T. Paronyan, H. Vardanyan
Hexalayer LLC,
United States
Keywords: rotated graphene, Li-ion battery, high energy density
Summary:
Secondary batteries, and in particular lithium-ion batteries (LIBs), remain the key energy storage of current technologies, and it has been modernized in novel portable electronics and e-mobility segments. Though, current battery performance still cannot sustain the increasing power demand for new electronic devices such as drones, EV vehicles, the defense industry etc. Carbon-based batteries are well known most reliable cells due to their high energy density, high power density, stability, low cost, and safety. However, the key challenge of those devices is their limited energy density, and battery anode holds the solution to this issue. We develop a uniquely structured novel graphene powder that performs extremally high reversible capacities reaching up to 1700 Ah/kg applied as an anode in LiBs prototype cells. The retained capacity of those cells remains over 90% throughout 500 charge/discharge cycling process holding over 93% Coulombic efficiency. The mechanism of such high lithium intercalation indicates the weakened interlayer interaction between graphene layers due to the rotated behavior. Significant high energy density LiBs can be developed with these rotated graphene structures by adjustment of the battery components such as cathode, electrolyte, and anode film. Hexalayer's aim is to scale up this innovative graphene technology for high energy density rechargeable batteries as a safe and long-lasting mobile energy storage.