article · C – Journal of Carbon Research
This research investigates the chemical exfoliation of graphite to produce graphene oxide (GO) for supercapacitor applications, focusing on how the starting graphite material influences the final GO properties. Two different GOs were prepared from graphite materials with varying textural and structural characteristics, and comprehensive characterisation was performed using techniques such as Raman, X-ray diffraction, and scanning electron microscopy. The findings demonstrate that the crystallite size of the raw graphite directly affects the oxidation degree, surface functionality, and sheet size of the resulting GO. Building on these insights, an optimised GO was developed, achieving a high specific capacitance of 191 F·g−1. This superior electrochemical performance was attributed to the accessible specific surface area and oxygenated functional groups, which enhance the surface energy.
Understanding how the starting material affects graphene oxide quality is vital for developing more efficient energy storage devices. Supercapacitors, which use graphene oxide, offer fast charging and long lifespans, making them important for various electronic and power applications, from portable devices to electric vehicles.
This research provides fundamental insights into optimising graphene oxide production for high-performance supercapacitors. These findings could enable the development of more efficient energy storage solutions for applications requiring rapid power delivery and long cycle life. This appears to be early-stage research focused on material science and optimisation, laying groundwork for future applied development in energy storage technologies.
AI-generated from the published abstract. Always read the original work before citing.
The chemical exfoliation of graphite to produce graphene and its oxide is undoubtedly an economical method for scalable production. Carbon researchers have dedicated significant resources to developing new exfoliation methods leads to graphene oxides with high quality. However, only a few studies have been dedicated to the effect of the starting graphite material on the resulting GO. Herein, we have prepared two different GOs through chemical exfoliation of graphite materials having different textural and structural characteristics. All samples have been subjected to structural investigations and comprehensive characterizations using Raman, X-ray diffraction, scanning electron microscopy, TGA, N2 physisorption, and FTIR spectroscopy. Our results provide direct evidence of how the crystallite size of the raw graphite affects the oxidation degree, surface functionality, and sheet size of the resulting GO. Building on these significant understandings, the optimized GO achieves a highly specific capacitance of 191 F·g−1 at the specific current of 0.25 A·g−1 in an aqueous electrolyte. This superior electrochemical performance was attributed to several factors, among which the specific surface area was accessible to the electrolyte ions and oxygenated functional groups on the surface, which can significantly modify the electronic structure of graphene and further enhance the surface energy.
This page summarises published work. The authoritative version sits with the publisher.
DOI: 10.3390/c8020027
Is something wrong with this record? Report it or request removal.
Discussion
Have you built on this work, tried to replicate it, or seen it applied in practice? Share what you know. Verified researchers and MARATTO™ domain experts can open a discussion, and any member can reply. Contributions are reviewed before they appear.
No discussion yet. Open the first thread.
New to MARATTO™? Create a free account.
