Porous graphene structures for energy storage

Purpose and goal:

The purpose of the project was to explore the possibility to create porous 3D structures from Bright Day Graphene’s bio-based graphene. Then to test the porous graphene structures as supercapacitor electrodes and as lithium-ion anodes. The project was a successful first step towards a product that can utilize two of the most valuable properties of graphene: the specific surface and its conductivity in an optimal way for energy storage.

Expected results and effects:

It is possible to create porous structures from the Bright Day Graphene biobased graphene. The material forms electrode structures that are stable without any additive. The electrochemical characterisation shows that the material has great properties as a supercapacitor electrode and that it could contribute to fast charging lithium-ion batteries.

Additional work is required to optimize the material to get a maximum specific capacitance as well as to perform more in-depth studies of its properties as a lithium-ion anode. Approach and implementation:

The porous structures was synthesised with Bright Day Graphene’s biobased graphene in the Bright Day Graphene lab. From these structures electrodes where casted on carbon felt, that was tested with CV and galvanostatic measurements. The specific capacitance were calculated on the basis of the results. The material was also casted on copper and tested as a lithium-ion anode in a t-cell with a LiNiCoMn2 based cathode.