Abstract: A coated hybrid electrode for a composite solid-state battery cell is disclosed. Systems and methods are further provided for forming an electrolyte coating including a solid ionically conductive polymer material in the coated hybrid electrode. In one example, the coated hybrid electrode can include an anode material coating, the solid polymer electrolyte coating, and a cathode material coating, such that the solid polymer electrolyte coating can function as a separator coating between the anode material coating and the cathode material coating, thus eliminating a need for a conventional battery separator. In some examples, a slurry-based coating process can be utilized for forming the solid polymer electrolyte coating. As such, the solid polymer electrolyte coating can be mechanically robust with uniform thickness. Further, a battery cell can be formed by utilizing a sub-assembly stacking technique to provide battery cell stiffness and increase precision and accuracy of coating.

Abstract: A Li-ion battery cell includes cathode and anode materials, a separator, and an electrolyte including a mixture of a polyethylene oxide and an oxide of formula LivLasZnOn. A method of forming the cell includes the following successive cycling steps: (a) at least two successive charge and discharge cycles of the cell at a first cycling rate C/x, the charge/discharge steps being limited in time to x/2; (b) at least two successive charge and discharge cycles of the cell at a second charging rate C/y, different from the first cycling rate, where y is lower than x, the charge/discharge steps being limited in time to y/2; and (c) at least two successive charge and discharge cycles of the cell at a third cycling rate C/z different from the first and second charging rates, where z is lower than x and y, the charge/discharge steps being limited in time to z/2.

Abstract: The present invention relates to a sodium-ion battery comprising a positive electrode compartment comprising a positive electrode, said positive electrode comprising a Na-insertion compound; a negative electrode compartment comprising a negative electrode, said negative electrode comprising metallic sodium; and an electrolyte composition comprising a solid sodium-ion conductive ceramic electrolyte and a catholyte comprising a metallic salt with formula MY, wherein M is a cation selected from an alkali metal and an alkali-earth metal; and Y is an anion selected from [R1SO2NSO2R2], CF3SO3?, C(CN)3?, B(C2O4)2? and BF2(C2O4)?, wherein R1 and R2 are independently selected from fluorine or a fluoroalkyl group. The device is able to operate below the melting point of the anode component.

Abstract: Systems and methods are provided for a slurry for coating an electrode structure. In one example, a method may include dispersing, by mixing at one or both of a high shear and a low shear, a solid ionically conductive polymer material in at least a first portion of a solvent to form a suspension, then dispersing, by mixing at the one or both of the high shear and the low shear, one or more additives in the suspension, and then mixing, at the one or both of the high shear and the low shear, a second portion of the solvent with the suspension to form a slurry. As such, the slurry including the solid ionically conductive polymer material may be applied as a coating in a solid-state battery cell, which may reduce resistance to Li-ion transport and improve mechanical stability relative to a conventional solid-state battery cell.

Abstract: The present invention relates to a sodium-ion battery comprising a positive electrode compartment comprising a positive electrode, said positive electrode comprising a Na-insertion compound; a negative electrode compartment comprising a negative electrode, said negative electrode comprising metallic sodium; and an electrolyte composition comprising a solid sodium-ion conductive ceramic electrolyte and a catholyte comprising a metallic salt with formula MY, wherein M is a cation selected from an alkali metal and an alkali-earth metal; and Y is an anion selected from [R1SO2NSO2R2], CF3SO3?, C(CN)3?, B(C2O4)2? and BF2(C2O4)?, wherein R1 and R2 are independently selected from fluorine or a fluoroalkyl group. The device is able to operate below the melting point of the anode component.

Abstract: A lithium-free mixed titanium and niobium oxide, including at least one trivalent metal M, and having a molar ratio Nb/Ti greater than 2, said oxide being selected from the group including the material of formula (I) and the material of formula (II): MxTi1?2xNb2+xO7±???(I) where 0<x?0.20; ?0.3???0.3; MxTi2?2xNb10+xO29±???(II) where 0<x?0.40; ?0.3???0.3.

Abstract: A method of preparing a titanium and niobium mixed oxide including the steps of: preparing a titanium and niobium mixed oxide in amorphous form by a solvothermal treatment of at least one titanium precursor and of at least one niobium precursor, mechanically crushing the titanium and niobium mixed oxide obtained at the end of the solvothermal treatment and calcinating the mixed oxide obtained after crushing.

Abstract: A lithium-free mixed titanium and niobium oxide, including at least one trivalent metal M, and having a molar ratio Nb/Ti greater than 2, said oxide being selected from the group including the material of formula (I) and the material of formula (II): MxTi1?2xNb2+xO7±???(I) where 0<x?0.20; ?0.3???0.3; MxTi2?2xNb10+xO29±???(II) where 0<x?0.40; ?0.3???0.3.

Abstract: A method of preparing a titanium and niobium mixed oxide including the steps of: preparing a titanium and niobium mixed oxide in amorphous form by a solvothermal treatment of at least one titanium precursor and of at least one niobium precursor, mechanically crushing the titanium and niobium mixed oxide obtained at the end of the solvothermal treatment and calcinating the mixed oxide obtained after crushing.