Abstract: A method for preparing a lithium cobalt-based positive electrode active material and a positive electrode active material prepared by the method are provided. The method includes dry-mixing and then heat treating a lithium cobalt oxide particle represented by Formula 1 and one or more lithium metal oxide particle selected from the group consisting of lithium aluminum oxide, lithium zirconium oxide, and lithium titanium oxide.

Abstract: Provided is a composite particulate for use in a lithium battery cathode, the composite particulate comprising one or a plurality of particles of a cathode active material encapsulated by or embedded in an electrically and/or ionically conducting polymer gel network, wherein the cathode active material is selected from the group of lithium nickel cobalt metal oxides having a general formula LixNiyCozMwO2, where M is selected from the group consisting of aluminum (Al), titanium (Ti), tungsten (W), chromium (Cr), molybdenum (Mo), magnesium (Mg), beryllium (Be), calcium (Ca), tantalum (Ta), silicon (Si), and combinations thereof and x ranges from 0 to 1.2, the sum of y+z+w ranges from 0.8 to 1.2, w ranges from 0 to 0.5, y and z are both greater than zero, and the ratio z/y ranges from 0 to 0.5.

Abstract: Provided is a conductive material dispersion liquid for an electrochemical device capable of forming an electrode that has excellent flexibility and smoothness and can cause an electrochemical device to display excellent cycle characteristics. The conductive material dispersion liquid contains a conductive material, a dispersant including CNTs, and a dispersion medium. The conductive material dispersion liquid has a Casson viscosity of 30 (Pa·s)1/2 or less, Casson yield value of 20 Pa1/2 or less, and hysteresis constant calculated by formula (I) (hysteresis constant C=(N1?N2)/N1) of 0.7 or less. N1 is viscosity (Pa·s) of the conductive material dispersion liquid at a shear rate of 10 s?1 when viscosity (25° C.) is measured while increasing shear rate from 10?2 s?1 to 103 s?1, and N2 is viscosity (Pa·s) thereof at a shear rate of 10 s?1 when viscosity (25° C.) is measured while decreasing shear rate from 103 s?1 to 10?2 s?1.

Abstract: Apparatus, systems, and methods described herein relate to the manufacture and use of single pouch battery cells. In some embodiments, an electrochemical cell includes a first current collector coupled to a first portion of a pouch, the first current collector having a first electrode material disposed thereon, a second current collector coupled to a second portion of the pouch, the second current collector having a second electrode material disposed thereon, and a separator disposed between the first electrode material and the second electrode material. The first portion of the pouch is coupled to the second portion of the pouch to enclose the electrochemical cell.

Abstract: The present application discloses a wound electrode assembly, wherein the negative electrode plate thereof includes a negative electrode current collector and a negative active material layer which includes a negative active material disposed on two opposite surfaces of the negative electrode current collector; and the two negative active material layers respectively include active an material layer in an unpaired region and an active material layer in a paired region distributed successively in the length direction of the negative electrode plate, and two active material layers in the unpaired regions are arranged at both ends in the length direction of the negative electrode plate, and a first metallic lithium layer is disposed on the surface of one or both of the active material layers in the unpaired regions, so that to form a first lithium pre-intercalation compound in either or both of the active material layers in the unpaired regions.

Abstract: To provide an all-solid-state battery capable of extracting capacitance at lower pressure, despite a binder-less configuration free from an organic polymer compound binder and a method for manufacturing the same. An all-solid-state battery 10 includes a positive electrode layer 11 containing positive electrode active material particles and first solid electrolyte particles, a solid electrolyte layer 13 containing the first solid electrolyte particles, and a negative electrode layer 12 containing negative electrode active material particles and the first solid electrolyte particles, the positive electrode layer 11, the solid electrolyte layer 13, and the negative electrode layer 12 being bonded to one another, in which at least one layer of the positive electrode layer 11, the solid electrolyte layer 13, and the negative electrode layer 12 further contains a second solid electrolyte and the second solid electrolyte has crystallinity and is packed and arranged to fill gaps between the particles.

Abstract: An electrode binder of a lithium ion battery comprising: (a) a polyvinylidene binder dispersed in an organic diluent with (b) a (meth)acrylic polymer dispersant. The binder can be used in the assembly of electrodes of lithium ion batteries.

Abstract: The present invention relates to a positive electrode active material and a lithium secondary battery including the same, and more particularly, to a positive electrode active material which exhibits a predetermined peak intensity ratio and a predetermined voltage ratio in a graph illustrating the voltage (V) and the battery capacity (Q) at the 3rd cycle and having an X axis indicating the voltage (V) and a Y axis indicating a value (dQ/dV) obtained by differentiating the battery capacity (Q) with respect to the voltage (V) when charging/discharging is performed under predetermined conditions, and a lithium secondary battery including the same.

Abstract: A positive electrode (1) for non-aqueous electrolyte secondary batteries, including collector (11) and active material layer (12), wherein: integrated value (a) is 3 to 15% (for frequency of diameters of 1 ?m or less), and frequency (b) is 8 to 20% (for diameter with a maximum frequency). A positive electrode (1) for non-aqueous electrolyte secondary batteries, including collector (11) and active material layer (12), wherein assuming two directions perpendicular to thickness direction of collector (11) and mutually orthogonal as first and second directions, average thickness a1, maximum thickness b1, minimum thickness cl in thickness distribution in the first direction, and thickness d1 (largest absolute value of difference from a1) satisfy 0.990?(d1/a1)?1.010 and (b1?c1)?5.0 ?m, and average thickness a2, maximum thickness b2, minimum thickness c2 in thickness distribution in the second direction, and thickness d2 (largest absolute value of difference from a2) satisfy 0.990?(d2/a2)?1.010 and (b2?c2)?5.0 ?m.

Abstract: A secondary battery and a preparation method thereof, and a battery module, battery pack, and apparatus containing a secondary battery are provided. In some embodiments, the secondary battery includes a positive electrode plate, a negative electrode plate, and an electrolyte, where the positive electrode plate includes a positive electrode current collector and a positive electrode film layer that is disposed on at least one surface of the positive electrode current collector and that includes a positive electrode active material, and the negative electrode plate includes a negative electrode current collector and a negative electrode film layer that is disposed on at least one surface of the negative electrode current collector and that includes a negative electrode active material; and the positive electrode active material includes a first material and a second material.

Abstract: This separator for a power storage device has a porous layer containing a polyolefin resin and surface-treated ionic compound. The ionic compound content of the porous layer is 5 to 99 mass %, and the degree of surface hydrophilicity of the ionic compound is 0.10 to 0.80.

Abstract: A main object of the present disclosure is to provide an all solid state battery with excellent capacity durability when restraining pressure is not applied or even when low restraining pressure is applied thereto. The present disclosure achieves the object by providing an all solid state battery comprising layers in the order of a cathode layer, a solid electrolyte layer, and an anode layer; wherein the anode layer contains an anode active material including a silicon clathrate II type crystal phase; restraining pressure of 0 MPa or more and less than 5 MPa is applied to the all solid state battery in a layering direction; and a specific surface area of the anode active material is 8 m2/g or more and 17 m2/g or less.

Abstract: An additive, a non-aqueous electrolyte solution including the same, and a lithium secondary battery including the same are disclosed herein. In some embodiments, a non-aqueous electrolyte solution includes a lithium salt, a non-aqueous solvent including a propyl propionate, and a compound represented by Formula 1: wherein, in Formula 1, R1 and R2 are each independently hydrogen or a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms.

Abstract: Graphite and a preparation method thereof, a secondary battery containing the modified graphite, a battery module, a battery pack, and an electrical device are provided. In particular, the modified graphite according to this disclosure includes a graphite moiety and a binder moiety covalently linked to the graphite moiety. The binder moiety possesses a structure expressed as Formula (IV´). The modified graphite according to this disclosure solves the problem that the binder floats up during the preparation of the negative electrode plate of the secondary battery.

Abstract: The application provides a secondary battery and a device including the same. The second battery includes: a negative electrode plate, the negative electrode plate including a negative active material; a separation film, the separation film including a base material and a coating arranged on at least one surface of the base material; and an electrolyte, the electrolyte including an organic solvent, where the negative active material includes a silicon-based material and a carbon material; thickness of the base material of the separation film is 7 ?m˜12 ?m; and the organic solvent includes ethylene carbonate, and a weight ratio of the ethylene carbonate in the organic solvent is ?20%. The secondary battery and the device including the same, which are provided by the application, in the premise of having high energy density, can also have good high-temperature cycle performance, good high-temperature storage performance, and low low-temperature direct current resistance.

Abstract: This application provides a negative electrode plate, a lithium metal battery, and an apparatus including the lithium metal battery. The negative electrode plate includes a negative electrode current collector and a lithium-metal negative electrode disposed on at least one surface of the negative electrode current collector, where a polymer protective film is disposed on a surface of the lithium-metal negative electrode away from the negative electrode current collector, the polymer protective film includes a citric acid copolymer, and a number-average molecular weight Mn of the citric acid copolymer is 10,000 to 1,000,000. In this application, a polymer protective film with high tensile strength, high puncture strength, high elongation, and high electrolyte holding capacity may be formed on the surface of the lithium-metal negative electrode in the negative electrode plate.

Abstract: A battery unit may comprise a first cell type and a second cell type electrically connected at least in series, wherein the first cell type may include N first cells, the second cell type may include M second cells, and N and M are positive integers; the first cell may have a discharge cell balance rate of CB1, the second cell may have a discharge cell balance rate of CB2, with 0.5?CB1?CB2?1.4, and when the battery unit is charged to 95%-100% of the state of charge, the first cell may have a corresponding open-circuit voltage change rate of not greater than 0.005 V/% SOC, and the second cell type may have a corresponding open-circuit voltage change rate greater than that of the first cell.

Abstract: This positive electrode active material for nonaqueous electrolyte secondary batteries comprises composite oxide particles which contain Ni, Co and Li, while containing at least one of Mn and Al, and wherein the ratio of Ni to the total number of moles of the metal elements other than Li is 80% by mole or more. The composite oxide particles are composed of particles in an aggregated state and particles in a non-aggregated state; and the content ratio of the particles in an aggregated state to the particles in a non-aggregated state is from 5:95 to 50:50 in terms of the mass ratio.

Abstract: A non-aqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and a non-aqueous electrolytic solution including a predetermined cyano ester compound and a cyclic sulfuric acid ester.

Abstract: A positive electrode active material for a nonaqueous electrolyte secondary battery is disclosed which contains a lithium-nickel-manganese composite oxide containing a secondary particle formed of a plurality of flocculated primary particles and a lithium-niobium compound. The positive electrode active material is represented by General Formula (1): LidNi1?a?b?cMnaMbNbcO2+? (M is at least one element selected from Co, W, Mo, V, Mg, Ca, Al, Ti, Cr, Zr, and Ta; and 0.03?a?0.60, 0?b?0.60, 0.02?c?0.08, a+b+c<1, 0.95?d?1.20, and 0???0.5, the lithium-nickel-manganese composite oxide has a (003)-plane crystallite diameter of at least 50 nm and up to 130 nm, the lithium-niobium compound is present on surfaces of the primary particles, and part of niobium in the positive electrode active material is solid-solved in the primary particles.