In 2017, ElECJECT first introduced graphene technology into the product line.

Let’s define some terms here:

Composition of Graphene Composite Battery

Please note that the graphene composite cell is not a pure graphene battery. Theoretically, it is still a lithium battery but with graphene composite materials added to the positive electrode to increase the activity. On the negative graphite, the surface is coated with layers of graphene coating, which reduces impedance. Graphene composite-based cells have the advantage of having the charge, discharge rate and cycle life that is greatly increased, while the cell’s internal resistance is greatly reduced. However, the only disadvantage is that the energy density is much lower than the normal lithium cells.

Based on the exclusive JetSafe™ (link) and graphene composite battery, Elecjet develops the USB–C PD 60W mobile power Apollo series. We’ll take Apollo Traveller as an example to explain the basic principles in detail.

Apollo Traveller’s battery is 500mAh with 60W. The maximum input to the battery terminal is 20A (the battery voltage is 3V- 4.25 full, and 20Ah is estimated at 3V), which also means that the required magnification of the battery cell is 20A / 5000 mAh = 4C, and the charging rate of regular lithium batteries is 1C, which obviously does not meet the requirements. However, we assume that this factor is ignored considering that regular cells can support 4C because its internal resistance is relatively large, reaching 30m. When the 20A is sinking, there is a 0.6V (20A*0.003) voltage pressure that rises immediately. This means that the battery core is already in a slow charge state at 3.6V, and the graphene composite material has a relatively low internal resistance about 1-3 mo, and the pressure rise is very small based on the full power charging.