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According to foreign media, Talga Resources, an Australian advanced material technology company, released the preliminary test results of its graphene silicon based lithium ion battery anode developed in the UK. This structure is the first successful result of the "Safevolt" project funded by the British government. The project was led by Talga and carried out jointly with alliance partners Johnson Matthey, the University of Cambridge and TWI, a manufacturing research group.

In this project, Talga is developing a graphene silicon battery anode product with high energy density, called TalnodeTM Si, which has significantly higher energy density than other commercial graphite anodes. Mark Thompson, the managing director of Talga, said that TalnodeTM Si would meet the growing demand for lithium-ion batteries, which have higher capacity, can increase the range of electric vehicles and the working time of portable electronic devices.

Major lithium ion battery manufacturers improve the battery energy density by increasing the silicon content in the graphite anode, but the use of silicon is hindered by battery life and stability problems. Targa's test results show that TalnodeTM Si using graphene can maintain its stability when silicon expands, thus ensuring battery life and achieving higher energy density.

Recently, several automobile manufacturers expressed their intention to adopt higher energy weight ratio in the next generation of battery packs, and other large groups in the battery anode material supply chain have also used the silicon technology in graphite to produce silicon oxide based graphite. For example, Volkswagen estimates that from 2018 to 2025, its battery energy density can increase by 25%, and the goal is to use 20% silicon in the battery anode by 2020.

Higher capacity batteries can benefit industry by extending the running 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 China's subsidies for new energy vehicles are related to its battery energy density, and China's new energy vehicles are profitable.

At present, Talga is further testing and optimizing TalnodeTM Si in the battery material factory of Maxwell Centre, Cambridge University, UK, and is preparing a temporary sample of the anode for delivery to Asian end customers according to the confidential material transfer agreement.

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