Abstract: Olivine-type compounds, their preparation and use in cathode materials for sodium-ion batteries. The olivine-type compounds may be obtained by a direct synthesis embodying a hydrothermal method. The method may include preparing an aqueous mixture including a M-containing compound, a M?-containing compound and a M?-containing compound to obtain a M-M?-M? mixture; adding a P-containing compound to the mixture M-M?-M? mixture to obtain a M-M?-M?-P mixture; adding a Na-containing compound to the M-M?-M?-P mixture to obtain a Na-M-M?-M?-P mixture; and introducing the Na-M-M?-M?-P mixture into an autoclave to perform crystal growth and obtain the compound of general formula NahMiM?jM?kPO4.

Abstract: This disclosure provides for Olivine-type compounds, their preparation and use in cathode materials for sodium-ion batteries. The olivine-type compounds of the invention are obtained by a direct synthesis embodying a hydrothermal method.

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: The present invention refers to a method for preparing a solid polymer electrolyte based on modified cellulose, the method comprising the steps of: a) lithiation or sodiation of at least a hydroxyl group of each repeating unit of a “cellulose” to obtain Li(cellulose) or Na(cellulose); b) functionalization of the Li(cellulose) or Na(cellulose) obtained in step a), in the presence of an aprotic solvent by reacting it with an organic linker, wherein the organic linker serves to covalently attach at least one organic salt to the “cellulose”, and the use of the solid polymer electrolyte in lithium or sodium secondary batteries.

Abstract: This disclosure provides for Olivine-type compounds, their preparation and use in cathode materials for sodium-ion batteries. The olivine-type compounds of the invention are obtained by a direct synthesis embodying a hydrothermal method.

Abstract: A positive electrode active material for a sodium-ion secondary battery contains a compound of formula NaxMn1-y-zMyM?zO2 or its hydrate. A cathode can contain the active material and rechargeable sodium-ion battery can contain such a cathode.

Abstract: A positive electrode active material for a sodium-ion secondary battery contains a compound of formula NaxMn1?y?zMyM?zO2 or its hydrate. A cathode can contain the active material and rechargeable sodium-ion battery can contain such a cathode.

Abstract: A nanoparticulate organic hybrid material comprising inorganic nanoparticles covalently grafted with at least one anion of an organic sodium or lithium salt is provided. In addition, a process for preparing the nanoparticulate organic hybrid material and its use in the preparation of electrolytes suitable for lithium and sodium secondary batteries are provided.

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 nanoparticulate organic hybrid material comprising inorganic nanoparticles covalently grafted with at least one anion of an organic sodium or lithium salt is provided. In addition, a process for preparing the nanoparticulate organic hybrid material and its use in the preparation of electrolytes suitable for lithium and sodium secondary batteries are provided.

Abstract: The present invention relates to thiol- or an amine-associated ferromagnetic or superparamagnetic copper nanoparticles with an average diameter less than 30 nm, to the method for obtaining them and their applications in biomedicine and other fields.