Abstract: Lithium-iron molecular precursor compounds, compositions and processes for making a cathode for lithium ion batteries. The molecular precursor compounds are soluble and provide processes to make stoichiometric cathode materials with solution-based processes. The cathode material can be, for example, a lithium iron oxide, a lithium iron phosphate, or a lithium iron silicate. Cathodes can be made as bulk material in a solid form or in solution, or in various forms including thin films.

Abstract: Provided is an electrode active material that is obtained by coating a surface of each particle of LiwAxDO4 (provided that, A represents at least one selected from the group consisting of Mn and Co, D represents one or more selected from the group consisting of P, Si, and S, 0<w?4, and 0<x?1.5) with a coating layer containing LiyE2PO4 (provided that, E represents at least one selected from the group consisting of Fe and Ni, 0<y?2, and 0<z?1.5) and a carbonaceous electron conductive material. The electrode active material of the invention may be obtained by drying slurry obtained by suspending particles of LiwAxDO4 in an aqueous solution containing a Li source, an E source, a PO4 source, and a carbon source, and by subjecting the resultant dried product to a heat treatment under a non-oxidizing atmosphere.

Abstract: Provided are a positive electrode slurry composition for a lithium secondary battery, which can be prepared by an improved preparation method by preventing slurry from being gelled by adding an inorganic additive in preparing slurry of a nickel (Ni) based positive active material, a lithium secondary battery comprising the same and a method of making the lithium secondary battery. The positive electrode slurry includes a nickel (Ni) based positive active material; a binder; and an inorganic additive.

Abstract: A solventless system for fabricating electrodes includes a mechanism for feeding a substrate through the system, a first application region comprised of a first device for applying a first layer to the substrate, wherein the first layer is comprised of an active material mixture and a binder, and the binder includes at least one of a thermoplastic material and a thermoset material, and the system includes a first heater positioned to heat the first layer.

Abstract: A positive active material for an alkaline secondary battery having a core layer containing nickel hydroxide and a conductive auxiliary layer which coats the surface of the core layer, wherein the conductive auxiliary layer contains a cobalt oxyhydroxide phase and a cerium dioxide phase, and the active material contains lithium.

Abstract: The present invention provides a positive electrode material for a nickel-zinc secondary battery, a positive electrode for a nickel-zinc secondary battery and a method for preparing the positive electrode. The positive electrode material for a nickel-zinc secondary battery provided by the present invention includes: 68 wt %˜69 wt % positive electrode active material, 0.6 wt %˜1 wt % yttrium oxide, 0.2 wt %˜0.6 wt % calcium hydroxide, 3.5 wt %˜4 wt % nickel powder, and a binder in balance; the positive electrode active material being a spherical nickel hydroxide coated with Co (III). The positive electrode material for a nickel-zinc secondary battery provided by the present invention contains no Co(II) ion and cadmium ion. The positive electrode prepared by the positive electrode material provided by the present invention can reduce the amount of hydrogen evolved in the battery while ensuring relatively high electrode charging/discharging capacity.

Abstract: The present invention is aimed to provide a complex electrode for a lithium ion battery, consisting of: an electro-conductive current collector with porous three-dimensional network construction, the electrode active materials filled in the porous current collector, and a porous ionic conductive polymer binder coated in the pores of the current collector holding the electrode materials. In the abovementioned lithium ion battery complex electrode construction, the current collector connects with the electrode active materials through its highly porous three-dimensional backbone network and thus greatly improves the utilization of the electrode active materials and obtains high area density and low impedance of the electrode. Another objective of this invention is to disclose a novel electrode fabrication technique for lithium ion batteries.

Abstract: There is provided an active material for a nonaqueous electrolyte secondary battery, including a lithium-transition metal composite oxide which has an ?-NaFeO2-type crystal structure and of which the average composition is represented by the composition formula of Li1+?Me1??O2 (Me is a transition metal containing Co, Ni and Mn; and ?>0), wherein the lithium-transition metal composite oxide is a particle having a core and a coated part, the cobalt concentration of the coated part is higher than the cobalt concentration of the core, the manganese concentration of the coated part is lower than the manganese concentration of the core, and the ratio of cobalt present in the coated part is 3 to 10% in terms of a molar ratio based on the amount of the transition metal present in the core.

Abstract: Growing spin-capable multi-walled carbon nanotube (MWCNT) forests in a repeatable fashion will become possible through understanding the critical factors affecting the forest growth. Here we show that the spinning capability depends on the alignment of adjacent MWCNTs in the forest which in turn results from the synergistic combination of a high areal density of MWCNTs and short distance between the MWCNTs. This can be realized by starting with both the proper Fe nanoparticle size and density which strongly depend on the sheet resistance of the catalyst film. Simple measurement of the sheet resistance can allow one to reliably predict the growth of spin-capable forests. The properties of pulled MWCNTs sheets reflect that there is a relationship between their electrical resistance and optical transmittance. Overlaying either 3, 5, or 10 sheets pulled out from a single forest produces much more repeatable characteristics.

Abstract: The present invention relates to a method for manufacturing slurry for coating of electrodes for use in lithium ion batteries, wherein the method comprises mixing active materials with a binder into a binder solution, and adding an organic carbonate to the binder solution to generate the slurry. The present invention also relates to a method for manufacturing electrodes for a lithium battery cell, wherein the method comprises mixing active materials with a binder into a binder solution, adding an organic carbonate to the binder solution to generate slurry, wherein the above adding step is carried out at temperature above melting temperature of the organic carbonate, coating electrode material with the slurry, drying the coating on the electrode material by drying the organic carbonate, and surface treatment of the slurry so that the electrode is prepared for use in a lithium ion battery cell. Further, the invention also relates to a method for manufacturing a lithium ion battery cell.

Abstract: An alkaline, rechargeable electrochemical cell includes a pasted electrode structure in which a composition comprising a paste matrix component includes cobalt in an amount greater than 6 weight percent ranging up to 14 weight percent. The matrix may also include a rare earth such as yttrium. The composition further includes particles of nickel hydroxide dispersed in the matrix, and these particles include cobalt levels ranging from greater than 8 atomic percent up to 15 atomic percent. Cells incorporating these materials have good charging efficiency at elevated temperatures.

Abstract: A lithium-ion battery including an electrodeposited anode material having a micron-scale, three-dimensional porous foam structure separated from interpenetrating cathode material that fills the void space of the porous foam structure by a thin solid-state electrolyte which has been reductively polymerized onto the anode material in a uniform and pinhole free manner, which will significantly reduce the distance which the Li-ions are required to traverse upon the charge/discharge of the battery cell over other types of Li-ion cell designs, and a procedure for fabricating the battery are described. The interpenetrating three-dimensional structure of the cell will also provide larger energy densities than conventional solid-state Li-ion cells based on thin-film technologies. The electrodeposited anode may include an intermetallic composition effective for reversibly intercalating Li-ions.

Abstract: A process of forming and the resulting nano-pitted metal substrate that serves both as patterns to grow nanostructured materials and as current collectors for the resulting nanostructured material is disclosed herein. The nano-pitted substrate can be fabricated from any suitable conductive material that allows nanostructured electrodes to be grown directly on the substrate.

Abstract: An electrochromic device comprising a counter electrode layer comprised of lithium metal oxide which provides a high transmission in the fully intercalated state and which is capable of long-term stability, is disclosed. Methods of making an electrochromic device comprising such a counter electrode are also disclosed.

Abstract: The present invention discloses a filter for removing noise, which includes: a lower magnetic body; an insulating layer provided on the lower magnetic body and including at least one conductor pattern; and an upper magnetic body including a primary ferrite composite provided on the insulating layer and a secondary ferrite composite provided on the primary ferrite composite to cover a pore formed on a surface of the primary ferrite composite, and a method of manufacturing the same. According to the present invention, it is possible to implement a filter for removing noise with high performance and characteristics by increasing magnetic permeability and improving impedance characteristics through simple structure and process.

Abstract: The positive electrode active material layer includes a plurality of particles of a positive electrode active material and a reaction mixture where reduced graphene oxide is bonded to a polymer having a functional group as a side chain. The reduced graphene oxide has a sheet-like shape and high conductivity and thus functions as a conductive additive by being in contact with the plurality of particles of the positive electrode active material. The reaction mixture serves as an excellent binder since the reduced graphene oxide is bonded to the polymer. Therefore, even a small amount of the reaction mixture where the reduced graphene oxide is covalently bonded to the polymer excellently serves as a conductive additive and a binder.

Abstract: To provide a positive electrode for a lithium-ion secondary battery, which is highly filled with a positive electrode active material and has a high-density positive electrode active material layer. To provide a lithium-ion secondary battery having high capacity and improved cycle characteristics with use of the positive electrode. After graphene oxide is dispersed in a dispersion medium, a positive electrode active material is added and mixed to form a mixture. A binder is added to the mixture and mixed to form a positive electrode paste. The positive electrode paste is applied to a positive electrode current collector and the dispersion medium contained in the positive electrode paste is evaporated, and then, the graphene oxide is reduced, so that a positive electrode active material layer containing graphene is formed over the positive electrode current collector.

Abstract: The negative electrode for aqueous solution electrolysis of the present invention includes a conductive substrate having a nickel surface, a mixture layer including metal nickel, a nickel oxide and carbon atoms, formed on the conductive substrate surface, and an electrode catalyst layer formed on the mixture layer surface, wherein the electrode catalyst layer is formed by a layer including a platinum group metal or a platinum group metal compound. The negative electrode for aqueous solution electrolysis of the present invention is preferably used in electrolysis of an aqueous solution of an alkali metal halide, and the like.

Abstract: There are provided a multilayered ceramic electronic component and a method of fabricating the same. The multilayered ceramic electronic component includes: a ceramic main body; external electrodes; and inner conductors forming a structure of a coil within the ceramic main body, wherein a central axis of the coil is in parallel to the direction in which the external electrodes are connected, and the inner conductors include via conductors laminated to be perpendicular to the central axis of the coil and a ratio of the area of one face of the via conductor to the area of the other face of the via conductor ranges from 0.9 to 1.1.

Abstract: A method of making a battery electrode includes the steps of dispersing an active electrode material and a conductive additive in water with at least one dispersant to create a mixed dispersion; treating a surface of a current collector to raise the surface energy of the surface to at least the surface tension of the mixed dispersion; depositing the dispersed active electrode material and conductive additive on a current collector; and heating the coated surface to remove water from the coating.

Abstract: A method for making a composite electrode for a lithium ion battery comprises the steps of: preparing a slurry containing particles of inorganic electrode material(s) suspended in a solvent; preheating a porous metallic substrate; loading the metallic substrate with the slurry; baking the loaded substrate at a first temperature; curing the baked substrate at a second temperature sufficient to form a desired nanocrystalline material within the pores of the substrate; calendaring the cured composite to reduce internal porosity; and, annealing the calendared composite at a third temperature to produce a self-supporting multiphase electrode. Because of the calendaring step, the resulting electrode is self-supporting, has improved current collecting properties, and improved cycling lifetime. Anodes and cathodes made by the process, and batteries using them, are also disclosed.

Abstract: An active material for a battery includes an electrochemically reversibly oxidizable and reducible base material selected from the group consisting of a metal, a lithium-containing alloy, a sulfur-based compound, and a compound that can reversibly form a lithium-containing compound by a reaction with lithium ions and a surface-treatment layer formed on the base material and comprising a compound of the formula MXOk, wherein M is at least one element selected from the group consisting of an alkali metal, an alkaline earth metal, a group 13 element, a group 14 element, a transition metal, and a rare-earth element, X is an element that is capable of forming a double bond with oxygen, k is a numerical value in the range of 2 to 4.

Abstract: Methods and compositions for depositing a cobalt containing film on one or more substrates are disclosed herein. A cobalt precursor, which comprises at least one pentadienyl ligand coupled to the cobalt for thermal stability, is introduced into a reaction chamber containing one or more substrates, and the cobalt precursor is deposited to form a cobalt containing film onto the substrate.

Abstract: A cathode material of a lithium ion secondary battery is provided, which includes a cathode active material and a glassy material coating on a surface of the cathode active material. The glassy material is capable of selectively allowing lithium ions to pass therethrough. The lithium ion secondary battery using the cathode material has the long cycle life and the high safety performance.

Abstract: In a lithium secondary battery provided by the present invention, a positive electrode active material is constituted by a lithium composite oxide having at least lithium, nickel, and/or cobalt as main constituent elements, a porosity of a positive electrode active material layer is 30% or more and 40% or less, and a porosity of a negative electrode active material layer is 30% or more and 45% or less. Further, a void volume ratio (Sa/Sb) between a void volume (Sa) per unit area of the positive electrode active material layer and a void volume (Sb) per unit area of the negative electrode active material layer satisfies 0.9?(Sa/Sb)?1.4.

Abstract: A positive electrode material that can form a positive electrode mixture containing composition with reduced changes over time and high productivity, a manufacturing method thereof, a non-aqueous rechargeable battery less likely to swell and having a high storage characteristic during storage at high temperatures, and a positive electrode that can form the battery are provided. The object is solved by providing a positive electrode material having a coating layer of an organic silane compound on a surface of a positive electrode active material made of a lithium nickel composite oxide represented by the general compositional formula (1): Li1+xMO2 where ?0.5?x?0.5, M represents a group of at least two elements including at least one of Mn and Co and Ni, and 20?a?100 and 50?a+b+c?100 when the ratios (mol %) of Ni, Mn, and Co in the elements forming M are a, b, and c, respectively.

Abstract: One example includes a sensor for sensing NOX, including an electrically insulating substrate, a first electrode and a second electrode, each disposed onto the substrate, wherein each of the first electrode and the second electrode has a first end configured to receive a current and a second end and a sensor element formed of nickel oxide powder, the sensor element disposed on the substrate in electrical communication with the second ends of the first electrode and the second electrode. In some examples, electronics are used to measure the change in electrical resistance of a sensor in association with NOx concentration near the sensor. In some examples, the sensor is maintained at 575° C.

Abstract: Provided is a precursor for the preparation of a lithium transition metal oxide that is used for the preparation of a lithium transition metal oxide as a cathode active material for a lithium secondary battery, through a reaction with a lithium-containing compound, wherein the precursor contains two or more transition metals, and sulfate ion (SO4)-containing salt ions derived from a transition metal salt for the preparation of the precursor have a content of 0.1 to 0.7% by weight, based on the total weight of the precursor.

Abstract: A coating for a current collector for a rechargeable electrochemical cell comprising a water-soluble polymeric material that provides suitable binding and coating characteristics without the need for a thickening agent or any external reagent to control the viscosity of the electrode active mix. Multiple water-based polymeric materials are disclosed. Also disclosed is an electrode active mix that is devoid of any thickening agent or any external reagent to control the viscosity of the electrode active mix.

Abstract: Provided are a positive electrode active material, a lithium ion electric storage device using the same, and a manufacturing method thereof. The positive electrode active material contains (1) lithium nickel cobalt manganese oxide, and at least one type of a lithium ion acceptance capacity adjustment compound selected from (2a) lithium vanadium composite oxide, vanadium oxide, lithium vanadium phosphate, and lithium vanadium fluorophosphate and (2b) Nb2O5, TiO2, Li3/4Ti5/3O4, WO2, MoO2, and Fe2O3. The lithium ion electric storage device contains this positive electrode active material.

Abstract: Prior electrochromic devices frequently suffer from high levels of defectivity. The defects may be manifest as pin holes or spots where the electrochromic transition is impaired. This is unacceptable for many applications such as electrochromic architectural glass. Improved electrochromic devices with low defectivity can be fabricated by depositing certain layered components of the electrochromic device in a single integrated deposition system. While these layers are being deposited and/or treated on a substrate, for example a glass window, the substrate never leaves a controlled ambient environment, for example a low pressure controlled atmosphere having very low levels of particles. These layers may be deposited using physical vapor deposition.

Abstract: Methods of making and compositions of dense sintered ceramic nano- and micro-composite materials that are highly stable in a variety of conditions and exhibit superior toughness and strength. Liquid feed flame spray pyrolysis techniques form a plurality of nanoparticles (e.g., powder), each having a core region including a first metal oxide composition comprising Ce and/or Zr or other metals and a shell region including a second metal oxide composition comprising Al or other metals. In certain aspects, the core region comprises a partially stabilized tetragonal ZrO2 and the shell region comprises an ?-Al2O3 phase. The average actual density of the ceramic after sintering is greater than 50% and up to or exceeding 90% of a theoretical density of the ceramic.

Abstract: Provided are a ferroelectric material having good ferroelectricity and good insulation property, and a ferroelectric device using the ferroelectric material. In the present invention, the ferroelectric material includes a metal oxide having a perovskite-type crystal structure, in which: the metal oxide contains bismuth ferrite whose iron is substituted by manganese, and at least one of a copper oxide and a nickel oxide; the bismuth ferrite is substituted by manganese at a substitution ratio of 0.5 at. % or more to 20 at. % or less with respect to a total amount of iron and manganese; and at least one of the copper oxide and the nickel oxide is added in an amount of 0.5 mol % or more to 20 mol % or less with respect to the bismuth ferrite whose iron is substituted by manganese.

Abstract: The invention features a method of forming a metal phosphate coated cathode. Either a metal salt or a phosphate salt is dissolved in a nonaqueous solvent to form a first solution. The other of the metal salt or the phosphate salt (e.g., whichever compound is not dissolved in the nonaqueous solvent) is dissolved in a second solvent to form a second solution. The first solution and the second solution are mixed to form a precursor solution. A cathode material is added to the precursor solution to form a cathode-precursor solution. The cathode-precursor solution is dried to form the metal phosphate coated cathode.

Abstract: Gas-sensitive materials are disclosed which are mixtures or composites of BaSnO3, and another component comprising one or more phases from the group: CuO, Cr2O3, Fe2O3, MnO, NiO, CoO, Bi2O3, Sb2O3, Sb2O5, WO3, ZnO, and SnO2. The mixture may be modified further by the addition in a highly dispersed manner of fine (less than about 20 nm) particulates of precious metals (Pt, Pd, Au, Ag) to enhance performance. Advantages include: (a) sensitivity in the range 1-2500 ppm NOx typical of combustion environments, (b) reduced humidity influence, (c) repeatability and reliability, and (d) baseline stability over time. In one embodiment, the material includes a mixture of BaSnO3 and CuO such that CuO is present at 25-50 mol %.

Abstract: A transition metal/carbon nanotube composite includes a carbon nanotube and a transition metal oxide coating layer disposed on the carbon nanotube. The transition metal oxide coating layer includes a nickel-cobalt oxide.

Abstract: Separator-electrode assemblies (SEAs) comprise a porous electrode useful as a positive or negative electrode, in a lithium battery and a separator layer applied to this electrode, the separator layer being an inorganic separator layer comprising at least two fractions of metal oxide particles different from each other in their average particle size and/or in the metal, and the electrode having active mass particles are bonded together and to the current collector by inorganic adhesive; and a process for their production.

Abstract: A method for applying an electrode mixture paste includes unwinding a core material wound in a coil shape; applying an electrode mixture paste to both sides of the core material; adjusting an application amount of the electrode mixture paste; drying a paste-coated sheet with the electrode mixture paste applied to the both sides thereof; and winding the paste-coated sheet in a coil shape. The electrode mixture paste is circulated and supplied by a circulation means having a storage function and a stirring function. The application method can achieve stable application accuracy even when a paste-coated sheet is continuously produced using a plurality of lots of electrode mixture pastes containing different types of powders having a large difference in the specific gravity.

Abstract: An electrode manufacturing apparatus comprises a conveying section for conveying a current collector sheet having a plurality of through holes; a backup roll for guiding the conveyed current collector sheet; an applicator for supplying a coating liquid to the current collector sheet on the backup roll; and a nip roll for pressing a part of the current collector sheet where the coating liquid is not supplied yet from the applicator against the backup roll.

Abstract: A cathode, a method of forming the cathode and a lithium battery including the cathode. The cathode includes a current collector and a cathode active material layer disposed on the current collector; the cathode active material layer includes a lithium transition metal oxide having a spinel structure, a conductive agent, and a binder; and at least a portion of a surface of the cathode active material layer is fluorinated.

Abstract: A positive electrode includes positive active material, conductive additive, water soluble polymer, water coated on the current collector. The slurry includes an active material, a water soluble binder, water, and a carboxylic acid-containing polymer sufficient to reduce the pH of the liquid slurry to a level below about 11.8. A method of forming an electrode is also disclosed.

Abstract: To smoothly deliver a thermal energy required in an active site of a catalyst carried on a carrier. A method of manufacturing a catalyst carrier of the present invention includes the steps of: forming a mixed thin film in which at least metal and ceramics are mixed on a metal base, by spraying aerosol, with metal powders and ceramic powders mixed therein, on the metal base; and making the mixed thin film porous, by dissolving the metal of the mixed thin film into acid or alkaline solution to remove this metal.

Abstract: The present invention provides a gas sensor, including: a sensor substrate provided with an electrode; and a thin layer of sensor material formed by spraying a solution in which metal oxide nanoparticles are dispersed onto the sensor substrate. The gas sensor is advantageous in that a sensor material is formed into a porous thin layer containing metal oxide nanoparticles having a large specific surface area, thus realizing high sensitivity on the ppb scale and a high reaction rate. Further, the gas sensor is advantageous in that it can be manufactured at room temperature, and the thickness of a sensor material can be easily adjusted by adjusting the spray time, so that a thin gas sensor or a thick gas sensor can be easily manufactured.

Abstract: A process for producing a separator-electrode assemblies (SEAs) which comprises a porous electrode useful as a positive or negative electrode in a lithium battery and a separator layer applied to this electrode wherein the separator layer being an inorganic separator layer comprising at least two fractions of metal oxide particles different from each other in their average particle size and/or in the metal, and the electrode having active mass particles that are bonded together and to a current collector by an inorganic adhesive; and the separator-electrode assembly comprises no organic polymer binder. The process comprising form the porous electrode by applying a suspension comprising active mass particles suspended in a sol or a dispersion of nanoscale active mass particles in a solvent and solidifying the suspension.

Abstract: A lithium secondary battery (10) provided by the present invention has an iron oxide film-coated electrode employing a configuration in which an iron oxide film (144) capable of reversibly absorbing and desorbing lithium is retained on an electrically conductive base (142). The electrically conductive base (142) has a roughened surface having a surface roughness Rz of 3 ?m or more, and the iron oxide film (144) is provided on the roughened surface.

Abstract: The main object of the present invention is to provide a method for producing a cathode active material layer, which allows a high-purity lithium complex oxide by restraining impurities from being produced, allows a flat film, and allows orientation control. The present invention solves the above-mentioned problems by providing a method for producing a cathode active material layer, in which a cathode active material layer is formed on a substrate and contains LiXaOb (X is a transition metal element of at least one kind selected from the group consisting of Co, Ni and Mn, a=0.7-1.3, and b=1.5-2.5), characterized in that the method comprises the steps of: forming a cathode active material precursor-film on the above-mentioned substrate by a physical vapor deposition method while setting a temperature of the substrate at 300° C.

Abstract: A positive electrode active material includes: a secondary particle obtained upon aggregation of a primary particle that is a lithium complex oxide particle in which at least nickel (Ni) and cobalt (Co) are solid-solved as transition metals, wherein an average composition of the whole of the secondary particle is represented by the following formula (1): LixCoyNizM1-y-zOb-aXa ??Formula (1) wherein an existent amount of cobalt (Co) becomes large from a center of the primary particle toward the surface thereof; and an existent amount of cobalt (Co) in the primary particle existing in the vicinity of the surface of the secondary particle is larger than an existent amount of cobalt (Co) in the primary particle existing in the vicinity of the center of the secondary particle.

Abstract: An electrode material is created by forming a thin coating or small deposits of metal oxide as an intercalation host on a carbon powder. The carbon powder performs a role in the synthesis of the oxide coating, in providing a three-dimensional, electronically conductive substrate supporting the metal oxide, and as an energy storage contribution material through ion adsorption or intercalation. The metal oxide includes one or more metal oxides. The electrode material, a process for producing said electrode material, an electrochemical capacitor and an electrochemical secondary (rechargeable) battery using said electrode material is disclosed.

Abstract: A production method for a positive electrode for a nonaqueous electrolyte secondary battery that includes a positive electrode active material capable of intercalating and deintercalating a lithium ion, a conductive agent and a binder, in which the positive electrode active material is produced by coating cobalt-based lithium composite oxide represented by a general formula: LiaCO1-sM1sO2 with lithium nickel cobalt manganese oxide of general formula: LibNitCOuMnvO2, ratio r1/r2 of the average particle diameter r1 of the cobalt-based lithium composite oxide and the average particle diameter r2 of the lithium nickel cobalt manganese oxide being 2?r1/r2?50, and the average particle diameter r2 of the lithium nickel cobalt manganese oxide is 0.5 ?m?r2?20 ?m. A positive electrode produced by such method results in a nonaqueous electrolyte secondary battery having enhanced energy density and capacity and retention characteristic when charging/discharging is repeated at a high potential of 4.5 V based on lithium.

Abstract: Disclosed is a positive active material for a rechargeable lithium battery. The positive active material includes a core and a surface-treatment layer on the core. The core includes at least one lithiated compound and the surface-treatment layer includes at least one coating material selected from the group consisting of coating element included-hydroxides, oxyhydroxides, oxycarbonates, hydroxycarbonates and any mixture thereof.