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METHOD FOR PRODUCING GRAPHENE, AND GRAPHENE PRODUCTION EQUIPMENT 新技術説明会

Foreign code F200010272
File No. 評18-0002KG
Posted date 2020年11月24日
Country 世界知的所有権機関(WIPO)
International application number 2019JP045320
International publication number WO 2020105646
Date of international filing 令和元年11月19日(2019.11.19)
Date of international publication 令和2年5月28日(2020.5.28)
Priority data
  • 特願2018-218478 (2018.11.21) JP
Title METHOD FOR PRODUCING GRAPHENE, AND GRAPHENE PRODUCTION EQUIPMENT 新技術説明会
Abstract Provided are: a method for producing graphene, the method including a stripping step for applying a voltage between a pair of electrodes 30, 32 in a state in which the pair of electrodes are disposed in an electrolyte solution 20 that includes water and at least one electrolyte selected from the group consisting of inorganic acids, inorganic salts, organic acids, and bases, and in which graphite 10 is disposed between the pair of electrodes without being in contact with the electrodes, whereby graphene is stripped from the graphite, and a recovery step for recovering the graphene generated by stripping from the graphite; and graphene production equipment for implementing the method.
Outline of related art and contending technology BACKGROUND ART
Is composed of carbon atoms in the graphene sheet-like crystallized carbon, electrically conductive, thermal stability, toughness, and has excellent characteristics such as flexibility, the semiconductor device, solar cell, the transparent conductive film or the like in various fields are expected to be used.
As a practical production technique of graphene, graphite or graphene by delamination as the starting material is a top-down technique has attracted attention. In general, such as potassium permanganate and sulfuric acid and a strong oxidizing agent is concentrated sulfuric acid (strong acid) is used, graphite and chemically, graphene is manufactured, a large amount of reagent required for the particular attention to handling pure water for consumption, is demanded the development of new peeling method.
In recent years, graphite as an electrode in the electrolytic solution is energized, causing delamination of the graphite, graphene may be the electrochemical peeling method has attracted attention (for example, see Patent Document 1-7). For example, graphite as an anode using a low-concentration sulfuric acid at a relatively low voltage (for example 10V) is subjected to electrolysis, 1 peeled off within a short period of time that the graphite, graphene can be obtained.
On the other hand, N- (Bu4NBF4) methyl-2-pyrrolidone and tetrabutylammonium tetrafluoroborate (NMP) solution including an organic electrolyte, anode, cathode, and graphite powder was immersed in a high voltage is applied to 1100V after, 330000/s 1 in the high shear treatment of the method of obtaining graphene has been known (see Non-Patent Document 1).
  • Applicant
  • ※All designated countries except for US in the data before July 2012
  • KOGAKUIN UNIVERSITY
  • OKAYAMA UNIVERSITY
  • Inventor
  • HASHIMOTO, Hideki
  • ASOH, Hidetaka
  • NISHINA, Yuta
IPC(International Patent Classification)
Specified countries National States: AE AG AL AM AO AT AU AZ BA BB BG BH BN BR BW BY BZ CA CH CL CN CO CR CU CZ DE DJ DK DM DO DZ EC EE EG ES FI GB GD GE GH GM GT HN HR HU ID IL IN IR IS JO JP KE KG KH KN KP KR KW KZ LA LC LK LR LS LU LY MA MD ME MG MK MN MW MX MY MZ NA NG NI NO NZ OM PA PE PG PH PL PT QA RO RS RU RW SA SC SD SE SG SK SL SM ST SV SY TH TJ TM TN TR TT TZ UA UG US UZ VC VN ZA ZM ZW
ARIPO: BW GH GM KE LR LS MW MZ NA RW SD SL SZ TZ UG ZM ZW
EAPO: AM AZ BY KG KZ RU TJ TM
EPO: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
OAPI: BF BJ CF CG CI CM GA GN GQ GW KM ML MR NE SN ST TD TG
Reference ( R and D project ) http://www.ns.kogakuin.ac.jp/~wwb1027/
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