摘要:
The invention relates to a system and method of operating alkaline exchange membrane fuel cells in a bipolar configuration. The system (400) may include a first fuel cell (300A) and a second fuel cell (300B) adjacent to the first fuel cell. Each of the first and second fuel cells may include: a cathode configured to generate hydroxide ions from water, oxygen and electrons, an anode configured to generate water and electrons from the hydroxide ions and hydrogen received from a hydrogen source, and an alkaline exchange membrane configured to transfer the hydroxide ions from the cathode to the anode, and to transfer water from a vicinity of the anode to a vicinity of the cathode. The first fuel cell (300A) and a second fuel cell (300B) are connected by a porous bipolar plate (430A) positioned inbetween. A pressure profile across the first bi-polar plate may drop from higher level near the anode of the first fuel cell (300A) to lower level near the cathode of the second fuel cell (300B) so that water may be transferred from the anode of the first fuel cell (300A) to the cathode of the second fuel cell (300B).
摘要:
L'invention se rapporte à un procédé de fabrication d'une électrode composite (1) pour cellule électrochimique (10) de type métal-air à électrolyte liquide (3) de pH basique. Une solution liquide (20) comprenant un polymère fluoré (9) en suspension dans un solvant (21) est synthétisée, puis déposée sur la surface extérieure (25) d'une structure poreuse (7) formant une électrode à air. Le polymère fluoré comprend des groupements SO 2 N aptes à conduire des ions hydroxyle (4) et est apte à former une membrane (8) étanche au moins à l'électrolyte liquide de pH basique. Lors de l'application de la solution liquide sur la structure poreuse, le solvant s'écoule à travers la structure poreuse et le polymère fluoré se dépose en s 'agrégeant sous forme de couche (22) sur la surface extérieure de la structure poreuse.
摘要:
Solid oxide fuel cells and methods for fabricating solid oxide fuel cells include an electrolyte reinforcement (ERI) layer. An ink composition including a ceramic material and a sintering aid, such as a metal or metal oxide material, is applied to select portions of a solid oxide electrolyte and sintered to form an ERI layer. The ERI layer may improve the strength and durability of the electrolyte and may facilitate bonding to a high-temperature seal.
摘要:
Die Erfindung betrifft Verfahren zur Herstellung einer katalytisch beschichteten Membran (19) für eine Brennstoffzelle (10), wobei die katalytisch beschichtete Membran (19) eine Membran (11) und eine auf zumindest einer ihrer Flachseiten angeordnete Katalysatorschicht (12, 13) eines katalytischen Materials aufweist sowie einen nichtrechteckigen aktiven Bereich (20), der in einer Richtung durch zwei einander gegenüberliegende Außenseiten (30) begrenzt ist. Das Verfahren umfasst ein kontinuierliches Aufbringen des katalytischen Materials auf ein Membranmaterial (33) unter Erzeugung einer konstanten Beschichtungsbreite (B), derart dass ein mit dem katalytischen Material beschichteter Bereich (35) zumindest dem aktiven Bereich (20) entspricht. Es ist vorgesehen, dass das Membranmaterial (33) derart mit dem katalytischen Material beschichtet wird, dass eine Beschichtungsrichtung (D) einen Winkel zu den gegenüberliegenden Außenseiten (30) des aktiven Bereichs (20) ungleich 90° und ungleich 0° aufweist.
摘要:
Die Erfindung betrifft eine Katalysatorschicht (20) für eine Brennstoffzelle sowie ein zur Herstellung der Katalysatorschicht (20) geeignetes Verfahren. Die Katalysatorschicht (20) umfasst ein Katalysatormaterial (22) enthaltend ein katalytisches Material (24) und optional poröses Trägermaterial (23), auf dem das katalytische Material (24) geträgert vorliegt. Erfindungsgemäß weist die Katalysatorschicht ferner mesoporöse Partikel (21 ) aus hydrophobem Material auf.
摘要:
Membrane electrode assemblies (9) comprising a first gas diffusion layer (12,19) having a first microporous layer (101) on a major surface thereof (99), wherein the first microporous layer (101) has a major surface (110), and wherein the major surface (110) of the first microporous layer (101) has discontinuous areas (103) therein substantially free of material, and wherein at least a portion of at least one discontinuous area (103) is in an active area of the first gas diffusion layer (12,19); and methods of making the same. The membrane electrode assemblies are useful, for example, in fuel cells.
摘要:
Membrane electrode assembly comprising a first gas diffusion layer having a first microporous layer on a major surface thereof, wherein the first microporous layer has a major surface, wherein the major surface of the first microporous layer has discontinuous areas therein substantially free of microporous material, and wherein at least a portion of the first discontinuous areas have adhesive therein; and methods for making the same. Membrane electrode assemblies described herein are useful, for example, in fuel cells.
摘要:
The use of an anode catalyst layer in a proton exchange membrane fuel cell, the anode catalyst layer comprising a carbon monoxide tolerant catalyst material, wherein the catalyst material comprises : (i) a binary alloy of PtX, wherein X is a metal selected from the group consisting of rhodium and osmium, and wherein the atomic percentage of platinum in the alloy is from 45 to 80 atomic% and the atomic percentage of X in the alloy is from 20 to 55 atomic%; and (ii) a support material on which the PtX alloy is dispersed; wherein the total loading of platinum group metals (PGM) in the anode catalyst layer is from 0.01 to 0.2 mgPGM/cm 2 ; and wherein during operation of the fuel cell an impure hydrogen stream comprising up to 5ppm carbon monoxide is fed to the anode is disclosed.
摘要翻译:在质子交换膜燃料电池中使用阳极催化剂层,阳极催化剂层包含一氧化碳耐受催化剂材料,其中催化剂材料包括:(i)PtX的二元合金,其中X是选自 由铑和锇组成的组合,其中合金中铂的原子百分比为45〜80原子%,合金中X的原子百分比为20〜55原子%。 和(ii)分散有PtX合金的载体材料; 其中阳极催化剂层中铂族金属(PGM)的总负载量为0.01〜0.2mgPGM / cm 2; 并且其中在燃料电池操作期间,公开了包含高达5ppm一氧化碳的不纯氢气流供给到阳极。
摘要:
In one aspect, the present disclosure describes a first article comprising nanostructured whiskers having a first layer thereon comprising an organometallic compound comprising at least one of Ru or Ir. Optionally, the first layer further comprises an organometallic complex comprising at least one of Ru or Ir. Typically, the article includes at least one or more additional layers (e.g., a second layer comprising at least one of metallic Ir, Ir oxide, or Ir hydrated oxide on the first layer). Articles described herein are useful, for example, in fuel cell catalysts (i.e., an anode or cathode catalyst).