Graphene integration in Si/Graphite anode for high-energy Li-ion batteries
Ilham Bezza
Aarhus University, Denmark
The radical increase in the energy demands of diverse industries has led to the co-utilization of Si and graphite seeming as a commercially sustainable method for getting high energy devices. The main drawback is the significant volume expansion upon the electrochemical process, causes cracks in the electrode and leads to rapid capacity fading. Functional graphene was introduced as an additive to the Si/Graphite electrode to overcome this drawback. The functional graphene produced at Danish Graphene exhibits exceptional dispersibility in both aqueous and organic solvents and could be used as additive in cathode and anode. A promising impact has been seen with a cathode material in terms of capacity and cycle life.
Herein, the graphene, in different ratios, is integrated by simple addition of a drop-in graphene paste during the electrode preparation. SEM and electrochemical tests were carried out to investigate the impact of graphene on the Si/Gr anode, in terms of ICE and stability.