Abstract: A negative active material includes a carbon material. The carbon material satisfies the following relationship: 6<Gr/K<16, Gr is a graphitization degree of the carbon material, measured by X-ray diffraction; and K is a ratio Id/Ig of a peak intensity Id of the carbon material at a wavenumber of 1250 cm?1 to 1650 cm?1 to a peak intensity Ig of the carbon material at a wavenumber of 1500 cm?1 to 1650 cm?1, and is measured by using Raman spectroscopy, and K is 0.06 to 0.15.

Abstract: A battery support beam and battery module including the battery support beam are provided. The battery support beam includes a first end, a second end opposite the first end, and a battery support section between the first end and the second end. The battery support section includes a plurality of cylindrical sleeves arranged in a predetermined pattern, each having a cylindrical sidewall having an open-ended top and an open-ended bottom. Each of the cylindrical sidewalls is configured to be arranged around a cylindrical middle section of one of a plurality of cylindrical battery cells. The battery module includes a plurality of cylindrical battery cells including a plurality of groups of battery cells arranged in the predetermined pattern. The battery module further includes a battery support section for each of the plurality of groups of battery cells.

Abstract: Provided are flexible multi-battery assemblies and methods of manufacturing these assemblies. In some examples, a flexible multi-battery assembly comprises a first current collector, parsed into a first plurality of current collector portions such that each portion contacts one of a plurality of electrochemically active stacks. The second current collector may be continuous (e.g., to provide support to the electrochemically active stacks) or similarly parsed into a second plurality of current collector portions. Each electrochemically active stack forms one of flexible electrochemical cells in the flexible multi-battery assembly. Furthermore, at least one outer surface of the first current collector or the second outer surface is fully exposed, e.g., to allow forming electrical and mechanical connections directly to one or both current collectors. In some examples, an insulator layer covers a non-exposed surface of the other current collector.

Abstract: A current collector layer for an all-solid-state battery is provided with which a good electron path can be easily formed and rate characteristic can be improved. A current collector layer 5 for an all-solid-state battery 1, the current collector layer 5 including: a carbon material; and a solid electrolyte, the all-solid-state battery 1 including a group 1 or 2 ion conductive solid electrolyte layer 2, the carbon material being mixed with Si at a weight ratio of 1:1 to produce a mixture, the mixture having an X-ray diffraction spectrum having a ratio of a peak height a to a peak height b, a/b, of 0.2 or more and 10.0 or less as being measured, the peak height a being highest in a range of 2? of 24° or more and less than 28°, and the peak height b being highest in a range of 2? of 28° or more and less than 30°.

Abstract: A hydride heat engine produces electricity from a heat source, such as a solar heater. A plurality of metal hydride reservoirs are heated by the heating device and a working fluid comprises hydrogen is incrementally move from one metal hydride reservoir to a success metal hydride reservoir. The working fluid is passed, at a high pressure, from the last of the plurality of metal hydride reservoirs to an electro-chemical-expander. The electro-chemical-expander has an anode, a cathode, and an ionomer therebetween. The hydrogen is passed from the anode at high pressure to the cathode at lower pressure and electricity is generated. The solar heater may be a solar water heater and the hot water may heat the metal hydride reservoirs to move the hydrogen. The working fluid may move in a closed loop.

Abstract: A process for making a partially coated electrode active material may involve: (a) providing an electrode active material of the formula Li1+xTM1?xO2, wherein TM is a combination of Ni, Co and, optionally, Mn, and, optionally, at least one metal selected from Al, Ti, Mo, W, and Zr, and x is in the range of from zero to 0.2, wherein at least 60 mole-% of the transition metal of TM is Ni, and wherein the electrode active material has a residual moisture content in the range of from 50 to 1,000 ppm; (b) treating the electrode active material with a metal alkoxide or metal halide or metal amide or alkyl metal compound; (c) treating the material obtained in (b) with moisture; and (d) repeating the sequence of (b) and (c) twice to 4 times, wherein, in the last sequence of (b) and (c), moisture is at least partially substituted by ozone.

Abstract: The disclosed technology relates to battery pack that includes a first prismatic cell having a first surface, and a second prismatic cell having a second surface, wherein the first prismatic cell and the second prismatic cell are electrically coupled and arranged such that the first surface and the second surface form an L-shaped pack surface. In some aspects, the battery pack includes an adhesive that is disposed on the pack surface away from a junction between the first surface and the second surface. A battery-powered electronic device and method of manufacture are also provided.

Abstract: A negative active material includes a carbon material. The carbon material satisfies the following relationship: 6<Gr/K<16, Gr is a graphitization degree of the carbon material, measured by means of X-ray diffraction; and K is a ratio Id/Ig of a peak intensity Id of the carbon material at a wavenumber of 1250 cm?1 to 1650 cm?1 to a peak intensity Ig of the carbon material at a wavenumber of 1500 cm?1 to 1650 cm?1, and is measured by using Raman spectroscopy, and K is 0.06 to 0.15. The negative active material according to this application can significantly improve an energy density, cycle performance, and rate performance of the electrochemical device.

Abstract: A negative electrode active material as well as a method of preparing a negative electrode active material which includes preparing a silicon-based compound including SiOx, wherein 0.5<x<1.3; disposing a polymer layer including a polymer compound on the silicon-based compound; disposing a metal catalyst layer on the polymer layer; heat treating the silicon-based compound on which the polymer layer and the metal catalyst layer are disposed; and removing the metal catalyst layer, wherein the polymer compound includes any one selected from the group consisting of glucose, fructose, galactose, maltose, lactose, sucrose, a phenolic resin, a naphthalene resin, a polyvinyl alcohol resin, a urethane resin, polyimide, a furan resin, a cellulose resin, an epoxy resin, a polystyrene resin, a resorcinol-based resin, a phloroglucinol-based resin, a coal-derived pitch, a petroleum-derived pitch, a tar and a mixture of two or more thereof.

Abstract: In some implementations, the anode includes a current collector, a first anode mixture layer formed on at least one surface of the current collector, and a second anode mixture layer formed on the first anode mixture layer. The first anode mixture layer and the second anode mixture layer include a carbon-based active material, respectively. The first anode mixture layer includes a first binder, a first silicon-based active material, and a first conductive material. The second anode mixture layer includes a second binder, a second silicon-based active material, and a second conductive material. Contents of the first conductive material and the second conductive material are different from each other with respect to the total combined weight of the first anode mixture layer and the second anode mixture layer. Types of the first silicon-based active material and the second silicon-based active material are different from each other.

Abstract: A method for producing a solid electrolyte for an all-solid state battery, the solid electrolyte having the following chemical formula XM2(PS4)3, where X is lithium (Li), sodium (Na), silver (Ag) or magnesium (Mg0,5) and M is titanium (Ti), zirconium (Zr), germanium (Ge), silicon (Si), tin (Sn) or a mixture of X and aluminium (X+Al) and the method including: mixing powders so as to obtain a powder mixture; pressing a component with powder mixture; and sintering component for a period of time equal to or greater than 100 hours so as to obtain the solid electrolyte. The solid electrolyte exhibits the peaks in positions of 2?=13.64° (±1°), 13.76° (±1°), 14.72° (±1°), 15.36° (±1°), 15.90° (±1°), 16.48° (±1°), 17.42° (±1°), 17.56° (±1°), 18.58° (±1°), and 22.18° (±1°) in a X-ray diffraction measurement using CuK? line. The disclosure is also related to a method of producing a solid electrolyte.

Abstract: An electrode assembly comprises: a negative electrode, a separator, and at least two or more positive electrodes which are stacked in the electrode assembly with the negative electrode and the separator, each of the positive electrodes including a positive electrode active material applied to a surface of a positive electrode collector, wherein the positive electrode active material contains nickel, cobalt, and manganese, and a first composition ratio of nickel, cobalt, and manganese in the positive electrode active material applied to a first one of the positive electrodes is different from a second composition ratio of nickel, cobalt, and manganese in the positive electrode active material applied to a second one of the positive electrodes. The first and second positive electrodes may be stacked to adequately improve thermal stability and capacity.

Abstract: The present disclosure relates to a positive active material for a lithium rechargeable battery and a lithium rechargeable battery including the same, which include a first compound represented by Chemical Formula 1 and a second compound represented by Chemical Formula 2, and a content of the first compound is 65 wt % or more based of the positive active material of 100 wt %. Lia1Nib1Coc1Mnd1M1e1M2f1O2-f1[??Chemical Formula 1] Lia2Nib2COc2Mnd2M3e2M4f2O2-f2[??Chemical Formula 2] Chemical Composition 1 and 2 of each composition and molar ratio is as defined in the specification. Each composition and molar ratio of Chemical Formula 1 and 2 is as defined in the specification.

Abstract: The present invention relates to a battery cell including an electrolyte ion concentration measurement unit and a method for measuring an electrolyte concentration using same. The battery cell according to the present invention comprises a measurement unit in which a first electrode plate, an insulation film, and a second electrode plate are sequentially stacked on one another, wherein the measurement unit is inserted between a separator of the battery cell and an electrode thereof, and thus can directly measure an electrolyte concentration between the separator and the electrode. Therefore, the battery cell can be simply manufactured and has excellent stability.

Abstract: A positive electrode active material for non-aqueous electrolyte secondary battery containing a lithium-nickel-manganese composite oxide formed of secondary particles with a plurality of aggregated primary particles, in which the positive electrode active material is represented by a general formula (1): LidNi1?a?b?cMnaMbNbcO2+?, at least a part of niobium is solid-dissolved inside the primary particles, and an amount of lithium to be eluted into water when the positive electrode active material is immersed in water is 0.02% by mass or more and 0.10% by mass or less with respect to the entire positive electrode active material as determined by a neutralization titration method.

Abstract: A separator includes: a first porous substrate; and a second porous substrate arranged on at least one surface of the first porous substrate; wherein the elongation at break of the second porous substrate is greater than the elongation at break of the first porous substrate in at least one of the machine and transverse directions of the separator. The separator has a high tensile strength and an elongation at break and good heat resistance, and may improve the safety performance of the energy storage device when the separator is applied to the energy storage device.

Abstract: An electrolyte solution for an alkali metal-sulfur-based secondary battery, an alkali metal-sulfur-based secondary battery, and a module containing the alkali metal-sulfur-based secondary battery. The electrolyte solution includes a positive electrode containing a carbon composite material that contains a carbon material and a sulfur-containing positive electrode active material. The carbon material has a pore volume ratio (micropores/mesopores) of 1.5 or higher. The electrolyte solution contains a fluorinated ether represented by the following formula (1): R11—(OR12)n11—O—R13. In the formula, R11 and R13 are the same as or different from each other, and are each an alkyl group optionally containing a fluorine atom, with at least one of R11 or R13 containing a fluorine atom; R12 is an alkylene group optionally containing a fluorine atom; and n11 is 0, 1, or 2.

Abstract: A battery electrode composition is provided comprising core-shell composites. Each of the composites may comprise a core and a multi-functional shell.

Abstract: A novel composite material which includes silicon and carbon, the amount of silicon being 1-80 wt.-% and at least 90 wt.-% of the composite material being in a density range between a lower density threshold value p*1 and an upper density threshold value p*2. The density threshold values have the following relation: ?*1,2=(1±?)·?, wherein ? is the mean density of the composite material and ±? is the variation range between the upper density threshold value ?*2 and the lower density threshold value ?*1, the amount of ? being <0.10.

Abstract: The positive electrode active material for a non-aqueous electrolyte secondary cell according to an embodiment of the present disclosure is characterized in having a Ni-containing lithium transition metal oxide having a layered structure; the proportion of Ni in the lithium transition metal oxide being 91 to 96 mol % relative to the total number of moles of metal elements excluding Li; a transition metal being present in the Li layer of the layered structure at an amount of 1 to 2.5 mol % relative to the total number of moles of transition metals in the Ni-containing lithium transition metal oxide; and the Ni-containing lithium transition metal oxide being such that the half width n of the diffraction peak for the (208) plane in an X-ray diffraction pattern obtained by X-ray diffraction is 0.30°?0?0.50°.