Title:
METHOD FOR PREPARING HIGH-QUALITY GRAPHENE MATERIAL
Document Type and Number:
WIPO Patent Application WO/2020/248462
Kind Code:
A1
Abstract:
Disclosed is a method for preparing a high-quality graphene material, comprising: adding an electrolyte solution, a graphite raw material and an electrode to an electrolysis vessel, wherein the electrode is in contact with the electrolyte solution and physical isolation is formed between the electrode and the graphite raw material; applying an electric field to the electrode, and carrying out intercalation and cleavage when the graphite raw material is not in contact with the electrode, wherein the electrolyte is one of or a combination of sulfuric acid, nitric acid, phosphoric acid, boric acid, a sulfate, a nitrate, a phosphate, a borate, a carbonate, a bicarbonate, urea, formic acid, benzoic acid, acetic acid and an acetate; and cleaning a cleaved product, removing the electrolyte solution, and drying the product to obtain a high-quality graphene powder. In the method, graphite is intercalated with a peroxide generated when the electrolyte is subjected to an electrochemical reaction, and bubbles are generated during the intercalation process of the peroxide to carry out cleavage on the graphite structure, thereby achieving the high-efficiency cleavage of the graphite and the electrochemical preparation of high-quality graphene without coming into contact with the electrode.
Inventors:
HE PENG (CN)
DING GUQIAO (CN)
ZHANG PENGLEI (CN)
XIE XIAOMING (CN)
DING GUQIAO (CN)
ZHANG PENGLEI (CN)
XIE XIAOMING (CN)
Application Number:
PCT/CN2019/112571
Publication Date:
December 17, 2020
Filing Date:
October 22, 2019
Export Citation:
Assignee:
SHANGHAI INST MICROSYSTEM & INFORMATION TECH CAS (CN)
International Classes:
C01B32/19
Foreign References:
| CN110217784A | 2019-09-10 | |||
| CN107235485A | 2017-10-10 | |||
| CN103991862A | 2014-08-20 | |||
| CN104773730A | 2015-07-15 | |||
| CN106904602A | 2017-06-30 | |||
| CN103204494A | 2013-07-17 | |||
| US20130001089A1 | 2013-01-03 |
Other References:
WANG, H. S. ET AL.: "Anode coverage for enhanced electrochemical oxidation: a green and efficient strategy towards water-dispersible graphene", GREEN CHEMISTRY, vol. 20, 8 February 2018 (2018-02-08), XP055763997, ISSN: 1463-9270, DOI: 20200427093412A
Attorney, Agent or Firm:
SHANGHAI ZHI XIN PATENT AGENT LTD. (CN)
Download PDF: