Abstract:
A flow battery includes a compression assembly including one or more biasing devices, a first compression member, an opposing second compression member, and a flow battery stack located between the first and second compression members. The flow battery stack includes stacked electrodes located in a central portion of the flow battery stack, and cell frames located in an edge portion of the flow battery stack and that surround the electrodes. The compression assembly is configured to apply a higher biasing force to the stacked electrodes located in the central portion of the flow battery stack than to the cell frames located in the edge portion of the flow battery stack.
Abstract:
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).
Abstract:
La présente invention concerne une méthode d'obtention d'une membrane électrolyte présentant une faible perméabilité aux gaz consistant à soumettre une membrane à base de polymère conducteur protonique à un traitement thermochimique ou photochimique d'oxydation, ainsi que la membrane électrolyte ainsi obtenue présentant des performances en piles améliorées.
Abstract:
The present invention relates to a polymeric material comprising structural elements of the following general formula (I): wherein Ph 1 , Ph 2 and Ph 3 independently are phenylenes comprising acidic groups with or without a spacer or salts thereof; X 1 , X 2 , X 3 and X 4 independently are O, S, SO, SO 2 , or a direct bond and wherein X 1 also may be H termination when Formula (I) relates to side chains of the polymeric material, and wherien at least two of X 1 , X 2 , X 3 and X 4 are SO or SO 2 when the Formula (I) relates to main chains of the polymeric material or at least one of X 1 , X 2 , X 3 and X 4 is SO or SO 2 when the Formula (I) relates to side chains of the polymeric material; m, n and q independently are integers and m+n+q is at least 3 when the Formula (I) relates to main chains of the polymeric material or m+n+q is at least 2 when the Formula (I) relates to side chains of the polymeric material, wherein the sum m+n+q is identical for all structural elements in the polymeric material and wherein, when the Formula (I) relates to main chains of the polymeric material and when any one of X 1 , X 2 , X 3 and X 4 is SO or SO 2 then the Ph 1 , Ph 2 or Ph 3 , linked to SO or SO 2 , have at least one of the acidic groups, with or without a spacer or salts thereof, positioned in ortho position in relation to SO or SO 2 . The invention also relates to the production of such a polymeric material.
Abstract:
PBI-based MEAs for high temperature Polymer Electrolyte Membrane Fuel Cell (PEMFC) were prepared by direct hot pressing of catalyst layer on Teflon sheets on to both sides of phosphoric acid doped PBI membrane (decal transfer). These MEAs show two times higher performance compared to the MEAs prepared by normal brush coating method on GDL at an operating temperature of 160°C.
Abstract:
A method of manufacturing a proton conducting fuel cell composite membrane includes the step of electrospinning a non-charged polymeric material, such as PVDF and PSF, into fiber mats. The fibers are fused to one another to provide a welded porous mat. The welded porous mat is filled with proton conducting electrolyte, such as PFSA polymer, to generate a proton conducting composite membrane. The resulting proton conducting fuel cell membrane comprises a randomly oriented, three dimensional interlinked fiber lattice structure filled with proton conducting electrolyte, such as PFSA polymer.
Abstract:
La présente invention a pour objet une membrane comprenant un matériau polymère poreux à base de polyimide à macropores interconnectés, imprégné de CLIP, ainsi que son procédé de fabrication et ses utilisations. Les membranes objets de l'invention répondent au besoin de disposer de membranes comprenant des CLIP possédant à la fois de bonnes propriétés de conduction protonique et de bonnes propriétés physiques, en particulier une grande stabilité thermique et mécanique, et ayant une large plage de stabilité électrochimique.
Abstract:
Disclosed are a proton-conductive film, a production method for the same and a fuel cell comprising the same. According to one embodiment of the present invention, provided is a proton-conductive film comprising: a metal oxide film comprising one or more through holes; and a polymer filling the one or more through holes.