Abstract: A negative active material and a lithium battery are provided. The negative active material includes a composite core, and a coating layer formed on at least part of the composite core. The composite core includes a carbonaceous base and a metal/metalloid nanostructure disposed on the carbonaceous base. The coating layer includes a metal oxide coating layer and an amorphous carbonaceous coating layer.

Abstract: A negative active material includes a conductive unit bound in island-like form to silicon-based nanowires on a carbonaceous base. Such negative active material may improve the electrical conductivity of the silicon-based nanowires, and suppress separation of the silicon-based nanowires caused from volume expansion, and thus may improve lifetime characteristics of a lithium battery.

Abstract: Disclosed are a cathode active material for lithium secondary batteries, a method for preparing the same, and lithium secondary batteries comprising the same. The cathode active material for lithium secondary batteries comprises a lithium metal oxide secondary particle core formed by aggregation of a plurality of lithium metal oxide primary particles; a first shell formed by coating the surface of the secondary particle core with a plurality of barium titanate particles and a plurality of metal oxide particles; and a second shell formed by coating the surface of the first shell with a plurality of olivine-type lithium iron phosphate oxide particles and a plurality of conductive material particles. The cathode active material for lithium secondary batteries allows manufacture of lithium secondary batteries having excellent thermal stability, high-temperature durability and overcharge safety.

Abstract: An electrode material for use in an electrochemical cell, like a lithium-ion battery, is provided. The electrode material may be a negative electrode comprising graphite, silicon, silicon-alloys, or tin-alloys, for example. By avoiding deposition of transition metals, the battery substantially avoids charge capacity fade during operation. The surface coating is particularly useful with negative electrodes to minimize or prevent deposition of transition metals thereon in the electrochemical cell. The coating has a thickness of less than or equal to about 40 nm. Methods for making such materials and using such coatings to minimize transition metal deposition in electrochemical cells are likewise provided.

Abstract: The purpose of the present invention is to provide a zinc negative electrode mixture for forming negative electrodes of safe and economic batteries exhibiting excellent battery performance; and a gel electrolyte or a negative electrode mixture which can be suitably used for forming a storage battery exhibiting excellent battery performance such as a high cycle characteristic, rate characteristic, and coulombic efficiency while suppressing change in form, such as shape change and dendrite, and passivation of the electrode active material. Another purpose of the present invention is to provide a battery including the zinc negative electrode mixture or the gel electrolyte. (1) The zinc negative electrode mixture contains a zinc-containing compound and a conductive auxiliary agent. The zinc-containing compound and/or the conductive auxiliary agent contain(s) particles having an average particle size of 1000 ?m or smaller and/or particles having an aspect ratio (vertical/lateral) of 1.1 or higher.

Abstract: A cathode active material including a lithium metal oxide composite having a first domain and a second domain and represented by Formula 1: x[Li2-y(M1)1-z(M2)y+zO3]-(1?x)[LiMeO2]??Formula 1 wherein 0<x<1, 0?y<1, 0?z<1, 0<y+z<1, M1 includes at least one transition metal, M2 includes at least one metal selected from magnesium (Mg), aluminum (Al), vanadium (V), zinc (Zn), molybdenum (Mo), niobium (Nb), lanthanum (La), and ruthenium (Ru), and Me includes at least one metal selected from nickel (Ni), cobalt (Co), manganese (Mn), iron (Fe), chromium (Cr), titanium (Ti), copper (Cu), aluminum (Al), magnesium (Mg), zirconium (Zr), and boron (B).

Abstract: A positive electrode active material comprising a lithium rich metal oxide active composition coated with aluminum zinc oxide coating composition is disclosed. The aluminum zinc oxide can be represented by the formula AlxZn1-3x/2O, where x is from about 0.01 to about 0.6. In some embodiments, the material can have an average voltage that is very stable with cycling, and a specific capacity of at least about 175 mAh/g and an average voltage of at least about 3.55V discharged at a rate of C/3 from 4.6V to 2V against lithium. The material can further comprise an overcoat of metal halide over the aluminum zinc oxide coating. In some embodiments, the material can have from about 1 mole percent to about 15 mole percent aluminum zinc oxide coating and from about 0.5 mole percent to about 3 mole percent aluminum halide overcoat.

Abstract: A composition comprising at least one graphene-supported metal oxide monolith, said monolith comprising a three-dimensional structure of graphene sheets crosslinked by covalent carbon bonds, wherein the graphene sheets are coated by at least one metal oxide such as iron oxide or titanium oxide. Also provided is an electrode comprising the aforementioned graphene-supported metal oxide monolith, wherein the electrode can be substantially free of any carbon-black and substantially free of any binder.

Abstract: Disclosed is a negative active material for a rechargeable lithium battery is provided that includes composite particles including an amorphous or semi-crystalline carbon matrix, and crystalline graphite powder particles having an average particle diameter of 0.2 to 3 ?m dispersed in the matrix. The composite particles have an average particle diameter of 4 to 40 ?m. A method of preparing the same and a rechargeable lithium battery including the negative active material are also disclosed.

Abstract: Provided are a composite for an anode active material and a method of preparing the same. More particularly, the present invention provides a composite for an anode active material including a (semi) metal oxide and an amorphous carbon layer on a surface of the (semi) metal oxide, wherein the amorphous carbon layer comprises a conductive agent, and a method of preparing the composite.

Abstract: Provided are a composite and a method of preparing an anode slurry including the same. More particularly, the present invention provides a composite including a (semi) metal oxide, a conductive material on a surface of the (semi) metal oxide, and a binder, and a method of preparing an anode slurry including preparing a composite by dispersing a conductive material in an aqueous binder and then mixing with a (semi) metal oxide, and mixing the composite with a carbon material and a non-aqueous binder.

Abstract: A secondary hybrid aqueous energy storage device includes an anode electrode, a cathode electrode which is capable of reversibly intercalating sodium cations, a separator, and a sodium cation containing aqueous electrolyte, wherein an initial active cathode electrode material comprises an alkali metal containing active cathode electrode material which deintercalates alkali metal ions during initial charging of the device.

Abstract: Provided are a porous composite expressed by Chemical Formula 1 and having a porosity of 5% to 90%, and a method of preparing the same: MOx??<Chemical Formula 1> where M and x are the same as described in the specification. According to the present invention, since a molar ratio (x) of oxygen to a molar ratio of (semi) metal in the porous composite is controlled, an initial efficiency of a secondary battery may be increased. Also, since the porous composite satisfies the above porosity, a thickness change rate of an electrode generated during charge and discharge of the secondary battery may be decreased and lifetime characteristics may be improved.

Abstract: The present disclosure describes, among other things, new layered molybdenum oxides for lithium ion battery cathodes from solid solutions of Li2MoO3 and LiCrO2. These materials display high energy density, good rate capability, great safety against oxygen release at charged state due mostly to their low voltage. Therefore, these materials have properties desirable for lithium ion battery cathodes.

Abstract: A secondary battery includes: a cathode; an anode; and an electrolytic solution. The anode includes a lithium composite oxide represented by following Formula (1), LiwZnxSnyMzO4??(1) where M is one or more of Co, Mg, Ni, Ca, Al, Ti, V, Cr, Mn, Fe, Cu, and Ag; and w to z satisfy 0.3?w?1, 0.3?x?1, 0.8?y?1.2, and (w+x+y+z)=3.

Abstract: A composite cathode active material, a method of preparing the composite cathode active material, and a cathode and a lithium battery each including the composite cathode active material. The composite cathode active material includes a core including a lithium intercalatable oxide which enables intercalation and deintercalation of lithium; and a coating layer disposed on at least a portion of the core, wherein the conductive layer includes a lithium metal oxide which is an inactive lithium ion conductor, and wherein the lithium metal oxide contains a metal which has an atomic weight of 27 Daltons or more and is selected an element of Groups 3 to 14 of the Periodic Table of the Elements.

Abstract: A compound of the general formula (I) AaMbPcOd??(I) in which the variables are each defined as follows: M is at least one transition metal selected from Co, Ni, Mn, Fe and Cr, A is Li or LixNa1-x where x is in the range from 0.2 to 1.0, a is in the range from 3.5 to 4.5, b is in the range from 0.8 to 1.2, c is in the range from 1.8 to 2.2 and d is in the range from 7.2 to 8.8.

Abstract: A positive active material including: a lithium-containing oxide, and a lithium-intercalatable phosphate compound disposed on the lithium-containing oxide.

Abstract: An electrode material containing an electrode active material, and a carbonaceous coating film which covers the electrode active material and contains sulfur; and an electrode material including a secondary particle including a plurality of primary particles as the electrode active material, wherein the primary particles are covered with a carbonaceous coating film so that the carbonaceous coating film is interposed between the primary particles and the carbonaceous coating film contains sulfur.

Abstract: This disclosure provides a positive electrode active lithium-excess metal oxide with composition LixMyO2 (0.6?y?0.85 and 0?x+y?2) for a lithium secondary battery with a high reversible capacity that is insensitive with respect to cation-disorder. The material exhibits a high capacity without the requirement of overcharge during the first cycles.

Abstract: A cathode composite material includes a cathode active material and a coating layer coated on a surface of the cathode active material. The cathode active material includes a layered type lithium transition metal oxide. A material of the coating layer is a lithium metal oxide having a crystal structure belonging to C2/c space group of the monoclinic crystal system. The present disclosure also relates to a lithium ion battery including the cathode composite material.

Abstract: A composite cathode active material, a cathode including the same, a lithium battery including the cathode, and preparation method thereof are disclosed. The composite cathode active material includes: a core capable of intercalating and deintercalating lithium; and a crystalline coating layer disposed on at least part of a surface of the core, wherein the coating layer include a metal oxide.

Abstract: A nonaqueous electrolyte secondary battery, having an internal resistance of 10 m? or less as an alternating-current impedance value of 1 kHz, comprises a metal outer container, a nonaqueous electrolyte contained in the container, a positive electrode contained in the container, a negative electrode contained in the container, a separator interposed between the negative electrode and the positive electrode, a negative electrode lead having one end connected to the negative electrode, and a negative electrode terminal attached to the outer container so as to be connected electrically to the other end of the negative electrode lead, at least the surface of the negative electrode terminal which is connected to the negative electrode lead being formed of aluminum alloy with an aluminum purity of less than 99 wt. % containing at least one metal selected from the group consisting of Mg, Cr, Mn, Cu, Si, Fe and Ni.

Abstract: In an aspect, a composite anode active material including lithium titanium oxide particles; and a TiN, and TiN a method of preparing the composite anode active material, and a lithium battery including the composite anode active material is provided.

Abstract: In an aspect, a composite anode active material including a lithium titanium oxide; and phosphates, a method of preparing the composite anode active material, and a lithium battery including the composite anode active material is provided.

Abstract: A composite anode active material, an anode and a lithium battery each including the composite anode active material, and a method of preparing the composite anode active material. The composite anode active material includes a composite core, and a coating layer covering at least a region of the composite core, wherein the composite core includes a carbonaceous substrate and a metal/semi-metal nanostructure on the carbonaceous substrate, the coating layer is more predominant on the nanostructure than on the carbonaceous substrate, and the coating layer includes a metal oxide.

Abstract: In an aspect, a composite anode active material including a composite core; and a coating layer covering at least a region of the composite core, wherein the composite core comprises a carbonaceous substrate; and a nanostructure disposed on the substrate, and the coating layer includes a metal oxide; an anode and a lithium battery each including the composite anode active material; and a method of preparing the composite anode active material are provided.

Abstract: Provided is an anode active material including lithium metal oxide particles having an internal porosity ranging from 3% to 8% and an average particle diameter (D50) ranging from 5 ?m to 12 ?m. According to the present invention, since the high-density lithium metal oxide particles are included, the adhesion to an anode may be significantly improved even by using the same or smaller amount of a binder that is required during the preparation of an anode slurry, and high rate characteristics of a secondary battery may be improved by decreasing the average particle diameter of the lithium metal oxide particles.

Abstract: The present invention relates to a cathode active material for a lithium secondary battery comprising: a core including a compound represented by chemical formula 1, and a shell including a compound represented by chemical formula 2, wherein the material composition of the core and the material composition of the shell are different; and a lithium secondary battery including the cathode active material for a lithium secondary battery.

Abstract: (A) A cathode active material of a cathode includes a lithium phosphate compound represented by LiaM1bPO4 (M is Fe and the like, 0?a?2, b?1). (B) Fine pore distribution of the cathode measured by a mercury intrusion method indicates a peak P1 in a range where a pore diameter is equal to or more than about 0.01 micrometers and less than about 0.15 micrometers, and indicates a peak P2 in a range where the pore diameter is from about 0.15 micrometers to about 0.9 micrometers both inclusive. (C) A ratio I2/I1 between intensity I1 of the peak P1 and intensity I2 of the peak P2 is from about 0.5 to about 20 both inclusive. (D) Porosity of the cathode is from about 30 percent to about 50 percent both inclusive.

Abstract: A secondary electrochemical cell comprises an anode, a cathode including electrochemically active cathode material, a separator between the anode and the cathode, and an electrolyte. The electrolyte comprises at least one salt dissolved in at least one organic solvent. The separator in combination with the electrolyte has an area-specific resistance of less than about 2 ohm-cm2.

Abstract: An alkaline electrochemical cell comprising a negative electrode, wherein the negative electrode includes zinc as an active material and further includes a synergistic combination of a solid zinc oxide and a surfactant. More particularly, the invention discloses an alkaline electrochemical cell that is capable of providing improved service when utilized by high drain devices.

Abstract: Disclosed is an anode active material comprising a lithium metal oxide represented by the following Formula 1, wherein the anode active material is surface-coated with a silane compound and a silicon content of the silane compound is 0.01 to 5% by weight, based on the total amount of the anode active material: LiaM?bO4?cAc??(1) wherein M? is at least one element selected from the group consisting of Ti, Sn, Cu, Pb, Sb, Zn, Fe, In, Al and Zr; a and b are determined according to an oxidation number of M? within ranges of 0.1?a?4 and 0.2?b?4; c is determined according to an oxidation number within a range of 0?c<0.2; and A is at least one monovalent or bivalent anion. Disclosed is also a secondary battery comprising the same.

Abstract: Thin-film electrodes and battery cells, and methods of fabrication. A thin film electrode may be fabricated from a non-metallic, non-conductive porous support structure having pores with micrometer-range diameters. The support may include a polymer film. A first surface of the support is metalized, and the pores are partially metallized to create metal tubes having a thickness within a range of 50 to 150 nanometers, in contact with the metal layer. An active material is disposed within metalized portions of the pores. An electrolyte is disposed within non-metalized portions of the pores. Active materials may be selected to create an anode and a cathode. Non-metalized surfaces of the anode and cathode may be contacted to one another to form a battery cell, with the non-metalized electrolyte-containing portions of the anode facing the electrolyte-containing portions of the cathode pores. A battery cell may be fabricated as, for example, a nickel-zinc battery cell.

Abstract: The non-aqueous secondary battery of the present invention includes a positive electrode, a negative electrode, a non-aqueous electrolyte, and a separator, the negative electrode contains a negative electrode active material containing a graphitic carbon material and a composite in which a carbon coating layer is formed on a surface of a core material containing Si and O as constituent elements, the composite has a carbon content of 10 to 30 mass %, the composite has an intensity ratio I510/I1343 of a peak intensity I510 at 510 cm?1 derived from Si to a peak intensity I1343 at 1343 cm?1 derived from carbon of 0.25 or less when a Raman spectrum of the composite is measured at a laser wavelength of 532 nm, and the half-width of the (111) diffraction peak of Si is less than 3.0° when the crystallite size of an Si phase contained in the core material is measured by X-ray diffractometry using CuK? radiation.

Abstract: The present invention provides an electrode material in which unevenness in a supporting amount of a carbonaceous film is less when using an electrode-active material having a carbonaceous film on a surface thereof as the electrode material, and which is capable of improving conductivity, and a method for producing the electrode material. The electrode material includes an aggregate formed by aggregating an electrode-active material in which a carbonaceous film is formed on a surface. In the electrode material, an average particle size of the aggregate is 0.5 to 100 ?m, a volume density of the aggregate is 50 to 80 vol % of a volume density in a case in which the aggregate is a solid, and 80% or more of the surface of the electrode-active material is covered with the carbonaceous film. Alternatively, the electrode material includes an aggregate formed by aggregating electrode-active material particles in which a carbonaceous film is formed on a surface.

Abstract: A negative active material, a method of preparing the negative active material and a lithium ion battery comprising the negative active material are provided. The negative active material may comprise: a core (1) composed of a carbon material; and a plurality of composite materials (2) attached to a surface of the core (1), each of which may comprise a first material (21) and a second material (22) coated on the first material (21), in which the first material (21) may be at least one selected from the elements that may form an alloy with lithium, and the second material (22) may be at least one selected from the group consisting of transition metal oxides, transition metal nitrides and transition metal sulfides.

Abstract: According to one embodiment, a substrate includes a semiconductor layer. The semiconductor layer comprises tungsten oxide particles having a first peak in a range of 268 to 274 cm?1, a second peak in a range of 630 to 720 cm?1, and a third peak in a range of 800 to 810 cm?1 in Raman spectroscopic analysis. The semiconductor layer has a thickness of 1 ?m or more. The semiconductor layer has a porosity of 20 to 80 vol %.

Abstract: The present technology is able to provide a solid electrolyte cell that uses a positive electrode active material which has a high ionic conductivity in an amorphous state, and a positive electrode active material which has a high ionic conductivity in an amorphous state. The solid electrolyte cell has a stacked body, in which, a positive electrode side current collector film, a positive electrode active material film, a solid electrolyte film, a negative electrode potential formation layer and a negative electrode side current collector film are stacked, in this order, on a substrate. The positive electrode active material film is made up with an amorphous-state lithium phosphate compound that contains Li; P; an element M1 selected from Ni, Co, Mn, Au, Ag, and Pd; and O, for example.

Abstract: A cathode active material capable of obtaining a high capacity and capable of improving stability or low-temperature characteristics, a method of manufacturing the same, and a battery are provided. A cathode (21) includes a cathode active material including a lithium complex oxide including Li and at least one kind selected from the group consisting of Co, Ni and Mn, and P and at least one kind selected from the group consisting of Ni, Co, Mn, Fe, Al, Mg and Zn as coating elements on a surface of the lithium complex oxide. Preferably, the contents of the coating elements are higher on the surface of the cathode active material than those in the interior thereof, and decrease from the surface to the interior.

Abstract: A negative active material, a method for preparing the negative active material and a lithium ion battery comprising the same are provided. The negative active material may comprise: a core, an intermediate layer consisting of a first material and an outmost layer consisting of a second material, which is coated on a surface of the intermediate layer. The first material may be at least one selected from the group consisting of the elements that form alloys with lithium, and the second material may be at least one selected from the group consisting of transition metal oxides, transition metal nitrides and transition metal sulfides.

Abstract: The present invention relates to a particulate lithium transition metal phosphate with a homogeneous carbon coating deposited from the gas phase with as well as a process for its manufacture. The invention further relates the use of a carbon coated lithium transition metal phosphate as active material in an electrode, especially in a cathode.

Abstract: A secondary cell is provided that enables cost reduction and stable operation with a simple configuration and greatly exceeds the capacity of a lithium-ion cell. In a secondary cell, a conductive first electrode is formed on a substrate. An n-type metal oxide semiconductor layer, a charging layer for charging energy, a p-type metal oxide semiconductor layer, and a second electrode are laminated. The charging layer is filled with an n-type metal oxide semiconductor of fine particles. By a photoexcited structural change phenomenon caused by ultraviolet irradiation, a new energy level is formed in a band gap of the n-type metal oxide semiconductor. An electron is captured at the newly formed energy level, thereby charging energy. The charging layer is charged by connecting a power source between the first electrode and the second electrode. It is also possible to charge energy by light, using a transparent electrode.

Abstract: Compositions and methods of making are provided for mesoporous metal oxide microspheres electrodes. The mesoporous metal oxide microsphere compositions comprise (a) microspheres with an average diameter between 200 nanometers (nm) and 10 micrometers (?m); (b) mesopores on the surface and interior of the microspheres, wherein the mesopores have an average diameter between 1 nm and 50 nm and the microspheres have a surface area between 50 m2/g and 500 m2/g. The methods of making comprise forming composite powders. The methods may also comprise refluxing the composite powders in a basic solution to form an etched powder, washing the etched powder with an acid to form a hydrated metal oxide, and heat-treating the hydrated metal oxide to form mesoporous metal oxide microspheres.

Abstract: Electrodeposition and energy storage devices utilizing an electrolyte having a surface-smoothing additive can result in self-healing, instead of self-amplification, of initial protuberant tips that give rise to roughness and/or dendrite formation on the substrate and anode surface. For electrodeposition of a first metal (M1) on a substrate or anode from one or more cations of M1 in an electrolyte solution, the electrolyte solution is characterized by a surface-smoothing additive containing cations of a second metal (M2), wherein cations of M2 have an effective electrochemical reduction potential in the solution lower than that of the cations of M1.

Abstract: A positive active material for a rechargeable lithium battery includes a core including a lithium composite metal oxide selected from the group consisting of compounds represented by the following Chemical Formula 1, Chemical Formula 2, and combinations thereof; and a shell on the core, the shell including lithium iron phosphate (LiFePO4), and the lithium iron phosphate being present in an amount in a range of about 5 to about 15 wt % based on the total weight of the positive active material. LixMO2 ??[Chemical Formula 1] (wherein, in the above Chemical Formula 1, M is one or more transition elements, and 1?x?1.1) yLi2MnO3·(1?y)LiM?O2 ??[Chemical Formula 2] (wherein, in the above Chemical Formula 2, M? is one or more transition elements, and 0?x?1).

Abstract: A positive electrode for a lithium-ion secondary battery includes a positive-electrode mixture layer, which includes a positive-electrode active material containing lithium composite oxide, a conductive material, and a binder, and a current collector. The positive-electrode mixture layer contains a compound including sulfur and/or phosphorous, a first polymer serving as a main binder, and a second polymer different from the first polymer.

Abstract: An anode protector of a lithium-ion battery and a method for fabricating the same are provided. A passivation protector (110) is formed on a surface of an anode (102) in advance by film deposition, such as atomic layer deposition (ALD). The passivation protector (110) is composed of a metal oxide having three dimensional structures, such as columnar structures. Accordingly, the present invention is provided with effective protection of the anode electrode structure and maintenance of battery cycle life under high-temperature operation.

Abstract: A method of synthesizing defect-free phospho-olivine materials is disclosed. The method is based on direct hydrothermal synthesis of phospho-olivine compound(s) and subsequent lattice reordering at or near the transition temperature to eliminate lattice defects or on one-pot in situ hydrothermal synthesis of phospho-olivine compound(s), where the cation ordering occurs during dwell time after rapid synthesis to eliminate lattice defects. The disclosed methods produce defect-free phospho-olivine compound(s) having a crystal lattice with a Pnma space group. In order to determine the exact transition temperature for complete removal of single- or mixed-transition metals from lithium sites or to monitor the crystal growth and removal of single- or mixed-transition metals from lithium sites during the hydrothermal synthesis, the method encompasses a procedure for determining and monitoring defects in the phospho-olivine phases using X-ray diffraction.

Abstract: The present invention relates to nano structures of metal oxides having a nanostructured shell (or wall), and an internal space or void. Nanostructures may be nanoparticles, nanorod/belts/arrays, nanotubes, nanodisks, nanoboxes, hollow nanospheres, and mesoporous structures, among other nanostructures. The nanostructures are composed of polycrystalline metal, oxides such as SnO2. The nanostructures may have concentric walls which surround the internal space of cavity. There may be two or more concentric shells or walls. The internal space may contain a core such ferric oxides or other materials which have functional properties. The invention also provides for a novel, inexpensive, high-yield method for mass production of hollow metal oxide nanostructures. The method may be template free or contain a template such as silica. The nanostructures prepared by the methods of the invention provide for improved cycling performance when tested using rechargeable lithium-ion batteries.