• 专利标题:   Composite particulate for use as anode in lithium battery e.g. lithium-ion battery, lithium metal battery, lithium-sulfur battery and lithium-air battery, comprises anode active material particles dispersed in high-elasticity polymer matrix or encapsulated by high-elasticity polymer shell.
  • 专利号:   US2022190322-A1
  • 发明人:   JANG B Z, ZHAMU A
  • 专利权人:   GLOBAL GRAPHENE GROUP INC
  • 国际专利分类:   H01M010/052, H01M004/36, H01M004/62
  • 专利详细信息:   US2022190322-A1 16 Jun 2022 H01M-004/36 202260 English
  • 申请详细信息:   US2022190322-A1 US118980 11 Dec 2020
  • 优先权号:   US118980

▎ 摘  要

NOVELTY - Composite particulate comprises anode active material particles 14 dispersed in a high-elasticity polymer matrix or encapsulated by a high-elasticity polymer shell 12, where the composite particulate has a diameter of 10 nm - 50 mum, the high-elasticity polymer matrix or shell has a recoverable tensile strain of more than 5%, when measured without an additive or reinforcement dispersed in it, and a lithium-ion conductivity of more than 10-8 S/cm at room temperature and the high-elasticity polymer comprises a crosslinked polymer network of chains from a polymer containing carboxylic and/or hydroxyl groups or from a polymer that is water-soluble prior to crosslinking. USE - Composite particulate for use as an anode in lithium battery such as lithium-ion battery, lithium metal battery, lithium-sulfur battery, lithium-selenium battery and lithium-air battery (all claimed). ADVANTAGE - The composite particulate provides lithium-ion battery having high cycle life, high reversible capacity, low irreversible capacity, small particle sizes for high-rate capacity and compatibility with commonly used electrolytes, and is prepared readily or easily in large quantities. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: 1. an anode, which comprises multiple composite particulates as an anode material, a conductive additive, and a binder resin that bonds the composite particulates and conductive additive together; 2. a lithium battery, which comprises the anode, a cathode and an electrolyte in ionic contact with the anode and cathode and an optional porous separator; and 3. a method for manufacturing multiple composite particulates, which involves: a1. dispersing multiple particles of the anode active material in a precursor polymer solution to form a suspension, where the particles are fully embedded or immersed in the precursor solution, which comprises a polymer dispersed in a liquid solvent or a liquid mixture of monomers, initiator or catalyst, and an optional curing agent and the polymer or monomer comprises carboxylic and/or hydroxyl functional group; b1. operating a secondary particle-forming procedure to shape the suspension into multiple droplets and removing the liquid solvent from the droplets; and c1. crosslinking the polymer or polymerizing and crosslinking the monomers to form the composite particulates. DESCRIPTION OF DRAWING(S) - The drawing shows schematic view of composite particulates comprising high-elasticity polymer-encapsulated anode particles. Anode active material core (10) High-elasticity polymer shell (12) Anode active material particles (14) Carbon layer (20) Conductive protection layer (26)