Easy Method to Make Mesoporous Graphene for Energy Storage Systems ACS_AMI
By Hussain AhmedOct 10 2022Reviewed by Megan Craig, M.Sc. Graphene is a suitable active substance for electric double-layer supercapacitors because of its high electric conductance and lightweight composition. However, a porous configuration is needed to maximize the specific energy density of graphene for many novel energy storage applications.
However, conventional energy storage systems made of activated carbons have a poor power density due to the insufficient specific contact area, leading to the inadequate creation of an electric double layer between electrode material and electrolyte. Mesoporous Graphene for Energy Storage Applications Related StoriesGraphene is regarded as a potential carbonaceous material because of its remarkable electrical conductance. However, the high van der Waals contact between the graphene sheets makes stacking unavoidable, producing a limited available surface area.
Several research groups have attempted synthesizing 3D mesoporous graphene using a catalytic template-assisted technique. However, due to a volatile catalytic template, the pore diameter and contact area were rather high. Therefore, developing an efficient technique for synthesizing 3D mesoporous graphene with a high contact area for high-energy-density EDLCs remains a major challenge.
Interestingly, the highly porous architecture of mesoporous graphene was successfully preserved during catalytic decomposition even at high temperatures since the mechanical resilience of the PS-b-P2VP composite is adequate to act as rigid reinforcement and inhibit nickel catalyst aggregation. The large specific contact area and small pore diameter allowed a considerable number of electrolytes to enter mesoporous graphene. Moreover, the electrically conducting pathways in the mesoporous graphene sheets resulted in highly efficient interfacial electron transfer.
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