• 专利标题:   Nanoparticles, useful in electrochemical cells and supercapacitors for storing and/or releasing lithium ions, comprise component A of metals, semimetals, metal compounds or semimetal compounds e.g. lithium cobalt oxide, and graphene coating.
  • 专利号:   US2011292570-A1, TW201206712-A, US8611070-B2, TW562898-B1
  • 发明人:   IVANOVICI S, YANG S, FENG X, MUELLEN K, MULLEN K
  • 专利权人:   MAXPLANCKGES FOERDERUNG WISSENSCHAFTEN, BASF SE, BASF SE, MAX PLANCK GES FOERDERUNG WISSENSCHAFTEN, MAX PLANCK GES FOERDERUNG WISSENSCHAFTEN
  • 国际专利分类:   B82Y030/00, C25B011/02, C25B011/04, H01B001/04, H01G009/155, H01M004/02, B32B009/00, C01B031/04, H01G009/004, H01M004/36, H01G009/00
  • 专利详细信息:   US2011292570-A1 01 Dec 2011 H01G-009/155 201181 Pages: 7 English
  • 申请详细信息:   US2011292570-A1 US107278 13 May 2011
  • 优先权号:   US334588P, US107278

▎ 摘  要

NOVELTY - Nanoparticles comprise at least one component A comprising metals, semimetals, metal compounds or semimetal compounds and at least one coating of graphene. USE - The nanoparticles are useful in electrochemical cells and in supercapacitors for storing and/or releasing lithium ions (all claimed). ADVANTAGE - The nanoparticles: utilize graphene which exhibits good electrical conductivity and high structural flexibility hence withstands the change in volume which occurs during a charge/discharge cycle; and can be used as anode-active materials in lithium ion batteries which have high capacity and remain stable even over a large number of charge/discharge cycles. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) producing nanoparticles, comprising providing a suspension comprising a suspension medium and nanoparticles (containing component A) with positive surface charge, adding graphene oxide particles to the suspension, where the graphene oxide particles accumulate on the nanoparticles, and converting the graphene oxide particles accumulated on the nanoparticles to graphene; and (2) storing and/or releasing lithium ions in electrochemical cells and in supercapacitors by providing nanoparticles as material which stores and/or releases lithium ions in the electrochemical cells and in supercapacitors.