We know AC is cheap, easy to make and also have high surface area and also shows good capacitance behaviour! But are we all so much interested in Graphene, CNT? Even though they have very good electrical properties, they are too expensive to make. And moreover most graphene which we use in supercapacitor electrodes are not pristine (most great qualities will be missing) and more importantly will not have very high surface area(nowhere close to 2600m2/g). Personally, I think the only advantage with Graphene and CNT is to make controlled nanostructure which would be slightly difficult with AC.
I am just curious what senior and fellow researchers think about this?!
Even i too think the same observation. But its not only nanostructure of graphene and CNT.
In CNT orientation will bring single walled and multi walled carbon tube, that time the property will vary.
Graphene have huge application, There are plenty of review articles available, For example i will enclosed here one articles.
Especially because it is several times cheaper than the CNT and Graphene until have found methods for quick and easy ways to obtain these materials in any case where the activated carbon does the job it's more profitable to be used for practical purposes. When we use as a catalyst deposited on the surface of activated carbon if the active phase of the nano-sized if not poisoned in the process of work, it is eternal pure nanomaterials. They at that time will agglomerate and activity of the catalyst will decrease rapidly, and also will become the export of nanoparticles from the reactor.
Each type of material present advantages and drawback.
Today, the advantages of ACs regarding other advanced carbon materials is that we know how to do using the raw materials available along the word. ACs are universal materials with very important application in key aspect as the water potabilization, air treatments, etc even in developing countries.
Nevertheless, we must work to improve the efficiency of materials available, in order to improve also their performances.
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