JP2015133188A - Apparatus for producing electrode layer - Google Patents
Apparatus for producing electrode layer Download PDFInfo
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- JP2015133188A JP2015133188A JP2014002804A JP2014002804A JP2015133188A JP 2015133188 A JP2015133188 A JP 2015133188A JP 2014002804 A JP2014002804 A JP 2014002804A JP 2014002804 A JP2014002804 A JP 2014002804A JP 2015133188 A JP2015133188 A JP 2015133188A
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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
- 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
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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
- 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
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Abstract
Description
本発明は、電極層の製造装置に関するものである。 The present invention relates to an electrode layer manufacturing apparatus.
燃料電池は、電解質膜とこれを挟持する一対の触媒層と、これら一対の触媒層を挟持する一対のガス拡散層と、これら一対のガス拡散層を挟持する一対のセパレータとを備える。
上記一対の触媒層は、一対の電極層であるカソードおよびアノードである。これら一対の触媒層はいずれも、触媒担体と触媒担体に担持された触媒とを含む。ここで、触媒担体としてはカーボンが一般に用いられ、触媒担体に担持される触媒としては白金等が好ましく用いられる。
上記触媒層は例えば、電解質膜あるいはガス拡散層を電極基材とし、その表面に触媒層の材料を含む塗料を塗工して塗膜を形成し、これを乾燥することで、製造される（特許文献１等）。
二次電池の活物質層も同様に、金属箔等の集電体を電極基材とし、その表面に活物質層の材料を含む塗料を塗工して塗膜を形成し、これを乾燥することで、製造される。二次電池の活物質層において、活物質としてカーボンが用いられることがある。
本明細書では、燃料電池の触媒層および二次電池の活物質層等を含めて、「電極層」と言う。
The fuel cell includes an electrolyte membrane, a pair of catalyst layers that sandwich the electrolyte membrane, a pair of gas diffusion layers that sandwich the pair of catalyst layers, and a pair of separators that sandwich the pair of gas diffusion layers.
The pair of catalyst layers is a cathode and an anode which are a pair of electrode layers. Each of the pair of catalyst layers includes a catalyst carrier and a catalyst supported on the catalyst carrier. Here, carbon is generally used as the catalyst carrier, and platinum or the like is preferably used as the catalyst supported on the catalyst carrier.
The catalyst layer is produced, for example, by using an electrolyte membrane or a gas diffusion layer as an electrode base material, coating the surface thereof with a paint containing the material of the catalyst layer to form a coating film, and drying the coating film ( Patent Document 1).
Similarly, for the active material layer of the secondary battery, a current collector such as a metal foil is used as an electrode base material, and a paint containing the material of the active material layer is applied to the surface to form a coating film, which is then dried. With that, it is manufactured. In the active material layer of the secondary battery, carbon may be used as the active material.
In this specification, a catalyst layer of a fuel cell, an active material layer of a secondary battery, and the like are referred to as an “electrode layer”.
カーボンを含む電極層の製造方法においては、塗膜の乾燥過程でカーボンの凝集が起こり、乾燥工程後に得られる電極層に、断面視において、電極層の下面から上面に柱状に延びるカーボン凝集部が形成されることがある（後記比較例１を参照）。かかる電極層では、断面視において、互いに隣接するカーボン凝集部の間に電極層の下面から上面に渡る空隙部が見られる（後記比較例１を参照）。かかる現象は、特に高速乾燥時に生じやすい。
電極層に上記のような空隙部があると、空隙部への応力集中により電極層のひび割れが起こりやすくなる。電極層のひび割れは、これが搭載される電池の耐久性低下あるいは出力低下等の要因となり得る。
In the method for producing an electrode layer containing carbon, carbon agglomeration occurs during the drying process of the coating film, and in the electrode layer obtained after the drying process, a carbon agglomerated portion extending in a columnar shape from the lower surface to the upper surface of the electrode layer in a cross-sectional view It may be formed (see Comparative Example 1 below). In such an electrode layer, in a cross-sectional view, a gap portion extending from the lower surface to the upper surface of the electrode layer is seen between adjacent carbon aggregate portions (see Comparative Example 1 described later). Such a phenomenon is particularly likely to occur during high speed drying.
If the electrode layer has such a gap, cracking of the electrode layer is likely to occur due to stress concentration in the gap. Cracks in the electrode layer can cause factors such as a decrease in durability or a decrease in output of a battery in which the electrode layer is mounted.
本発明は上記事情に鑑みてなされたものであり、乾燥工程におけるカーボンの凝集を抑制することが可能な電極層の製造装置を提供することを目的とするものである。 This invention is made | formed in view of the said situation, and it aims at providing the manufacturing apparatus of the electrode layer which can suppress aggregation of the carbon in a drying process.
本発明の電極層の製造装置は、
電極基材の表面にカーボンを含む塗膜を形成する塗工装置と、前記塗膜を乾燥して電極層とする乾燥装置とを備えた電極層の製造装置であって、
乾燥中の前記電極基材を振動する振動手段を備えたものである。
The electrode layer manufacturing apparatus of the present invention comprises:
An electrode layer manufacturing apparatus comprising: a coating apparatus that forms a coating film containing carbon on the surface of an electrode substrate; and a drying apparatus that dries the coating film to form an electrode layer,
A vibration means for vibrating the electrode base material during drying is provided.
本発明によれば、乾燥工程におけるカーボンの凝集を抑制することが可能な電極層の製造装置を提供することができる。 ADVANTAGE OF THE INVENTION According to this invention, the manufacturing apparatus of the electrode layer which can suppress the aggregation of carbon in a drying process can be provided.
「燃料電池」
図面を参照して、燃料電池の概略構成について説明する。
図１は、燃料電池の模式断面図である。
"Fuel cell"
A schematic configuration of a fuel cell will be described with reference to the drawings.
FIG. 1 is a schematic cross-sectional view of a fuel cell.
燃料電池１００は、電解質膜１１０とこれを挟持する一対の触媒層と、これら一対の触媒層を挟持する一対のガス拡散層１６０、１７０と、これら一対のガス拡散層１６０、１７０を挟持する一対のセパレータ１８０、１９０とを備える。
上記一対の触媒層は、一対の電極層であるカソード１２０およびアノード１３０である。これら一対の触媒層はいずれも、触媒担体と触媒担体に担持された触媒とを含む。ここで、触媒担体としてはカーボンが一般に用いられ、触媒担体に担持される触媒としては白金等が好ましく用いられる。
燃料電池１００において、カソード１２０側には、酸化ガスとしての空気が供給され、アノード１３０側には、燃料ガスとしての水素が供給される。
The fuel cell 100 includes an electrolyte membrane 110, a pair of catalyst layers sandwiching the electrolyte membrane 110, a pair of gas diffusion layers 160, 170 sandwiching the pair of catalyst layers, and a pair sandwiching the pair of gas diffusion layers 160, 170. Separators 180 and 190.
The pair of catalyst layers is a cathode 120 and an anode 130 which are a pair of electrode layers. Each of the pair of catalyst layers includes a catalyst carrier and a catalyst supported on the catalyst carrier. Here, carbon is generally used as the catalyst carrier, and platinum or the like is preferably used as the catalyst supported on the catalyst carrier.
In the fuel cell 100, air as an oxidizing gas is supplied to the cathode 120 side, and hydrogen as a fuel gas is supplied to the anode 130 side.
電解質膜１１０は例えば、パーフルオロスルホン酸等からなるプロトン伝導性のイオン交換膜である。 The electrolyte membrane 110 is, for example, a proton conductive ion exchange membrane made of perfluorosulfonic acid or the like.
ガス拡散層１６０、１７０は、導電性を有する多孔質部材である。
ガス拡散層１６０、１７０は例えば、カーボンクロスおよびカーボンペーパ等のカーボン多孔質体、あるいは、金属メッシュおよび発砲金属等の金属多孔質体等からなる。
The gas diffusion layers 160 and 170 are conductive porous members.
The gas diffusion layers 160 and 170 are made of, for example, a carbon porous body such as carbon cloth and carbon paper, or a metal porous body such as a metal mesh and a foam metal.
セパレータ１８０、１９０は、ガス不透過の導電性部材からなる。
セパレータ１８０、１９０は例えば、カーボンを圧縮してガス不透過とした緻密質カーボン、あるいはプレス成形された金属板等からなる。
セパレータ１８０は片面（図示左面）に複数の凹部が形成されており、これら複数の凹部によって、セパレータ１８０とガス拡散層１６０との間に、ガス拡散層１６０に酸化ガスとしての空気を供給するための酸化ガス供給流路１４０が形成されている。
セパレータ１９０は片面（図示右面）に複数の凹部が形成されており、これら複数の凹部によって、セパレータ１９０とガス拡散層１７０との間に、ガス拡散層１７０に燃料ガスとしての水素ガスを供給するための燃料ガス供給流路１５０が形成されている。
Separator 180, 190 consists of a gas impermeable conductive member.
The separators 180 and 190 are made of, for example, dense carbon that has been made to be gas-impermeable by compressing carbon, or a press-molded metal plate.
The separator 180 has a plurality of recesses formed on one side (the left side in the drawing), and the plurality of recesses supplies air as an oxidizing gas to the gas diffusion layer 160 between the separator 180 and the gas diffusion layer 160. The oxidizing gas supply flow path 140 is formed.
The separator 190 has a plurality of recesses formed on one side (the right side in the drawing), and hydrogen gas as a fuel gas is supplied to the gas diffusion layer 170 between the separator 190 and the gas diffusion layer 170 by the plurality of recesses. A fuel gas supply flow path 150 is formed.
燃料電池１００の外周部には、酸化ガス供給流路１４０および燃料ガス供給流路１５０におけるガスシール性を確保するための図示しないシール部材が配設されている。 On the outer periphery of the fuel cell 100, a seal member (not shown) for ensuring gas sealing performance in the oxidizing gas supply channel 140 and the fuel gas supply channel 150 is disposed.
本実施形態において、カソード１２０は、電解質膜１１０あるいはガス拡散層１６０を電極基材とし、その表面に触媒層の材料を含む塗料を塗工して塗膜を形成し、これを乾燥することで、製造される。
同様に、アノード１３０は、電解質膜１１０あるいはガス拡散層１７０を電極基材とし、その表面に触媒層の材料を含む塗料を塗工して塗膜を形成し、これを乾燥することで、製造される。
In the present embodiment, the cathode 120 uses the electrolyte membrane 110 or the gas diffusion layer 160 as an electrode base material, forms a coating film on the surface thereof by applying a paint containing the material of the catalyst layer, and then dries it. Manufactured.
Similarly, the anode 130 is manufactured by using the electrolyte membrane 110 or the gas diffusion layer 170 as an electrode base material, coating the surface thereof with a paint containing the material of the catalyst layer to form a coating film, and drying the coating film. Is done.
二次電池の活物質層も同様に、金属箔等の集電体を電極基材とし、その表面に活物質層の材料を含む塗料を塗工して塗膜を形成し、これを乾燥することで、製造される。二次電池の活物質層において、活物質としてカーボンが用いられることがある。 Similarly, for the active material layer of the secondary battery, a current collector such as a metal foil is used as an electrode base material, and a paint containing the material of the active material layer is applied to the surface to form a coating film, which is then dried. With that, it is manufactured. In the active material layer of the secondary battery, carbon may be used as the active material.
「電極層の製造装置」
図面を参照して、本発明に係る一実施形態の電極層の製造装置とこれを用いた電極層の製造方法について説明する。
図２は、本実施形態の電極層の製造装置の模式斜視図である。この図は、電極層を製造している様子を示している。
"Electrode layer manufacturing equipment"
An electrode layer manufacturing apparatus and an electrode layer manufacturing method using the same according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 2 is a schematic perspective view of the electrode layer manufacturing apparatus of the present embodiment. This figure shows how the electrode layer is manufactured.
本実施形態の電極層の製造装置１は、
帯状の電極基材１１を送り出す送出しローラ２０と、
電極基材１１の表面にカーボンを含む塗膜１２を形成する塗工装置３０と、
塗膜１２を乾燥して電極層１３とする乾燥装置４０と、
電極層１３が形成された電極基材１１を巻き取る巻取りローラ５１とを備えている。
塗工装置３０は、塗工ダイ等である。
乾燥装置４０は、乾燥炉等である。
図中、乾燥装置４０内は透視図で図示してある。
The electrode layer manufacturing apparatus 1 of the present embodiment includes:
A feed roller 20 for feeding the belt-shaped electrode substrate 11;
A coating apparatus 30 for forming a coating film 12 containing carbon on the surface of the electrode substrate 11;
A drying device 40 for drying the coating film 12 to form the electrode layer 13;
And a winding roller 51 for winding the electrode substrate 11 on which the electrode layer 13 is formed.
The coating device 30 is a coating die or the like.
The drying device 40 is a drying furnace or the like.
In the drawing, the inside of the drying device 40 is shown in a perspective view.
電極層の製造装置１には、必要に応じて、単数または複数の搬送用ローラが設けられる。
図示する例では、搬送用ローラ６１〜６３が設けられている。
搬送用ローラ６１は、塗工装置３０の下方に設けられ、塗膜１２の形成時に電極基材１１を下方から支持する支持部材を兼ねている。
搬送用ローラ６１、６２は、乾燥装置４０と巻取りローラ５１との間に設けられている。搬送用ローラ６１と搬送用ローラ６２とは、電極基材１１を挟んで互いに対向配置されている。
The electrode layer manufacturing apparatus 1 is provided with one or a plurality of conveying rollers as required.
In the illustrated example, conveyance rollers 61 to 63 are provided.
The conveyance roller 61 is provided below the coating apparatus 30 and also serves as a support member that supports the electrode substrate 11 from below when the coating film 12 is formed.
The conveying rollers 61 and 62 are provided between the drying device 40 and the winding roller 51. The transport roller 61 and the transport roller 62 are disposed to face each other with the electrode base material 11 interposed therebetween.
電極層１３が上記の燃料電池１００のカソード１２０である場合、電極基材１１は電解質膜１１０あるいはガス拡散層１６０である。
電極層１３が上記の燃料電池１００のアノード１３０である場合、電極基材１１は電解質膜１１０あるいはガス拡散層１７０である。
電極層１３が二次電池の活物質層である場合、電極基材１１は金属箔等の集電体である。
When the electrode layer 13 is the cathode 120 of the fuel cell 100 described above, the electrode substrate 11 is the electrolyte membrane 110 or the gas diffusion layer 160.
When the electrode layer 13 is the anode 130 of the fuel cell 100 described above, the electrode substrate 11 is the electrolyte membrane 110 or the gas diffusion layer 170.
When the electrode layer 13 is an active material layer of a secondary battery, the electrode substrate 11 is a current collector such as a metal foil.
本実施形態の電極層の製造装置１は、乾燥中の電極基材１１を振動する振動手段を備えている。振動手段による電極基材１１の振動方向は特に制限なく、電極基材１１の幅方向が好ましい。振動手段はまた、電極基材１１に物理的に接触して電極基材１１を振動させる振動部材を含むことが好ましい。 The electrode layer manufacturing apparatus 1 according to this embodiment includes a vibrating unit that vibrates the electrode substrate 11 being dried. The vibration direction of the electrode base material 11 by the vibration means is not particularly limited, and the width direction of the electrode base material 11 is preferable. It is preferable that the vibrating means also includes a vibrating member that physically contacts the electrode substrate 11 and vibrates the electrode substrate 11.
本実施形態の電極層の製造装置１は、巻取りローラ５１およびこれを電極基材１１の幅方向に振動させる振動装置（図示略）とを含む振動手段５０を備えている。
振動装置によって巻取りローラ５１が電極基材１１の幅方向に振動され、この巻取りローラ５１の振動によって巻取りローラ５１に物理的に接触する電極基材１１が幅方向に振動される。
巻取りローラ５１の振動は、乾燥装置４０と巻取りローラ５１との間の電極基材１１のみならず、乾燥装置４０内の電極基材１１にも伝搬する。すなわち、振動手段５０によって、乾燥装置４０内の電極基材１１が振動される。
The electrode layer manufacturing apparatus 1 according to the present embodiment includes a vibrating means 50 including a winding roller 51 and a vibrating device (not shown) that vibrates the winding roller 51 in the width direction of the electrode substrate 11.
The winding roller 51 is vibrated in the width direction of the electrode base material 11 by the vibration device, and the electrode base material 11 physically contacting the winding roller 51 is vibrated in the width direction by the vibration of the winding roller 51.
The vibration of the winding roller 51 propagates not only to the electrode substrate 11 between the drying device 40 and the winding roller 51 but also to the electrode substrate 11 in the drying device 40. That is, the electrode substrate 11 in the drying device 40 is vibrated by the vibration means 50.
図３に示す設計変更例の電極層の製造装置２のように、振動手段５０の代わりに、搬送用ローラ６１、６２およびこれらを電極基材１１の幅方向に振動させる振動装置（図示略）とを含む振動手段６０を設けてもよい。
この場合も、振動装置によって搬送用ローラ６１、６２が電極基材１１の幅方向に振動され、これら搬送用ローラ６１、６２の振動によって搬送用ローラ６１、６２に物理的に接触する電極基材１１が幅方向に振動される。
搬送用ローラ６１、６２の振動は、乾燥装置４０と搬送用ローラ６１、６２との間の電極基材１１のみならず、乾燥装置４０内の電極基材１１にも伝搬する。すなわち、振動手段６０によって、乾燥装置４０内の電極基材１１が振動される。
As in the electrode layer manufacturing apparatus 2 of the design modification example shown in FIG. 3, instead of the vibration means 50, the conveying rollers 61 and 62 and a vibration device (not shown) that vibrates them in the width direction of the electrode substrate 11. The vibration means 60 containing these may be provided.
Also in this case, the conveying rollers 61 and 62 are vibrated in the width direction of the electrode base material 11 by the vibration device, and the electrode base material that physically contacts the conveying rollers 61 and 62 by the vibration of the conveying rollers 61 and 62 is provided. 11 is vibrated in the width direction.
The vibration of the transport rollers 61 and 62 propagates not only to the electrode base material 11 between the drying device 40 and the transport rollers 61 and 62 but also to the electrode base material 11 in the drying device 40. That is, the electrode substrate 11 in the drying device 40 is vibrated by the vibrating means 60.
振動手段５０または６０による振動強度は、乾燥装置４０内の電極基材１１が良好に振動される範囲で設定される。
電極基材１１は乾燥初期から振動が付与されることが好ましい。すなわち、乾燥装置４０内の電極基材１１が全体的に振動されることが好ましい。
振動手段５０または６０によって乾燥装置４０内の電極基材１１に付与される振動は例えば、１〜１０Ｈｚ程度の微小振動でよい。この場合、乾燥装置４０内の電極基材１１の振幅は０．５〜１０ｍｍ程度である。
The vibration intensity by the vibration means 50 or 60 is set within a range in which the electrode substrate 11 in the drying device 40 is vibrated satisfactorily.
It is preferable that vibration is applied to the electrode substrate 11 from the beginning of drying. That is, it is preferable that the electrode base material 11 in the drying device 40 is vibrated as a whole.
The vibration applied to the electrode substrate 11 in the drying device 40 by the vibration means 50 or 60 may be a minute vibration of about 1 to 10 Hz, for example. In this case, the amplitude of the electrode substrate 11 in the drying device 40 is about 0.5 to 10 mm.
振動手段５０または６０によって乾燥中の電極基材１１を振動することで、塗膜１２中でカーボンが凝集することを抑制でき、カーボン凝集部のないまたは少ない略均一な電極層１３を製造できる。 By vibrating the electrode substrate 11 being dried by the vibrating means 50 or 60, it is possible to suppress the aggregation of carbon in the coating film 12, and it is possible to produce a substantially uniform electrode layer 13 with or without a carbon aggregation portion.
図５は、振動手段を備えていない従来の製造装置を用いて製造された電極層のＳＥＭ表面写真の例とその断面模式図である（比較例１）。なお、断面模式図では、電極基材を薄く図示してある（図４も同様）。
図中、符号２１１は電極基材、符号２１３は従来の電極層、符号Ｃはカーボン粒子、符号ＣＸはカーボン凝集部、符号Ｓは空隙部である。
比較例１の電極層２１３には、断面視において、電極層２１３の下面から上面に柱状に延びるカーボン凝集部ＣＸが見られた。図５のＳＥＭ写真において、白く隔壁のように見える部分がカーボン凝集部ＣＸである。電極層２１３の全体に渡って、カーボン凝集部ＣＸが網目状に広がっている様子が見られた。
断面視において、互いに隣接するカーボン凝集部ＣＸの間に空隙部Ｓが見られた。図５のＳＥＭ写真において、黒く見える部分が空隙部Ｓである。個々の空隙部Ｓは断面視で電極層２１３の下面から上面に渡っており、電極層２１３の全体に渡ってドット状に多数の空隙部Ｓが広がっている様子が見られた。このような空隙部Ｓがあると、空隙部Ｓへの応力集中により電極層２１３のひび割れが起こりやすくなる。
FIG. 5 is an example of an SEM surface photograph of an electrode layer manufactured using a conventional manufacturing apparatus not provided with a vibrating means and a schematic cross-sectional view thereof (Comparative Example 1). In the schematic cross-sectional view, the electrode base material is shown thin (the same applies to FIG. 4).
In the figure, reference numeral 211 denotes an electrode base material, reference numeral 213 denotes a conventional electrode layer, reference numeral C denotes carbon particles, reference numeral CX denotes a carbon agglomerated portion, and reference numeral S denotes a gap portion.
In the electrode layer 213 of Comparative Example 1, carbon aggregated portions CX extending in a columnar shape from the lower surface to the upper surface of the electrode layer 213 were seen in a cross-sectional view. In the SEM photograph of FIG. 5, the white portion that looks like a partition wall is the carbon aggregate portion CX. A state in which the carbon agglomerated portion CX spreads in a mesh shape was observed over the entire electrode layer 213.
In a cross-sectional view, voids S were found between the carbon agglomerates CX adjacent to each other. In the SEM photograph of FIG. 5, the portion that appears black is the void S. The individual voids S extend from the lower surface to the upper surface of the electrode layer 213 in a cross-sectional view, and a large number of voids S spread like dots throughout the entire electrode layer 213. If there is such a void S, the electrode layer 213 is likely to crack due to stress concentration in the void S.
図４は、振動手段５０を備えた本実施形態の製造装置１を用いて製造された電極層のＳＥＭ表面写真の例とその断面模式図である（実施例１）。
図中、符号Ｃはカーボン粒子である。
実施例１の電極層１３には、断面視で、複数のカーボン粒子Ｃが厚み方向に凝集したカーボン凝集部ＣＸが見られなかった。実施例１の電極層１３では、膜全体にカーボン粒子Ｃが良好に分散され、電極層１３の厚み方向に延びた大きな空隙部Ｓは見られなかった。
図４に示すように、乾燥中の電極基材１１を振動することで、塗膜１２中でカーボンが凝集することを抑制でき、カーボン凝集部ＣＸのないまたは少ない略均一な電極層１３を製造できた。この電極層１３では、膜全体にカーボンＣが良好に分散され、厚み方向に延びた大きな空隙部Ｓは見られないので、応力集中が起こりにくく、ひび割れが生じにくい。
FIG. 4 is an example of an SEM surface photograph of an electrode layer manufactured using the manufacturing apparatus 1 of the present embodiment provided with the vibrating means 50 and a schematic cross-sectional view thereof (Example 1).
In the figure, the symbol C is carbon particles.
In the electrode layer 13 of Example 1, the carbon aggregated portion CX in which the plurality of carbon particles C aggregated in the thickness direction was not seen in the cross-sectional view. In the electrode layer 13 of Example 1, the carbon particles C were well dispersed throughout the film, and no large void S extending in the thickness direction of the electrode layer 13 was found.
As shown in FIG. 4, by vibrating the electrode substrate 11 during drying, it is possible to prevent carbon from aggregating in the coating film 12, and to produce a substantially uniform electrode layer 13 with little or no carbon agglomeration CX. did it. In this electrode layer 13, carbon C is well dispersed throughout the film, and a large void S extending in the thickness direction is not seen. Therefore, stress concentration hardly occurs and cracks hardly occur.
なお、電極基材１１を振動させながら、電極層１３が形成された電極基材１１を巻き取ると、巻取りの端部が揃わなくなる恐れがある。その場合、振動付与と振動停止とを繰り返し、振動停止中に電極層１３が形成された電極基材１１を巻き取るようにすればよい。 If the electrode substrate 11 on which the electrode layer 13 is formed is wound while the electrode substrate 11 is vibrated, the winding ends may not be aligned. In that case, the application of vibration and the stop of vibration may be repeated, and the electrode base material 11 on which the electrode layer 13 is formed may be wound during the stop of vibration.
本実施形態では、電極基材１１の片面に塗膜１２を形成し、これを乾燥する場合について説明したが、本発明は、電極基材１１の両面に塗膜１２を形成し、これを乾燥する場合にも適用可能である。 In the present embodiment, the case where the coating film 12 is formed on one side of the electrode base material 11 and dried is described. However, the present invention forms the coating film 12 on both sides of the electrode base material 11 and dries it. It is also applicable to
以上説明したように、本実施形態およびその設計変更例によれば、乾燥工程におけるカーボンの凝集を抑制することが可能な電極層の製造装置１、２を提供することができる。 As described above, according to the present embodiment and the design modification example thereof, it is possible to provide the electrode layer manufacturing apparatuses 1 and 2 that can suppress the aggregation of carbon in the drying process.
本発明の電極層の製造装置は、燃料電池の触媒層および二次電池の活物質層等の電極層の製造に好ましく適用できる。 The electrode layer production apparatus of the present invention can be preferably applied to production of electrode layers such as a catalyst layer of a fuel cell and an active material layer of a secondary battery.
１、２ 電極層の製造装置
１１ 電極基材
１２ 塗膜
１３ 電極層
２０ 送出しローラ
３０ 塗工装置
４０ 乾燥装置
５０ 振動手段
５１ 巻取りローラ
６０ 振動手段
６１、６２ 搬送用ローラ
DESCRIPTION OF SYMBOLS 1, 2 Electrode manufacturing apparatus 11 Electrode base material 12 Coating film 13 Electrode layer 20 Feeding roller 30 Coating device 40 Drying device 50 Vibrating means 51 Winding roller 60 Vibrating means 61 and 62 Conveying rollers
Claims (1)
乾燥中の前記電極基材を振動する振動手段を備えた電極層の製造装置。 An electrode layer manufacturing apparatus comprising: a coating apparatus for forming a coating film containing carbon on a surface of an electrode substrate; and a drying apparatus for drying the coating film to form an electrode layer,
An apparatus for manufacturing an electrode layer, comprising vibration means for vibrating the electrode base material during drying.
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| JP2005144414A (en) * | 2003-11-20 | 2005-06-09 | Toppan Printing Co Ltd | Coating device |
| JP2007234469A (en) * | 2006-03-02 | 2007-09-13 | Toshiba Fuel Cell Power Systems Corp | Electrode for solid polyelectrolyte fuel cell and its process of manufacture |
| JP2009268975A (en) * | 2008-05-08 | 2009-11-19 | Konica Minolta Holdings Inc | Application method of organic compound layer forming coating liquid |
| JP2011129435A (en) * | 2009-12-18 | 2011-06-30 | Toyota Motor Corp | Drying device |
| JP2012057854A (en) * | 2010-09-08 | 2012-03-22 | Toray Eng Co Ltd | Heat drying device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005144414A (en) * | 2003-11-20 | 2005-06-09 | Toppan Printing Co Ltd | Coating device |
| JP2007234469A (en) * | 2006-03-02 | 2007-09-13 | Toshiba Fuel Cell Power Systems Corp | Electrode for solid polyelectrolyte fuel cell and its process of manufacture |
| JP2009268975A (en) * | 2008-05-08 | 2009-11-19 | Konica Minolta Holdings Inc | Application method of organic compound layer forming coating liquid |
| JP2011129435A (en) * | 2009-12-18 | 2011-06-30 | Toyota Motor Corp | Drying device |
| JP2012057854A (en) * | 2010-09-08 | 2012-03-22 | Toray Eng Co Ltd | Heat drying device |
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