OpenAIRE is about to release its new face with lots of new content and services.
During September, you may notice downtime in services, while some functionalities (e.g. user registration, login, validation, claiming) will be temporarily disabled.
We apologize for the inconvenience, please stay tuned!
For further information please contact helpdesk[at]

fbtwitterlinkedinvimeoflicker grey 14rssslideshare1
Almeida, António Carranca de (2016)
Languages: English
Types: Master thesis
Subjects: Graphene, Graphene Oxide, Supercapacitors, Laser reduction, Electrochemical, :Engenharia e Tecnologia::Engenharia dos Materiais [Domínio/Área Científica]
The modern world is gasping for electrical energy, from our homes to our daily used devices such as phones, computers and even to our cars. Everything needs to be connected to a battery and the solution existent is becoming obsolete. The market is with a huge gap and supercapacitors are the answer for that space. Graphene assumes a role play in this field for its amazing surface area and its conductivity, making it a perfect candidate for the electrodes of this devices. In this work, two synthesis of graphene were produce: laser reduction of graphene oxide and electrochemical exfoliation of graphite. The first one allows to develop patterns and build the devices in graphene oxide film, producing 2D supercapacitors. The geometry and the influence of the electrolyte were studied to maximize the capacitance. The graphene produced were analysed for its conductivity, quality and uniformity by CV curves, SEM and Raman Spectroscopy. The electrochemical exfoliation allows to start from graphite and use a salt solution with application of voltage, which is an economic and safer alternative for producing graphene. Several concentrations of Na2SO4 were tested and all the material produced by this technique was characterized with Raman Spectroscopy, SEM and TEM images to evaluate the procedure.
  • No references.
  • No related research data.
  • No similar publications.

Share - Bookmark

Funded by projects

  • EC | TransFlexTeg

Cite this article

Cookies make it easier for us to provide you with our services. With the usage of our services you permit us to use cookies.
More information Ok