Abstract: The present disclosure provides a rechargeable electrochemical cell including an electrolyte side, a cathode side, and a polymer/plasticizer. The electrolyte side includes a solid glass electrolyte including an electrolyte mobile cation and electric dipoles, as well as an anode including a metal of the electrolyte mobile cation and contacting the solid glass electrolyte at an anode:solid glass electrolyte interface. The cathode side includes a cathode including a cathode active material into which a cathode guest cation is reversibly extracted/inserted. The cathode active material has a voltage versus lithium (Li) metal of between 3V and 15V. The polymer/plasticizer contacts the solid glass electrolyte at a solid glass electrolyte:polymer/plasticizer interface and the cathode at a polymer/plasticizer:cathode interface such that the cathode guest cation is confined to the cathode side and the electrolyte mobile cation is confined to the anode side during charge and discharge of the electrochemical cell.

Abstract: The present disclosure provides a rechargeable electrochemical cell including an electrolyte side, a cathode side, and a polymer/plasticizer. The electrolyte side includes a solid glass electrolyte including an electrolyte mobile cation and electric dipoles, as well as an anode including a metal of the electrolyte mobile cation and contacting the solid glass electrolyte at an anode:solid glass electrolyte interface. The cathode side includes a cathode including a cathode active material into which a cathode guest cation is reversibly extracted/inserted. The cathode active material has a voltage versus lithium (Li) metal of between 3V and 15V. The polymer/plasticizer contacts the solid glass electrolyte at a solid glass electrolyte:polymer/plasticizer interface and the cathode at a polymer/plasticizer:cathode interface such that the cathode guest cation is confined to the cathode side and the electrolyte mobile cation is confined to the anode side during charge and discharge of the electrochemical cell.

Abstract: The present disclosure provides an electrochemical cell including a solid glass electrolyte including an alkali metal working ion that is conducted by the electrolyte, and a dipole, an anode having an effective anode chemical potential ?A, and a cathode having an effective cathode chemical potential ?C. One or both of the cathode and anode substantially lack the working ion prior to an initial charge or discharge of the electrochemical cell. At open-circuit prior to an initial charge or discharge, an electric double-layer capacitor is formed at one or both of an interface between the solid glass electrolyte and the anode and an interface between the solid glass electrolyte and the cathode due to a difference between ?A and ?C.

Abstract: The disclosure provides a water-solvated glass/amorphous solid that is an ionic conductor-an electronic insulator, and a dielectric as well as electrochemical devices and processes that use this material, such as batteries, including rechargeable batteries, fuel cells, capacitors, electrolysis cells, and electronic devices. The electrochemical devices and products use a combination of ionic and electronic conduction as well as internal electric dipoles.

Abstract: The present disclosure provides an electrochemical storage cell including a battery. The battery includes an alkali metal anode having an anode Fermi energy, an electronically insulating, amorphous, dried solid electrolyte able to conduct alkali metal, having the general formula A3-xHxOX, in which 0?x?1, A is the alkali metal, and X is at least one halide, and a cathode including a cathode current collector having a cathode Fermi energy lower than the anode Fermi energy. During operation of the electrochemical storage cell, the alkali metal plates dendrite-free from the solid electrolyte onto the alkali metal anode. Also during operation of the electrochemical storage cell, the alkali metal further plates on the cathode current collector.

Abstract: The disclosure provides a water-solvated glass/amorphous solid that is an ionic conductor-an electronic insulator, and a dielectric as well as electrochemical devices and processes that use this material, such as batteries, including rechargeable batteries, fuel cells, capacitors, electrolysis cells, and electronic devices. The electrochemical devices and products use a combination of ionic and electronic conduction as well as internal electric dipoles.

Abstract: The present disclosure provides an electrochemical storage cell including a battery. The battery includes an alkali metal anode having an anode Fermi energy, an electronically insulating, amorphous, dried solid electrolyte able to conduct alkali metal, having the general formula A3-xHxOX, in which 0?x?1, A is the alkali metal, and X is at least one halide, and a cathode including a cathode current collector having a cathode Fermi energy lower than the anode Fermi energy. During operation of the electrochemical storage cell, the alkali metal plates dendrite-free from the solid electrolyte onto the alkali metal anode. Also during operation of the electrochemical storage cell, the alkali metal further plates on the cathode current collector.

Abstract: A rechargeable battery cell has an organic-liquid electrolyte contacting a dendrite free alkali-metal anode. The alkali-metal anode may be a liquid at the operating temperature that is immobilized by absorption into a porous membrane. The alkali-metal anode may be a solid that wets a porous-membrane separator, where the contact between the solid alkali-metal anode and the liquid electrolyte is at micropores or nanopores in the porous-membrane separator. The use of a dendrite-free solid lithium cell was demonstrated in a symmetric cell with a porous cellulose-based separator membrane. A K+-ion rechargeable cell was demonstrated with a liquid K—Na alloy anode immobilized in a porous carbon membrane using an organic-liquid electrolyte with a Celgard® or glass-fiber separator.

Abstract: The present disclosure relates to a cathode additive for a rechargeable sodium battery, to mixtures of the additive and a cathode active material, to cathodes containing the additive, to electrochemical cells with cathodes containing the additive, and to rechargeable batteries with cathodes containing the additive.

Abstract: The disclosure provides a water-solvated glass/amorphous solid that is an ionic conductor-an electronic insulator, and a dielectric as well as electrochemical devices and processes that use this material, such as batteries, including rechargeable batteries, fuel cells, capacitors, electrolysis cells, and electronic devices. The electrochemical devices and products use a combination of ionic and electronic conduction as well as internal electric dipoles.

Abstract: The present disclosure relates to a lithium nitride cathode additive for a rechargeable lithium battery, to mixtures of the additive and a cathode active material, to cathodes containing the additive, to electrochemical cells with cathodes containing the additive, and to rechargeable batteries with cathodes containing the additive.

Abstract: The invention relates to materials for use as electrodes in an alkali-ion secondary (rechargeable) battery, particularly a lithium-ion battery. The invention provides transition-metal compounds having the ordered-olivine or the rhombohedral NASICON structure and the polyanion (PO4)3? as at least one constituent for use as electrode material for alkali-ion rechargeable batteries.

Abstract: The invention relates to materials for use as electrodes in an alkali-ion secondary (rechargeable) battery, particularly a lithium-ion battery. The invention provides transition-metal compounds having the ordered-olivine or the rhombohedral NASICON structure and the polyanion (PO4)3? as at least one constituent for use as electrode material for alkali-ion rechargeable batteries.

Abstract: The invention relates to materials for use as electrodes in an alkali-ion secondary (rechargeable) battery, particularly a lithium-ion battery. The invention provides transition-metal compounds having the ordered-olivine or the rhombohedral NASICON structure and the polyanion (PO4)3? as at least one constituent for use as electrode material for alkali-ion rechargeable batteries.

Abstract: The present disclosure relates to an oxide-ion conductor having the general formula La2Ge1?xCrxMgO6?0.5x, where 0<x<1 and M=Cr, Sc, Ga and In or a mixture thereof. The present disclosure further relates to composite materials containing such oxide-ion conductors and to devices containing such oxide-ion conductors or composites.

Abstract: The present disclosure relates to an oxide-ion conductor having the general formula La2Ge1?xCrxMgO6?0.5x, where 0<x<1 and M=Cr, Sc, Ga and In or a mixture thereof. The present disclosure further relates to composite materials containing such oxide-ion conductors and to devices containing such oxide-ion conductors or composites.

Abstract: The invention relates to materials for use as electrodes in an alkali-ion secondary (rechargeable) battery, particularly a lithium-ion battery. The invention provides transition-metal compounds having the ordered-olivine or the rhombohedral NASICON structure and the polyanion (PO4)3? as at least one constituent for use as electrode material for alkali-ion rechargeable batteries.

Abstract: The invention relates to materials for use as electrodes in an alkali-ion secondary (rechargeable) battery, particularly a lithium-ion battery. The invention provides transition-metal compounds having the ordered-olivine or the rhombohedral NASICON structure and the polyanion (PO4)3? as at least one constituent for use as electrode material for alkali-ion rechargeable batteries.

Abstract: The disclosure provides a material with the general formula Sr1-xAxSi1-yGeyO3-0.5x, wherein A is K or Na, including mixtures thereof, and wherein 0?y?1 and 0?x?0.4. In a specific embodiment, 0?y?0.5. In another specific embodiment, 0?y?0.1 and 0?x?0.4. In another specific embodiment 0.9?y?1 and 0?x?0.25. The material may be a single-phase polycrystalline solid having a monoclinic crystal structure. The material may have an oxide-ion conductivity (?o) greater than or equal to 10?2 S/cm at a temperature of at least 500° C. The material may be formed into a planar or tubular membrane or a composite with another solid member. The material may be used as the electrolyte in a fuel cell or a regenerative or reverse fuel cell, as an oxygen sensor, or as an oxygen separation membrane. The material may also be used as a catalyst for oxidation of an olefin or for other purposes where oxide-ion conductivity is beneficial.

Abstract: The disclosure relates a niobium oxide useful in anodes of secondary lithium ion batteries. Such niobium oxide has formula LixM1?yNbyNb2O7, wherein 0?x?3, 0?y?1, and M represents Ti or Zr. The niobium oxide may be in the form of particles, which may be carbon coated. The disclosure also relates to an electrode composition containing at least one or more niobium oxides of formula LixM1?yNbyNb2O7. The disclosure further relates to electrodes, such as anodes, and batteries containing at least one or more niobium oxides of formula LixM1?yNbyNb2O7. Furthermore, the disclosure relates to methods of forming the above.