Metal-halogen flow battery cell, stack, system, and method, the stack including flow battery cells that each include an impermeable first electrode, an insert disposed on the first electrode and comprising sloped channels, a cell frame disposed around the insert and including a cell inlet manifold configured to provide a metal halide electrolyte and an opposing cell outlet manifold configured to receive the electrolyte, a porous second electrode disposed on the insert, such that sloped separation zones are formed between the second electrode and the channels, conductive connectors electrically connecting the first and second electrodes, and ribs disposed on the second electrode and extending substantially parallel to the channels of the insert. A depth of the channels increases as proximity to the cell outlet manifold increases.

A description is given of a fuel cell comprising an electrode-membrane unit comprising a cathode and an anode, a cathodal gas diffusion element, an anodal gas diffusion element, the electrode-membrane unit being accommodated between the gas diffusion elements; a cathodal bipolar plate, and an anodal bipolar plate. Provision is made here for the cathodal gas diffusion element or/and the anodal gas diffusion element to have at least one structural element facing the respective bipolar plate and integrally bonded to the relevant gas diffusion element.

The present disclosure relates to a production system for producing at least one electrochemical system that comprises a stack consisting of a plurality of different components which are stacked one above the other along a stacking axis of the stack, with a height dimension of each component extending along the stacking axis where the production system allows the target height of the stack to be achieved in spite of the height tolerances of the different components.

The present invention relates to a process for the manufacture of a bipolar plate composition. The invention also relates to processes for the manufacture of bipolar plates by injection, extrusion or compression, starting from said composition, and also to the bipolar plates obtained by these processes.

The invention relates to a method for coating a substrate (2), comprising the following steps:providing a transparent carrier film (21) coated with silicon,positioning the side of the carrier film (21), which is coated with silicon, on a surface of the substrate (2),rasterized impingement of the coated carrier film (21) with laser radiation, whereby silicon is detached point by point from the carrier film (21) and is deposited as a porous, rough, superhydrophilic layer (6) on the substrate (2).

Systems and methods are provided for mechanical pretreatment of bipolar plates, for example, for plating electrodes in redox flow batteries. In one example, a method for disrupting surfaces of a bipolar plate may include pressing the bipolar plate between imprint plates, and removing the pressed bipolar plate from the imprint plates prior to use in a redox flow battery. In some examples, the pressed bipolar plate may include negative indentations from at least one of the imprint plates. In some examples, the imprint plates may be patterned meshes, such that the negative indentations may include patterns of asymmetric protrusions. In this way, the bipolar plate may be pretreated via pressing so as to reduce wear to manufacturing equipment (relative to other mechanical pretreatment processes, for example) while maintaining electrochemical performance of the redox flow battery.

This disclosure relates to a bipolar plate electrode assembly of a fuel cell or of an electrolysis device comprising a stack of expanded metal layers arranged layerwise that form a gas diffusion electrode and a bipolar plate, wherein the stack is limited in the direction of the stack at least at one end by an outer expanded metal layer, wherein the outer expanded metal layer is areally materially bonded to the bipolar plate, characterized in that the outer expanded metal layer is made of two parts and comprises an expanded metal element as well as a metal insert inserted into the expanded metal element and materially bonded to the expanded metal element, wherein the outer expanded metal layer is materially bonded to the bipolar plate solely in the region of the metal insert.

The invention relates to a method for depositing a carbon-based material from a target onto a metal substrate, by ion-assisted cathode sputtering.

According to the invention, the ratio between the flow of ions that is directed toward the substrate and the flow of neutral carbon atoms that is directed toward the substrate is adjusted to between 1.7 and 3.5; and a bias voltage of between 35 V and 100 V is applied to the substrate.

A hybrid, porous transport electrode with increased efficiency, durability and catalyst utilization includes a first support porous layer and a second intermediate porous layer including fibers and non-defined shaped particles of a conductive material, a mean particle size decreasing from layer to layer from a bipolar plate towards a membrane. Said first porous layer is made from sintered fibers of the conductive material and the second layer is made from non-defined shaped particles of a conductive material, said first porous layer having a contact surface oriented towards the bipolar plate having a bigger pore size than the second porous layer having a contact surface oriented towards the membrane. An electrochemically active top layer includes an electrochemically active material or mixtures thereof on the second porous layer, the top layer having a contact surface oriented towards the membrane and smaller pore size than the second and first layers.

Systems and methods are provided for mechanical pretreatment of bipolar plates, for example, for plating electrodes in redox flow batteries. In one example, a method for disrupting surfaces of a bipolar plate may include pressing the bipolar plate between imprint plates, and removing the pressed bipolar plate from the imprint plates prior to use in a redox flow battery. In some examples, the pressed bipolar plate may include negative indentations from at least one of the imprint plates. In some examples, the imprint plates may be patterned meshes, such that the negative indentations may include patterns of asymmetric protrusions. In this way, the bipolar plate may be pretreated via pressing so as to reduce wear to manufacturing equipment (relative to other mechanical pretreatment processes, for example) while maintaining electrochemical performance of the redox flow battery.