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Lithium metal may become the final anode material for all solid-state batteries
Researchers said that this new material, realized by designing a hydrogen cluster (composite anion) structure, shows extremely high stability to lithium metal, making lithium metal expected to become the final anode material for all-solid-state batteries, which will give birth to The all-solid-state battery with the highest energy density so far.
It is reported that scientists from Tohoku University and the High Energy Accelerator Research Organization in Japan have developed a new composite hydride lithium superion conductor. The researchers said that this new material, realized by designing a hydrogen cluster (composite anion) structure, has shown extremely high stability to lithium metal, making lithium metal hopeful to become the final anode material for all-solid-state batteries, giving birth to the energy density so far. The highest all-solid-state battery.
The all-solid-state battery with lithium metal anode is expected to solve the problems of electrolyte leakage, flammability, and limited energy density of traditional lithium-ion batteries. It is generally believed that lithium metal is an all-solid-state battery. The best anode material for batteries because it has the highest theoretical capacity and the lowest potential among known anode materials.
Lithium ion conductive solid electrolyte is a key component of all solid-state batteries, but the problem is that most existing solid electrolytes have chemical/electrochemical instability, which is inevitable Ground will cause unnecessary side reactions at the interface, leading to an increase in interface resistance, and greatly reducing the performance of the battery during repeated charging and discharging.
Researchers said that composite hydrides have received widespread attention in solving problems related to lithium metal anodes because of their excellent chemical and electrochemical stability to lithium metal anodes. . The new solid electrolyte they obtained not only has high ionic conductivity, but is also very stable to lithium metal. Therefore, it is a real breakthrough for all solid-state batteries using lithium metal anodes.
Researchers said: 'This development will not only help us find lithium ion conductors based on composite hydrides in the future, but will also open up new trends in the field of solid electrolyte materials. The new solid electrolyte material is expected to promote the development of high-energy-density electrochemical devices.'
Electric vehicles expect high-energy-density and safe batteries to achieve satisfactory cruising range. If electrodes and electrolytes do not cooperate well in terms of electrochemical stability, there will always be a hurdle in the popularization of electric vehicles. The successful cooperation between lithium metal and hydride opened up new ideas. Lithium has unlimited potential. An electric car with a battery life of thousands of kilometers and a smartphone with a one-week standby may not be far away.