JP6821595B2 - 蓄電装置用電極板及びそれを備える蓄電装置 - Google Patents
蓄電装置用電極板及びそれを備える蓄電装置 Download PDFInfo
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- 238000003860 storage Methods 0.000 title claims description 37
- 239000011149 active material Substances 0.000 claims description 21
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 229910002804 graphite Inorganic materials 0.000 claims description 2
- 239000010439 graphite Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 description 73
- 239000007774 positive electrode material Substances 0.000 description 48
- 239000002002 slurry Substances 0.000 description 31
- 230000000052 comparative effect Effects 0.000 description 26
- 239000007773 negative electrode material Substances 0.000 description 15
- 239000011255 nonaqueous electrolyte Substances 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000004804 winding Methods 0.000 description 7
- 239000011230 binding agent Substances 0.000 description 6
- 239000002612 dispersion medium Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000002033 PVDF binder Substances 0.000 description 4
- 239000006230 acetylene black Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 239000006258 conductive agent Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000012856 packing Methods 0.000 description 4
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 229920003048 styrene butadiene rubber Polymers 0.000 description 4
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 239000011888 foil Substances 0.000 description 3
- 238000004898 kneading Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000002174 Styrene-butadiene Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- -1 for example Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000005060 rubber Substances 0.000 description 2
- 239000002562 thickening agent Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229910021383 artificial graphite Inorganic materials 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- RSNHXDVSISOZOB-UHFFFAOYSA-N lithium nickel Chemical compound [Li].[Ni] RSNHXDVSISOZOB-UHFFFAOYSA-N 0.000 description 1
- URIIGZKXFBNRAU-UHFFFAOYSA-N lithium;oxonickel Chemical compound [Li].[Ni]=O URIIGZKXFBNRAU-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/26—Electrodes characterised by their structure, e.g. multi-layered, porosity or surface features
- H01G11/28—Electrodes characterised by their structure, e.g. multi-layered, porosity or surface features arranged or disposed on a current collector; Layers or phases between electrodes and current collectors, e.g. adhesives
-
- 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
- H01M4/133—Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/66—Current collectors
- H01G11/68—Current collectors characterised by their material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/66—Current collectors
- H01G11/70—Current collectors characterised by their structure
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/74—Terminals, e.g. extensions of current collectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/008—Terminals
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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
- 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
-
- 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
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- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
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- H01M4/64—Carriers or collectors
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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
- H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
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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
- H01M2004/028—Positive 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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
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- Microelectronics & Electronic Packaging (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Manufacturing & Machinery (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
Description
領域30b,30cの間に無地部40及び第1領域30aが存在している。
ができる。第1領域30aの活物質充電密度を高くすることにより、第1領域30aの弾性係数Eb1を第2領域の弾性係数Ec1よりも大きくすることができる。
Fa2=F×〔(Aa×Ea)/(Ab×Eb2+Aa×Ea)〕…(式1)
面積を表す。
(正極活物質スラリーの作製)
正極活物質としてのリチウムニッケル複合酸化物と、導電剤としてのアセチレンブラック(AB)と、結着剤としてのポリフッ化ビニリデン(PVDF)とを所定の割合で混合した。その混合物を分散媒としてのN−メチル−ピロリドン(NMP)中で混練することによって正極活物質スラリーを作製した。
上記のようにして作製した正極活物質スラリーを本開示の一実施形態として説明した方法に従ってアルミニウム箔からなる正極集電体の両面に塗布し、乾燥した。乾燥した正極活物質スラリーを所定厚みに圧縮して正極活物質層を形成し、正極集電体の幅方向の両端部をスリットして長尺の正極極板材を作製した。正極活物質スラリーを塗布する際、正極極板材の無地部と正極集電体の幅方向に隣り合う第1領域の塗布量を調整して、第1領域の活物質密度が互いに異なる実験例1〜10に係る正極極板材を作製した。得られた長尺の正極極板材はフープ状に巻き取った。正極極板材の無地部と正極集電体の幅方向に隣り合う第1領域の弾性係数をEb、第1領域を除く正極活物質層が設けられた領域を構成する第2領域の弾性係数をEcとした。実験例1〜10の第1領域の弾性係数Ebを、第2領域の弾性係数Ecを用いた式で表1に示す。弾性係数Ecの具体的な値は30kN/mm2であった。
負極活物質として人造黒鉛と、結着剤としてのスチレン−ブタジエン共重合体ゴム(SBR)と、増粘剤としてのカルボキシメチルセルロース(CMC)とを所定の割合で混合した。その混合物を分散媒としての水中で混練することによって負極活物質スラリーを作製した。
上記のようにして作製した負極活物質スラリーを銅箔からなる負極集電体の両面に塗布し、乾燥した。塗布方法としては、完成した負極板の長手方向に一端部に無地部が設けられるように従来技術の間欠塗布を採用した。乾燥した負極活物質スラリーを所定厚みに圧縮して負極活物質層を形成し、負極集電体の幅方向の両端部をスリットして長尺の負極極板材を作製した。得られた長尺の負極極板材はフープ状に巻き取った。
実験例1〜10に係る各正極極板材と上記の負極極板材と組み合わせて、次のように実験例1〜10に係る電極群を作製した。まず、正極極板材、負極極板材及びポリエチレン製微多孔膜からなるセパレータを巻取装置に取り付けた。巻取装置では、正極極板材と負極極板材の端部を巻芯の位置まで引き出して、正極極板材と負極極板材をそれらの間にセパレータが介在するように巻回した。巻回後に正極極板材と負極極板材を切断し、電極群の最外周の端部をテープで固定して係る電極群を作製した。このように、正極極板材と負極極板材を巻取装置で切断してそれぞれ正極板と負極板を形成した。また、巻取装置内で正極極板材と負極極板材の走行が停止したタイミングで、正極極板材と負極極板材の無地部にリードを接合した。正極板の幅方向の長さを60mm、長手方向の長さを1000mmとした。正極板の無地部の幅方向の長さを5mm、長手方向の長さを6mmとした。そして、負極板の幅方向の長さを61mm、長手方向の長さを1050mmとした。
電極群の作製する際の正極極板材の走行条件として、正極極板材にかけられるテンション及び正極極板材の走行速度を以下のように二つの条件を採用し、それぞれの条件に基づいて電極群を作製した。
条件1 : テンション 13N、走行速度 50m/分
条件2 : テンション 18N、走行速度 60m/分
Claims (5)
- 略矩形の集電体と、
前記集電体の少なくとも一方の面に設けられた活物質層と、
を備え、
前記集電体は、電極リードが接続される無地部を長手方向の一部領域における幅方向の一端部に有し、
前記活物質層が設けられた領域において、前記無地部に前記幅方向に隣り合う第1領域の弾性係数が前記無地部及び前記第1領域が占める領域に前記長手方向に隣り合う第2領域の弾性係数よりも大きい、蓄電装置用電極板。 - 請求項1に記載の蓄電装置用電極板において、
前記第1領域の弾性係数を、Eb〔N/m2〕とし、前記第2領域の弾性係数を、Ec〔N/m2〕としたとき、
1.1×Ec≦Eb≦5.5×Ecである、蓄電装置用電極板。 - 請求項1又は2に記載の蓄電装置用電極板において、
前記第1領域に設けられた前記活物質層の密度が、前記第2領域に設けられた前記活物質層の密度よりも高い、蓄電装置用電極板。 - 請求項1乃至3のいずれか1つに記載の蓄電装置用電極板を備える、蓄電装置。
- 請求項4に記載の蓄電装置において、
前記蓄電装置用電極板が正極板であり、
さらに、活物質として黒鉛を含む負極板と、
前記正極板と前記負極板との間に配置されたセパレータと、
を備える、蓄電装置。
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PCT/JP2016/004838 WO2017085917A1 (ja) | 2015-11-20 | 2016-11-09 | 蓄電装置用電極板及びそれを備える蓄電装置 |
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JPS57199956U (ja) * | 1981-06-17 | 1982-12-18 | ||
JPH0714570A (ja) * | 1993-06-25 | 1995-01-17 | Furukawa Electric Co Ltd:The | 電池用電極 |
JP2002124252A (ja) * | 2000-10-12 | 2002-04-26 | Yuasa Corp | 蓄電池用極板の製造方法 |
JP2003068271A (ja) | 2001-06-13 | 2003-03-07 | Matsushita Electric Ind Co Ltd | リチウム二次電池及びこの電池に用いる正極板の製造方法 |
JP4301286B2 (ja) * | 2006-12-21 | 2009-07-22 | トヨタ自動車株式会社 | 蓄電装置 |
JP5423113B2 (ja) * | 2009-04-13 | 2014-02-19 | 株式会社Gsユアサ | 電池 |
JP2011204660A (ja) | 2010-03-04 | 2011-10-13 | Sanyo Electric Co Ltd | リチウム二次電池 |
JP5459139B2 (ja) * | 2010-08-05 | 2014-04-02 | トヨタ自動車株式会社 | 組電池 |
JP5733244B2 (ja) * | 2012-03-15 | 2015-06-10 | 株式会社豊田自動織機 | 蓄電装置及び二次電池並びに車両 |
JP2014029852A (ja) * | 2012-07-03 | 2014-02-13 | Toyota Industries Corp | 電極の製造方法、電極及び蓄電装置 |
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CN108352495B (zh) | 2021-05-28 |
US10468667B2 (en) | 2019-11-05 |
WO2017085917A1 (ja) | 2017-05-26 |
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