• 专利标题:   Manufacture of active electrode material used in electrode, involves providing mixed niobium oxide, combining niobium oxide with carbon precursor, heating intermediate material and introducing oxygen vacancies into niobium oxide.
  • 专利号:   WO2021074592-A1, CA3157162-A1, KR2022105637-A, CN114868278-A, EP4046213-A1, BR112022007323-A2, US2022380226-A1, IN202227028474-A, JP2023501778-W, HK40079649-A0
  • 发明人:   GROOMBRIDGE A S, ZHANG W, SANTHANAM S, S G A, SUMITRA S N
  • 专利权人:   ECHION TECHNOLOGIES LTD, ECHION TECHNOLOGIES LTD, ECHION TECHNOLOGIES LTD
  • 国际专利分类:   H01M004/131, H01M010/0525, H01M004/1391, H01M004/62, C01G033/00, H01M004/02, H01M004/36, H01M004/485, H01M010/44, H01M004/04, H01M004/58, C01B025/37, C01G041/00, C01G049/00, H01M004/48
  • 专利详细信息:   WO2021074592-A1 22 Apr 2021 202137 Pages: 55 English
  • 申请详细信息:   WO2021074592-A1 WOGB052485 08 Oct 2020
  • 优先权号:   GB015151, GB002487, GB008352, GB011681, GB013576, EP793067, CA3157162, BR11007323, CN80072794, KR716652

▎ 摘  要

NOVELTY - Manufacture of an active electrode material involves providing a mixed niobium oxide, combining the mixed niobium oxide with a carbon precursor to form an intermediate material, heating the intermediate material under reducing conditions to pyrolyze the carbon precursor forming a carbon coating on the mixed niobium oxide and introducing oxygen vacancies into the mixed niobium oxide. The carbon precursor comprises polyaromatic sp2 carbon and is selected from pitch carbons and/or graphene oxide. USE - Manufacture of active electrode material used in composition for electrodes of lithium ion battery (all claimed) for electric vehicles. ADVANTAGE - The method produces active electrode material having improved dispersibility of particulate material, improved capacity retention and high specific capacity. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) manufacture of electrode; (2) active electrode material, which comprises oxygen-deficient mixed niobium oxide comprising a carbon coating comprising polyaromatic sp2 carbon; (3) composition, which comprises active electrode material and at least one component selected from binder, solvent, conductive additive and/or additional active electrode material; (4) electrode, which comprises active electrode material in electrical in contact with a current collector, and forms an anode as lithium-ion battery; and (5) use of carbon precursor, which comprises polyaromatic sp2 carbon selected from pitch carbons and/or graphene oxide to improve the properties of mixed niobium oxide for use as an active electrode material, optionally to improve the initial coulombic efficiency of the mixed niobium oxide and/or to improve the specific capacity of the mixed niobium oxide.