Abstract: 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.

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: 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.

Abstract: A flow battery includes a stack of flow cells, a stack of cell frames supporting the stack of cells, stack level and cell level flow manifolds located in the stack of cell frames, and at least one sealing or shunt current mitigation feature.

Abstract: A recombinator for a flow battery including at least one input configured to provide a halogen containing flow stream and hydrogen gas to a reaction chamber and a substrate located in the reaction chamber. The substrate is configured to be directly heated and the substrate contains a catalyst. The recombinator is configured to react the hydrogen gas and the halogen using the catalyst to form a hydrogen-halogen compound.

Abstract: A porous electrode for a flow battery includes a first layer and a second layer. The first layer has at least one of a different catalytic property or a different permeability than the second layer.

Abstract: A porous electrode for a flow battery includes a first layer having a first average pore size and a second layer having a second average pore size, wherein the second pore size is smaller than the first pore size.

Abstract: A flow battery electrode assembly including a first impermeable, substantially metal electrode consisting essentially of a metal and a second permeable electrode. The assembly also includes at least one electrically conductive spacer connecting the first impermeable, substantially metal electrode and the second permeable electrode such that the first impermeable, substantially metal electrode and the second permeable electrode are spaced apart from each other by an electrolyte flow path. At least one electrically conductive spacer includes a plurality of electrically conductive spacers which mechanically and electrically connect adjacent first impermeable, substantially metal and second permeable electrodes.