The present application relates to the technical field of lithium-ion batteries and, specifically, relates to an electrolyte and a lithium-ion battery containing the electrolyte. The electrolyte of the present application includes a lithium salt, an organic solvent and additives, the additives include a fluorinated ether compound and an ester dimer compound, the ester dimer compound includes carbonate dimers, carboxylate dimers and sultone dimers. The lithium battery adopting the electrolyte of the present application can realize the object of high voltage, of which the highest normal working voltage can be improved to 4.4˜5.0V, and the lithium battery has good cycle performance, such as higher capacity retention rate at charge or discharge and improved service life.

The high thermal conduction resistances of a lithium-ion battery (LIB) severely limit the effectiveness of a conventional external thermal management system (TMS). A method for a new thermal management system for lithium-ion batteries that utilizes a multi-functional electrolyte (MFE) to remove heat locally inside the cell by evaporating a volatile component of the MFE is disclosed. These new electrolyte mixtures comprise a high vapor pressure co-solvent. The characteristics of a previously unstudied high vapor pressure co-solvent HFE-7000 (65 kPa at 25° C.) in an MFE (1 M LiTFSI in 1:1 HFE-7000/EMC), and other possible MFE compositions that can be utilized in a custom electrolyte boiling facility, are disclosed.

The high thermal conduction resistances of a lithium-ion battery (LIB) severely limit the effectiveness of a conventional external thermal management system (TMS). A method for a new thermal management system for lithium-ion batteries that utilizes a multi-functional electrolyte (MFE) to remove heat locally inside the cell by evaporating a volatile component of the MFE is disclosed. These new electrolyte mixtures comprise a high vapor pressure co-solvent. The characteristics of a previously unstudied high vapor pressure co-solvent HFE-7000 (65 kPa at 25° C.) in an MFE (1 M LiTFSI in 1:1 HFE-7000/EMC), and other possible MFE compositions that can be utilized in a custom electrolyte boiling facility, are disclosed.

A structure for use in an energy storage device, the structure comprising a backbone system extending generally perpendicularly from a reference plane, and a population of microstructured anodically active material layers supported by the lateral surfaces of the backbones, each of the microstructured anodically active material layers having a void volume fraction of at least 0.1 and a thickness of at least 1 micrometer.

A structure for use in an energy storage device, the structure comprising a backbone system extending generally perpendicularly from a reference plane, and a population of microstructured anodically active material layers supported by the lateral surfaces of the backbones, each of the microstructured anodically active material layers having a void volume fraction of at least 0.1 and a thickness of at least 1 micrometer.

The present application relates to the technical field of lithium-ion batteries and, specifically, relates to an electrolyte and a lithium-ion battery containing the electrolyte. The electrolyte of the present application includes a lithium salt, an organic solvent and additives, the additives include a fluorinated ether compound and an ester dimer compound, the ester dimer compound includes carbonate dimers, carboxylate dimers and sultone dimers.

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 [R.sup.1SO.sub.2NSO.sub.2R.sup.2], CF.sub.3SO.sub.3.sup.−, C(CN).sub.3.sup.−, B(C.sub.2O.sub.4).sub.2.sup.− and BF.sub.2(C.sub.2O.sub.4).sup.−, wherein R.sub.1 and R.sub.2 are independently selected from fluorine or a fluoroalkyl group. The device is able to operate below the melting point of the anode component.

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 [R.sup.1SO.sub.2NSO.sub.2R.sup.2], CF.sub.3SO.sub.3.sup.−, C(CN).sub.3.sup.−, B(C.sub.2O.sub.4).sub.2.sup.− and BF.sub.2(C.sub.2O.sub.4).sup.−, wherein R.sub.1 and R.sub.2 are independently selected from fluorine or a fluoroalkyl group. The device is able to operate below the melting point of the anode component.

The present invention relates to a method for analyzing a degree of impregnation of an electrolyte of an electrode in a battery cell, the method comprising: a battery cell manufacturing step (S1) of preparing a battery cell by injecting an electrolyte into a battery cell including an electrode to be evaluated; a step of charging/discharging the battery cell several times and obtaining a capacity-voltage profile for each cycle (S2); a step of obtaining a differential capacity (dV/dQ) curve obtained by differentiating the capacitance-voltage profile for each cycle with respect to the capacity (S3); and a step of, in the differential capacity curve, determining a cycle at which behavior becomes the same as a time point when impregnation is sufficiently performed (S4).

Provided is a method for producing a negative electrode for an electric storage device, the method comprising the steps of preparing a negative electrode composition comprising a negative electrode active material that reversibly carries a sodium ion, metal sodium, and a liquid dispersion medium for dispersing them; allowing a negative electrode current collector to hold the negative electrode composition; evaporating at least part of the liquid dispersion medium from the negative electrode composition held by the negative electrode current collector, thereby giving a negative electrode precursor comprising the negative electrode active material, the metal sodium, and the negative electrode current collector; and bringing the negative electrode precursor into contact with an electrolyte having sodium ion conductivity, thereby doping the negative electrode active material with sodium eluted from the metal sodium.