Graphite, natural or synthetic, is composed of covalently bonded carbon atoms that are crystalline in structure due to Van der Waals attraction of its layered carbon sheets. It has a gray or black color, with thermal and electrical conductivity. With its properties, it can be used in many “industrial applications like in batteries and fuel cells” (Olson 2003). Although graphite has its useful characteristics, its performance is limited due to its large particles’ size resulting to “low aspect ratio” (Neja, Manjula and Subhas 2012, vol.2, 74-78). For this reason, studies to increase high aspect ratio lead to researches in decreasing its size by making graphite nanoplatelets, graphite nanosheets and even the mono-layered carbon sheets known as
…show more content…
2015, vol. 3, 75-87). Graphite nanosheets on the other hand have thinner sheets that range from about 2 to 5 nanometers (Chen, Weng, Wu, D and Wu, C. 2003, vol. 39, 2329-2335).Graphene,on the other hand, is made up of pure carbon in which where the atoms are fixed into a single layer, thus it creates a “honeycomb” pattern (Graphene-Battery.net 2013). Graphene is also a rare two-dimensional form of carbon. Graphite on the other hand, is a layered material and may be seen as a layered form of two-dimensional graphene crystals poorly joined together. Graphene is also very interesting for it has a resemblance to the Dirac spectrum for massless fermions. In terms of the electron spectrum, it is a kind of continuum-medium description that is functional for electron wavelengths with larger interatomic spreads. This makes graphene a perfect energy source for supercapacitors (Katsnelson 2007, vol. …show more content…
The electrodes consist of a metallic collector, which is the most conductive part of a functional material, the high surface area part may also be found here. Both electrodes are separated by a membrane, the separator allows the movement of the charged ions it does not allow the conductance of the electricity. The supercapacitor’s voltage is known by the decomposition voltage of the electrolyte and mainly depends on the temperature of the environment, the intensity of the current, and the lifetime required (Shneuwly and Gallay 2000).
EDLCs are known to be some kind of battery. This has a pair of polarizable electrode with collector electrodes, an electrolyte solution, and a separator. These are the components that are needed to be tested in making an EDLC. Based on different theories, exact capacitance of an activated is directly proportional to the exact surface area. Nevertheless, this does not occur in reality. It was told that a few activated carbons with a smaller surface area give off a bigger exact capacitance rather than those with a larger surface area (Jayalakshmi and Balasubramanian 2008, vol. 3,
2015, vol. 3, 75-87). Graphite nanosheets on the other hand have thinner sheets that range from about 2 to 5 nanometers (Chen, Weng, Wu, D and Wu, C. 2003, vol. 39, 2329-2335).Graphene,on the other hand, is made up of pure carbon in which where the atoms are fixed into a single layer, thus it creates a “honeycomb” pattern (Graphene-Battery.net 2013). Graphene is also a rare two-dimensional form of carbon. Graphite on the other hand, is a layered material and may be seen as a layered form of two-dimensional graphene crystals poorly joined together. Graphene is also very interesting for it has a resemblance to the Dirac spectrum for massless fermions. In terms of the electron spectrum, it is a kind of continuum-medium description that is functional for electron wavelengths with larger interatomic spreads. This makes graphene a perfect energy source for supercapacitors (Katsnelson 2007, vol. …show more content…
The electrodes consist of a metallic collector, which is the most conductive part of a functional material, the high surface area part may also be found here. Both electrodes are separated by a membrane, the separator allows the movement of the charged ions it does not allow the conductance of the electricity. The supercapacitor’s voltage is known by the decomposition voltage of the electrolyte and mainly depends on the temperature of the environment, the intensity of the current, and the lifetime required (Shneuwly and Gallay 2000).
EDLCs are known to be some kind of battery. This has a pair of polarizable electrode with collector electrodes, an electrolyte solution, and a separator. These are the components that are needed to be tested in making an EDLC. Based on different theories, exact capacitance of an activated is directly proportional to the exact surface area. Nevertheless, this does not occur in reality. It was told that a few activated carbons with a smaller surface area give off a bigger exact capacitance rather than those with a larger surface area (Jayalakshmi and Balasubramanian 2008, vol. 3,