JP2008235159A - Fuel cell - Google Patents

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JP2008235159A
JP2008235159A JP2007076377A JP2007076377A JP2008235159A JP 2008235159 A JP2008235159 A JP 2008235159A JP 2007076377 A JP2007076377 A JP 2007076377A JP 2007076377 A JP2007076377 A JP 2007076377A JP 2008235159 A JP2008235159 A JP 2008235159A
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separator
fuel cell
mea
cell
periphery
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Toshihiro Asano
敏浩 浅野
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Toyota Motor Corp
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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
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/008—Disposal or recycling of fuel cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
    • H01M8/0273—Sealing or supporting means around electrodes, matrices or membranes with sealing or supporting means in the form of a frame
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
    • H01M8/241—Grouping of fuel cells, e.g. stacking of fuel cells with solid or matrix-supported electrolytes
    • H01M8/242—Grouping of fuel cells, e.g. stacking of fuel cells with solid or matrix-supported electrolytes comprising framed electrodes or intermediary frame-like gaskets
    • 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
    • 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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/84—Recycling of batteries or fuel cells

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  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Fuel Cell (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fuel cell which can be readily disassembled at low cost while maintaining excellent power generation efficiency. <P>SOLUTION: The fuel cell, in which an MEA which is a membrance-electrode assembly and a separator 21 are layered, includes a cell 11, in which a resin frame 25 in the periphery of the MEA and the periphery of the separator 21 are adhesively fixed, wherein grasp protrusions 25a and 21a, which can be grasped, are placed in the periphery of the separator 21 and the resin frame 25 of the periphery of the MEA, respectively. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、電極の両側にセパレータを配設して構成される燃料電池に関する。   The present invention relates to a fuel cell configured by disposing separators on both sides of an electrode.

近年、燃料ガスと酸化ガスとの電気化学反応によって発電する燃料電池をエネルギ源とした燃料電池自動車等が注目されている。このような燃料電池では、通常、燃料ガスと酸化ガスとの電気化学反応によって発電するセルを所要数積層した燃料電池スタックが用いられることになる。   In recent years, a fuel cell vehicle using a fuel cell that generates power by an electrochemical reaction between a fuel gas and an oxidizing gas as an energy source has attracted attention. In such a fuel cell, a fuel cell stack in which a required number of cells that generate power by an electrochemical reaction between a fuel gas and an oxidizing gas are usually stacked is used.

セルは、電解質膜及びその両側に配置された一対の電極を有する膜−電極接合体であるＭＥＡ（Ｍｅｍｂｒａｎｃｅ Ｅｌｅｃｔｒｏｄｅ Ａｓｓｅｍｂｌｙ）と、このＭＥＡを挟持する一対のセパレータとで構成されており、各セパレータによって形成されたガス流路を介して酸化ガス又は燃料ガスが各電極に供給されることで発電するようになっている。   The cell is composed of MEA (Membrance Electrode Assembly) which is a membrane-electrode assembly having an electrolyte membrane and a pair of electrodes arranged on both sides thereof, and a pair of separators sandwiching the MEA. Electric power is generated by supplying an oxidant gas or a fuel gas to each electrode through the formed gas flow path.

この種の燃料電池には、反り形状を記憶させた形状記憶合金からセパレータを形成し、このセパレータの反り形状を回復させてＭＥＡとセパレータとを分解する技術や、セパレータを炭素材で形成することで、ＭＥＡの電極との接着力を抑えて容易に分離させる技術が知られている（例えば、特許文献１、２参照）。
特開２００６−１２０５２０号公報 特開平８−３２９９５９号公報 In this type of fuel cell, a separator is formed from a shape memory alloy having a warped shape memorized, the warped shape of the separator is recovered, and the MEA and the separator are decomposed, or the separator is formed of a carbon material. Thus, a technique for easily separating the electrodes by suppressing the adhesive force with the MEA electrode is known (see, for example, Patent Documents 1 and 2).
JP 2006-120520 A JP-A-8-329959

しかしながら、高価な形状記憶合金からセパレータを形成する技術では、燃料電池のコストアップを招いてしまう。また、炭素材からセパレータを形成してＭＥＡの電極との接着力を抑える技術では、電極とセパレータとの間に隙間が生じ易く、これら電極とセパレータとの間に形成したガス流路にて反応ガスが円滑に流れず、発電効率が低下するおそれがある。   However, the technique of forming a separator from an expensive shape memory alloy increases the cost of the fuel cell. In addition, in the technology that forms a separator from a carbon material and suppresses the adhesive force with the MEA electrode, a gap is likely to be generated between the electrode and the separator, and the reaction occurs in the gas flow path formed between the electrode and the separator. Gas may not flow smoothly and power generation efficiency may be reduced.

本発明は、上記事情に鑑みてなされたもので、優れた発電効率を維持しつつ低コストにて容易に分解することが可能な燃料電池を提供することを目的としている。   The present invention has been made in view of the above circumstances, and an object thereof is to provide a fuel cell that can be easily disassembled at low cost while maintaining excellent power generation efficiency.

上記目的を達成するために、本発明の燃料電池は、膜−電極接合体とセパレータとを積層させて互いに接着固定したセルを備えた燃料電池であって、前記膜−電極接合体及びセパレータの周縁に把持可能な突起を有する。   In order to achieve the above object, a fuel cell of the present invention is a fuel cell comprising cells in which a membrane-electrode assembly and a separator are stacked and bonded and fixed to each other. It has a protrusion that can be gripped on the periphery.

この構成によれば、膜−電極接合体及びセパレータのそれぞれの突起を把持して引き離すことにより、材料の異なる膜−電極接合体及びセパレータを極めて容易に分離させて分解することができ、その後の再利用などの処理の容易化を図ることができる。   According to this configuration, the membrane-electrode assembly and the separator of different materials can be separated and decomposed very easily by gripping and separating the respective projections of the membrane-electrode assembly and the separator. It is possible to facilitate processing such as reuse.

また、前記突起は、一部を除いて互いに重ね合わされていても良い。この構成によれば、突起を把持して引き離す際の引っ張り力を良好に作用させることができ、膜−電極接合体及びセパレータの分離のさらなる容易化を図ることができる。   The protrusions may be overlapped with each other except for a part. According to this configuration, it is possible to satisfactorily act on the pulling force when gripping and separating the protrusion, and further facilitate the separation of the membrane-electrode assembly and the separator.

また、前記膜−電極接合体に設けられた突起は、前記膜−電極接合体の周縁を挟持した状態に接着固定される一対のフレームにそれぞれ設けられていても良い。   In addition, the protrusions provided on the membrane-electrode assembly may be provided on a pair of frames that are bonded and fixed so as to sandwich the periphery of the membrane-electrode assembly.

この構成によれば、セパレータ及びフレームの突起を把持して引き離すことにより、セパレータ及び周縁にフレームが設けられた膜−電極接合体を容易に分離することができ、また、それぞれのフレームの突起を把持して引き離すことにより、フレーム同士を分離させ、フレームと膜−電極接合体との分離も容易に行うことができる。   According to this configuration, the separator and the projections of the frame can be gripped and separated to easily separate the separator and the membrane-electrode assembly provided with the frame on the periphery, and the projections of the respective frames can be separated. By gripping and separating, the frames can be separated from each other, and the frame and the membrane-electrode assembly can be easily separated.

本発明の燃料電池によれば、優れた発電効率を維持しつつ低コストにて容易に分解することができる。   According to the fuel cell of the present invention, it can be easily disassembled at low cost while maintaining excellent power generation efficiency.

次に、本発明に係る燃料電池の実施形態について、図面を参照しつつ説明する。図１は、燃料ガス及び酸化ガスの供給を受けて発電する単一のセル（燃料電池）を示すものであり、このセルは、図示は略すが、厚さ方向に所要数積層され燃料電池スタックとされて使用されるものである。   Next, an embodiment of a fuel cell according to the present invention will be described with reference to the drawings. FIG. 1 shows a single cell (fuel cell) that generates power by receiving supply of a fuel gas and an oxidant gas. Although not shown in the drawing, this cell is stacked in a required number in the thickness direction. And is used.

なお、この燃料電池スタックは、燃料電池自動車の車載発電システムや船舶、航空機、電車あるいは歩行ロボット等のあらゆる移動体用の発電システム、さらには、建物（住宅、ビル等）用の発電設備として用いられる定置用発電システム等に適用することが可能である。   This fuel cell stack is used as an in-vehicle power generation system for fuel cell vehicles, a power generation system for all moving objects such as ships, airplanes, trains or walking robots, and also as a power generation facility for buildings (housing, buildings, etc.). It can be applied to a stationary power generation system.

図１に示すように、セル１１は、水素ガス、空気、冷却水の流路を有する、例えば、ステンレス等の金属材料から形成されたセパレータ２１と、一対のセパレータ２１で挟み込まれたＭＥＡ（Membrane Electrode Assembly）２２とから構成されている。   As shown in FIG. 1, the cell 11 has a flow path of hydrogen gas, air, and cooling water, for example, a separator 21 formed of a metal material such as stainless steel, and an MEA (Membrane sandwiched between a pair of separators 21. Electrode Assembly) 22.

ＭＥＡ２２は、電解質膜２３及びその両面に配置した一対の電極２４からなる膜−電極接合体であり、電極２４は、電解質膜２３側から触媒層及び拡散層を積層した構造とされている。つまり、燃料電池スタックを構成するセル１１は、電解質膜２３を電極２４によって挟持したＭＥＡ２２と、このＭＥＡ２２を仕切るセパレータ２１とから構成されている。   The MEA 22 is a membrane-electrode assembly including an electrolyte membrane 23 and a pair of electrodes 24 disposed on both surfaces thereof. The electrode 24 has a structure in which a catalyst layer and a diffusion layer are laminated from the electrolyte membrane 23 side. That is, the cell 11 constituting the fuel cell stack is composed of the MEA 22 having the electrolyte membrane 23 sandwiched between the electrodes 24 and the separator 21 that partitions the MEA 22.

ＭＥＡ２２を構成する電解質膜２３は、電極２４よりも僅かに大きくされており、電極２４の周縁から電解質膜２３の周縁が突出されている。そして、ＭＥＡ２２の外周には、電極２４の周縁から突出した電解質膜２３の周縁を挟持する一対の樹脂フレーム２５が設けられている。   The electrolyte membrane 23 constituting the MEA 22 is slightly larger than the electrode 24, and the periphery of the electrolyte membrane 23 protrudes from the periphery of the electrode 24. A pair of resin frames 25 that sandwich the periphery of the electrolyte membrane 23 protruding from the periphery of the electrode 24 are provided on the outer periphery of the MEA 22.

上記構成のセル１１は、樹脂フレーム２５同士の間及び樹脂フレーム２５とセパレータ２１との間が接着材２６によって接着固定されて一体化されている。   The cells 11 having the above-described configuration are integrated by bonding and fixing between the resin frames 25 and between the resin frame 25 and the separator 21 with an adhesive 26.

そして、セル１１では、ＭＥＡ２２の両面とセパレータ２１との間に形成された図示しないガス流路に酸化ガスとしての空気及び燃料ガスとしての水素がそれぞれ流されると、水素と空気中の酸素とがＭＥＡ２２を介して電気化学反応することにより、燃料ガスが供給されるアノード側と酸化ガスが供給されるカソード側のそれぞれの電極２４間にて発電する。   In the cell 11, when air as an oxidizing gas and hydrogen as a fuel gas are caused to flow through gas passages (not shown) formed between both surfaces of the MEA 22 and the separator 21, hydrogen and oxygen in the air are By electrochemical reaction through the MEA 22, electric power is generated between the respective electrodes 24 on the anode side supplied with the fuel gas and the cathode side supplied with the oxidizing gas.

また、セパレータ２１には、図示しない冷却水流路が形成されており、この冷却水流路に冷却水が送り込まれて各セル１１が冷却される。   In addition, a cooling water passage (not shown) is formed in the separator 21, and cooling water is fed into the cooling water passage to cool each cell 11.

さらに、本実施形態では、図２に示すように、セル１１を構成するセパレータ２１及び樹脂フレーム２５の一辺における周縁の一部に、それぞれ把持突起２１ａ，２５ａが形成されている。   Further, in the present embodiment, as shown in FIG. 2, gripping protrusions 21 a and 25 a are respectively formed on part of the peripheral edge on one side of the separator 21 and the resin frame 25 constituting the cell 11.

互いに隣接する一方のセパレータ２１及び一方樹脂フレーム２５に形成された把持突起２１ａ，２５ａは、それぞれ一辺における両端に形成されて互いに接着されずに重ね合わされており、互いに隣接する他方のセパレータ２１及び他方の樹脂フレーム２５に形成された把持突起２１ａ，２５ａは、それぞれ一辺における両端近傍に形成されて互いに接着されずに重ね合わされている。   One of the separators 21 adjacent to each other and the gripping projections 21a, 25a formed on one resin frame 25 are formed at both ends on one side and overlapped with each other without being bonded to each other. The gripping projections 21a and 25a formed on the resin frame 25 are formed in the vicinity of both ends on one side, and are overlapped without being bonded to each other.

また、図３に示すように、セパレータ２１の把持突起２１ａは、それぞれ対向する内側に切欠部２１ｂが形成され、樹脂フレーム２５の把持突起２５ａは、それぞれ対向側と反対の外側に切欠部２５ｂが形成されている。これにより、互いに重ね合わされた把持突起２１ａ，２５ａには、重ね合わされずに露出した露出部２１ｃ，２５ｃが設けられている。   Further, as shown in FIG. 3, the gripping projections 21a of the separator 21 are each formed with a notch 21b on the inner side facing each other, and the gripping projections 25a of the resin frame 25 are each formed with a notch 25b on the outer side opposite to the facing side. Is formed. Thereby, the exposed portions 21c and 25c that are exposed without being overlapped are provided on the gripping protrusions 21a and 25a that are overlapped with each other.

上記のように構成されたセル１１を備えた燃料電池では、セパレータ２１と周囲に樹脂フレーム２５が設けられたＭＥＡ２２とを分離して分解する場合に、図４に示すように、互いに接着固定されているセパレータ２１及び樹脂フレーム２５の把持突起２１ａ，２５ａの露出部２１ｃ，２５ｃを把持して引き離す。   In the fuel cell including the cell 11 configured as described above, when the separator 21 and the MEA 22 provided with the resin frame 25 are separated and disassembled, as shown in FIG. The separator 21 and the exposed portions 21c, 25c of the gripping projections 21a, 25a of the resin frame 25 are gripped and pulled apart.

このようにすると、互いに接着固定されていたセパレータ２１と樹脂フレーム２５とが、把持突起２１ａ，２５ａ部分から剥がされて分離され、これにより、セル１１がセパレータ２１とＭＥＡ２２とに分解される。また、樹脂フレーム２５同士を分離する場合は、互いに接着固定されていた樹脂フレーム２５の把持突起２５ａを把持して引き離す。   In this way, the separator 21 and the resin frame 25 that are bonded and fixed to each other are peeled off and separated from the gripping projections 21a and 25a, whereby the cell 11 is disassembled into the separator 21 and the MEA 22. Further, when the resin frames 25 are separated from each other, the gripping projections 25a of the resin frames 25 that are bonded and fixed to each other are gripped and pulled apart.

すると、互いに接着固定されていた樹脂フレーム２５同士が把持突起２５ａ部分から剥がされて分離される。これにより、この樹脂フレーム２５によって挟持されていたＭＥＡ２２の電解質膜２３を樹脂フレーム２５から分離させることができる。   Then, the resin frames 25 that are bonded and fixed to each other are peeled off from the gripping protrusion 25a and separated. As a result, the electrolyte membrane 23 of the MEA 22 held by the resin frame 25 can be separated from the resin frame 25.

以上、説明したように、本実施形態に係る燃料電池によれば、ＭＥＡ２２の樹脂フレーム２５の把持突起２５ａ及びセパレータ２１の把持突起２１ａを把持して引き離して分離し、さらに、樹脂フレーム２５の突起２５ａ同士を把持して引き離して分離することにより、セル１１を、金属類であるセパレータ２１、樹脂類である樹脂フレーム２５及びカーボン等からなるＭＥＡ２２に分解することができ、その後の再利用などの処理の容易化を図ることができる。   As described above, according to the fuel cell according to this embodiment, the gripping protrusion 25a of the resin frame 25 of the MEA 22 and the gripping protrusion 21a of the separator 21 are gripped and separated, and the protrusion of the resin frame 25 is further separated. By grasping and separating 25a from each other, the cell 11 can be disassembled into a separator 21 that is a metal, a resin frame 25 that is a resin, and an MEA 22 that is made of carbon or the like. Processing can be facilitated.

つまり、本実施形態の燃料電池によれば、高価な形状記憶合金を用いることなく、また、各部材同士の接着力を弱めることなく、分離の容易化を図ることができ、これにより、ガス漏れなどの不具合がなく優れた発電効率を維持しつつ低コストにて容易に分解することができる。   That is, according to the fuel cell of the present embodiment, it is possible to facilitate separation without using an expensive shape memory alloy and without weakening the adhesive force between the respective members. It can be easily disassembled at low cost while maintaining excellent power generation efficiency.

実施形態に係る燃料電池の構造を説明するセルの概略断面図である。It is a schematic sectional drawing of the cell explaining the structure of the fuel cell which concerns on embodiment. 実施形態に係る燃料電池のセルの斜視図である。It is a perspective view of the cell of the fuel cell concerning an embodiment. セルの一辺に設けられた把持突起部分の斜視図である。It is a perspective view of the holding | grip protrusion part provided in the one side of a cell. セルの分解作業を説明する把持突起部分の斜視図である。It is a perspective view of the holding | grip protrusion part explaining the decomposition | disassembly operation | work of a cell.

符号の説明Explanation of symbols

１１…セル、２１…セパレータ、２２…ＭＥＡ（膜−電極接合体）、２５…樹脂フレーム（フレーム）、２１ａ，２５ａ…把持突起（突起）。   DESCRIPTION OF SYMBOLS 11 ... Cell, 21 ... Separator, 22 ... MEA (membrane-electrode assembly), 25 ... Resin frame (frame), 21a, 25a ... Grasping protrusion (protrusion).

Claims (3)

膜−電極接合体とセパレータとを積層させて互いに接着固定したセルを備えた燃料電池であって、
前記膜−電極接合体及びセパレータの周縁に把持可能な突起を有する燃料電池。 A fuel cell comprising a cell in which a membrane-electrode assembly and a separator are laminated and adhered and fixed to each other,
The fuel cell which has the processus | protrusion which can be hold | gripped in the periphery of the said membrane-electrode assembly and a separator. 前記突起は、一部を除いて互いに重ね合わされている請求項１に記載の燃料電池。   The fuel cell according to claim 1, wherein the protrusions are overlapped with each other except for a part thereof. 前記膜−電極接合体に設けられた突起は、前記膜−電極接合体の周縁を挟持した状態に接着固定される一対のフレームにそれぞれ設けられている請求項１または請求項２に記載の燃料電池。   3. The fuel according to claim 1, wherein the protrusions provided on the membrane-electrode assembly are respectively provided on a pair of frames that are bonded and fixed so as to sandwich the periphery of the membrane-electrode assembly. battery.
JP2007076377A 2007-03-23 2007-03-23 Fuel cell Pending JP2008235159A (en)

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Cited By (4)

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WO2009144940A1 (en) * 2008-05-30 2009-12-03 パナソニック株式会社 Mea member and polymer electrolyte fuel cell
WO2011158286A1 (en) 2010-06-15 2011-12-22 トヨタ自動車株式会社 Fuel cell and method for manufacturing fuel cell
WO2012035579A1 (en) 2010-09-15 2012-03-22 トヨタ自動車株式会社 Membrane electrode assembly and manufacturing method for same, and fuel cell using same
US20210249669A1 (en) * 2018-06-26 2021-08-12 Powercell Sweden Ab Membrane electrode assembly, fuel cell stack with membrane electrode assembly and alignment tool for fuel cell stack

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009144940A1 (en) * 2008-05-30 2009-12-03 パナソニック株式会社 Mea member and polymer electrolyte fuel cell
US8298697B2 (en) 2008-05-30 2012-10-30 Panasonic Corporation MEA member and polymer electrolyte fuel cell
WO2011158286A1 (en) 2010-06-15 2011-12-22 トヨタ自動車株式会社 Fuel cell and method for manufacturing fuel cell
US8877406B2 (en) 2010-06-15 2014-11-04 Toyota Jidosha Kabushiki Kaisha Fuel cell, and method of manufacturing a fuel cell
WO2012035579A1 (en) 2010-09-15 2012-03-22 トヨタ自動車株式会社 Membrane electrode assembly and manufacturing method for same, and fuel cell using same
JP5190610B2 (en) * 2010-09-15 2013-04-24 トヨタ自動車株式会社 Membrane electrode assembly, method for producing the same, and fuel cell
US9023552B2 (en) 2010-09-15 2015-05-05 Toyota Jidosha Kabushiki Kaisha Membrane electrode assembly, manufacturing method thereof, and fuel cells
US20210249669A1 (en) * 2018-06-26 2021-08-12 Powercell Sweden Ab Membrane electrode assembly, fuel cell stack with membrane electrode assembly and alignment tool for fuel cell stack

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