JP4433783B2 - バイポーラ電池 - Google Patents
バイポーラ電池 Download PDFInfo
- Publication number
- JP4433783B2 JP4433783B2 JP2003419517A JP2003419517A JP4433783B2 JP 4433783 B2 JP4433783 B2 JP 4433783B2 JP 2003419517 A JP2003419517 A JP 2003419517A JP 2003419517 A JP2003419517 A JP 2003419517A JP 4433783 B2 JP4433783 B2 JP 4433783B2
- Authority
- JP
- Japan
- Prior art keywords
- battery
- layer
- insulating layer
- positive electrode
- electrolyte
- 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.)
- Expired - Lifetime
Links
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 29
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- 239000007773 negative electrode material Substances 0.000 description 11
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- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
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- 229910013063 LiBF 4 Inorganic materials 0.000 description 2
- 229910015643 LiMn 2 O 4 Inorganic materials 0.000 description 2
- 229910013385 LiN(SO2C2F5)2 Inorganic materials 0.000 description 2
- 229910013870 LiPF 6 Inorganic materials 0.000 description 2
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- 238000007731 hot pressing Methods 0.000 description 2
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- ACFSQHQYDZIPRL-UHFFFAOYSA-N lithium;bis(1,1,2,2,2-pentafluoroethylsulfonyl)azanide Chemical compound [Li+].FC(F)(F)C(F)(F)S(=O)(=O)[N-]S(=O)(=O)C(F)(F)C(F)(F)F ACFSQHQYDZIPRL-UHFFFAOYSA-N 0.000 description 2
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- TZIHFWKZFHZASV-UHFFFAOYSA-N methyl formate Chemical compound COC=O TZIHFWKZFHZASV-UHFFFAOYSA-N 0.000 description 2
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- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 1
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 description 1
- 229910000733 Li alloy Inorganic materials 0.000 description 1
- 229910010238 LiAlCl 4 Inorganic materials 0.000 description 1
- 229910015015 LiAsF 6 Inorganic materials 0.000 description 1
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- 229910013528 LiN(SO2 CF3)2 Inorganic materials 0.000 description 1
- 229910013290 LiNiO 2 Inorganic materials 0.000 description 1
- RJUFJBKOKNCXHH-UHFFFAOYSA-N Methyl propionate Chemical compound CCC(=O)OC RJUFJBKOKNCXHH-UHFFFAOYSA-N 0.000 description 1
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- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 description 1
- 150000002222 fluorine compounds Chemical class 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
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- 238000005098 hot rolling Methods 0.000 description 1
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- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
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- 238000002955 isolation Methods 0.000 description 1
- 150000002596 lactones Chemical class 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 101150004907 litaf gene Proteins 0.000 description 1
- 239000001989 lithium alloy Substances 0.000 description 1
- SWAIALBIBWIKKQ-UHFFFAOYSA-N lithium titanium Chemical compound [Li].[Ti] SWAIALBIBWIKKQ-UHFFFAOYSA-N 0.000 description 1
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- 229910044991 metal oxide Inorganic materials 0.000 description 1
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- 229940017219 methyl propionate Drugs 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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- 229920001778 nylon Polymers 0.000 description 1
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- 229920000647 polyepoxide Polymers 0.000 description 1
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- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
- TWQULNDIKKJZPH-UHFFFAOYSA-K trilithium;phosphate Chemical class [Li+].[Li+].[Li+].[O-]P([O-])([O-])=O TWQULNDIKKJZPH-UHFFFAOYSA-K 0.000 description 1
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Classifications
-
- 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
Landscapes
- Battery Electrode And Active Subsutance (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Secondary Cells (AREA)
Description
負極層は、負極活物質を含有する。また、必要に応じて、導電助剤、バインダ、リチウム塩、電解質等のその他の成分をも含有しうる。
正極用組成物は通常はスラリー(正極用スラリー)として得られ、集電体(正極用最外層集電体を含む)の一方の面に塗布される。
上記で調製された正極用スラリーを集電体上に塗布した後、乾燥させて、含まれる溶媒を除去する。
負極用組成物は通常はスラリー(負極用スラリー)として得られ、集電体(負極集電体を含む)の正極層が作製された面とは反対の面に塗布される。
上記で調製された負極用スラリーを集電体に塗布した後、乾燥させて、含まれる溶媒を除去する。塗布方法、乾燥条件等については、「(2)正極層の作製」において説明したものと同様の態様が用いられるため、ここでの説明は省略する。
上記で作製されたバイポーラ電極を所望のサイズに切り出し、セパレータを介して複数積層させて、積層体を作製する。その後、これにゲル原料溶液を含浸させ、重合させて、バイポーラ電池を作製する。
絶縁層の形成は、例えば、単電池(セル)の周囲部に、所定の幅で織布や不織布等の多孔質体を配置することにより行われうる。この際、前記多孔質体の上部および下部に存在する集電体との境界面に、予め熱融着性ホットメルトを配置しておき、ホットプレスにより熱融着させることで、前記多孔質体を隣接する集電体に固定することができる。また、多孔質体自体の融点が低い場合には、多孔質体自体を熱融着性ホットメルトとして機能させてもよい。さらに、その上部および下部に粘着層を設けてなる両面粘着部材を多孔質体として用い、前記多孔質体を隣接する集電体に固定させてもよい。
積層体の正極側および負極側の最外層集電体上にそれぞれ、正極用タブ、負極用タブを接合させる。
最後に、積層体全体を電池ケース等の電池外装材で封止し、バイポーラ電池を完成させる。これにより、外部からの衝撃に対する耐性が向上し、環境劣化が防止される。封止の際には、正極用タブ、負極用タブの一部が電池外部に取り出される。
参考例1
以下の方法により、本発明のバイポーラ電池を作製した。
前記絶縁層として、空隙率18%のポリプロピレン製不織布を載置したこと以外は、前記参考例1と同様の方法および装置を用いて、バイポーラ電池を作製した。
前記絶縁層として、空隙率13%のポリプロピレン製不織布を載置したこと以外は、前記参考例1と同様の方法および装置を用いて、バイポーラ電池を作製した。
前記絶縁層として、空隙率8%のポリプロピレン製不織布を載置したこと以外は、前記参考例1と同様の方法および装置を用いて、バイポーラ電池を作製した。
前記絶縁層として、内側には、幅5mmおよび空隙率8%のポリプロピレン製不織布を載置し、外側には、幅5mmおよび空隙率28%のポリプロピレン製不織布を載置したこと以外は、前記参考例1と同様の方法および装置を用いて、バイポーラ電池を作製した。
前記絶縁層として、内側には、幅5mmおよび空隙率8%のポリプロピレン製不織布を載置し、外側には、幅5mmおよび空隙率20%のポリプロピレン製不織布を載置したこと以外は、前記参考例1と同様の方法および装置を用いて、バイポーラ電池を作製した。
前記絶縁層として、内側には、幅5mmおよび空隙率8%のポリプロピレン製不織布を載置し、外側には、幅5mmおよび空隙率15%のポリプロピレン製不織布を載置したこと以外は、前記参考例1と同様の方法および装置を用いて、バイポーラ電池を作製した。
前記絶縁層として、熱融着性ホットメルトである、中心にナイロン非溶融層(融点:200℃)を有し、その上下にポリオレフィン融着層(融点:98℃)を配置した三層構造ホットメルトフィルム(厚さ:90μm、空隙率:0%)を載置したこと以外は、前記参考例1と同様の方法および装置を用いて、バイポーラ電池を作製した。
上記で作製したバイポーラ電池について、下記の条件により充放電試験を行った。
13 集電体、
15 正極層、
17 負極層、
19 電解質層、
21 単電池(セル)、
23 積層体、
25 正極用最外層集電体、
27 負極用最外層集電体、
29 正極用タブ、
31 負極用タブ、
33 電池外装材、
35 絶縁層、
36,36a,36b 多孔質体、
37 樹脂、
44 正極端子、
46 負極端子、
48 検知タブ、
50 組電池、
52 外部弾性体、
55 組電池ケース、
56 バスバー、
59 端子リード。
Claims (8)
- 単電池の周囲に設けられる絶縁層の少なくとも一部に、絶縁性の多孔質体を含み、前記
絶縁層の内側から外側に向かうに従って、前記多孔質体の空隙率は増加する、バイポーラ
電池。 - 前記絶縁層は、絶縁性の多孔質体のみからなる、請求項1に記載のバイポーラ電池。
- 前記多孔質体の空隙率は1〜28%である、請求項1または2に記載のバイポーラ電池
。 - 前記多孔質体の空隙率は18〜28%である、請求項1〜3のいずれか一項に記載のパ
イポーラ電池。 - 前記絶縁層は、空隙率の異なる2つの多孔質体からなり、絶縁層の外側に存在する多孔
質体の空隙率は、前記絶縁層の内側に存在する多孔質体の空隙率の2倍以上である、請求
項1〜3のいずれか1項に記載のバイポーラ電池。 - 前記多孔質体は、織布または不織布からなる、請求項1〜5のいずれか1項に記載のバ
イポーラ電池。 - 前記多孔質体は、ポリエチレン、ポリプロピレン、ポリテトラフルオロエチレン、ポリ
エステル、ポリアミド、ポリイミド、シリコン、プライマーおよびウレタンからなる群か
ら選択される1種または2種以上の樹脂からなる、請求項1〜6のいずれか1項に記載の
バイポーラ電池。 - ゲルポリマー電池である、請求項1〜7のいずれか1項に記載のバイポーラ電池。
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