JP7030250B2 - 全固体電池 - Google Patents
全固体電池 Download PDFInfo
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- JP7030250B2 JP7030250B2 JP2021540742A JP2021540742A JP7030250B2 JP 7030250 B2 JP7030250 B2 JP 7030250B2 JP 2021540742 A JP2021540742 A JP 2021540742A JP 2021540742 A JP2021540742 A JP 2021540742A JP 7030250 B2 JP7030250 B2 JP 7030250B2
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- 239000007787 solid Substances 0.000 title 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 85
- 229910002804 graphite Inorganic materials 0.000 claims description 79
- 239000010439 graphite Substances 0.000 claims description 79
- 238000010248 power generation Methods 0.000 claims description 53
- 238000007789 sealing Methods 0.000 claims description 49
- 239000007774 positive electrode material Substances 0.000 claims description 27
- 239000007773 negative electrode material Substances 0.000 claims description 21
- 239000007784 solid electrolyte Substances 0.000 claims description 20
- 238000003825 pressing Methods 0.000 claims description 14
- 230000000052 comparative effect Effects 0.000 description 10
- 239000000203 mixture Substances 0.000 description 10
- 238000000465 moulding Methods 0.000 description 8
- 239000002203 sulfidic glass Substances 0.000 description 7
- 230000014759 maintenance of location Effects 0.000 description 6
- 239000002253 acid Substances 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 4
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 229910052744 lithium Inorganic materials 0.000 description 4
- 239000011255 nonaqueous electrolyte Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000002041 carbon nanotube Substances 0.000 description 3
- 229910021393 carbon nanotube Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- 229910011328 LiNi0.6Co0.2Mn0.2O2 Inorganic materials 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000012752 auxiliary agent Substances 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004745 nonwoven fabric Substances 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 241000280258 Dyschoriste linearis Species 0.000 description 1
- 229910000733 Li alloy Inorganic materials 0.000 description 1
- 239000004734 Polyphenylene sulfide Substances 0.000 description 1
- SOXUFMZTHZXOGC-UHFFFAOYSA-N [Li].[Mn].[Co].[Ni] Chemical compound [Li].[Mn].[Co].[Ni] SOXUFMZTHZXOGC-UHFFFAOYSA-N 0.000 description 1
- 238000010306 acid treatment Methods 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 239000002134 carbon nanofiber Substances 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 150000004678 hydrides Chemical class 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000001989 lithium alloy Substances 0.000 description 1
- 229910000625 lithium cobalt oxide Inorganic materials 0.000 description 1
- BFZPBUKRYWOWDV-UHFFFAOYSA-N lithium;oxido(oxo)cobalt Chemical compound [Li+].[O-][Co]=O BFZPBUKRYWOWDV-UHFFFAOYSA-N 0.000 description 1
- URIIGZKXFBNRAU-UHFFFAOYSA-N lithium;oxonickel Chemical compound [Li].[Ni]=O URIIGZKXFBNRAU-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910021382 natural graphite Inorganic materials 0.000 description 1
- 229910000484 niobium oxide Inorganic materials 0.000 description 1
- URLJKFSTXLNXLG-UHFFFAOYSA-N niobium(5+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Nb+5].[Nb+5] URLJKFSTXLNXLG-UHFFFAOYSA-N 0.000 description 1
- 239000010450 olivine Substances 0.000 description 1
- 229910052609 olivine Inorganic materials 0.000 description 1
- 229920000069 polyphenylene sulfide Polymers 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
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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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/152—Lids or covers characterised by their shape for cells having curved cross-section, e.g. round or elliptic
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- H—ELECTRICITY
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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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
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- H—ELECTRICITY
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- 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
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- 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
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- H—ELECTRICITY
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- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
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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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/109—Primary casings; Jackets or wrappings characterised by their shape or physical structure of button or coin shape
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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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/153—Lids or covers characterised by their shape for button or coin cells
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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
- H01M50/10—Primary casings; Jackets or wrappings
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- H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
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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
- H01M50/10—Primary casings; Jackets or wrappings
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- H01M50/171—Lids or covers characterised by the methods of assembling casings with lids using adhesives or sealing agents
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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
- H01M50/531—Electrode connections inside a battery casing
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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
- H01M10/052—Li-accumulators
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- 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
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- H01M2300/00—Electrolytes
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- H01M2300/0065—Solid electrolytes
- H01M2300/0068—Solid electrolytes inorganic
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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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- Condensed Matter Physics & Semiconductors (AREA)
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- Sealing Battery Cases Or Jackets (AREA)
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Description
(t3-t2)/(t1-t2)×100(%)
復元率は、日本産業規格JIS R3453 2001(ジョイントシート)に記載された方法で測定することができる。
以下、導電性シートとして黒鉛シートを用いた本開示の実施形態1について、図1を用いて具体的に説明する。まず、図1に示すように、全固体電池1は、基本的には、外装缶2と、封口缶3と、発電要素4と、外装缶2と発電要素4との間に配置された黒鉛シート5と、封口缶3と発電要素4との間に配置された黒鉛シート5とから構成されている。なお、本実施形態では、全固体電池1は、扁平形電池である。また、導電性シートは、導電性テープであってもよい。
図4に示すように、外装缶2の底部21の内面にのみ凹凸構造を設け、封口缶3の平面部31の内面を平面に形成してもよい。或いは、図示はしないが、封口缶3の平面部31の内面にのみ凹凸構造を設け、外装缶2の底部21の内面を平面に形成してもよい。この場合でも、上述した効果を得ることができる。なお、図4では、凹凸構造を設けていない封口缶3の内面に隣接して黒鉛シート5を配置しているが、黒鉛シート5を取り除いて封口缶3の平面部31の内面に発電要素4を直接接触させてもよい。この場合にも、黒鉛シート5が発電要素4を押圧することにより、封口缶3の平面部31の内面と発電要素4との導通を良好に維持することができる。
<正極材の作製>
平均粒子径3μmのLiNi0.6Co0.2Mn0.2O2と、硫化物固体電解質(Li6PS5Cl)と、導電助剤であるカーボンナノチューブ〔昭和電工社製「VGCF」(商品名)〕とを質量比で55:40:5の割合で混合し、よく混練して正極合剤を調製した。次に、正極合剤:90mgを直径10mmの粉末成形金型に入れ、プレス機を用いて10トン/cm2の条件で加圧成形を行い、正極合剤成形体よりなる正極材41を作製した。
次に、粉末成形金型内の正極材41の上に、硫化物固体電解質(Li6PS5Cl):45mgを投入し、プレス機を用いて加圧成形を行い、正極材41の上に固体電解質43を形成した。
平均粒子径35μmのチタン酸リチウムと、硫化物固体電解質(Li6PS5Cl)と、導電助剤である黒鉛粉末とを質量比で55:40:5の割合で混合し、よく混練して負極合剤を調製した。次に、負極合剤:150mgを粉末成形金型内の固体電解質43の上に投入し、プレス機を用いて加圧成形を行い、固体電解質43の上に負極合剤成形体よりなる負極材42を形成した。このようにして、正極材41、固体電解質43及び負極材42が積層された発電要素4を作製した。
発電要素4を収容する金属容器として、ステンレス鋼製の外装缶2及び封口缶3を用意した。図1~3に示すように、外装缶2の底部21の内面と封口缶3の平面部31の内面には、それぞれ凹凸構造(凹部23、33及び凸部24、34)をローレット加工により形成した。
比較例1の全固体電池は、基本的な構成が実施例の全固体電池1と同様であって、黒鉛シート5に代えて炭素繊維製の不織布を集電体として用いた点で異なる。炭素繊維製の不織布の厚みは、0.2mmであり、復元率は4%である。
比較例2の全固体電池は、基本的な構成が実施例の全固体電池1と同様であって、外装缶の底部の内面と封口缶の平面部の内面とにローレット加工による凹凸構造を有していない点で異なる。
実施例の全固体電池1、比較例1の全固体電池及び比較例2の全固体電池を用い、それぞれ以下の条件で容量維持率を算出し、比較した。
2 外装缶、21 底部、22 筒状側壁部、23 凹部、24 凸部
3 封口缶、31 平面部、32 周壁部、33 凹部、34 凸部
4 発電要素、41 正極材、42 負極材、43 固体電解質
5 黒鉛シート(導電性シート)
6 ガスケット
Claims (4)
- 底部を有する外装缶と、
平面部を有し、前記外装缶に対向する封口缶と、
前記外装缶と前記封口缶との間に収容され、正極材と負極材と前記正極材と前記負極材との間に配置される固体電解質とを含む発電要素とを備え、
前記外装缶の底部の内面及び前記封口缶の平面部の内面の少なくとも一方は、凹凸構造を有し、
前記凹凸構造を有する少なくとも一方の内面と前記発電要素との間に、押圧に対し復元性を有する導電性シートを含み、
前記導電性シートの押圧に対する復元率は、7%以上である、全固体電池。 - 請求項1に記載の全固体電池であって、
前記導電性シートは、黒鉛シートである、全固体電池。 - 請求項2に記載の全固体電池であって、
前記黒鉛シートは、0.3~1.5g/cm3のみかけ密度を有する、全固体電池。 - 請求項1に記載の全固体電池であって、
前記導電性シートは、0.05~0.5mmの厚みを有する、全固体電池。
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JP2019150411 | 2019-08-20 | ||
JP2019150411 | 2019-08-20 | ||
PCT/JP2020/030619 WO2021033601A1 (ja) | 2019-08-20 | 2020-08-11 | 全固体電池 |
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JPWO2021033601A1 JPWO2021033601A1 (ja) | 2021-02-25 |
JP7030250B2 true JP7030250B2 (ja) | 2022-03-04 |
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US (1) | US20220320645A1 (ja) |
EP (1) | EP3996174A4 (ja) |
JP (1) | JP7030250B2 (ja) |
CN (1) | CN114207917B (ja) |
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US20210328292A1 (en) * | 2018-09-26 | 2021-10-21 | Maxell Holdings, Ltd. | Flat-shaped all-solid battery and method for manufacturing same |
WO2022113989A1 (ja) * | 2020-11-25 | 2022-06-02 | マクセル株式会社 | ケース付き全固体電池 |
KR20230120926A (ko) * | 2022-02-10 | 2023-08-17 | 삼성에스디아이 주식회사 | 전고체 전지용 탄성 시트 조성물, 이로부터 제조된 전고체 전지용 탄성시트, 및 이를 포함하는 전고체 전지 |
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JP5813461B2 (ja) | 2011-10-31 | 2015-11-17 | 株式会社ミヤデン | 軸状ワークの焼入装置 |
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US3850857A (en) | 1973-08-20 | 1974-11-26 | Goodrich Co B F | Process for the polymerization of epihalohydrin employing a trialkyl oxonium salt of an hmf6 acid as catalyst |
JPS5813461U (ja) * | 1981-07-20 | 1983-01-27 | 三洋電機株式会社 | ヒ−トポンプ式空気調和機 |
JPS59119563U (ja) * | 1983-01-31 | 1984-08-11 | 日本電気ホームエレクトロニクス株式会社 | 電池 |
JPH0426050A (ja) * | 1990-05-18 | 1992-01-29 | Matsushita Electric Ind Co Ltd | リチウム電池 |
JPH08115710A (ja) * | 1994-10-14 | 1996-05-07 | Hitachi Maxell Ltd | 扁平形電池 |
US6413486B2 (en) * | 1998-06-05 | 2002-07-02 | Matsushita Electric Industrial Co., Ltd. | Nonaqueous secondary battery, constituent elements of battery, and materials thereof |
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