According to foreign media reports, Australian advanced materials technology company Talga Resources (Talga Resources) announced the preliminary test results of its graphene silicon-based lithium-ion battery anodes developed in the UK. The structure was funded by the British government "Safevolt "The first successful result of the project. The project was led by Targa and was jointly carried out with alliance partners Johnson Matthey, the University of Cambridge, and the manufacturing research group TWI.
In this project, Targa is developing a high-energy-density graphene silicon battery anode product called TalnodeTM-Si, which has a significantly higher energy density than other commercial graphite anodes. Talga Managing Director Mark Thompson said that TalnodeTM-Si will meet the growing demand for lithium-ion batteries, which have a higher capacity, can increase the range of electric vehicles, and increase the working hours of portable electronic devices.
The major lithium-ion battery manufacturers all increase the energy density of the battery by increasing the silicon content in the graphite anode, but the use of silicon is hindered by battery life and stability issues. Talga's test results show that TalnodeTM-Si using graphene can maintain its stability as silicon expands, thereby achieving higher energy density while ensuring battery life.
Recently, several automakers have expressed their intention to adopt a higher energy-to-weight ratio in the next generation of battery packs, and other large groups in the battery anode material supply chain have also used silicon technology in graphite to produce silicon oxide-based graphite. For example, Volkswagen estimates that from 2018 to 2025, its battery energy density can be increased by 25%, and the goal is to use 20% silicon in the battery anode by 2020.
Higher capacity batteries can benefit the industry by extending the operating time of electronic devices or increasing the range of electric vehicles. In addition, higher capacity can also reduce costs, because the increased energy density can reduce the cost per unit of energy (Kw / hr) in the entire battery pack. The increased battery capacity is a very important indicator for customers, especially for Chinese customers, because the subsidies for China's new energy vehicles are related to their battery energy density, and China's new energy vehicles are profitable.
Currently, Talga is further testing and optimizing TalnodeTM-Si at the battery material factory of the Maxwell Centre at the University of Cambridge in the United Kingdom. A temporary sample of the anode is being prepared for delivery to Asian end customers under a confidential material transfer agreement .
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