A1 (en) | 2020-03-12 |
| JP2020042983A (ja) | 2020-03-19 |
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