Graphene Manufacturing Group Ltd. ("GMG" or the "Company") provides the latest progress update on its Graphene Aluminium-Ion Battery technology ("G+AI Battery") being developed by GMG and the University of Queensland ("UQ").
The Company is pleased to announce that it has identified minimal temperature rise when charging and discharging GMG's Graphene Aluminium-Ion Battery. This is observed when charging and discharging multiple times at high C- rates (C rate measures the current in a which a battery can be charged or discharged, eg. 1 C rate the battery should be able to be fully discharged in 1 hour). As shown in Figure 1, the temperature of a high-quality lithium-ion battery, produced by a world leading brand, can exceed 60 degrees Celsius when being discharged at the maximum current allowed (4.8 C-rate - an estimated 0.8 A/g on the cathode active material mass). By comparison, GMG's Graphene Aluminium-Ion Battery temperature is 29 degrees Celsius when it is discharged at even higher current density (20 C-rate - approximately 2.0 A/g on the cathode active mass). The temperatures of both batteries were taken with the room temperature at 23.5 degrees Celsius (+/- 0.5 degrees Celsius).
The Company intends to validate with further testing the possibility that its battery may not need thermal management, even at high charge and discharge rates. This creates the potential for significant cost reduction at the system level and highly reduced system cost.
- GMG's Graphene Aluminium-Ion Battery may not need a thermal management system when used in an electric vehicle battery pack or an energy storage system, which will lead to a simpler, more cost effective and higher energy density battery pack. Most Lithium-Ion Battery Packs require a thermal management system, such as the one shown in Figure 2 below.
Next Steps Toward Commercialisation & Market Applications
The Company continues to see a broad range of applications for a completed GMG Graphene Aluminium Ion Battery - utilising its ultra-high power-density and nominal energy density characteristics. Along with Rio Tinto, a range of global companies have confidentially expressed their interest in working with GMG in the following vertical sectors:
Next Generation Battery Performance
GMG's next generation Graphene Aluminium Ion Battery performance data (as tested and calculated on coin cells), as compared to the most commonly available lithium-ion batteries, is shown below in Figure 5, with a list of its beneficial characteristics.
Performance results for the pouch cells could be significantly different and will be communicated upon successfully producing a repeatable and fully 3rd party tested 1000 mAh+ battery pouch cell.