TANGENT GRADIENT CONCENTRATION MATERIAL FOR BATTERY, DIGITAL GRADIENT CONCENTRATION MATERIAL FOR BATTERY

    公开(公告)号:US20200099045A1

    公开(公告)日:2020-03-26

    申请号:US16140234

    申请日:2018-09-24

    摘要: The invention provides a cathode active material having a discrete change in concentrations of a first base region and a second pulse region. Also provided is a method for preparing a cathode active material, the method having the steps: supplying chelating agent, aqueous basic solution and a first aqueous metal salt solution to a reactor to create a base region; supplying a second aqueous metal-salt solution to a reactor to form a pulse region, wherein the second aqueous metal-salt solution is intermittently or continuously added during or after the creation of the base region; thermally treating the base region and the pulse region to create active metal precursors; mixing the precursors with lithium salt to produce a mixture; and thermally treating the mixture.

    SYSTEMS AND METHODS FOR DESIGNING NEW MATERIALS FOR SUPERLUBRICITY

    公开(公告)号:US20200019656A1

    公开(公告)日:2020-01-16

    申请号:US16036039

    申请日:2018-07-16

    IPC分类号: G06F17/50 G06F9/451

    摘要: A method for designing new materials for superlubricity comprises developing, on a computational system, a computational supercell comprising x unit cells of a base material, each unit cell comprising y atoms of the base material. The computational system replaces randomly chosen z atoms of the base material with an impurity atom of an impurity material to form a candidate material. The computational system determines volumetric strain of the candidate material. In response to the volumetric strain exceeding a predetermined threshold, the computational system determines that the candidate material has superlubricity. The computational system displays the candidate material to a user if the candidate material has superlubricity.

    Electrolyte additives for lithium-ion batteries under high-voltage operation

    公开(公告)号:US10461364B2

    公开(公告)日:2019-10-29

    申请号:US15492260

    申请日:2017-04-20

    摘要: A non-aqueous electrolyte for a lithium-ion battery comprises a lithium salt and an additive in an organic solvent. The additive comprises a di-substituted malonate silyl ester compound, in which the hydrogens of the malonate methylene group are replaced by substituents R1 (e.g., alkyl) and X (e.g., halogen). Each of the carboxylic acid groups of the malonate are esterified by a monovalent silyl group such as —Si(R4)3; or the two carboxylic acid groups are esterified by a single divalent silylene group such as —Si(R5)2— to form a ring therewith. Each R4 and R5 independently is alkyl, phenyl, or alkoxy; and each substituted-alkyl comprises an alkyl moiety substituted with one or more group selected from alkenyl, alkynyl, hydroxy, halogen, alkoxy, carboxylic acid, carboxylic ester, carboxylic amide, phenyl, sulfonic acid, and phosphonic acid.

    Transparent nanocrystalline diamond coatings and devices

    公开(公告)号:US10410860B2

    公开(公告)日:2019-09-10

    申请号:US15676895

    申请日:2017-08-14

    摘要: A method for coating a substrate comprises producing a plasma ball using a microwave plasma source in the presence of a mixture of gases. The plasma ball has a diameter. The plasma ball is disposed at a first distance from the substrate and the substrate is maintained at a first temperature. The plasma ball is maintained at the first distance from the substrate, and a diamond coating is deposited on the substrate. The diamond coating has a thickness. Furthermore, the diamond coating has an optical transparency of greater than about 80%. The diamond coating can include nanocrystalline diamond. The microwave plasma source can have a frequency of about 915 MHz.