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Russian scientists develop new titanium-based cathode materials for metal ion batteries

Date2020-7-23 On Click:429

Researchers at the Energy Technology (CEST) Center of Skoltech Institute of Technology in Russia have created a new type of cathode material based on titanium fluorophosphate. The material exhibits excellent energy performance and stability when the discharge current is high. Performance.
Now, the rapid development of electric transportation and renewable energy requires the use of commercial, safe and inexpensive energy storage solutions based on metal ion batteries. The existing lithium-ion battery technology has encountered a major obstacle, and the price is high. It is speculated that the world may soon run out of the lithium and cobalt materials needed to produce the cathode of this battery, thereby further pushing up the price of the battery. It can determine the functional characteristics and energy performance of the battery.

Most of the research looking for alternative technologies is to use more accessible and cheaper elements (such as potassium) to replace lithium to make batteries. Cobalt can be replaced by the more common and environmentally friendly iron, manganese and titanium elements.

Titanium is the tenth most common element in the earth's crust. It is found all over the world, and it is easy to obtain stable and non-toxic titanium-containing reagents. However, despite the above-mentioned obvious advantages, the use of titanium compounds in battery cathode materials will result in low electrochemical potential, which has limited the specific energy of the battery for a long time.

Scientists at Skolkovo Institute of Technology have successfully manufactured a commercially attractive advanced cathode material, which is based on titanium fluorophosphate KTiPO4F, has a high electrochemical potential, and has a high charge and discharge rate. Bottom, showing excellent stability.

Professor Stanislav Fedotov said: “The results of this experiment are very good, and it destroys the dominant paradigm that has long existed in the “battery world” on the surface, that is, the potential of titanium is low, so titanium-based materials can be used as anodes. We believe that the discovery of high-voltage KTiPO4F The materials provide new impetus for the search and development of new titanium-containing cathode materials with unique electrochemical properties."

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