• 专利标题:   Silicon-containing electrode formed by coating silicon-containing slurry onto conductive current collector, and drying, useful as anode in lithium electrochemical cell, where slurry comprises poly(carboxylic acid) binder and particulate anode active material in mixed solvent system.
  • 专利号:   US2023087760-A1
  • 发明人:   TRASK S, JANSEN A, SHI Z, ZHANG L
  • 专利权人:   UCHICAGO ARGONNE LLC
  • 国际专利分类:   C08K003/02, C08K003/04, C09D001/00, C09D007/20, C09D007/40, H01B001/22, H01M010/0525, H01M004/02, H01M004/04, H01M004/134, H01M004/1395, H01M004/38, H01M004/62
  • 专利详细信息:   US2023087760-A1 23 Mar 2023 H01M-004/62 202330 English
  • 申请详细信息:   US2023087760-A1 US987605 15 Nov 2022
  • 优先权号:   US886908, US987605

▎ 摘  要

NOVELTY - Silicon-containing electrode formed by coating a silicon-containing slurry onto a conductive current collector, and drying the resulting coating, is claimed. The slurry comprises: a poly(carboxylic acid) binder and a particulate anode active material in a mixed solvent system comprising a first solvent and a second solvent that is miscible with the first solvent. The first solvent is an amide compound (I). The second solvent is water, and/or organic solvent. The first solvent and the second solvent are present in the mixed solvent system in a respective volume ratio of 99:1- 1:9. The organic solvent comprises an alcohol, an ether, a nitrile, or an amide that is different from the amide of the first solvent. The particulate anode active material comprises silicon-containing particles, and/or carbon particles. USE - Silicon-containing electrode useful as an anode in lithium electrochemical cell, which is useful in a battery (all claimed). The battery is useful in electric vehicles, plug-in hybrid electric vehicles or portable electronic devices. ADVANTAGE - The battery has high specific capacities and efficiency. DETAILED DESCRIPTION - Silicon-containing electrode formed by coating a silicon-containing slurry onto a conductive current collector, and drying the resulting coating, is claimed. The slurry comprises: a poly(carboxylic acid) binder and a particulate anode active material in a mixed solvent system comprising a first solvent and a second solvent that is miscible with the first solvent. The first solvent is an amide compound of formula (I). The second solvent is water, and/or organic solvent. The first solvent and the second solvent are present in the mixed solvent system in a respective volume ratio of 99:1- 1:9. The organic solvent comprises an alcohol, an ether, a nitrile, or an amide that is different from the amide of the first solvent. The particulate anode active material comprises silicon-containing particles, and/or carbon particles. (R1,R2, R3 = H, alkyl, alkoxy, or a polyether group). INDEPENDENT CLAIMS are included for: (1) a lithium electrochemical cell, which comprises an anode, a cathode, a lithium ion-conducting separator between the anode and the cathode, and a lithium ion-containing electrolyte contacting the anode, the cathode, and the separator, where the anode is the silicon-containing electrode; and (2) a battery comprising electrochemical cells electrically connected together in series and/or in parallel. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of an electrochemical cell. 10Electrochemical cells 12First electrode 14Silicon-containing second electrode 16Porous separator 18Electrolyte