Patent
Method for electrochemically preparing graphene
Liu Liwei,Liqiong Wu,Li Weiwei,Geng Xiumei,Li Peng +4 more
- 05 Dec 2012
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TL;DR: In this paper, a method for electrochemically preparing graphene, which preferably comprises the steps of pressing a high-purity graphite raw material to form a graphite electrode, carrying out anodization through the graphite electrodes by using sulfuric acid aqueous solution or acetic acid and the like mixed acid solution as an electrolyte, and obtaining expanded graphite by high temperature or microwave and other methods.
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Abstract: The invention discloses a method for electrochemically preparing graphene, which preferably comprises the steps of pressing a high-purity graphite raw material to form a graphite electrode, carrying out anodization through the graphite electrode by using sulfuric acid aqueous solution or acetic acid and the like mixed acid solution as an electrolyte to prepare a graphite intercalation product, and obtaining expanded graphite by high temperature or microwave and other methods; and then pressing the expanded graphite to prepare a reaction electrode, and carrying out secondary electrochemical intercalation and expansion to finally obtain laminar graphene. According to the invention, in the preparing process, potassium permanganate and other strong oxidizers are not used, and the damage of the strong oxidizers to the structure and performance of graphene are avoided; alkali metal, fuming sulfuric acid oxydol and other inflammable and explosive dangerous substances are not used, and toxic or harmful substances are not introduced, so that the production is safe and environment friendly; and at the same time, the method is simple in process flow, easy to operate, low in cost, high in yield, mild in reaction conditions and low in energy consumption, and is suitable for industrialized large-scale production.
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Citations
Patent
Method for continuous preparation of graphene oxide nanoplatelets
Songfeng Pei,Wencai Ren,Kun Huang,Hui-Ming Cheng +3 more
- 29 Sep 2017
TL;DR: In this paper, a method for continuous preparation of graphene oxide nanoplatelets based on electrochemical treatment is presented, which has the advantages of no metal impurities of a product, controllable degree of oxidation of graphene, continuousness and automation of a process, safety, low emission, etc.
9
Patent
Preparation method of high specific surface area graphene
Cheng Xiantao
- 24 Feb 2016
TL;DR: In this paper, a method of high specific surface area graphene preparation is presented, which includes the steps of taking graphite as the positive pole, adopting metal or non-metal as the negative pole, using an inorganic salt solution as the electrolyte solution, and carrying out electrochemical reaction by a pulse voltage process or cyclic voltammetry so as to obtain an electrolyte mixed system.
7
Patent
Preparation method of flake graphene and flake graphene device prepared by same
Wang Jian,Wang Yefan +1 more
- 01 Apr 2015
TL;DR: In this paper, expanded graphite flakes are obtained from flake graphite as a raw material by virtue of expanding and rolling, and then laminated on a metal sheet, the compound sheet serves as a working electrode in an electrolyte solution and is electrified to obtain a graphite interlayer compound which is relatively low in valence number and relatively high in yield.
6
Patent
Preparation method of graphene nanobelt
Zhou Mingjie,Yuan Xinsheng,Wang Yaobing,Liu Daxi +3 more
- 25 Jun 2014
TL;DR: In this paper, a preparation method for a graphene nanobelt was proposed, which consisted of successively putting a carbon nanotube into an acid solution and an alkaline solution and carrying out stirring, then carrying out filtering, cleaning the carbon nanobube, soaking the carbon-notube with an organic solvent, subjecting the carbonnanotube to ultrasonic treatment and drying the carbon nano-tubes after filtering, and then under the protection of inert gas, heating the pretreated carbon nanoteutube to a temperature of 1000 to 1200 DEG C
5
Patent
Method for preparing graphene dispersion liquid through electrochemically assisted ultrasonic method
Yang Jinghui,Yang Qing,Wang Zhongjin +2 more
- 07 Sep 2018
TL;DR: In this article, a method for preparing a high-concentration stable graphene dispersion liquid through an electrochemically assisted ultrasonic method, wherein the method has advantages of costsaving, improved graphene yield and environmental pollution reducing.
4
References
High-yield synthesis of few-layer graphene flakes through electrochemical expansion of graphite in propylene carbonate electrolyte
TL;DR: A solution route inspired by the lithium rechargeable battery is demonstrated for the high-yield exfoliation of graphite into highly conductive few-layer graphene flakes (average thickness <5 layers).
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Patent
Methods of forming graphene by graphite exfoliation
Kian Ping Loh,Junzhong Wang +1 more
- 24 Jun 2011
TL;DR: In this paper, a graphite sample (10) having atomic layers (11) of carbon, introducing a salt (12) and a solvent (14) into the space between the atomic layers, expanding the space using organic molecules and ions from the solvent and the salt.
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Patent
Environmentally benign graphite intercalation compound composition for exfoliated graphite, flexible graphite, and nano-scaled graphene platelets
Aruna Zhamu,Bor Z. Jang +1 more
- 27 Jul 2007
TL;DR: A carboxylic-intercalated graphite compound composition for the production of exfoliated graphite, flexible graphite or nano-scaled graphene platelets was proposed in this paper.
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