Abstract: Electrolytes and electrolyte additives for energy storage devices comprising a sulfonate ester compound are disclosed. The energy storage device comprises a first electrode and a second electrode, wherein at least one of the first electrode and the second electrode is a Si-based electrode, a separator between the first electrode and the second electrode, an electrolyte, and at least one electrolyte additive selected from a sulfonate ester compound.

Abstract: A secondary battery includes a positive electrode; a negative electrode including a negative electrode active material layer including a negative electrode active material and a negative electrode conductive agent, and an electrolytic solution. The negative electrode active material includes a plurality of primary negative electrode active material particles and a plurality of secondary negative electrode active material particles, and the negative electrode active material includes a lithium titanium composite oxide.

Abstract: In certain embodiments, a method includes forming a battery electrode on a substrate. Forming the battery electrode on the substrate includes depositing a first electrode active material layer on a first portion of a surface of the substrate and depositing, to form a current collector, a conductive material using a thin film deposition process on a surface of the first electrode active material layer. The conductive material is deposited over an edge of the first electrode active material layer and onto a second portion of the surface of the substrate, the second portion of the substrate being adjacent to the first portion of the substrate. The method includes removing the battery electrode from the substrate, the battery electrode including the first electrode active material layer and the current collector.

Abstract: The present invention relates to a device and method which can measure, in real time, the resistance, depending on pressure changes, of a separator that is immersed in an electrolyte, and enables analysis of the resistance properties of a separator reflecting the real operating state of a secondary battery.

Abstract: Electrolyte additives for energy storage devices comprising functional epoxides compounds are disclosed. Catalysts may be combined with the functional epoxides to create bi-component electrolyte additive systems, which can be utilized as additives to an electrolyte composition. The energy storage device may comprise a first electrode and a second electrode, wherein at least one of the first electrode and the second electrode is a Si-based electrode, a separator between the first electrode and the second electrode, and an electrolyte composition.

Abstract: A non-aqueous electrolyte secondary battery which uses a non-aqueous electrolyte solution in which a main component of a non-aqueous solvent is a fluorinated solvent, and by which it is possible to suitably prevent a decrease in battery capacity. A method for producing the non-aqueous electrolyte solution disclosed here includes a fluorinated solvent provision step for preparing the fluorinated solvent, a highly polar solvent provision step for preparing a highly polar solvent having a relative dielectric constant of 40 or more, a LiBOB dissolution step for preparing a highly concentrated LiBOB solution by dissolving LiBOB in the highly polar solvent at a concentration that exceeds the saturation concentration in the fluorinated solvent, and a mixing step for mixing the fluorinated solvent with the highly concentrated LiBOB solution.

Abstract: An electrolyte for a lithium secondary battery, and a lithium secondary battery including the same are disclosed herein. In some embodiments, an electrolyte includes a lithium salt having a concentration of 1.6 M to 5 M, an oligomer including a unit represented by Formula A, and an organic solvent including a cyclic carbonate-based compound and an acetate-based compound, wherein the cyclic carbonate-based compound is present in an amount of 6 vol % to 19 vol % based on the total volume of the organic solvent.

Abstract: Heterocyclic sulfonyl fluoride additives for electrolyte composition for lithium batteries An electrolyte composition containing •(i) at least one aprotic organic solvent; •(ii) at least one conducting salt; •(iii) at least one compound of formula (I) wherein R1, R2, and R3 are each independently H or a C1-C20 hydrocarbon group which may be unsubstituted or substituted by one or more substituents selected from F, CN, OS(O)2F, and S(O)2F and which may contain one or more groups selected from —O—, —S—, —C(O)O—, —OC(O)—, and —OS(O)2—; wherein at least one of R1, R2, and R3 is substituted by one or more S(O)2F groups; and •(iv) optionally one or more additives.

Abstract: The present application relates to an electrolytic solution and an electrochemical device using the same. The electrolytic solution comprises a cyclic fluorocarbonate, a chain fluorocarbonate and a fluoroether compound, wherein based on the weight of the electrolytic solution, the weight percentage of the cyclic fluorocarbonate is 15 wt % to 80 wt %. The electrolytic solution provided by the present application has high electric conductivity and good electrochemical stability and safety performance, can significantly improve the cycle performance of the battery, and especially meet the demand for long cycle life of a lithium metal battery, and has a very large application value in the lithium metal battery.

Abstract: A lithium secondary battery which is made of an anode-free battery and comprises lithium metal formed on a negative electrode current collector by charging. The lithium secondary battery comprises the lithium metal formed in a state of being shielded from the atmosphere, so that the generation of a surface oxide layer (native layer) formed on the negative electrode according to the prior art does not occur fundamentally, thereby preventing the deterioration of the efficiency and life characteristics of the battery.

Abstract: Provided herein are electrochemical cells having a solid separator, a lithium metal anode, and a positive electrode catholyte wherein the electrochemical cell includes a nitrile, dinitrile, or organic sulfur-including solvent and a lithium salt dissolved therein. Also set forth are methods of making and using these electrochemical cells.

Abstract: An electrochemical cell comprising an alkali metal negative electrode layer physically and chemically bonded to a surface of a negative electrode current collector via an intermediate metal chalcogenide layer. The intermediate metal chalcogenide layer may comprise a metal oxide, a metal sulfide, a metal selenide, or a combination thereof. The intermediate metal chalcogenide layer may be formed on the surface of the negative electrode current collector by exposing the surface to a chalcogen or a chalcogen donor compound. Then, the alkali metal negative electrode layer may be formed on the surface of the negative electrode current collector over the intermediate metal chalcogenide layer by contacting at least a portion of the metal chalcogenide layer with a source of sodium or potassium to form a layer of sodium or potassium on the surface of the negative electrode current collector over the metal chalcogenide layer.

Abstract: An electrode mixture of the present invention comprises: an electrode active material; a binder; and a conductive material. When a cross-section of the electrode mixture is imaged such that a pixel filled 100% with a conductive material among a plurality of divided pixels is considered to be a condensed pixel and a value obtained by counting condensed pixels is considered to be the degree of agglomeration, the degree of agglomeration of a conductive material in the electrode mixture in the depth direction of the electrode mixture has a standard deviation less than 3.0. The electrode mixture as described above includes a conductive material uniformly distributed therein and thus has low electrode resistance. Therefore, the electrode mixture can improve output and lifespan properties of a lithium secondary battery to which the electrode mixture has been applied.

Abstract: A surface-enabled, metal ion-exchanging battery device comprising a cathode, an anode, a porous separator, and a metal ion-containing electrolyte, wherein the metal ion is selected from (A) non-Li alkali metals; (B) alkaline-earth metals; (C) transition metals; (D) other metals such as aluminum (Al); or (E) a combination thereof; and wherein at least one of the electrodes contains therein a metal ion source prior to the first charge or discharge cycle of the device and at least the cathode comprises a functional material or nanostructured material having a metal ion-capturing functional group or metal ion-storing surface in direct contact with said electrolyte, and wherein the operation of the battery device does not involve the introduction of oxygen from outside the device and does not involve the formation of a metal oxide, metal sulfide, metal selenide, metal telluride, metal hydroxide, or metal-halogen compound.

Abstract: Methods, compositions, reagents, and systems that allow for the preparation and utilization of sulfonamide salt polymer electrolytes are disclosed herein. Methods and reagents to prepare sulfonamide salt monomers are also disclosed herein. The sulfonamide salt polymer electrolytes can be used as components in energy storage devices, conductive materials, electrochemical cells, gels, adhesives, and drug delivery vehicles.

Abstract: An electrolyte, electrochemical device, battery, capacitor, and/or the like include a salt; and a fluorinated organosulfate compound represented by Formula I: wherein, R1 is H, OR3, alkyl, alkenyl, alkynyl, aralkyl, or silyl; R2 is H, OR3, alkyl, alkenyl, alkynyl, aralkyl, or silyl; and R3 is H, alkyl, alkenyl, alkynyl, aryl, heterocyclyl, heteroaryl, or siloxy; or where R1 and R2 join together to form a cyclic compound incorporating the —O—S(O)2—O— group; wherein at least one R1 and R2 is fluorinated.

Abstract: An electrolytic composition including at least one lithium salt of formula (A) wherein Rf represents a fluorine atom, a nitrile group, an optionally fluorinated or perfluorinated alkyl group having from 1 to 5 carbons, an optionally fluorinated or perfluorinated alkoxy group having from 1 to 5 carbons or an optionally fluorinated or perfluorinated oxa-alkoxy group having from 1 to 5 carbons; and the following solvent mixture: ethylene carbonate, ?-butyrolactone, and methyl propanoate. Also, to the use of the compositions in Li-ion batteries.

Abstract: In one implementation, an integrated processing tool for the deposition and processing of lithium metal in energy storage devices. The integrated processing tool may be a web tool. The integrated processing tool may comprises a reel-to-reel system for transporting a continuous sheet of material through the following chambers: a chamber for depositing a thin film of lithium metal on the continuous sheet of material and a chamber for depositing a protective film on the surface of the thin film of lithium metal. The chamber for depositing a thin film of lithium metal may include a PVD system, such as an electron-beam evaporator, a thin film transfer system, or a slot-die deposition system. The chamber for depositing a protective film on the lithium metal film may include a chamber for depositing an interleaf film or a chamber for depositing a lithium-ion conducting polymer on the lithium metal film.

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 provides a positive electrode material for lithium secondary batteries, having: a positive electrode active material containing Li; and a cover disposed on the positive electrode active material, and containing Li and F, and further containing one or two or more cover elements from among Al, Ti, Zr, Ta and Nb. With a Point a as an arbitrary point of the cover in contact with the positive electrode active material, a Point c as a point on the surface of the cover at a shortest distance from the Point a, and a Point b as a midpoint between the Point a and the Point c, an analysis of the Point a, the Point b and the Point c by X-ray photoelectron spectroscopy yields a ratio of Li concentration at the Point a with respect to the Li concentration at the Point b is 1.1 or higher and lower than 10.8, and a ratio of F concentration at the Point c with respect to F concentration at the Point b is 1.1 or higher and lower than 51.1.

Abstract: The present invention relates to an electrolytic solution for a magnesium battery, formed by mixing a compound represented by the following general formula (I), a Lewis acid or a compound represented by the following general formula (A), and a solvent; and the like. {In the formula, m represents 0 or 2, n represents 2 in a case of m=0 and represents 0 or 1 in a case of m=2, X1 represents a chlorine atom or a bromine atom, and two R1's each independently represent a magnesium chloride oxy group; a magnesium bromide oxy group; an alkyl group which may have a halogeno group or the like as a substituent; an alkoxy group; an aryl group which may have an alkoxy group or the like as a substituent; an aryloxy group which may have an alkoxy group or the like as a substituent; or a group represented by the following general formula (1), and two R1's may also form the following general formula (2).

Abstract: A novel chemical synthesis route for lithium ion battery applications focuses on the synthesis of a new active material using NMC (Lithium Nickel Manganese Cobalt Oxide) as the precursor for a phosphate material having a layered crystal structure. Partial phosphate generation in the layer structured material stabilizes the material while maintaining the large capacity nature of the layer structured material.

Abstract: The present invention provides a positive electrode material for lithium secondary batteries, having: a positive electrode active material containing Li; and a cover disposed on the positive electrode active material, and containing Li and F, and further containing one or two or more cover elements from among Al, Ti, Zr, Ta and Nb. With a Point a as an arbitrary point of the cover in contact with the positive electrode active material, a Point c as a point on the surface of the cover at a shortest distance from the Point a, and a Point b as a midpoint between the Point a and the Point c, an analysis of the Point a, the Point b and the Point c by X-ray photoelectron spectroscopy yields a ratio of Li concentration at the Point a with respect to the Li concentration at the Point b is 1.1 or higher and lower than 10.8, and a ratio of F concentration at the Point c with respect to F concentration at the Point b is 1.1 or higher and lower than 51.1.

Abstract: The present disclosure relates to systems and methods for packaging a solid-state battery. Consistent with some embodiments, a package for a solid-state battery includes a substrate, a cap disposed over the substrate and forming an enclosure with the substrate, and a solid-state battery disposed inside the enclosure. The solid-state battery includes a first electrode that is disposed over the substrate, an electrolyte that is disposed over the first electrode, and a second electrode that is disposed over the electrolyte. The package further includes a compressible component disposed inside the enclosure and between the cap and the second electrode of the solid-state battery. The compressible component applies a pressure to at least one of the electrodes of the solid-state battery in a direction substantially perpendicular to the electrode(s) of the solid-state battery.

Abstract: An energy storage device has an anode, a cathode and an electrolyte membrane, installed in between the anode and the cathode, wherein at least one of the anode, the cathode and the electrolyte membrane is incorporated with a copolymer and the copolymer is grafted to a functional group with ionic conductive function. Therefore, the energy storage device, which utilizes copolymers and electrolyte membranes, has better efficiency of charge/discharge performance; thus the efficiency thereof increases; the lifetime thereof is prolonged effectively.

Abstract: An easily handleable electrolytic copper foil securing a highly durable secondary battery, an electrode including same, a secondary battery including same, and a method of manufacturing same. The electrolytic copper foil including first and second surfaces includes a copper layer including a matte surface facing the first surface and a shiny surface facing the second surface, a first protective layer formed on the matte surface of the copper layer, and a second protective layer formed on the shiny surface of the copper layer. A coefficient of thermal expansion of the electrolyte copper foil measured using thermomechanical analyzer while heating the electrolytic copper foil from 30 to 190° C. at 5° C./min ranges from 16 to 22 ?m/(m·° C.), tensile strength of the electrolytic copper foil measured after heat treatment at 190° C., ranges from 21 to 36 kgf/mm2, and weight deviation of the electrolytic copper foil is 5% or less.

Abstract: A method for producing a secondary battery including: an electrolytic solution containing a metal salt whose cation is an alkali metal, an alkaline earth metal, or aluminum and whose anion has a chemical structure represented by general formula (1) below, and a linear carbonate represented by general formula (2) below; a negative electrode; a positive electrode; and a coating on a surface of the negative electrode and/or the positive electrode, the coating containing S, O, and C, the method including forming the coating by performing a specific activation process on a secondary battery including the electrolytic solution, the negative electrode, and the positive electrode, (R1X1)(R2SO2)N??general formula (1), R20OCOOR21??general formula (2).

Abstract: An energy storage apparatus is described and claimed herein comprising, generally, a battery housing enclosing a negative electrode, a positive electrode, and an electrolyte, wherein the electrolyte comprises a salt dissolved in either an amide-based solvent. In various embodiments, the amide-based solvent is a tertiary amide. Moreover, the energy storage apparatus may be a lithium ion battery that comprises an electrolyte with a lithium salt dissolved in a tertiary amide.

Abstract: A rechargeable lithium ion battery comprising a positive electrode, a negative electrode and an electrolyte, the positive electrode comprising a lithium nickel manganese cobalt oxide-based powder with particles comprising a core and a surface layer, the core having a layered crystal structure comprising the elements Li, M and oxygen, wherein M has the formula M=(Niz(Ni1/2Mn1/2)yCox)1-kAk, with 0.13?x?0.30, 0.20?z?0.55, x+y+z=1 and 0<k?0.1, wherein A is at least one dopant and comprises Al, the lithium nickel manganese cobalt oxide-based powder having a molar ratio 0.95?Li:M?0.10, wherein the surface layer consists of a mixture of elements of the core Li, M and O, and alumina, and wherein the electrolyte comprises the additive lithium difluorophosphate.

Abstract: Provided are a composite cathode active material for a lithium ion battery including a nickel-rich lithium nickel-based compound having a nickel content of 50 to 100 mol % based on a total content of transition metals; and a coating film including a rare earth metal hydroxide and disposed on the surface of the nickel-rich lithium nickel-based compound, a manufacturing method therefor, and a lithium ion battery including a cathode including the composite cathode active material.

Abstract: A lithium secondary battery includes a positive electrode, a negative electrode on which a lithium metal is deposited in a charged state, a separator disposed between the positive electrode and the negative electrode, and a nonaqueous electrolyte containing a nonaqueous solvent and a lithium salt containing a carborane anion.

Abstract: The present disclosure relates to a precursor of a positive electrode active material for a secondary battery including a single layer-structured secondary particle in which pillar-shaped primary particles radially oriented in a surface direction from the particle center are aggregated, wherein the secondary particle has a shell shape, and the primary particle includes a composite metal hydroxide of Ni—Co—Mn of the following Chemical Formula 1, and a positive electrode active material prepared using the same: Ni1?(x+y+z)CoxMyMnz(OH)2??[Chemical Formula 1] In Chemical Formula 1, M, x, y and z have the same definitions as in the specification.

Abstract: A nonaqueous secondary cell provided with: a positive electrode provided with a positive-electrode current-collecting substrate and a positive-electrode active material layer formed thereon, the positive-electrode active material layer being able to absorb or discharge lithium; a negative electrode provided with a negative-electrode current-collecting substrate and a negative-electrode active material layer formed thereon, the negative-electrode active material layer being able to absorb or discharge lithium; a separator interposed between the positive and negative electrodes; and a nonaqueous electrolyte solution. The nonaqueous electrolyte solution contains a sulfonyl imide electrolyte and a nonaqueous organic solvent. An electroconductive protective layer obtained by dispersing an electroconductive carbon material in a binder resin is formed on one or both surfaces of the positive-electrode current-collecting substrate and/or the negative-electrode current-collecting substrate.

Abstract: According to one embodiment, a nonaqueous electrolyte battery includes a positive electrode, a negative electrode and a nonaqueous electrolyte. The negative electrode includes a titanium and niobium-containing composite oxide. The nonaqueous electrolyte includes at least one compound selected from compounds represented by the formulas (1) and (2).

Abstract: Disclosed is an additive for nonaqueous electrolyte solutions, comprising a disulfonic acid amide compound represented by Formula (1). In Formula (1), A represents a CmH(2m-n)Zn, in which m represents an integer of 1 to 6, n represents an integer of 1 to 12, 2m-n is 0 or more, and Z represents a halogen atom, R1, R2, R3, and R4 represent an alkyl group having 1 to 6 carbon atoms which is substituted with a phenyl group optionally having a substituent, or the like, and R1 and R2, and R3 and R4 may be linked respectively to form an alkylene group having 2 to 5 carbon atoms in total which forms a cyclic structure together with a nitrogen atom.

Abstract: An object of the present invention 1 is to provide a non-aqueous electrolyte secondary battery having excellent general performance balance between durability performance and properties, such as a capacity, a resistance, and output characteristics.

Abstract: Disclosed is an additive for nonaqueous electrolyte solutions, comprising a disulfonic acid amide compound represented by Formula (1). In Formula (1), A represents a CmH(2m-n)Zn, in which m represents an integer of 1 to 6, n represents an integer of 1 to 12, 2m-n is 0 or more, and Z represents a halogen atom, R1, R2, R3, and R4 represent an alkyl group having 1 to 6 carbon atoms which is substituted with a phenyl group optionally having a substituent, or the like, and R1 and R2, and R3 and R4 may be linked respectively to form an alkylene group having 2 to 5 carbon atoms in total which forms a cyclic structure together with a nitrogen atom.

Abstract: A method is provided for forming a negative electrode for a lithium-ion cell. The method include the steps of: carrying out first constant-current charging with a first charging current until a first half-cell potential with regard to a reference electrode is reached; carrying out first constant-voltage charging at the first half-cell potential with regard to the reference electrode until a second charging current is reached; carrying out AC voltage excitation or alternating current excitation over a frequency time period; carrying out second constant-current charging with a third charging current until a second half-cell potential with regard to the reference electrode is reached; and carrying out second constant-voltage charging at the second half-cell potential with regard to the reference electrode until a final charging current is reached or until a maximum constant-voltage charging duration is reached.

Abstract: A rechargeable lithium battery includes: a positive electrode including a positive active material; and an electrolyte solution including a solvent and an additive, wherein the positive active material includes a lithium-containing transition metal oxide, the solvent includes a hydrofluoroether, and the additive includes a first additive represented by Chemical Formula 1 and at least one selected from a second additive represented by Chemical Formula 2, a third additive represented by Chemical Formula 3, and a fourth additive represented by Chemical Formula 4.

Abstract: An electrode for a non-aqueous electrolyte secondary battery whose life properties can be improved, and a non-aqueous electrolyte secondary battery including the electrode. An electrode for a non-aqueous electrolyte secondary battery according to one aspect of the present invention includes a collector, and an active material layer formed on a surface of the collector. The active material layer includes an active material containing SiOx particles having surfaces to which a carboxyl group-containing polymer is bonded, and a binder made of a carboxyl group-containing water-soluble polymer having a carbohydrate structure. The polymer and the binder are bonded to each other.

Abstract: A sodium ion battery comprises a cathode having a porous redox active metal-organic framework material. The battery can be an organic electrolyte sodium ion battery wherein the electrolyte comprises a sodium salt dissolved in an organic solvent or mixture of organic solvents. Alternatively, the battery can comprise an aqueous sodium ion battery wherein the electrolyte comprises a sodium salt dissolved in an aqueous solvent. Battery performance is especially related to electrolyte and binder selection.

Abstract: 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 comprises an organic solvent, a lithium salt and an additive, wherein the additive contains a cyanosulfone compound and a lithium fluorophosphate compound. When the electrolyte contains both the cyanosulfone compound and the lithium fluorophosphate at the same time, the cyanosulfone compound will form a passive film on the surface of the electrode of a high-voltage battery, so as to effectively suppress reaction between the electrolyte and the electrode, further, the lithium fluorophosphate can effectively suppress the decomposition of the lithium salt and improve the film resistance of the electrode. Under the synergistic effect of the two, the cycle performance of the lithium-ion battery is greatly improved, and the storage performance of the electrolyte is also significantly improved.

Abstract: A positive electrode mixture layer of a non-aqueous secondary battery of the present invention contains a first positive electrode active material and a second positive electrode active material each composed of a lithium-containing composite oxide represented by General Composition Formula (1): Li1+yMO2 (1). The first positive electrode active material contains Co, and the second positive electrode active material contains Co, Ni and Mn. The ratio of the first positive electrode active material to all positive electrode active materials contained in the positive electrode mixture layer is 20 mass % or more. The positive electrode mixture layer has a density of 3.4 g/cm3 or less. Further, a negative electrode mixture layer contains carbon-coated SiOx and graphite, or a conductive layer is formed on a surface of a positive electrode current collector.

Abstract: A magnesium-ion battery containing an anode of magnesium metal, a cathode, capable of absorption and release of Na ions; and a nonaqueous electrolyte containing a sodium ion salt selected from NaHMDS, NaPF6 and a sodium carborane and a magnesium ion salt selected from PhMgCl—AlCl3 (APC), a Mg carborane, and MgHMDS—Cl is provided.

Abstract: A surface-enabled, metal ion-exchanging battery device comprising a cathode, an anode, a porous separator, and a metal ion-containing electrolyte, wherein the metal ion is selected from (A) non-Li alkali metals; (B) alkaline-earth metals; (C) transition metals; (D) other metals such as aluminum (Al); or (E) a combination thereof; and wherein at least one of the electrodes contains therein a metal ion source prior to the first charge or discharge cycle of the device and at least the cathode comprises a functional material or nano-structured material having a metal ion-capturing functional group or metal ion-storing surface in direct contact with said electrolyte, and wherein the operation of the battery device does not involve the introduction of oxygen from outside the device and does not involve the formation of a metal oxide, metal sulfide, metal selenide, metal telluride, metal hydroxide, or metal-halogen compound.

Abstract: A sodium ion battery comprises a cathode having a porous redox active metal-organic framework material. The battery can be an organic electrolyte sodium ion battery wherein the electrolyte comprises a sodium salt dissolved in an organic solvent or mixture of organic solvents. Alternatively, the battery can comprise an aqueous sodium ion battery wherein the electrolyte comprises a sodium salt dissolved in an aqueous solvent. Battery performance is especially related to electrolyte and binder selection.

Abstract: An exemplary embodiment of the present invention is a secondary battery which comprises a negative electrode and a battery electrolyte liquid comprising a supporting salt and a non-aqueous electrolyte solvent; wherein the negative electrode is obtained by pre-forming a SEI coating film on a negative electrode structure which is formed by binding a negative electrode active substance comprising a metal (a). that can be alloyed with lithium, a metal oxide (b) that can absorb and desorb lithium ion and a carbon material (c) that can absorb and desorb lithium ion, to a negative electrode current collector with a negative electrode binder, and wherein the non-aqueous electrolyte solvent contains at least an ionic liquid.

Abstract: An object of the present invention is to provide a secondary battery having high energy density with long-term life. The present invention relates to a secondary battery comprising a negative electrode comprising a silicon-containing compound and an electrolyte solution comprising a fluorine-containing ether compound, a fluorine-containing phosphoric acid ester, a sulfone compound and a cyclic carbonate compound in a predetermined amount respectively.

Abstract: An electrolyte for a lithium secondary battery, the electrolyte including: a lithium salt, an organic solvent, and an organic fluorinated ether compound represented by Formula 1: CF3—R1—O—CF2—CHF—(CH2)n—CF3??Formula 1 wherein, in Formula 1, R1 is a C1-C10 alkylene group, a C3-C10 cycloalkylene group, a C1-C10 fluorinated alkylene group, or a C3-C10 fluorinated cycloalkylene group; and n is an integer of 0 to 10.

Abstract: A silicon based micro-structured material and methods are shown. In one example, the silicon based micro-structured material is used as an electrode in a battery, such as a lithium ion battery, we have successfully demonstrated the first synthesis of a scalable carbon-coated silicon nanofiber paper for next generation binderless free-standing electrodes for Li-ion batteries that will significantly increase total capacity at the cell level. The excellent electrochemical performance coupled with the high degree of scalability rriake this material an idea candidate for next-generation anodes for electric vehicle applications. C-coated SiNF paper electrodes offer a highly feasible alternative to the traditional slurry-based approach to Li-ion battery electrodes through the elimination of carbon black, polymer binders, and metallic current collectors.