• 专利标题:   Making doped single graphene sheets involves oxidizing graphite to non-electrically conductive graphite oxide followed by exfoliating in solvent, depositing metal or metal oxides, and reducing to electrically conductive graphene sheets.
  • 专利号:   WO2012148880-A2, WO2012148880-A3, US2013337351-A1, US8834959-B2
  • 发明人:   DO I, DRZAL L T, MONGA A
  • 专利权人:   MONGA A, DO I, DRZAL L T, MONGA A, DRZAL L T, DO I, MONGA A, DRZAL L T, DO I, MONGA A
  • 国际专利分类:   B01J019/12, C01B031/02, C23C016/26, H01M010/0525, B05C009/10, B05D003/06, B05D005/12, B32B015/04, B32B005/16, B32B009/04, B82Y030/00, C01B003/00, H01G009/155, H01L031/02, H01M010/44, H01M004/13, H01M008/06, C01B031/04, H01G011/36, H01M004/583, H01M008/04
  • 专利详细信息:   WO2012148880-A2 01 Nov 2012 C01B-031/02 201276 Pages: 26 English
  • 申请详细信息:   WO2012148880-A2 WOUS034744 24 Apr 2012
  • 优先权号:   US517801P, US444114

▎ 摘  要

NOVELTY - Preparing doped single graphene sheets, involves: a) providing graphite; b) oxidizing the graphite to non-electrically conductive graphite oxide; c) exfoliating the graphite oxide in a solvent; d) depositing nanoparticles selected from metals and metal oxides on the product of (c); and e) reducing the product of (d) to electrically conductive single graphene sheets. USE - For preparing doped single graphene sheets useful in an energy conversion/storage device selected from a fuel cell, battery, particularly a lithium ion battery, super capacitor, ultra super capacitor, or a solar cell (claimed). ADVANTAGE - The process is relatively less expensive, and it produces single graphene sheets with a high surface area of at least 1500 m2/g that provides opportunities for storage and conversion of energy. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) storing hydrogen gas involving: subjecting hydrogen gas to a conductive single graphene sheet having nanoparticulate metal or metal oxides doped on it; (2) a composition of matter which is expanded graphite nanoplatelets (xGnP) decorated with metal or metal oxide nanoparticles; (3) an apparatus assembly for providing expanded intercalated graphite in a gaseous atmosphere using chemical treatment, comprising: an apparatus for expanding graphite selected from microwave and radiofrequency; a feed unit for feeding the intercalated unexpanded graphite into an enclosed chamber; sorting unit in the chamber for differentiating between the expanded graphite and the intercalated unexpanded graphite; exit unit from the chamber for receiving the expanded graphite from the sorting unit; and unit for depositing nanoparticles selected from metals and metal oxides on the expanded graphite; and (4) manufacturing expanded intercalated graphite decorated with metal or metal oxide nanoparticles, involving: providing intercalated graphite; expanding the intercalated graphite using an apparatus selected from microwave and radiofrequency; feeding the expanded intercalated graphite into an enclosed chamber containing gas; sorting the material in the chamber to provide intercalated expanded graphite; moving the intercalated expanded graphite from the chamber; and depositing nanoparticles selected from metals and metal oxides on the surface of the expanded intercalated graphite.