Abstract: The present disclosure provides a light emitting device. The light emitting device includes a substrate, and an array of light emitting units over the substrate. Each of the light emitting units includes a first electrode. The first electrode includes a bottom surface on the substrate, a top surface opposite to the bottom surface, and a sidewall between the bottom surface and the top surface. Each of the light emitting units further includes a second electrode over the first electrode and facing the top surface. Each of the light emitting units further includes an organic layer between the first electrode and the second electrode. The organic layer at least partially covers the top surface and a meeting point of the top surface and the sidewall. The organic layer is discontinuous among the light emitting units. A method for manufacturing a light emitting device is also provided.

Abstract: The present disclosure provides a light emitting device. The light emitting device includes a substrate, and an array of light emitting units over the substrate. Each of the light emitting units includes a first electrode and an organic layer over the first electrode. The first electrode includes a bottom surface on the substrate, a top surface opposite to the bottom surface, and a sidewall between the bottom surface and the top surface. The organic layer at least partially covers the top surface and a meeting point of the top surface and the sidewall. The light emitting device also includes an array of bumps over the substrate, and a second electrode over the organic layer and the array of bumps. The array of light emitting units and the array of bumps are alternatively ordered. A method for manufacturing a light emitting device is also provided.

Abstract: A display device includes: a first substrate including a first region, a third region spaced apart from and surrounding the first region, and a second region located between the first region and the third region; a second substrate opposite to the first substrate; a display element including a first electrode on the first substrate, a light emitting layer provided on the first electrode, and a second electrode provided on the light emitting layer; a touch sensing part disposed on the second substrate; and a sealing member provided on the third region of the first substrate, the sealing member joining the first substrate and the second substrate, wherein the second electrode overlaps with the touch sensing part when viewed on a plane, and an end of the second electrode is spaced apart from an end of the touch sensing part at a certain distance in the direction of the sealing member in the second region.

Abstract: A display device includes a first display substrate including a display area and a non-display area, a second display substrate facing the first display substrate and including an end portion corresponding to the non-display area and extending along a first direction; a connection circuit board connected to the first display substrate at the non-display area thereof and disposed adjacent to the end portion of the second display substrate; and a first spacer and a second spacer each on the end portion of the second display substrate, and spaced apart from each other along the first direction to define a space therebetween. Along a second direction which crosses the first direction, a central portion of the connection circuit board connected to the first display substrate faces the space between the first spacer and the second spacer on the second display substrate.

Abstract: A display apparatus comprises a light-emitting device on a device substrate; an encapsulating layer on the device substrate and covering the light-emitting device; an encapsulation substrate on the encapsulating layer and including a plurality of penetrating holes disposed at a regular interval; and a moisture-blocking layer between the encapsulating layer and the encapsulation substrate and including a plurality of moisture-absorbing particles dispersed in the encapsulating layer, wherein the moisture-blocking layer has a water vapor transmission rate lower than that of the encapsulating layer.

Abstract: Disclosed are a pixel defining layer and a manufacturing method thereof, and a display panel, in the field of display technologies. An auxiliary electrode pattern is on a side of a substrate and configured to be electrically connected to a cathode in a display panel; and a first sub-defining layer is on a side of the auxiliary electrode pattern away from the substrate. A pixel defining layer has a plurality of openings, and the plurality of openings all pass through the auxiliary electrode pattern and the first sub-defining layer. The opening is configured to accommodate a material of a light emitting layer. An orthographic projection of the auxiliary electrode pattern on the substrate is within an orthographic projection of the first sub-defining layer on the substrate.

Abstract: The disclosure discloses a display panel and a display device, and the display panel includes: a base substrate, a drive wire layer on the base substrate, a planarization layer on a side of the drive wire layer facing away from the base substrate, a plurality of anodes in a form of an array on a side of the planarization layer facing away from the drive wire layer, a light-emitting layer on sides of respective anodes and the planarization layer facing away from the drive wire layer, and a transparent cathode layer on a side of the light-emitting layer facing away from the respective anodes, where the planarization layer includes grooves between the respective anodes, and auxiliary cathodes on a surface of the transparent cathode layer on a side thereof facing away from the light-emitting layer are arranged in the grooves.

Abstract: The present disclosure relates to the field of display technologies, and provides an OLED light emitting module, a manufacturing method thereof, and a display device. The OLED light emitting module includes a base substrate, an OLED light emitting device on the base substrate, and a metal stack on the OLED light emitting device. The metal stack includes a first metal layer, a second metal layer and a third metal layer arranged in stack. The second metal layer includes an invar alloy. The first metal layer and the third metal layer include a metal material different from the invar alloy.

Abstract: A method of fabricating an organic light emitting device (OLED) on a substrate includes providing a mold having surface features, forming a substrate over the mold, fabricating an OLED over the substrate while the substrate is in the mold, and removing the mold from the substrate having the OLED fabricated thereon.

Abstract: Disclosed belongs to the technical field of displaying, and particularly relates to a sealant tape, a display panel and methods for manufacturing the same. The sealant tape comprises a substrate and an adhesive layer provided on at least one side of the substrate, wherein the substrate comprises a first elastomer, and the adhesive layer comprises a second elastomer and a crosslinking agent. Both of the substrate and the adhesive layer of the sealant tape are formed of elastomeric materials, and the adhesive layer further comprises a crosslinking agent to adjust the storage modulus thereof, such that the sealant tape can withstand a higher stress while provides excellent bending performance, and has a higher viscosity to ensure that it will not be unglued when the display panel is folded and thus it can be prevented from being damaged during folding or bending of the flexible display panel, ensuring good packaging performance.

Abstract: A bottom protection film for an OLED panel is provided. More particularly, a bottom protection film for an OLED panel, which has excellent alignment process workability and excellent adhesion to an OLED panel, and is capable of preventing static electricity through an antistatic treatment and preventing an electrical short circuit at the same time, and an organic light-emitting display device including the bottom protection film are provided.

Abstract: A lower part protection film for an OLED panel is provided. More particularly, a lower part protection film for an OLED panel, having a significantly improved recognition rate of an alignment process, being capable of preventing generation of static electricity through an antistatic treatment, and having excellent adhesion to an OLED panel at the same time, and an organic light-emitting display apparatus including the lower part protection film for an OLED panel are provided.

Abstract: A first product may be provided that comprises a substrate having a first surface, a first side, and a first edge where the first surface meets the first side; and a device disposed over the substrate, the device having a second side, where at least a first portion of the second side is disposed within 3 mm from the first edge of the substrate. The first product may further comprise a first barrier film that covers at least a portion of the first edge of the substrate, at least a portion of the first side of the substrate, and at least the first portion of the second side of the device.

Abstract: An OLED (organic light emitting diode) display panel is provided. The OLED display includes a substrate having a display region and a non-display region disposed around the display region, and the non-display region is provided with a partition wall. A first inorganic layer is disposed on the display region and the partition wall. A hydrophobic layer is disposed on the first inorganic layer and located corresponding to the partition wall. An organic layer is disposed on the first inorganic layer and a portion of the hydrophobic layer, wherein the organic layer is disposed on an inner side of the partition wall adjacent to the display region. A second inorganic layer is disposed on the organic layer.

Abstract: A light emitting display apparatus can include a light emitting element disposed on a substrate; an encapsulation unit disposed on the light emitting element; and a scattering film disposed between the encapsulation unit and the light emitting element, or inside the encapsulation unit, the scattering film being configured to scatter light emitted from the light emitting element.

Abstract: A light emitting device and a display apparatus including a phase shifting mirror are provided. The light emitting device includes a first electrode, a light emitting structure, a second electrode, and a phase shifting mirror. The phase shifting mirror has a number of patterns arranged in a periodic manner with an interval between adjacent patterns. Each pattern has a top surface and a side surface between the top surface of the respective pattern and the top surface of the first electrode.

Abstract: A mask assembly and an apparatus and method for manufacturing a display apparatus are provided. A mask assembly includes a mask frame and a mask on the mask frame and having at least one opening. The mask includes a mask body portion having the at least one opening, and a protruding portion arranged to surround the at least one opening and including an inner surface defining the at least one opening, the protruding portion protruding from the mask body portion and configured to protrude toward a display substrate and contact the display substrate. A deposition material is configured to pass through the at least one opening to be deposited in an entire display area of a display panel including a plurality of pixels.

Abstract: A manufacturing method of an organic electronic device of the present invention, includes: a removing step of removing a volatile component from a flexible base material; a fixing step of fixing the flexible base material onto a support substrate via an adhesive layer; and a forming step of forming a device main body sequentially including a first electrode layer, at least one organic functional layer, and a second electrode layer on the flexible base material that is fixed onto the support substrate, on a side opposite to the support substrate, in this order, in which a vapor pressure of the volatile component is greater than or equal to 101325 Pa within a temperature range from 20° C. to a melting point of a parent resin of the flexible base material.

Abstract: A battery cover assembly includes a cover plate, an electrode inner terminal and an electrode outer terminal. The electrode inner terminal is electrically connected to the electrode outer terminal through a current interrupt structure disposed on the cover plate. The current interrupt structure includes a sealed chamber configured to fill a gas-producing medium therein. The sealed chamber is configured to make the gas-producing medium to be electrically connected to positive electrodes and negative electrodes of a battery. When a voltage difference between the positive electrodes and negative electrodes of the battery exceeds a rated value, the gas-producing medium is capable of producing gas, to disrupt the electrical connection between the electrode inner terminal and the electrode outer terminal under the action of the pressure of the gas.

Abstract: Provided is a vehicle battery device in which components are reduced, a compact configuration can be achieved, and connection with the outside can be easily performed. A vehicle battery device includes: a battery cell mounting part accommodating a battery cell group constituted by a plurality of laminated battery cells; and an interface box integrating connection functions between the battery cell mounting part and the outside, wherein the battery cell mounting part is connected to at least one of two opposing side surfaces in an outer surface of the interface box, and has an end plate on an end surface opposite an end surface connected to the interface box; and the battery cell group of the battery cell mounting part is compressed and sandwiched between the side surface of the interface box and the end plate in a lamination direction of the battery cells.

Abstract: A battery adapter assembly for engine-powered outdoor power equipment including a battery pack, an adapter, a receiver, and a starting motor. The battery pack includes multiple battery cells, a positive terminal, and a negative terminal and is removable and replaceable. The adapter is structured to selectively connect to the battery pack and electrically connect to the positive terminal and the negative terminal of the battery pack. The receiver is structured to selectively receive and electrically connect to the adapter to transfer power from the battery pack to the receiver. The starting motor is structured to start an internal combustion engine and selectively receives power supplied by the battery pack. The adapter is structured to connect to and transfer power from multiple battery packs having different voltages.

Abstract: A low-floor electric bus includes a plurality of battery packs mounted under the floor of such that the floor inside the bus between a front axle and a rear axle of the bus is substantially flat. Each battery pack may include an enclosure and multiple battery modules positioned within the enclosure. And, each battery module may include a plurality of battery cells electrically connected together.

Abstract: The battery module includes a plurality of batteries that are stacked and a heat transfer suppression member disposed between adjacent two batteries.

Abstract: An energy storage apparatus includes one or more energy storage devices and an outer housing that houses the one or more energy storage devices. The outer housing includes an opening that allows communication between an interior and an exterior of the outer housing. The opening is sealed by a first pressure adjuster and a second pressure adjuster arranged complementary to each other. The first pressure adjuster allows passage of gas and prohibits passage of liquid. The second pressure adjuster prohibits passage of the gas and the liquid, and releases an internal pressure in the interior of the outer housing when the internal pressure exceeds a predetermined pressure.

Abstract: This nonaqueous electrolyte secondary battery is provided with an electrode body that is obtained by alternately laminating a plurality of positive electrodes and a plurality of negative electrodes, with separators being interposed therebetween. Each separator is configured of a porous resin substrate and a porous heat-resistant layer that is formed on one surface of the resin substrate and has a larger surface roughness than the resin substrate. The electrode body comprises: bonding particles that bond a negative electrode and a heat-resistant layer with each other; and bonding particles that bond a positive electrode and a resin substrate with each other. The mass of the bonding particles per unit area in a first interface between the negative electrode and the heat-resistant layer is larger than the mass of the bonding particles per unit area in a second interface between the positive electrode and the resin substrate.

Abstract: The invention concerns a biaxially orientated, single- or multi-layered porous film which comprises at least one porous layer and this layer contains at least one propylene polymer and polyethylene; (i) the porosity of the porous film is 30% to 80%; and (ii) the permeability of the porous film is <1000 s (Gurley number); characterized in that (iii) the porous film comprises an inorganic, preferably ceramic coating; and (iv) the coated porous film has a Gurley number of <1500 s; and (v) the coated porous film has a Gurley number of >6000 s when it is heated for 5 minutes to over 140° C. The coated, porous film has dual safety features. Furthermore, the invention also concerns a process for the production of a film of this type as well as its use in high energy or high performance systems, in particular in lithium, lithium ion, lithium-polymer and alkaline-earth batteries.

Abstract: The invention concerns a biaxially orientated, single- or multi-layered porous film which comprises at least one porous layer and this layer contains at least one propylene polymer; (i) the porosity of the porous film is 30% to 80%; and (ii) the permeability of the porous film is <1000 s (Gurley number); characterized in that (iii) the porous film comprises an inorganic, preferably ceramic coating; and (iv) the coated porous film has a Gurley number of <1500 s. Furthermore, the invention also concerns a process for the production of a film of this type as well as its use in high energy or high performance systems, in particular in lithium, lithium ion, lithium-polymer and alkaline-earth batteries.

Abstract: An automotive bus bar module includes a flat plate-shaped bus bar arranged to extend over electrodes of two adjacent unit batteries of a plurality of linearly arranged unit batteries of a battery assembly to electrically connect the electrodes to each other, a plurality of electric wires arranged to extend along an arrangement direction of the unit batteries, one of the plurality of electric wires being connected to the bus bar and an electric wire holding plate made of resin and arranged to extend over an upper surface of the bus bar, the electric wire holding plate holding the plurality of electric wires in a state of being parallel to each other and arranged planarly such that the plurality of electric wires extend along the arrangement direction of the unit batteries.

Abstract: A battery module according to the present disclosure includes a cell assembly including a plurality of battery cells stacked in a vertical direction, each battery cell having an electrode lead in a shape of a plate that protrudes forward in a depth direction perpendicular to the vertical direction, the electrode lead being bent for surface contact in the vertical direction with an adjacent electrode lead, the electrode lead having a protruding part that protrudes forward in the depth direction from a front side end thereof, and a sensing terminal module having a plurality of sensing terminals made of an electrically conductive material and a plurality terminal seating holes in which corresponding ones of the sensing terminals are seated and supported, the protruding part of each electrode lead being press-fit into a corresponding one of the sensing terminals which compresses around the protruding part.

Abstract: An exemplary embodiment of the present invention provides a rechargeable battery that can block a current of a cell without causing quality scatter by removing operating scatter of the overcharge safety device upon occurrence of overcharge in the cell.

Abstract: A cooling lance is provided to cool an electrically conductive contact body. The cooling lance includes a lance body, a fluid line extending through the lance body, and a flexible cooling bladder positioned on an end of the lance body and in fluidic communication with the fluid line.

Abstract: The present invention discloses a micro-capsule type silicon-carbon composite negative electrode material, and the negative electrode material comprises a current collector and a silicon-carbon coating layer formed by drying silicon-carbon paste coating the current collector; the silicon-carbon slurry comprises a carbonaceous paste and silicon capsule powder dispersed in the carbonaceous paste; the carbonaceous paste comprises a dispersing agent, and a carbon material, a first conductive agent and a first binder dispersed in the dispersing agent; the silicon capsule powder has micro-capsule structures comprising silicon powder and a second binder coating the surface of the silicon powder and in which the silicon powder is a core and the second binder is an outer shell; and the first binder is different from the second binder. The improved silicon-carbon composite negative electrode material of the present disclosure has excellent effects in cycle performance, coulombic efficiency and rate capability.

Abstract: Provided herein are electrochemical cells (e.g., sodium batteries), as well as methods of making and using thereof. The electrochemical cells can employ an “anode-free” design that includes a nucleation layer (e.g., a carbon nucleation layer) disposed on a current collector (e.g., an aluminum current collector). Electrochemical studies show that the modified current collectors can provide highly stable and efficient plating and stripping of sodium metal over a range of currents and sodium loadings with long-term durability. Further, full cells constructed using these modified current collectors can achieve energy densities of greater than 400 Wh/kg, far surpassing recent reports for sodium-ion batteries and even the theoretical maximum for lithium ion battery technology while still relying on naturally abundant raw materials and cost-effective aqueous processing.

Abstract: To provide a negative electrode for a lithium ion battery having high energy density and excellent rapid charging characteristics. A negative electrode for a lithium ion battery, the negative electrode including a negative electrode current collector, a negative electrode active material layer formed on the surface of the negative electrode current collector, and a non-aqueous liquid electrolyte including an electrolyte containing lithium ions and a non-aqueous solvent, in which the negative electrode active material layer includes a negative electrode active material and voids, the voids are filled with the non-aqueous liquid electrolyte, and a proportion of the battery capacity based on a total amount of lithium ions in the non-aqueous liquid electrolyte existing in the negative electrode active material layer with respect to the battery capacity based on a total amount of the negative electrode active material is 3% to 17%.

Abstract: Disclosed in the present application is a compound, comprising nano silicon, a lithium-containing compound and a carbon coating, or comprising nano silicon, silicon oxide, a lithium-containing compound, and a carbon coating. The method comprises: (1) solid-phase mixing of carbon coated silicon oxide with a lithium source; and (2) preforming heat-treatment of the pre-lithium precursor obtained in step (1) in a vacuum or non-oxidising atmosphere to obtain a compound. The method is simple, and has low equipment requirements and low costs; the obtained compound has a stable structure and the structure and properties do not deteriorate during long-term storage, a battery made of cathode material containing said compound exhibits high delithiation capacity, high initial coulombic efficiency, and good recycling properties, the charging capacity is over 1920 mAh/g, the discharging capacity is over 1768 mAh/g, and the initial capacity is over 90.2%.

Abstract: A composite cathode active material, a cathode including the composite cathode active material, and a lithium battery including the cathode are provided. The composite cathode active material includes a core including a lithium metal oxide and a coating layer on the core, wherein the lithium metal oxide includes two or more transition metals including nickel (Ni), an amount of Ni within one mole of the two or more transition metals included in the lithium metal oxide is about 0.65 mol or greater, the coating layer includes LiF, and a resistance of the composite cathode active material is lower than that of the core.

Abstract: A battery includes a positive electrode, a negative electrode, and an electrolyte, and the positive electrode contains a melamine-based compound.

Abstract: The disclosure relates more specifically to protected anodes for batteries, and to methods for making such anodes. One aspect of the disclosure is a method for preparing a protected anode, the method including providing an electrochemical cell comprising a cathode comprising at least one transition metal dichalcogenide, an anode comprising a metal, an electrolyte in contact with the transition metal dichalcogenide of the cathode and the metal of the anode, and carbon dioxide dissolved in the electrolyte; and performing a discharge-charge cycle comprising discharging the electrochemical cell, and applying a voltage across the anode and the cathode for a time sufficient to charge the electrochemical cell; wherein the electrochemical cell is substantially free of water; and wherein one or more chemical species formed in the discharge-charge cycle and dissolved in the electrolyte are deposited onto the anode.

Abstract: Provided is a method for manufacturing a flexible electrode, including the steps of: (i) coating a porous current collector having a plurality of pores with an active material slurry having a solid content of 30-50% and drying the active material slurry to form an active material coating layer; (ii) coating an active material slurry having a solid content of 30-50% on the active material coating layer formed from the preceding step and drying the active material slurry to form an additional active material coating layer; and (iii) repeating step (ii) n times (1?n?5) to form multiple active material coating layers, thereby forming an electrode active material layer in the pores and on the surface of the porous current collector in a non-press mode. A flexible electrode obtained from the method and a lithium secondary battery including the flexible electrode are also provided.

Abstract: A method of pre-lithiating an electrode for a secondary battery, the method including: a first step of bringing a lithium metal into direct contact with an electrode in an electrolyte and applying pressure to the electrode to prepare a pre-lithiated electrode; and a second step of removing the lithium metal and then applying pressure to the pre-lithiated electrode to perform a stabilization process. The electrode for the secondary battery after going through the pre-lithiation can relieve volume change of the electrode and reduce contact loss of the electrode.

Abstract: One of the objects of the present invention is to suppress mixing of a first layer and a second layer while forming the second layer before drying the first layer when manufacturing the electrode for the secondary battery in which the first layer and the second layer are laminated on the current collector. A method for manufacturing an electrode used as a positive electrode and a negative electrode of a secondary battery according to the present invention comprises applying a first layer slurry to a surface of a current collector, applying a second layer slurry on the first layer slurry before the first layer slurry is dried, and drying the first layer slurry and the second layer slurry after applying the first layer slurry and the second layer slurry to obtain a laminated structure in which a first layer and a second layer are laminated in this order on the current collector.

Abstract: A 3-dimensional (3D) pattern puncher for punching a lithium metal electrode to provide one or more unit electrodes is provided. The 3D pattern puncher includes a mold punch configured to move up and down, the mold punch corresponding to a size of the unit electrode; a die corresponding to the mold punch; a mold blade disposed at an edge of the mold punch and configured to punch the lithium metal electrode to provide the one or more unit electrodes; and a 3D pattern positioned at an inner portion of the mold punch where the mold blade is not disposed.

Abstract: A graphite-based material for a lithium ion secondary battery, the graphite-based material comprising a coating film on at least a part of the surface of a graphite particle, the coating film comprising a lithium fluorophosphate compound having a specific composition.

Abstract: A cathode active material includes a plurality of cathode active compound particles and a coating disposed over each of the cathode active compound particles. The coating includes a lithium (Li)-ion conducting oxide containing lanthanum (La) and titanium (Ti).

Abstract: Provided positive electrode active substance particles for non-aqueous electrolyte secondary batteries which is excellent in life characteristics of a battery with respect to a repeated charging and discharging performance thereof, as well as a non-aqueous electrolyte secondary battery. A positive electrode active substance for non-aqueous electrolyte secondary batteries comprising lithium transition metal layered oxide having a composition represented by the formula: Lia(NixCoyMn1-x-y)O2 wherein a is 1.0•a•1.15; x is 0<x<1; and y is 0<y<1, in which the positive electrode active substance is in the form of secondary particles formed by aggregating primary particles thereof, and a coefficient of variation of a compositional ratio: Li/Me wherein Me is a sum of Ni, Co and Mn (Me=Ni+Co+Mn) as measured on a section of the secondary particle is not more than 25%.

Abstract: A nickel-hydrogen battery includes a plurality of electrodes each including a current collector made of a metal, and disposed in a manner stacked in a first direction; a separator disposed between adjacent electrodes of the plurality of electrodes; a plurality of resin members disposed on peripheral portions of the plurality of electrodes to ensure a clearance between the adjacent electrodes; and a surface treatment layer covering one surface of the current collector at least in the peripheral portion of the plurality of electrode. The surface treatment layer includes a plurality of protrusions from the one surface. Widest parts of the protrusions are located above base ends thereof, and a parts of the resin members are interposed between adjacent protrusions, across a range from the tip ends to the base ends thereof.

Abstract: A positive electrode composite material for a lithium ion secondary battery that makes it possible to appropriately reduce the electric resistance in a positive electrode and to realize a high-performance lithium ion secondary battery. The positive electrode composite material to be used in the positive electrode of the lithium ion secondary battery includes a particulate positive electrode active material composed of a lithium composite oxide having a layered crystal structure including at least lithium, and a conductive oxide. Here, a particulate region where primary particles of the conductive oxide are aggregated, and a film-shaped region where the conductive oxide is formed in a film shape adhere to at least a part of the surface of the positive electrode active material. The average particle diameter based on cross-sectional TEM observation of primary particles in the particulate region is equal to or greater than 0.

Abstract: Provided is a nickel-based active material precursor for a lithium secondary battery, including: a secondary particle including a plurality of particulate structures, wherein each of the particulate structures includes a porous core portion and a shell portion including primary particles radially arranged on the porous core portion, and in 50% or more of the primary particles constituting a surface of the secondary particle, a major axis of each of the primary particles is aligned along a normal direction of the surface of the secondary particle. When the nickel-based active material precursor for a lithium secondary battery is used, it is possible to obtain a nickel-based active material which intercalates and deintercalates lithium and has a short diffusion distance of lithium ions.

Abstract: Provided is a method for producing a positive electrode active material for nonaqueous electrolyte secondary batteries, including: a water-washing step of mixing, with water, Li—Ni composite oxide particles represented by the formula: LizNi1?x?yCoxMyO2 and composed of primary particles and secondary particles formed by aggregation of the primary particles to water-wash it, and performing solid-liquid separation to obtain a washed cake; a mixing step of mixing a W compound powder free from Li with the washed cake to obtain a W-containing mixture; and a heat treatment step of heating the W-containing mixture, the heat treatment step including: a first heat treatment step of heating the W-containing mixture to disperse W on the surface of the primary particles; and subsequently, a second heat treatment step of heating it at a higher temperature than in the first heat treatment step to form a lithium tungstate compound on the surface of the primary particles.

Abstract: A battery includes a positive electrode, a negative electrode, and an electrolyte, wherein the positive electrode includes a plurality of positive electrode active substance grains, and an average number of grain boundaries per one of the positive electrode active substance grains is less than 0.58.