Functionalized graphene foam as electrode for improved electrochemical storage

What is it about?

The modified graphene surface enabled a high pseudocapacitive effect on the GF. A specific capacitance of 133.3 F g− 1 , power density ∼145.3 kW kg− 1 and energy density ∼ 4.7 W h kg− 1 were achieved based on the functionalized foam in 6 M KOH aqueous electrolyte.

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Why is it important?

In summary, based on the results obtained, it shows that PCA can be used successfully to functionalize GF without disrupting its sp2 hybrid structure via non-covalent functionalization approach. This technique not only ensures efficient usage of the surface area offered by the foam but also reduces the agglomeration of the sheets due to the presence of oxygen-containing groups and hydroxyls from the PCA molecules which lead to improve capacitance of the GF.