Graphene Manufacturing Group unveils break-through in Li-Ion cell chemistry.
Graphene Manufacturing Group Ltd. (TSX-V: GMG) (“GMG” or the “Company”) share further performance data of the graphene aluminium-ion coin cell batteries using the patent-pending surface perforation of graphene synthesised by the Company and the University of Queensland (“UQ”).
The experiments were performed at the Australian Institute for Bioengineering and Nanotechnology (“AIBN”) at UQ. Testing confirmed a very high cycle rate for graphene aluminium-ion coin cell batteries together with minimal reduction in performance over a 3,000 cycle experiment period (which includes charging up to full charge and discharge down to near full discharge) at very high charging rates – including at 2 Ampere per gram (“A/g”) of cathode material for 1000 cycles, 5 A/g of cathode material for 1000 cycles and then 10 A/g of cathode material for a further 1000 cycles.
GMG graphene is currently being used to produce coin cell prototypes for customer testing. A commercial prototype for the coin cell is targeted before the end of 2021.
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Source: University of Queensland. All testing was carried out on coin cells with perforated GMG graphene in aluminium ion battery at ambient temperature cycling from 2.4V to 0.5V, 1000 cycles at 10 Coulomb or 10 C (2 A/g) providing ~ 200 milli-Ampere-hour/gram (“mAh/g”) of capacity, 1000 cycles at 30 C (5 A/g) providing >150 mAh/g of capacity and 1000 cycles at 66 C (10 A/g) providing > 150 mAh/g.
Dr Ashok Nanjundan, GMG’s Chief Scientific Officer said
These results show a very high cycling rate for over 3000 cycles with negligible reduction in performance and at a very high charging rate up to 66 Coulomb or 66 C which is in comparison to what is typically seen with lithium-ion batteries between 600 and 1000 cycles at much lower charging rates of 1/5 C where performance typically reduces to 60% of original capacity.
GMG will make further disclosures regarding the performance and development of these graphene aluminium ion batteries as the research and development program progresses.
About GMG
GMG is an Australian based clean-tech disruptive company listed on the TSXV (TSXV:GMG) that produces graphene and hydrogen by cracking methane (natural gas) instead of mining graphite.
By using the company’s proprietary process, GMG can produce high quality, low cost, scalable, ‘tuneable’ and no/low contaminant graphene – enabling demonstrated cost and environmental improvements in a number of world-scale planet-friendly/clean-tech applications.
Using this low input cost source of graphene, the Company is developing value-added products that target the massive energy efficiency and energy storage markets.
The Company is also pursuing additional opportunities for GMG Graphene, including developing next-generation batteries, collaborating with world-leading universities in Australia, and investigating the opportunity to enhance the performance of lube oil, biodiesel and diesel fuels.
GRAPHENE ALUMINIUM-ION BATTERY PERFORMANCE DATA, June 22, 2021
