Abstract: A positive-electrode material for a lithium ion secondary battery contains a lithium complex compound that is represented by the formula: Li1+aNibMncCodTieMfO2+?, and has an atomic ratio Ti3+/Ti4+ between Ti3+ and Ti4+, as determined through X-ray photoelectron spectroscopy, of greater than or equal to 1.5 and less than or equal to 20. In the formula, M is at least one element selected from the group consisting of Mg, Al, Zr, Mo, and Nb, and a, b, c, d, e, f, and a are numbers satisfying ?0.1?a?0.2, 0.7<b?0.9, 0?c<0.3, 0?d<0.3, 0<e?0.25, 0?f<0.3, b+c+d+e+f=1, and ?0.2???0.2.

Abstract: A battery system with a passive thermal management system is formed from a plurality of battery cells arranged on a printed circuit board assembly. In some cases, the printed circuit board assembly may include a flexible printed circuit board that is folded along an axis forming an upper and lower portion of the printed circuit board assembly. The thermal management system may include fire-blocking foam members individually attached to each battery cell. The battery cells may be arranged in a grid-like pattern to allow for a spacing arrangement between the battery cells to keep a failing battery cell from negatively affecting an adjacent battery cell. In addition, the flexible printed circuit card may include a fuse for each battery cell to shut off any current flow to a faulty battery cell if it begins to fail causing current flow to exceed beyond a predetermined current limit. The battery system may be a conformal wearable battery.

Abstract: A method of treating the surface of a positive electrode active material that is capable of inhibiting a reaction at the interface between a sulfide-based solid electrolyte and the positive electrode active material. A positive electrode active material particle for sulfide-based all-solid-state batteries, the surface of which is reformed, using the method and a sulfide-based all-solid-state battery, the charge/discharge characteristics of which are improved, including the same are also disclosed. The positive electrode active material particle for sulfide-based all-solid-state batteries manufactured using a dry-type method exhibits larger capacity than a positive electrode active material particle for sulfide-based all-solid-state batteries manufactured through a conventional wet-type process. In addition, the manufacturing process is simplified, and the amount of byproducts is reduced.

Abstract: Provided are a binder resin for an electrode of a lithium secondary battery containing a solvent-soluble polyimide having a repeating unit represented by the following Formula [I], and a method of producing the binder resin for an electrode. (In the formula, Z represents an aromatic or alicyclic tetracarboxylic dianhydride residue, and Ar is an aromatic diamine residue having a carboxyl group and an aromatic diamine residue having an aromatic ether bond, or an aromatic diamine residue having a phenylindan structure).

Abstract: Disclosed are anode electrode structures for microbial fuel cell (MFC) devices, systems and methods for treating wastewater and generating electrical energy through a bioelectrochemical waste-to-energy conversion process. In some aspects, an anode electrode includes a conductive core and a plurality of sheets of conductive textile material wound around the conductive core. In some aspects, the anode electrode is produced by cutting sheets of a conductive textile material to form a stem and a plurality of branches connected to the stem. The conductive textile material is pretreated to enhance the surface area, hydrophilicity, microbial attachment, and/or electrochemical activity of the conductive textile material. The sheets are stacked together and wound around a conductive core to produce the anode electrode.

Abstract: A negative-electrode core laminate of a portion of a negative-electrode core on which no negative-electrode active material layer is formed is bonded to a negative-electrode current collector by ultrasonic bonding. A core recess is formed in a bonding region of the negative-electrode core laminate bonded to the negative-electrode current collector by ultrasonic bonding, a region of the negative-electrode core laminate in which the core recess is formed includes a solid-state bonding layer and a central layer, the solid-state bonding layer being formed by solid-state bonding between layers of the negative-electrode core, the central layer being disposed between the solid-state bonding layers formed on both faces of the negative-electrode core. The average grain size of metal crystal grains constituting the solid-state bonding layer is smaller than the average grain size of metal crystal grains constituting the central layer.

Abstract: A positive-electrode core laminate of a portion of a positive-electrode core on which no positive-electrode active material layer is formed is bonded to a positive-electrode current collector by ultrasonic bonding. A core recess is formed in a bonding region of the positive-electrode core laminate bonded to the positive-electrode current collector by ultrasonic bonding, a region of the positive-electrode core laminate in which the core recess is formed includes a solid-state bonding layer and a central layer, the solid-state bonding layer being formed by solid-state bonding between layers of the positive-electrode core, the central layer being disposed between the solid-state bonding layers formed on both faces of the positive-electrode core, and the first average grain size of metal crystal grains constituting the solid-state bonding layer is smaller than the second average grain size of metal crystal grains constituting the central layer.

Abstract: The present application provide a silicon-oxygen compound, a secondary battery using it, and related battery modules, battery packs, and devices. The silicon-oxygen compound provided by the present application has a formula of SiOx, in which x satisfies 0<x<2. The silicon-oxygen compound contains both sulfur and aluminum element, and the sulfur element is present in an amount of 20 ppm˜300 ppm. The mass ratio of sulfur element to aluminum element is from 1.5 to 13.0. A secondary battery uses the silicon-oxygen compound provided in the present application, so that the secondary battery can have both long-cycle performance and high initial coulombic efficiency.

Abstract: A winding-type battery includes a battery case, a power generating element, a cap for blocking an opening of the battery case, and a gasket for insulating the battery case from the cap. The power generating element includes a first electrode, a second electrode, a separator interposed between them, and an electrolyte. The first electrode and the second electrode are wound via the separator to form an electrode group, and the first electrode is connected to the cap via a first current collecting lead, and the second electrode is connected to the battery case via a second current collecting lead. A groove is formed near the opening end of the battery case. The gasket includes: an annular seal portion interposed between a rim of the cap and the region from the groove to the end; and a tubular portion that is integrated with the seal portion, and is disposed closer to the electrode group than the seal portion is. The first current collecting lead is connected to the cap through a hollow in the tubular portion.

Abstract: Provided is a secondary battery, comprising a positive electrode, the positive electrode comprises a positive electrode material layer, and the positive electrode material layer comprises a positive electrode active material and a compound represented by structural formula I: the positive electrode active material includes one or more of the compounds represented by Li1+xNiaCobM?1?a?bO2?yAy and Li1+zMncL2?cO4?dBd; the positive electrode material layer meets the following requirements: 0.05?p·u/v?15 wherein, u is the percentage mass content of element phosphorus in the positive electrode material layer, and the unit is wt %; v is the percentage mass content of element M in the positive electrode material layer, element M is selected from one or two of Mn and Al, and the unit is wt %; p is the surface density of one single surface of the positive electrode material layer, and the unit is mg/cm2.

Abstract: A highly dispersed silicon-carbon solid sol, a preparation method and application thereof. In the high-dispersion silicon-carbon solid sol, the silicon is a dispersed substance, the carbon is a dispersion medium. The silicon is covered by a continuous carbon layer or buried in a continuous carbon phase; a size of the silicon is less than 80 nm at least in one of dimensions, and a mass percentage of the silicon in the highly dispersed silicon-carbon solid sol is 5% to 90%. The nano-silicon particles are covered by the continuous carbon phase, which is not only conducive to obtaining nano-silicon particles with very small sizes, but also can effectively prevent the late oxidation of nano-silicon.

Abstract: The invention relates to a lithium secondary battery including a positive electrode, a negative electrode including a negative active material, and an electrolyte, wherein the positive electrode includes a first positive active material of a lithium manganese cobalt oxide in Chemical Formula 1, and a second positive active material of a lithium transition metal oxide that occludes and releases lithium ions; an average particle diameter (D50) of the first positive active material is smaller than an average particle diameter (D50) of the second positive active material; and the first positive active material has lower first charge/discharge efficiency than that of the negative active material and has an irreversible capacity during the first charge/discharge that is larger than an irreversible capacity during the first charge/discharge of the negative active material.

Abstract: The present application discloses a negative active material, a method for preparing the same, and related secondary batteries, battery modules, battery packs and apparatus. The negative active material includes a core material and a polymer-modified coating layer on at least a part of its surface; the core material includes one or more of silicon-based materials and tin-based materials; the coating layer includes sulfur element and carbon element; in the Raman spectrum of the negative active material, the negative active material has scattering peaks at the Raman shifts of 900 cm?1˜960 cm?1, 1300 cm?1˜1380 cm?1 and 1520 cm?1˜1590 cm?1, respectively, in which the scattering peak at the Raman shift of 900 cm?1˜960 cm?1 has a peak intensity recorded as Il, the scattering peak at the Raman shift of 1520 cm?1˜1590 cm?1 has a peak intensity recorded as IG, and Il and IG satisfy 0.2?Il/IG?0.8.

Abstract: This application discloses a secondary battery and an apparatus containing the secondary batteries. The secondary battery includes a positive electrode plate and a negative electrode plate, the positive electrode plate comprising a positive electrode current collector and a positive electrode film comprising a positive active material; the negative electrode plate comprising a negative electrode current collector and a negative electrode film comprising a negative electrode active material, wherein the positive active material comprises one or more of layered lithium transition metal oxides and modified compounds thereof, the negative electrode active material comprises artificial graphite and natural graphite, and the negative electrode plate satisfies 0.02?I3R(012)/I2H(100)?0.

Abstract: A method of preparing a positive electrode active material includes forming a tungsten-doped lithium transition metal oxide, and washing the lithium transition metal oxide, wherein, in the washing, a hydroxide-based compound is added to a washing liquid during the washing, a positive electrode including a positive electrode active material prepared according to the method, and a lithium secondary battery including the positive electrode.

Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode containing a lithium transition metal oxide as a positive electrode active material, a negative electrode containing a carbon material as a negative electrode active material, and a nonaqueous electrolyte. The lithium transition metal oxide contains W and Si, and W and Si adhere to the surface of the carbon material constituting the negative electrode active material. The amount of W adhering to the surface of the carbon material is 2 times or less in terms of a molar ratio to the amount of Si adhering to the surface of the carbon material.

Abstract: A rechargeable battery according to an exemplary embodiment of the present invention includes: an electrode assembly; a casing which accommodates the electrode assembly and has an opening; a cap assembly which is coupled through the opening and seals the casing; a spacer which is positioned between the electrode assembly and the casing and has multiple holes; and a vent member which is formed on a bottom surface of the casing which is positioned opposite to the opening.

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 battery system includes a plurality of non-cylindrical shaped battery cells arranged on, and physically affixed to, a flexible printed circuit board (PCB). The PCB may include a bend axis that facilitates folding of the flexible PCB to form an upper portion of the flexible PCB and a lower portion of the flexible PCB. A central stiffener may be positioned between the upper portion and the lower portion of the flexible PCB using an adhesive foam tape to form a battery assembly. The battery system may include a flexible housing with an internal cavity that receives the battery assembly. The central stiffener, and the adhesive foam tape, may provide a degree of rigidity and/or absorption to the PCB to reduce localized deformation of the PCB when the battery system experiences shock forces and to prevent damage to components of the battery assembly. The stiffener may be formed from non-metallic material.

Abstract: Silicon-dominate battery electrodes, battery cells utilizing the silicon-dominate battery electrodes, and methods of manufacturing are disclosed. Such a battery cell includes a cathode, a separator, an electrolyte, and an anode. The anode comprises a current collector and active material on the current collector. The active material layer includes at least 50% silicon. A ratio of the electrolyte to Ah is over 2 g/Ah.