Abstract: A method is disclosed for suppressing propagation of a metal in a solid state electrolyte during cycling of an electrochemical device including the solid state electrolyte and an electrode comprising the metal. One method comprises forming the solid state electrolyte such that the solid state electrolyte has a structure comprising a plurality of grains of a metal-ion conductive material and a grain boundary phase located at some or all of grain boundaries between the grains, wherein the grain boundary phase suppresses propagation of the metal in the solid state electrolyte during cycling. Another method comprises forming the solid state electrolyte such that the solid state electrolyte is a single crystal.

Abstract: A method is disclosed for suppressing propagation of a metal in a solid state electrolyte during cycling of an electrochemical device including the solid state electrolyte and an electrode comprising the metal. One method comprises forming the solid state electrolyte such that the solid state electrolyte has a structure comprising a plurality of grains of a metal-ion conductive material and a grain boundary phase located at some or all of grain boundaries between the grains, wherein the grain boundary phase suppresses propagation of the metal in the solid state electrolyte during cycling. Another method comprises forming the solid state electrolyte such that the solid state electrolyte is a single crystal.

Abstract: Particular embodiments may provide a solid sulfide electrolyte. Specifically, disclosed herein are methods and systems that can include feeding polymer precursors and sulfides to an extruder, kneading the polymer precursors and the sulfide in the extruder to form a sulfide-polymer composite that includes polyurethane and sulfide, and extruding the sulfide-polymer composite to form a solid sulfide electrolyte.

Abstract: Provided herein is an apparatus. The apparatus can include a battery cell. The battery cell can include a vent. The vent can be coupled with the battery cell. The apparatus can include a channel coupled with the vent. The apparatus can include a porous component. The porous component can be disposed in the channel. The porous component can include one or more pores each having a width less than a width of the channel.

Abstract: Provided herein is an apparatus. The apparatus can include a sorbent to dispose in an electric vehicle. The electric vehicle can include a battery cell. The sorbent can be configured to remove hydrogen sulfide gas from the electric vehicle. The hydrogen sulfide gas can be generated by a component of the battery cell.

Abstract: The present solution provides a multifunctional metal-organic (MOF) interface that can be applied between battery cells, battery modules or battery packs and provide thermal isolation and active cooling, as necessary, while also providing absorption for mechanical stress of EV battery. The present solution can include a battery cell that can have an outer surface. A multifunctional material can be coupled with the outer surface of the battery cell. An opening that extends through the multifunctional material can provide thermal convection when the heat is moved through the opening. The multifunctional material can provide thermal insulation when the fluid is not moved through the opening. The multifunctional material can insulate the battery cell from mechanical stress.

Abstract: Electrochemical systems for mitigating or reducing the release of undesirable by-products of electrochemical cells are provided. These systems may be particularly relevant to the sequestering of hydrogen sulfide gas in solid state electrochemical cells with sulfide-based electrolytes. Some of the systems include an integrated hydrogen sulfide eliminating layer or microspheres containing a hydrogen sulfide eliminating material adjacent to one or more electrochemical cells and within a containment structure.

Abstract: A traction battery includes a plurality of solid-state-battery cells arranged in a stack, a pair of endplates engaging with opposing ends of the stack and configured to generate a predetermined magnitude of stack pressure in the stack, and a plate of shape-memory alloy disposed in the stack. The plate of shape-memory alloy is configured to expand or contract in thickness responsive to volume changes within the battery cells to maintain the stack pressure within a range of the predetermined magnitude.

Abstract: According to one or more embodiments, a solid-state battery includes a cathode; an anode including lithium metal; and an inorganic ceramic polycrystalline separator between the cathode and anode. The separator includes grains of an ionically conductive bulk phase and grain boundaries defined between the grains, with the grain boundaries including an oxidizing agent. The oxidizing agent is configured to oxidize the lithium metal, brought into contact with the oxidizing agent via lithium metal nucleation at or dendritic growth along the grain boundaries that results from plating of the lithium metal on the anode, to form an electronically insulating phase to prevent formation of electronic conduction pathways along the grain boundaries. The oxidizing agent is further configured to partially reduce, upon oxidation of the lithium metal, to form an ionically conductive phase to facilitate ionic conduction along the grain boundaries.

Abstract: Disclosed are electrochemical devices, such as lithium battery electrodes, lithium ion conducting solid state electrolytes, and solid-state lithium metal batteries including these electrodes and solid state electrolytes. In one embodiment, a method for forming an electrochemical device is disclosed in which a precursor electrolyte is heated to remove at least a portion of a resistive surface region of the precursor electrolyte.

Abstract: A method is disclosed for suppressing propagation of a metal in a solid state electrolyte during cycling of an electrochemical device including the solid state electrolyte and an electrode comprising the metal. One method comprises forming the solid state electrolyte such that the solid state electrolyte has a structure comprising a plurality of grains of a metal-ion conductive material and a grain boundary phase located at some or all of grain boundaries between the grains, wherein the grain boundary phase suppresses propagation of the metal in the solid state electrolyte during cycling. Another method comprises forming the solid state electrolyte such that the solid state electrolyte is a single crystal.

Abstract: Disclosed are electrochemical devices, such as lithium battery electrodes, lithium ion conducting solid state electrolytes, and solid-state lithium metal batteries including these electrodes and solid state electrolytes. In one embodiment, a method for forming an electrochemical device is disclosed in which a precursor electrolyte is heated to remove at least a portion of a resistive surface region of the precursor electrolyte.