JP4686825B2 - Method for producing battery electrode with solid electrolyte layer - Google Patents
Method for producing battery electrode with solid electrolyte layer Download PDFInfo
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- JP4686825B2 JP4686825B2 JP2000230806A JP2000230806A JP4686825B2 JP 4686825 B2 JP4686825 B2 JP 4686825B2 JP 2000230806 A JP2000230806 A JP 2000230806A JP 2000230806 A JP2000230806 A JP 2000230806A JP 4686825 B2 JP4686825 B2 JP 4686825B2
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- 239000000243 solution Substances 0.000 description 38
- 229920006254 polymer film Polymers 0.000 description 17
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 12
- 229920001577 copolymer Polymers 0.000 description 10
- 239000002245 particle Substances 0.000 description 9
- 239000011245 gel electrolyte Substances 0.000 description 8
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 7
- 229910001416 lithium ion Inorganic materials 0.000 description 7
- 239000008151 electrolyte solution Substances 0.000 description 5
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- 150000002500 ions Chemical class 0.000 description 4
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- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 3
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- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
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- 229910052744 lithium Inorganic materials 0.000 description 2
- HSZCZNFXUDYRKD-UHFFFAOYSA-M lithium iodide Chemical compound [Li+].[I-] HSZCZNFXUDYRKD-UHFFFAOYSA-M 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
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- 229920000098 polyolefin Polymers 0.000 description 2
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- 238000002360 preparation method Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
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- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
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- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
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- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
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- 239000012141 concentrate Substances 0.000 description 1
- 229920001940 conductive polymer Polymers 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
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- 239000007772 electrode material Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
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- 229910052740 iodine Inorganic materials 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- IDBFBDSKYCUNPW-UHFFFAOYSA-N lithium nitride Chemical compound [Li]N([Li])[Li] IDBFBDSKYCUNPW-UHFFFAOYSA-N 0.000 description 1
- 229910001386 lithium phosphate Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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- 239000000075 oxide glass Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
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- TWQULNDIKKJZPH-UHFFFAOYSA-K trilithium;phosphate Chemical compound [Li+].[Li+].[Li+].[O-]P([O-])([O-])=O TWQULNDIKKJZPH-UHFFFAOYSA-K 0.000 description 1
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Images
Classifications
-
- 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
- H01G11/04—Hybrid capacitors
- H01G11/06—Hybrid capacitors with one of the electrodes allowing ions to be reversibly doped thereinto, e.g. lithium ion capacitors [LIC]
-
- 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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Description
【０００１】
【発明の属する技術分野】
本発明は、電池用電極間のイオン導電性を担保する固体電解質を電池用電極の表面に一体的に形成した固体電解質層付き電池用電極の製造方法に関する。
【０００２】
【従来の技術】
近年、ノート型コンピューター、小型携帯機器、あるいは自動車のクリーンなエネルギー源として高性能二次電池の開発が盛んである。ここで用いられる二次電池には小型、軽量でありながら大容量・高出力であること、即ち高エネルギーー密度・高出力密度であることが求められているが、高エネルギーを貯蔵することから安全性の確保が重要である。また、市場に早期に普及するために、材料コストの低減が求められている。
【０００３】
高エネルギー密度・高出力密度を達成できる二次電池としては、リチウムイオン二次電池等の非水電解質二次電池が有力視されている。一般的にリチウムイオン二次電池は、リチウムイオンを吸蔵および放出できる薄膜状の正極および負極と、その間に介在・積層されたポリエチレンやポリプロピレン等の高分子から構成される微多孔膜であるセパレータと、正極と負極との間でリチウムイオンを移動させる電解液とを備えている。
【０００４】
従来の電池に使われているポリオレフィン系の微多孔膜からなるセパレ−タは、製造方法が複雑なため高価で、電池コストの中で占める比率が大きくなっている。また、１５０℃を越えるような高温では、シャットダウン機能はうまく働かず、収縮・破膜するなどしてショートする危険性がある。
【０００５】
ポリオレフィン系セパレ−タと有機電解液を組み合わせた電池では安全性を高めるために、ＰＴＣや過充電防止機構など、電池機能には直接関与しない部材、制御部品などが必要となりさらにコストが高くなっている。
【０００６】
このため安価に安全性を高めるために、有機電解液を用いない高分子固体電解質膜あるいは電解液を含浸させた高分子ゲルを用いた電池の開発が急速に進んでいる。しかしながら固体電解質やゲル電解質は電気伝導度が低く特に電極とこれら固体電解質・ゲル電解質との界面での抵抗が大きいことから、大きな電流密度での充放電には正極、負極との接合を強固にする必要がある。このために、あらかじめ作製したフィルム状の高分子膜を正極、負極とラミネートする方法や正極あるいは負極上に直接高分子膜を形成する合剤を塗布する方法がある。前者の方法では、高分子膜を作製する工程とラミネートする工程が別々であり、工程が複雑でコストを引き上げており、また電極との接合が充分でない。後者では塗布基材が電極であることから、電極に平滑性、欠陥がないことが求められ、薄く均一な高分子膜の十分な歩留りが得られない。
【０００７】
【発明が解決しようとする課題】
本発明は、安全性が高く、低コスト・高出力な二次電池を実現する目的で、固体電解質層付き電池用電極の製造方法を提供することを解決すべき課題とする。
【０００８】
【課題を解決するための手段】
上記課題を解決する目的で、本発明者らは鋭意研究の結果、電気泳動を応用することにより薄い固体電解質層を形成でき、かつ電池用電極と固体電解質層との接合性を向上できることを見出した。すなわち、電気泳動法は、学会（電気化学学会 第６６回大会要旨 発表Ｎｏ．Ｐ２４）で開示された集電体表面に電極活物質層の薄膜を形成することができる他に、電気泳動法を固体電解質層の形成に応用すると、固体電解質層薄膜の均一化、電池用電極と固体電解質層との接合性の向上をも達成できることを発見した。
【０００９】
すなわち、本発明の固体電解質層付き電池用電極の製造方法は、電池用電極と、該電池用電極と一体的に形成され電池用電極間のイオン移動を可能とする固体電解質層とをもつ固体電解質層付き電池用電極の製造方法であって、前記固体電解質を構成する構成材料を溶媒中に分散ないし溶解させた溶液中に前記電池用電極を浸漬する浸漬工程と、電気泳動用電極を用いて前記溶液内に電位勾配を発生させて前記構成材料を電気泳動により前記電池用電極表面に付着させる電気泳動工程と、を有し、前記浸漬工程において、前記電池用電極は、ロール状に巻回された前記電池用電極を保持し送出する送出手段により前記溶液中に送出され、前記溶液を通過後、前記電池用電極を巻き取る取込手段により巻き取られ、 前記電気泳動用電極は、前記溶液内で前記電池用電極が通過する部分を覆うことを特徴とする。
【００１０】
つまり、電気泳動法を固体電解質層の形成に応用すると、電池用電極表面の固体電解質層が形成されていない部分に集中的に電流が流れるので電流密度が高くなり、その部分に電気泳動が集中することで、固体電解質層が形成されていない部分に優先的に固体電解質層が形成される。したがって、固体電解質層形成が遅れている部分に優先して固体電解質層が形成されるので、固体電解質層の構成材料が粒子もしくは分子レベルで電池用電極の表面に接合でき、結果的に固体電解質層が均一に電池用電極表面に形成されることとなる。また、電気泳動時の印加電圧等を調節することで、固体電解質層と電池用電極との接合性を制御できるという効果がある。
【００１１】
そして、前記電気泳動工程において少なくとも正極、負極からなる２種類の電極によって前記電位勾配を発生させており、該正極および負極のうちのいずれか一方は前記電池用電極が兼ね、他方は前記電気泳動用電極であることが好ましい。電池用電極に直接電圧を印加することにより、電気泳動の制御をより精密に行うことができ、さらに電気泳動専用の電極の総数を減らすことができる。また、電池用電極の両面に固体電解質層を形成するために、さらに他方の電極は前記電池用電極の両面側にそれぞれ１つずつ設けられた前記電気泳動用電極であることがより好ましい。
【００１２】
さらに、固体電解質層の形成されていない部分を設けるために、前記電池用電極から独立した部材であって、該電池用電極表面の所定部位への前記構成材料の電気泳動を阻害する遮蔽部材をもつことが好ましい。
【００１３】
また、前記構成材料の粒子径が５０μｍ以下であることが好ましい。粒子径を５０μｍ以下とすると、空隙率が同じであってもよりイオン伝導度が小さい固体電解質層となるからである。
【００１４】
また、構成材料の表面電位を制御するために前記溶液中には、前記構成材料の表面を帯電させる帯電剤を含むことが好ましい。
【００１５】
【発明の実施の形態】
本実施形態の固体電解質層付き電池用電極の製造方法は、浸漬工程と電気泳動工程とからなる。
【００１６】
〔電池用電極〕
本製造方法が適用できる「電池用電極」は、どのような電池に用いられるものであっても良く、正極および負極のいずれかであって対極との間に電極間のイオン移動性を担保する固体電解質を介在させて電池が形成される電池に用いられる電池用電極である。たとえば、リチウムイオン二次電池が例示される。そして一般的な電池以外にも電気二重層キャパシタのようなものの電極をも含む意味である。なお、本明細書での「固体電解質」とは、純粋に固体のみから構成される電解質のみを意味するものではなく、ゾル・ゲル状のように内部に液体を保持している電解質であってもよい。
【００１７】
〔浸漬工程〕
浸漬工程は、固体電解質層を構成する構成材料を溶媒中に分散させた溶液中に電池用電極を浸漬する工程である。この浸漬工程において、電池用電極は全体を同時に浸漬するばかりでなく連続的に溶液中に浸漬されても良い。
【００１８】
構成材料は、溶液中においてよく分散するように、粒子径を５０μｍ以下、特に１μｍ以下とすることが望ましい。また、粒度分布をよりブロードとすることで孔径が小さくでき、低抵抗化を図ることができるので好ましい。また、構成材料は、溶液中で分散させる他に溶媒に溶解させて用いることもできる。
【００１９】
構成材料の溶液中への適正な含有割合は、用いる溶媒・電気泳動工程の条件等によって大きく異なる。これは、後述する電気泳動工程によって構成材料が一様に電池用電極の表面に付着するのではなく構成材料の荷電・質量等の変化により溶液中での移動速度が異なることによって付着の様子が異なるからである。また、構成材料の荷電は使用する溶媒、溶液温度、帯電剤によっても影響される。
【００２０】
固体電解質層の構成材料は、Ｌｉ等の電池に使用されているイオンがドープ・移動することが可能な材料である。たとえば、ポリエチレンオキサイド、ポリプロピレンオキサイド、ポリアクリロニトリル、ポリメチロールシロキサン、ポリメタクリル酸メチル、ポリフッ化ビニリデンなどの導電性高分子およびこれらの変性品（共重合、分岐を導入したもの等）などの高分子材料、またはヨウ化リチウム、窒化リチウム、リン酸チタン酸リチウム、リン酸ジルコニアリチウム、リチウムアルミ窒化物、酸化物ガラス、硫化物ガラスのうちから選ばれる１以上の化合物等のＬｉのドープ・移動が可能な無機電解質が望ましい。
【００２１】
また、固体電解質層の構成材料以外の物質であっても必要に応じて混合することができる。
【００２２】
構成材料を粉体のまま分散させて溶液中に分散させる場合、溶媒としてはアセトン等のケトン類およびエタノール等のアルコール類等の有機溶剤、水、およびこれらの混合溶媒が使用できる。また構成材料を膨潤・溶解させる溶媒を添加することで、構成材料を膨潤させ、溶液内での粒子の浮きや沈降を低減することができる。粒子が大きい・比重が溶媒と大きく異なるなど、安定した分散系が得られない場合には、スタラーや超音波などで物理的に粒子を分散させでも良い。
【００２３】
この時に分散質である構成材料に電荷を付与するためヨウ素や界面活性剤などの粒子に電荷を付与できる帯電剤を添加しても良い。また、溶媒中のｐＨを調整することでも、構成材料を溶媒に安定に分散させたり、構成材料の電荷を制御することもできる。ｐＨとしては、限定されるものでないが、３〜１２が特に望ましい。
【００２４】
こうした構成材料の分散安定性は、溶液の温度の影響も受けやすいことから、溶液の温度調整を行うことが好ましい。槽内の温度としては、限定されるものではないが、−１０〜５０℃が特に望ましい。たとえば、温度調整の方法としては、溶液を保持する槽内に冷却水などの熱媒を循環させたりすること等により達成できる。
【００２５】
〔電気泳動工程〕
電気泳動工程は、溶液内に電位勾配を発生させることで固体電解質層の構成材料を溶液内で電気泳動させて電池用電極表面に付着させる工程である。この電気泳動工程では、電池用電極表面の所定部位への固体電解質層の構成材料の電気泳動を阻害する電池用電極と独立して配設された遮蔽部材を用いることが好ましい。たとえば、集電用のリード等を形成する部分に遮蔽部材を配設することにより、固体電解質層の形成される部分を制御できる。
【００２６】
溶液内に電位勾配を発生させる方法としては、たとえば、対向する２つの電気泳動用電極に電圧を印加することで達成できる。電気泳動用電極の形状は、電池用電極の表面に均一に構成材料が付着するように、溶液内で電池用電極が通過する部分の電位勾配が一定とすることができる形状が好ましい。たとえば、電気泳動用電極の大きさを電池用電極が通過する部分を覆うのに充分な大きさとする。そして、電気泳動用電極のいずれか一方は溶液内に浸漬された電池用電極が兼ねることができる。電池用電極を電気泳動用電極とすることで、直接、構成材料を電池用電極に付着させることができる。なお、溶液内に発生させる電位勾配の向きは、構成材料等の溶液内における帯電電位により決定される。すなわち、帯電した構成材料等が電池用電極方向に移動するように電位勾配が決定される。たとえば、構成材料を正に帯電させた場合は電池用電極を負極とする。また、電気泳動用電極の数は２つに限られず、必要に応じて３以上としても良い。たとえば、電池用電極の両面に固体電解質層を形成したい場合に、電池用電極を正極とし、２つの負極を電池用電極の両面に設けることで電池用電極の両面に構成材料を付着させ固体電解質層を形成することができる。
【００２７】
電気泳動用電極に印加する電圧、電圧印加時間等の条件としては特に限定されず、電池用電極表面に形成されるべき固体電解質層の厚さ、空隙率、組成等に応じて適宜選択される。電圧を高くすれば、固体電解質層が緊密化し空隙率が小さくなる。ヨウ素添加アセトン溶液を溶媒に用いた場合に好ましい印加電圧としては５〜１０００Ｖ、より好ましくは１０〜５００Ｖ程度を挙げることができる。また、電圧を印加する時間を長くすると、電池用電極表面の固体電解質層が厚くなる。また、構成材料以外に溶媒に分散させた物質は、その性質により溶液中での表面電位が異なり電気泳動の速度が異なるので電気泳動用電極に印加する電圧を目的の固体電解質層組成・構造となるように調節する。なお、電池用電極表面に形成する固体電解質層の厚さは電池用電極片面当たり好ましくは５０μｍ以下、より好ましくは２５μｍ以下、さらに好ましくは１０μｍ以下とする。固体電解質層の厚さが薄い方が電池の内部抵抗が低くなりより高出力の電池を提供できるからである。このように薄い固体電解質層は従来の溶剤キャスト法等では精度の高い形成が困難であった。それに対し電気泳動法によると、電気泳動は電位勾配の大きい部分に優先的に構成材料が付着するので固体電解質層の厚さに不均等が生じると固体電解質層が薄い部分から構成材料が付着して形成される固体電解質層の厚さは一定になるという利点がある。
【００２８】
遮蔽部材は、電池用電極の固体電解質層を形成させたくない部位に近接して設けられる。遮蔽部材と電池用電極との隙間は小さい方が固体電解質層の構成材料の不必要な部分への回り込みが少なくなる。また、遮蔽部材は構成材料が移動する側と反対の電気泳動用電極の電位よりも構成材料が移動する側の電気泳動用電極の電位に近く調節されることが好ましい。さらに、遮蔽部材は電池用電極と同電位に調節されることがより好ましい。電位を調節することにより、遮蔽部材と電池用電極との隙間に電位勾配が少なくなるので、電池用電極への固体電解質層の付着が少なくなるからである。そして、遮蔽部材は絶縁体とすることもできる。遮蔽部材を絶縁体とすることにより遮蔽部材に付着する活物質量が材料の無駄が少なくなるので好ましい。
【００２９】
また、電気泳動工程においても溶液内の構成材料が沈殿しないように何らかの方法で溶液の攪拌を続けることが好ましい。
【００３０】
【実施例】
以下に実施例に基づき詳細に説明するが、本発明は下記の実施例に限定されるものではない。
【００３１】
（電池用電極の製造）
ＮＭＰに溶解したフッ化ビニリデン−ヘキサフルオロプロピレン共重合体（結着材）、ニッケル酸リチウム（正極活物質）、ゲッチェンブラック（導電材）からなるリチウムイオン二次電池用正極合剤ペーストを集電体としてのアルミ箔に塗布・乾燥後プレス成形することで電池用電極としての正極１１を得た。
【００３２】
次にＮＭＰに溶解したフッ化ビニリデン−ヘキサフルオロプロピレン共重合体（結着材）及びグラファイト（負極活物質）からなるリチウムイオン二次電池用負極合剤ペーストを集電体としての銅箔に塗布し乾燥後プレス成形することで電池用電極としての負極１０を作製した。
【００３３】
これらの正極・負極を用いて以下の実施例を説明する。
【００３４】
（固体電解質層付き電池用電極の製造装置）
図１に示す固体電解質層付き電池用電極の製造装置を用いて固体電解質層付き電池用電極を製造した。本製造装置はロール状に巻回された電池用電極１０、１１を保持し送出する送出手段１と溶液槽２と溶液槽２内に設けられた２枚の電極板３１、３２とその電極板３１、３２の間の電池用電極１０、１１進行方向に向かって右側に電池用電極１０、１１の厚さ程度の隙間をあけて設けられた金属製の遮蔽部材５１、５２と溶液槽２内の電極板３１、３２および遮蔽部材５１、５２の間に電池用電極１０、１１が通過して溶液内に浸漬するように保持するガイド６、７、８、９と電池用電極１０、１１を巻き取る取込手段４とからなる。そして電圧の制御が可能な直流電源９０の負極を遮蔽部材５１、５２および送出手段１を介して電池用電極１０、１１に接続し、正極を電極板３１、３２に接続する。これにより遮蔽部材５１、５２と電池用電極１０、１１とは等電位となる。
【００３５】
したがって、図２に示すように、電極板３１、３２から電池用電極１０、１１の方向へ電気泳動された固体電解質の構成材料は遮蔽部材５１、５２によって遮蔽されるので、電池用電極１０、１１のＢの部分には固体電解質層が形成されない。遮蔽部材５１、５２は電池用電極１０、１１と同電位に調節されているので、遮蔽部材５１、５２と電池用電極１０、１１との間に固体電解質の構成材料が回り込む量を減らすことができる。なお、図２においてＡは電池用電極１０、１１上に付着した固体電解質層を示す。
【００３６】
送出手段１に保持された電池用電極１０、１１は、ガイド６、７、８、９により溶液槽２内を通過し取込手段３により取り込まれる。
【００３７】
（実施例１）
〔電気泳動槽中の高分子分散液の調製〕
ＮＭＰに溶解した固体電解質の構成材料としてのフッ化ビニリデン−ヘキサフルオロプロピレン共重合体１０％溶液１０ｇをアセトン中１００ｇ中に滴下し、スタラーで攪拌し、フッ化ビニリデン−ヘキサフルオロプロピレン共重合体をアセトン中に分散した。
【００３８】
〔電極上への高分子膜の作製〕
電池用電極として前述の負極１０を正端子（正電位）に接続し、負端子（負電位）に電気泳動用電極板３１、３２を接続した。電池用電極１０と電気泳動用電極板３１、３２との間を１０ｍｍとし、直流電源を接続し４００Ｖの電圧を１分間印加することで、負極１０上に高分子膜を作製した。断面構造観察の結果、図３に示すように、固体電解質層２０は、電池用電極１０内の空孔内にも析出し強固かつ一体的に固着していた。
【００３９】
〔ゲル電解質電池の作製〕
上記高分子膜を正極および負極の間に積層し捲回した後、電池缶に挿入した。この後ＬｉＰＦ6 を溶解した炭酸エチレン、炭酸プロピレン電解質溶液を電池に含浸し、正極、負極、高分子膜中のフッ化ビニリデン−ヘキサフルオロプロピレン共重合体を膨潤させることで全ゲル電解質電池を作製した。
【００４０】
（実施例２）
〔電気泳動槽中の高分子分散液の調製〕
ＮＭＰに溶解したフッ化ビニリデン−ヘキサフルオロプロピレン共重合体１０％溶液１０ｇをアセトン中１００ｇ中に滴下し、スタラーで攪拌し、フッ化ビニリデンーヘキサフルオロプロピレン共重合体をアセトン中に分散した。
【００４１】
〔電極上への高分子膜の作製〕
電池用電極として前述の正極１１を正端子に接続し、負端子に電気泳動用電極３１、３２を接続した。電池用電極１０と電気泳動用電極板３１、３２との間を１０ｍｍとし、直流電源を接続し４００Ｖの電圧を１分間印加することで、正極１１上に高分子膜を作製した。
【００４２】
次に負極１０に正端子を接続し、電気泳動用電極３１、３２に負端子を接続した。電池用電極１０と電気泳動用電極板３１、３２との間を１０ｍｍとし、直流電源を接続し４００Ｖの電圧を１分間印加することで、負極１０上に高分子膜を作製した。
【００４３】
固体電解質層２０を一体的に固着していた負極１０および正極１１を重ねあわせ加熱することで、断面構造観察の結果、図４に示すように、正極１１、負極１０間を固体電解質層２０の接合面の境目なく連続的に接合した。
【００４４】
〔ゲル電解質電池の作製〕
上記高分子膜を正極および負極の間に積層し捲回した後、電池缶に挿入した。この後ＬｉＰＦ6 を溶解した炭酸エチレン、炭酸プロピレン電解質溶液を電池に含浸し、正極、負極、高分子膜中のフッ化ビニリデン−ヘキサフルオロプロピレン共重合体を膨潤させることで全ゲル電解質電池を作製した。
【００４５】
（比較例）
〔高分子膜の作製〕
ＮＭＰに溶解したフッ化ビニリデン−ヘキサフルオロプロピレン共重合体１０％溶液をポリエステルフィルム上に塗布、乾燥することで高分子膜を得た。断面構造観察の結果、図５に示すように、固体電解質層２０は、電池用電極１０と表面的に接触するのみであった。
【００４６】
〔ゲル電解質電池の作製〕
上記高分子膜を正極および負極の間に積層し捲回した後、電池缶に挿入した。この後ＬｉＰＦ6 を溶解した炭酸エチレン、炭酸プロピレン電解質溶液を電池に含浸し、正極、負極、高分子膜中のフッ化ビニリデン−ヘキサフルオロプロピレン共重合体を膨潤させることで全ゲル電解質電池を作製した。
【００４７】
【内部抵抗の測定】
実施例１、実施例２および比較例の電池の内部抵抗を測定した。その結果比較例の内部抵抗を１．０とした時、実施例１および実施例２でそれぞれ０．９および０．８となった。
【００４８】
以上のように、本発明の製造方法によると、電池用電極の表面状態・空隙率等に影響されることなく電池用電極に強力に結合した薄い固体電解質層を電池用電極の表面に一体的に形成することができるという利点がある。また、溶剤キャスト法等のように高分子溶液を塗布した後の析出工程等の工程を経ることなく少ない工程・短い時間で固体電解質層付き電池用電極を製造することができるという利点もある。また、固体電解質層を従来のものよりも容易に薄くすることができるので、電池の内部抵抗についても低いものを提供できるという利点がある。
【００４９】
【発明の効果】
以上のように本発明の製造方法によると、安全性が高く、低コスト・高出力な二次電池を実現する目的で、固体電解質層付き電池用電極の製造方法を提供することができるという効果を有する。
【図面の簡単な説明】
【図１】実施例で用いた製造装置の概略図である。
【図２】実施例で用いた製造装置の電極板と遮蔽部材との配置の様子を示した図である。
【図３】実施例１の電池用電極の断面模式図である。
【図４】実施例２の電池用電極の断面模式図である。
【図５】比較例の電池用電極の断面模式図である。
【符号の説明】
１…送出手段 １０…電池用電極（負極） １１…電池用電極（正極）
Ａ…電池用電極（固体電解質層形成部） Ｂ…電池用電極（固体電解質層未形成部） ２…溶液槽 ３１、３２…電極板 ４…取込手段 ５１、５２…遮蔽部材 ６、７、８、９…ガイド ９０…直流電源[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for producing a battery electrode with a solid electrolyte layer in which a solid electrolyte that ensures ionic conductivity between battery electrodes is integrally formed on the surface of the battery electrode.
[0002]
[Prior art]
In recent years, high-performance secondary batteries have been actively developed as clean energy sources for notebook computers, small portable devices, and automobiles. The secondary battery used here is required to have a large capacity and high output despite its small size and light weight, that is, high energy density and high output density, but it is safe because it stores high energy. It is important to ensure sex. Moreover, in order to spread to the market at an early stage, reduction of material cost is required.
[0003]
As secondary batteries that can achieve high energy density and high output density, non-aqueous electrolyte secondary batteries such as lithium ion secondary batteries are considered promising. In general, a lithium ion secondary battery includes a thin-film positive electrode and negative electrode that can occlude and release lithium ions, and a separator that is a microporous film composed of a polymer such as polyethylene or polypropylene interposed and laminated therebetween. And an electrolytic solution for moving lithium ions between the positive electrode and the negative electrode.
[0004]
Separators made of polyolefin-based microporous membranes used in conventional batteries are expensive due to the complicated manufacturing method, and the proportion of the battery cost is large. Also, at a high temperature exceeding 150 ° C., the shutdown function does not work well, and there is a risk of short-circuiting due to shrinkage or film breakage.
[0005]
Batteries that combine polyolefin-based separators and organic electrolytes require higher parts, such as PTC and overcharge prevention mechanisms, parts that are not directly related to battery functions, and control components. Yes.
[0006]
For this reason, in order to improve safety at low cost, development of a battery using a polymer solid electrolyte membrane that does not use an organic electrolyte solution or a polymer gel impregnated with an electrolyte solution is rapidly progressing. However, solid electrolytes and gel electrolytes have low electrical conductivity, especially resistance at the interface between the electrode and these solid electrolytes / gel electrolytes. Therefore, for charging / discharging at a large current density, the positive and negative electrodes should be firmly joined. There is a need to. For this purpose, there are a method of laminating a film-like polymer film prepared in advance with a positive electrode and a negative electrode, and a method of applying a mixture directly forming a polymer film on the positive electrode or the negative electrode. In the former method, the process of producing the polymer film and the process of laminating are separate, the process is complicated and the cost is increased, and the bonding with the electrode is not sufficient. In the latter case, since the coated substrate is an electrode, the electrode is required to be smooth and free from defects, and a sufficient yield of a thin and uniform polymer film cannot be obtained.
[0007]
[Problems to be solved by the invention]
An object of the present invention is to provide a method for producing a battery electrode with a solid electrolyte layer for the purpose of realizing a secondary battery having high safety, low cost, and high output.
[0008]
[Means for Solving the Problems]
In order to solve the above problems, the present inventors have found that, as a result of intensive research, a thin solid electrolyte layer can be formed by applying electrophoresis, and the bonding property between the battery electrode and the solid electrolyte layer can be improved. It was. That is, the electrophoresis method can form a thin film of an electrode active material layer on the surface of the current collector disclosed in an academic society (The Electrochemical Society 66th Annual Meeting Presentation No. P24). When applied to the formation of a solid electrolyte layer, it was found that the solid electrolyte layer thin film can be made uniform and the bonding property between the battery electrode and the solid electrolyte layer can be improved.
[0009]
That is, the method for producing a battery electrode with a solid electrolyte layer according to the present invention comprises a battery electrode and a solid electrode having a solid electrolyte layer formed integrally with the battery electrode and capable of ion migration between the battery electrodes. A method for producing an electrode for a battery with an electrolyte layer, comprising: an immersion step of immersing the battery electrode in a solution in which a constituent material constituting the solid electrolyte is dispersed or dissolved in a solvent; and an electrode for electrophoresis anda electrophoretic depositing on the cell electrode surface by electrophoresis the component material by generating a potential gradient in the solution within Te, in the immersion step, the battery electrode is wound into a roll It is sent into the solution by sending means for holding and sending the rotated battery electrode, and after passing through the solution, taken up by take-up means for winding the battery electrode, Said Wherein the cover portion has the cell electrode within the liquid passes.
[0010]
In other words, when the electrophoresis method is applied to the formation of the solid electrolyte layer, current flows intensively in the portion of the battery electrode surface where the solid electrolyte layer is not formed, so that the current density increases, and electrophoresis concentrates in that portion. By doing so, a solid electrolyte layer is preferentially formed in a portion where the solid electrolyte layer is not formed. Therefore, since the solid electrolyte layer is formed in preference to the portion where the formation of the solid electrolyte layer is delayed, the constituent material of the solid electrolyte layer can be bonded to the surface of the battery electrode at the particle or molecular level, resulting in the solid electrolyte. The layer is uniformly formed on the surface of the battery electrode. Moreover, there is an effect that the bonding property between the solid electrolyte layer and the battery electrode can be controlled by adjusting the applied voltage or the like during electrophoresis.
[0011]
In the electrophoresis step, the potential gradient is generated by at least two kinds of electrodes including a positive electrode and a negative electrode, and one of the positive electrode and the negative electrode serves as the battery electrode , and the other serves as the electrophoresis. use electrode der Rukoto is preferable. By directly applying a voltage to the battery electrode, the electrophoresis can be controlled more precisely, and the total number of electrodes dedicated to electrophoresis can be reduced. Moreover, in order to form a solid electrolyte layer on both surfaces of the battery electrode, it is more preferable that the other electrode is the electrophoresis electrode provided on the both surfaces of the battery electrode.
[0012]
Further, in order to provide a portion where the solid electrolyte layer is not formed, a shielding member that is an independent member from the battery electrode and inhibits electrophoresis of the constituent material to a predetermined portion on the surface of the battery electrode. It is preferable to have.
[0013]
Moreover, it is preferable that the particle diameter of the said constituent material is 50 micrometers or less. This is because if the particle diameter is 50 μm or less, a solid electrolyte layer having lower ion conductivity is obtained even if the porosity is the same.
[0014]
Further, in order to control the surface potential of the constituent material, the solution preferably contains a charging agent that charges the surface of the constituent material.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
The manufacturing method of the battery electrode with a solid electrolyte layer of this embodiment consists of an immersion process and an electrophoresis process.
[0016]
[Battery electrode]
The “battery electrode” to which this production method can be applied may be used in any battery, and ensures ion mobility between the electrodes between the positive electrode and the negative electrode and the counter electrode. It is a battery electrode used for a battery in which a battery is formed with a solid electrolyte interposed. For example, a lithium ion secondary battery is illustrated. In addition to a general battery, it also includes an electrode such as an electric double layer capacitor. As used herein, the term “solid electrolyte” does not mean only an electrolyte composed purely of solid, but an electrolyte holding a liquid inside like a sol / gel. Also good.
[0017]
[Immersion process]
The dipping step is a step of dipping the battery electrode in a solution in which the constituent material constituting the solid electrolyte layer is dispersed in a solvent. In this dipping process, the battery electrode may be dipped into the solution continuously as well as the whole.
[0018]
It is desirable that the constituent materials have a particle size of 50 μm or less, particularly 1 μm or less so that they are well dispersed in the solution. Moreover, it is preferable to make the particle size distribution broader because the pore diameter can be reduced and the resistance can be reduced. Further, the constituent material can be used by being dissolved in a solvent in addition to being dispersed in a solution.
[0019]
The appropriate content ratio of the constituent materials in the solution varies greatly depending on the solvent used, the conditions of the electrophoresis step, and the like. This is because the constituent material is not uniformly attached to the surface of the battery electrode by the electrophoresis process described later, but the state of attachment is different because the moving speed in the solution is different due to changes in the charge, mass, etc. of the constituent material. Because it is different. The charge of the constituent material is also affected by the solvent used, the solution temperature, and the charging agent.
[0020]
The constituent material of the solid electrolyte layer is a material in which ions used in a battery such as Li can be doped and moved. For example, polymer materials such as conductive polymers such as polyethylene oxide, polypropylene oxide, polyacrylonitrile, polymethylolsiloxane, polymethyl methacrylate, and polyvinylidene fluoride, and modified products thereof (copolymerization, branched ones, etc.) Or Li doping or migration of one or more compounds selected from lithium iodide, lithium nitride, lithium phosphate titanate, lithium zirconia phosphate, lithium aluminum nitride, oxide glass, and sulfide glass An inorganic electrolyte is desirable.
[0021]
Moreover, even if it is substances other than the constituent material of a solid electrolyte layer, it can be mixed as needed.
[0022]
When the constituent material is dispersed in the form of powder and dispersed in the solution, as the solvent, organic solvents such as ketones such as acetone and alcohols such as ethanol, water, and a mixed solvent thereof can be used. Further, by adding a solvent that swells and dissolves the constituent material, the constituent material can be swollen, and the floating and sedimentation of particles in the solution can be reduced. If a stable dispersion system cannot be obtained because the particles are large or the specific gravity is significantly different from that of the solvent, the particles may be physically dispersed with a stirrer or ultrasonic wave.
[0023]
At this time, in order to impart a charge to the constituent material which is a dispersoid, a charging agent capable of imparting a charge to particles such as iodine or a surfactant may be added. Further, the constituent material can be stably dispersed in the solvent or the charge of the constituent material can be controlled by adjusting the pH in the solvent. Although it does not limit as pH, 3-12 are especially desirable.
[0024]
Since the dispersion stability of such constituent materials is easily affected by the temperature of the solution, it is preferable to adjust the temperature of the solution. Although it does not limit as temperature in a tank, -10-50 degreeC is especially desirable. For example, the temperature adjustment method can be achieved by circulating a heat medium such as cooling water in a tank holding the solution.
[0025]
[Electrophoresis step]
The electrophoresis step is a step in which the constituent material of the solid electrolyte layer is electrophoresed in the solution by generating a potential gradient in the solution and adhered to the surface of the battery electrode. In this electrophoresis step, it is preferable to use a shielding member that is disposed independently of the battery electrode that hinders the electrophoresis of the constituent material of the solid electrolyte layer to a predetermined site on the surface of the battery electrode. For example, the portion where the solid electrolyte layer is formed can be controlled by disposing a shielding member in the portion where the current collecting lead or the like is formed.
[0026]
A method for generating a potential gradient in the solution can be achieved, for example, by applying a voltage to two opposing electrophoresis electrodes. The shape of the electrode for electrophoresis is preferably a shape in which the potential gradient of the portion through which the battery electrode passes in the solution can be made constant so that the constituent material uniformly adheres to the surface of the battery electrode. For example, the size of the electrophoresis electrode is set to be large enough to cover a portion through which the battery electrode passes. And either one of the electrodes for electrophoresis can serve as the battery electrode immersed in the solution. By using the battery electrode as an electrophoresis electrode, the constituent material can be directly attached to the battery electrode. The direction of the potential gradient generated in the solution is determined by the charging potential in the solution of the constituent material or the like. That is, the potential gradient is determined so that the charged constituent material moves in the direction of the battery electrode. For example, when the constituent material is positively charged, the battery electrode is the negative electrode. Further, the number of electrophoresis electrodes is not limited to two, and may be three or more as necessary. For example, when it is desired to form a solid electrolyte layer on both surfaces of a battery electrode, the battery electrode is used as a positive electrode, and two negative electrodes are provided on both surfaces of the battery electrode so that a constituent material is attached to both surfaces of the battery electrode. A layer can be formed.
[0027]
The conditions such as the voltage applied to the electrophoresis electrode and the voltage application time are not particularly limited, and are appropriately selected according to the thickness, porosity, composition, etc. of the solid electrolyte layer to be formed on the surface of the battery electrode. . If the voltage is increased, the solid electrolyte layer becomes tighter and the porosity is reduced. When the iodine-added acetone solution is used as a solvent, a preferable applied voltage is about 5 to 1000 V, more preferably about 10 to 500 V. Moreover, if the time for applying the voltage is increased, the solid electrolyte layer on the surface of the battery electrode becomes thicker. In addition to the constituent materials, substances dispersed in a solvent have different surface potentials in the solution and have different electrophoresis speeds depending on their properties, so the voltage applied to the electrode for electrophoresis is different from the target solid electrolyte layer composition / structure. Adjust so that The thickness of the solid electrolyte layer formed on the surface of the battery electrode is preferably 50 μm or less, more preferably 25 μm or less, and even more preferably 10 μm or less per side of the battery electrode. This is because the thinner the solid electrolyte layer, the lower the internal resistance of the battery and the higher output battery can be provided. Such a thin solid electrolyte layer is difficult to form with high accuracy by a conventional solvent casting method or the like. On the other hand, according to the electrophoresis method, since the constituent material adheres preferentially to the portion where the potential gradient is large, if the thickness of the solid electrolyte layer is uneven, the constituent material adheres from the thin portion of the solid electrolyte layer. There is an advantage that the thickness of the solid electrolyte layer formed is constant.
[0028]
The shielding member is provided in the vicinity of a portion where the solid electrolyte layer of the battery electrode is not desired to be formed. The smaller the gap between the shielding member and the battery electrode, the less the wraparound of the constituent material of the solid electrolyte layer into unnecessary portions. Further, the shielding member is preferably adjusted to be closer to the potential of the electrophoresis electrode on the side where the constituent material moves than the potential of the electrophoresis electrode opposite to the side on which the constituent material moves. Furthermore, the shielding member is more preferably adjusted to the same potential as the battery electrode. This is because, by adjusting the potential, the potential gradient is reduced in the gap between the shielding member and the battery electrode, so that the adhesion of the solid electrolyte layer to the battery electrode is reduced. The shielding member can be an insulator. By making the shielding member an insulator, the amount of active material adhering to the shielding member is preferable because waste of material is reduced.
[0029]
Moreover, it is preferable to continue stirring of the solution by some method so that the constituent materials in the solution do not precipitate in the electrophoresis step.
[0030]
【Example】
The present invention will be described in detail below based on examples, but the present invention is not limited to the following examples.
[0031]
(Manufacture of battery electrodes)
Collection of positive electrode mixture paste for lithium ion secondary batteries consisting of vinylidene fluoride-hexafluoropropylene copolymer (binder) dissolved in NMP, lithium nickelate (positive electrode active material), and ghetjen black (conductive material) A
[0032]
Next, a negative electrode mixture paste for a lithium ion secondary battery made of vinylidene fluoride-hexafluoropropylene copolymer (binder) and graphite (negative electrode active material) dissolved in NMP is applied to a copper foil as a current collector. The
[0033]
The following examples will be described using these positive and negative electrodes.
[0034]
(Production device for battery electrode with solid electrolyte layer)
A battery electrode with a solid electrolyte layer was manufactured using the apparatus for manufacturing a battery electrode with a solid electrolyte layer shown in FIG. The manufacturing apparatus includes a feeding means 1 for holding and sending
[0035]
Therefore, as shown in FIG. 2, the constituent material of the solid electrolyte that has been electrophoresed from the
[0036]
The
[0037]
Example 1
(Preparation of polymer dispersion in electrophoresis tank)
10 g of a vinylidene fluoride-
[0038]
[Production of polymer film on electrode]
As the battery electrode, the
[0039]
[Production of gel electrolyte battery]
The polymer film was laminated between a positive electrode and a negative electrode, wound, and then inserted into a battery can. Thereafter, the battery is impregnated with an ethylene carbonate / propylene carbonate electrolyte solution in which LiPF 6 is dissolved, and a vinylidene fluoride-hexafluoropropylene copolymer in the positive electrode, the negative electrode, and the polymer film is swollen to produce an all-gel electrolyte battery. did.
[0040]
(Example 2)
(Preparation of polymer dispersion in electrophoresis tank)
10 g of a vinylidene fluoride-
[0041]
[Production of polymer film on electrode]
The
[0042]
Next, a positive terminal was connected to the
[0043]
As shown in FIG. 4, as a result of observing the cross-sectional structure by superimposing and heating the
[0044]
[Production of gel electrolyte battery]
The polymer film was laminated between a positive electrode and a negative electrode, wound, and then inserted into a battery can. Thereafter, the battery is impregnated with an ethylene carbonate / propylene carbonate electrolyte solution in which LiPF 6 is dissolved, and a vinylidene fluoride-hexafluoropropylene copolymer in the positive electrode, the negative electrode, and the polymer film is swollen to produce an all-gel electrolyte battery. did.
[0045]
(Comparative example)
(Production of polymer film)
A 10% vinylidene fluoride-hexafluoropropylene copolymer solution dissolved in NMP was applied onto a polyester film and dried to obtain a polymer film. As a result of the cross-sectional structure observation, as shown in FIG. 5, the
[0046]
[Production of gel electrolyte battery]
The polymer film was laminated between a positive electrode and a negative electrode, wound, and then inserted into a battery can. Thereafter, the battery is impregnated with an ethylene carbonate / propylene carbonate electrolyte solution in which LiPF 6 is dissolved, and a vinylidene fluoride-hexafluoropropylene copolymer in the positive electrode, the negative electrode, and the polymer film is swollen to produce an all-gel electrolyte battery. did.
[0047]
[Measurement of internal resistance]
The internal resistances of the batteries of Example 1, Example 2, and Comparative Example were measured. As a result, when the internal resistance of the comparative example was 1.0, it was 0.9 and 0.8 in Example 1 and Example 2, respectively.
[0048]
As described above, according to the manufacturing method of the present invention, the thin solid electrolyte layer that is strongly bonded to the battery electrode is integrated with the surface of the battery electrode without being affected by the surface state, porosity, etc. of the battery electrode. There is an advantage that it can be formed. In addition, there is an advantage that a battery electrode with a solid electrolyte layer can be produced in a small number of steps and in a short time without passing through a step such as a deposition step after applying a polymer solution such as a solvent casting method. In addition, since the solid electrolyte layer can be made thinner than the conventional one, there is an advantage that a low internal resistance of the battery can be provided.
[0049]
【The invention's effect】
As described above, according to the manufacturing method of the present invention, it is possible to provide a method for manufacturing a battery electrode with a solid electrolyte layer for the purpose of realizing a secondary battery having high safety, low cost, and high output. Have
[Brief description of the drawings]
FIG. 1 is a schematic view of a production apparatus used in Examples.
FIG. 2 is a view showing a state of arrangement of an electrode plate and a shielding member of a manufacturing apparatus used in an example.
3 is a schematic cross-sectional view of the battery electrode of Example 1. FIG.
4 is a schematic cross-sectional view of a battery electrode of Example 2. FIG.
FIG. 5 is a schematic cross-sectional view of a battery electrode of a comparative example.
[Explanation of symbols]
DESCRIPTION OF
A ... Battery electrode (solid electrolyte layer forming part) B ... Battery electrode (solid electrolyte layer non-formed part) 2 ...
Claims (5)
前記固体電解質層を構成する構成材料を溶媒中に分散ないし溶解させた溶液中に前記電池用電極を浸漬する浸漬工程と、
電気泳動用電極を用いて前記溶液内に電位勾配を発生させて前記構成材料を電気泳動により前記電池用電極表面に付着させる電気泳動工程と、
を有し、
前記浸漬工程において、前記電池用電極は、ロール状に巻回された前記電池用電極を保持し送出する送出手段により前記溶液中に送出され、前記溶液を通過後、前記電池用電極を巻き取る取込手段により巻き取られ、
前記電気泳動用電極は、前記溶液内で前記電池用電極が通過する部分を覆うことを特徴とする固体電解質層付き電池用電極の製造方法。A method for producing a battery electrode with a solid electrolyte layer, comprising: a battery electrode; and a solid electrolyte layer formed integrally with the battery electrode and enabling ion transfer between the battery electrodes,
An immersion step of immersing the battery electrode in a solution in which a constituent material constituting the solid electrolyte layer is dispersed or dissolved in a solvent;
An electrophoresis step of generating a potential gradient in the solution using an electrophoresis electrode and attaching the constituent material to the surface of the battery electrode by electrophoresis ;
Have,
In the dipping step, the battery electrode is fed into the solution by a feeding means that holds and sends the battery electrode wound in a roll shape, and after passing through the solution, winds up the battery electrode. Rolled up by the take-in means,
The method for producing a battery electrode with a solid electrolyte layer , wherein the electrode for electrophoresis covers a portion of the solution through which the battery electrode passes .
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| WO2002067355A1 (en) * | 2001-02-22 | 2002-08-29 | Matsushita Electric Industrial Co., Ltd. | Lithium polymer cell |
| FR2982082B1 (en) * | 2011-11-02 | 2013-11-22 | Fabien Gaben | PROCESS FOR PRODUCING THIN-FILT THIN-FILTER BATTERIES |
| FR2982086B1 (en) | 2011-11-02 | 2013-11-22 | Fabien Gaben | METHOD FOR MANUFACTURING MICRO-BATTERIES IN THIN LITHIUM ION LAYERS, AND MICRO-BATTERIES OBTAINED THEREBY |
| FR2981952B1 (en) | 2011-11-02 | 2015-01-02 | Fabien Gaben | PROCESS FOR MAKING THIN FILMS DENSED BY ELECTROPHORESIS |
| FR2982083B1 (en) * | 2011-11-02 | 2014-06-27 | Fabien Gaben | METHOD FOR PRODUCING SOLID ELECTROLYTE THIN FILMS FOR LITHIUM ION BATTERIES |
| FR3000616B1 (en) * | 2012-12-31 | 2015-01-02 | I Ten | PROCESS FOR MANUFACTURING SOLID BATTERIES IN MULTILAYER STRUCTURE |
| CN104852084B (en) * | 2015-04-07 | 2017-03-01 | 长江大学 | A kind of preparation method of lithium ion battery polymer electrolyte |
| FR3080952B1 (en) | 2018-05-07 | 2020-07-17 | I-Ten | ELECTROLYTE FOR THIN FILM ELECTROCHEMICAL DEVICES |
| FR3080957B1 (en) | 2018-05-07 | 2020-07-10 | I-Ten | MESOPOROUS ELECTRODES FOR THIN FILM ELECTROCHEMICAL DEVICES |
| FR3080945A1 (en) | 2018-05-07 | 2019-11-08 | I-Ten | MESOPOROUS ELECTROLYTES FOR THIN-FILM ELECTROCHEMICAL DEVICES |
| CN112514108B (en) * | 2018-08-16 | 2024-07-30 | 株式会社Lg新能源 | Method of manufacturing negative electrode for lithium secondary battery and negative electrode for lithium secondary battery manufactured using the same |
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