Abstract: An electrochemical cell that cycles lithium ions includes a positive electrode that includes a positive electroactive material, a negative electrode that includes a silicon-containing negative electroactive material, a separating layer disposed between the positive electrode and the negative electrode, and an electrolyte that is in contact with at least one of the positive electroactive material, the negative electroactive material, and the separating layer. The electrolyte includes greater than or equal to about 0.1 wt. % to less than or equal to about 10 wt. % of a phosphite-type additive.

Abstract: A negative electrode for an electrochemical cell that cycles lithium includes a negative electrode including an electroactive material layer disposed on a current collector that has lithiated silicon oxide (LSO) negative electroactive material at ? about 10 weight % to ? about 30 weight % of a total weight of the electroactive material layer and a carbonaceous negative electroactive material, such as graphite. An electrochemical cell that incorporates such a negative electrode may also include a second electrode comprising a porous positive active material layer comprising a positive lithium containing, nickel-rich electroactive material, such as a lithium nickel manganese cobalt aluminum oxide, a porous separating layer disposed between the first electrode and the second electrode and an electrolyte disposed in pores of the separating layer.

Abstract: A battery cell comprises an electrode stack including A anode electrodes with A anode current collectors. A external tabs extend from the first side of the A anode electrodes. C cathode electrodes include C cathode current collectors and C external tabs. A separator comprises a continuous sheet interleaved between the anode electrodes and the C cathode electrodes. The A external tabs of the A anode electrodes are folded along the separator on the first side of the A anode electrodes. The C external tabs of the C cathode electrodes are folded along the separator on the second side the C cathode electrodes. The electrode stack is arranged in a housing. First and second tab positioning members including first and second external lead tabs are connected to the A external tabs and the C external tabs, respectively.

Abstract: An electrochemical cell that cycles lithium ions includes a positive electrode that includes a positive electroactive material, a negative electrode that includes a negative electroactive material, and a free-standing separating layer disposed between the positive electrode and the negative electrode. The free-standing separating layer includes a gel membrane that includes a polymer host and a liquid electrolyte and an integrated structural component disposed within the gel membrane. The integrated structural component may be selected from the group consisting of: a plurality of solid-state electrolyte particles, a nonwoven material, and a combination thereof.

Abstract: An anode-free electrochemical cell that cycles lithium ions includes a positive electrode assembly having a positive current collector and a positive electroactive material layer, a negative current collector that includes a surface configured to receive a negative electroactive material after one or more formation cycles of the anode-free electrochemical cell, and a separating layer disposed between the positive electroactive material layer and the surface of the negative current collector. The separating layer includes an electrolyte that includes greater than or equal to about 20 wt. % to less than or equal to about 99.5 wt. % of a concentrated electrolyte having a lithium salt concentration greater than or equal to about 2 M to less than or equal to about 6 M, and greater than or equal to about 0.5 wt. % to less than or equal to about 80 wt. % of an ionic liquid.

Abstract: A modular bipolar solid-state battery includes T solid-state battery modules, where T is an integer greater than one. Each of the T solid-state battery modules includes an enclosure, a first terminal arranged on a first side of the enclosure, a second terminal arranged on a second side of the enclosure opposite to the first side of the enclosure, and N solid-state battery cells arranged and interconnected in the enclosure, where N is an integer greater than one. The T solid-state battery modules are connected in at least one of series and parallel. A positive terminal of the modular bipolar solid-state battery is connected to at least one of the T solid-state battery modules. A negative terminal of the modular bipolar solid-state battery is connected to at least another one of the T solid-state battery modules.

Abstract: A battery cell includes a cathode electrode comprising a cathode coating arranged on a cathode current collector and a separator. A dual function interlayer comprising capacitor material and lithium-ion source material is arranged one of between the cathode coating and the cathode current collector and between the cathode coating and the separator. An anode electrode is arranged adjacent to the separator and comprising an anode coating arranged on an anode current collector.

Abstract: A vehicle system is provided and includes a modular dynamically allocated capacity storage system (MODACS) and an active management module. The MODACS includes blocks of cells. The active management module is configured to: detect a first state of a first block of cells of the blocks of cells; determine whether a safety fault condition exists with the first block of cells based on the first state of the first block of cells; in response to detecting existence of the safety fault condition, isolate the first block of cells from other ones of the blocks of cells; subsequent to isolating the first block of cells, actively discharge and detect a second state of the first block of cells; and based on the second state, continue isolating the first block of cells or reconnecting the first block of cells such that the first block of cells is no longer isolated.

Abstract: A battery module includes C battery cells, wherein each of the C battery cells comprises a housing and a terminals extending from the housing. T thermal interlayer devices are arranged between adjacent ones of the C battery cells. C and T are integers greater than one. Each of the T thermal interlayer devices comprises a first thermally conducting layer in thermal communication with a first one of the C battery cells, a second thermally conducting layer in thermal communication with a second one of the C battery cells, and a thermally resistant layer arranged between the first thermally conducting layer and the second thermally conducting layer. A cooling manifold is in thermal communication with at least one of the first thermally conducting layer and the second thermally conducting layer.

Abstract: An electrode for an electrochemical cell includes a silicon-containing electroactive material that includes a plurality of silicon-containing electroactive material particles and a polymeric network that forms polymeric cages around each of the silicon-containing electroactive material particles of the plurality. The polymeric cages include polyacrylic acid (PAA), lithiated polyacrylic acid (PAALi), or a combination of polyacrylic acid (PAA) and lithiated polyacrylic acid (PAALi) covalently bonded with poly(2-hydroxyethyl acrylate) (PHEA). The polymeric network has a mass ratio of the polyacrylic acid (PAA), the lithiated polyacrylic acid (PAALi), or the combination of the polyacrylic acid (PAA) and the lithiated polyacrylic acid (PAALi) to the poly(2-hydroxyethyl acrylate) (PHEA) of greater than or equal to about 0.5 to less than or equal to about 10.

Abstract: Hybrid electrochemical cells and modules include an anode two-sided current collector a coated with host material in anode region(s) and a cathode two-sided current collector coated with active material in cathode region(s), and one or more of the anode current collector and the cathode current collector is coated with capacitor material in one or more distinct, non-overlapping capacitor regions. A hybrid anode and/or cathode can include gaps between capacitor regions and anode regions and cathode regions. The capacitor material applied to an electrode is different from the host or active material thereof. Active material includes lithium metal oxides and lithium metal phosphates such as LiFePO4, Li(NixMnyCoz)O2, and/or LiMn2O4; host material includes graphite, silicon, silicon-Li/Sn/Cu alloys, Si/Co/Fe/TiSn oxides, and low-surface area carbon; and capacitor material includes activated carbon, metal oxides, and metal sulfides.

Abstract: A method for manufacturing a gel membrane for a battery cell includes supplying a first substrate to a first roller; heating a gel membrane solution in a tank, wherein the gel membrane solution includes a polymer and a liquid electrolyte comprising one or more lithium salts; arranging a slot die within a predetermined distance of the first substrate located on the first roller; pumping the gel membrane solution into an inlet of the slot die; depositing a gel membrane layer from an outlet of the slot die onto the first substrate supported by the first roller; and cooling the gel membrane layer on the first substrate.

Abstract: A bipolar battery cell includes a bipolar electrode including a bipolar current collector and a cathode electrode arranged on one side of the bipolar current collector. The cathode electrode includes cathode active material for exchanging lithium ions, a first solid electrolyte, and first polytetrafluoroethylene (PTFE) fibrils. An anode electrode is arranged on an opposite side of the bipolar current collector, wherein the anode electrode includes anode active material for exchanging lithium ions, a second solid electrolyte, and second PTFE fibrils.

Abstract: A battery cell includes an anode electrode comprising a first current collector. Anode active material is arranged on a first surface of the first current collector and is configured to exchange lithium ions. The anode active material comprises silicon. Empty spaces are formed in the anode active material in a predetermined pattern. A solid electrolyte layer is arranged adjacent to the anode electrode. A cathode electrode comprises a second current collector and cathode active material configured to exchange lithium ions and arranged adjacent to the solid electrolyte layer.

Abstract: An anode electrode includes a current collector and a first anode layer arranged on the current collector and comprising first anode active material. A first pre-lithiation layer is arranged on the first anode layer. A second anode layer arranged on the first pre-lithiation layer and comprising second anode active material.

Abstract: A battery includes: an anode electrode including a lithium metal; a cathode electrode; and a lithium fluoride (LiF) layer disposed on at least one of the anode electrode and the cathode electrode formed via a reaction between a polytetrafluoroethylene (PTFE) layer and the at least one of anode electrode and the cathode electrode during a formation process of the battery.

Abstract: A hybrid electrochemical device including at least two electrically connected solid-state electrochemical cells is provided. Each electrochemical cell includes a first outer electrode having a first current collector and a first electroactive layer, a second outer electrode having a second current collector and a second electroactive layer, and one or more intervening electrodes disposed between the electroactive layers. At least one of the intervening electrodes includes one or more capacitor additives. The first outer electrode is electrically connected to at least one of the intervening electrodes in a first electrical configuration. The second outer electrode is electrically connected to at least one of the intervening electrodes in a second electrical configuration. The at least two electrochemical cells are electrically connected in a third electrical configuration.

Abstract: A battery includes positive and negative current collectors and a plurality of bipolar electrodes arranged in a stack between the positive and negative current collectors. The positive and negative current collectors and the stack of the plurality of bipolar electrodes are folded in an S-shape.

Abstract: The present disclosure provides a modified binder for use in an electrochemical cell that cycles lithium ions. The modified binder includes one or more agglomerates of polytetrafluoroethylene nanoparticles, where each of the polytetrafluoroethylene nanoparticles includes a polytetrafluoroethylene core and a polymeric shell that is disposed on exposed surfaces of the core. The polymeric shell can include a polymer selected from the group consisting of: polyethylene oxide, polyglycidyl methacrylate, polyvinylidene difluoride, fluoride-hexafluoropropylene, polypropylene oxide, polyacrylonitrile, polymethacrylonitrile, polymethyl methacrylate, derivatives and co-polymers, and combinations thereof, and in certain instances, also a humidity tolerant lithium salt.

Abstract: The present disclosure relates to a solid-state electrochemical cell having a uniformly distributed solid-state electrolyte and methods of fabrication relating thereto. The method may include forming a plurality of apertures within the one or more solid-state electrodes; impregnating the one or more solid-state electrodes with a solid-state electrolyte precursor solution so as to fill the plurality of apertures and any other void or pores within the one or more electrodes with the solid-state electrolyte precursor solution; and heating the one or more electrodes so as to solidify the solid-state electrolyte precursor solution and to form the distributed solid-state electrolyte.