On March 21, a Swedish high-tech materials company Talga Resources Ltd (ASX: TLG) announced that the company had successfully tested a graphite anode material Talnode â„¢ -C that enables lithium batteries to achieve high performance at freezing temperatures. It is understood that Talga is developing graphene and graphite-reinforced products for the multi-billion dollar global battery, coating, construction and composite materials markets.
Usually under freezing conditions, the capacity retention rate and cycle efficiency of lithium ion batteries will become lower, resulting in shorter operating time of devices such as laptop computers and mobile phones, or shorter driving range of electric vehicles, In the colder countries of the northern hemisphere, it is measured that the mileage of electric vehicles can be reduced by 41%. Low temperature will also lead to lithium dendrite deposition in lithium metal deposition, leading to internal short circuit, battery fire and other problems. How to maintain excellent performance of lithium battery at low temperature is a key technology.
Talga's Talnode-C products perform better than the anode materials on the market, and still maintain 100% capacity and 100% cycle efficiency at freezing temperature (0 ° C). As shown below:
Figure 1 Comparison of capacity retention ratio between graphite anode and TalnodeTM-C on the market
After 30 charge and discharge cycles at 25 ° C; after 60 charge and discharge cycles at 0 ° C
Mark Thompson, Managing Director of Talga, said, "Talnode-C can maintain the performance of lithium batteries in cold weather applications, and traditional graphite anodes are difficult or fail to function. This also proves that Talga's anode materials are fast The potential in the growing lithium battery market. "At present, this product has been tested at an independent battery research institute in Japan.
With its unique process, Talga has developed into a high-tech advanced materials and technology company, creating a supply chain that vertically integrates graphite into graphene products.
Talga owns several high-grade graphite assets in northern Sweden, including three high-grade graphite mineral resources of Vittangi, Jalkunen and Raitajärvi. The Nunasvaara graphite deposit is part of the Vittangi project and is the world's highest grade JORC / NI 43-101 graphite mineral resource (total resource of 12.3 million tons, 25.5% graphite)
In addition, Talga also revealed that its graphene silicon battery anode material called Talnode-Si, compared with graphite-only anodes, lithium ion batteries can store about 70% more energy. At the end of February, commercial samples were sent to large international battery companies.
Talga also extended its business to cobalt mines, buying the Kiskama project from 2012, which is the largest cobalt deposit in Sweden. In addition, Talga has other high-grade copper-cobalt-gold projects in the early stages of exploration in northern Sweden.
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