According to reports, 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, which is realized through the design of hydrogen cluster (composite anion) structure, shows extremely high stability for lithium metal, which is expected to become the final anode material of all Solid-state battery, and promotes the generation of all Solid-state battery with the highest energy density so far.
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 the best anode material for all Solid-state battery, because it has the highest theoretical capacity and the lowest potential among known anode materials.
Lithium ion conduction solid electrolyte is a key component of all Solid-state battery, but the problem is that most of the existing solid electrolytes have chemical/electrochemical instability, which will inevitably cause unnecessary side reactions at the interface, leading to increased interface resistance, and greatly reducing the battery performance during repeated charge and discharge.
Researchers have stated that composite hydrides have received widespread attention in addressing issues related to lithium metal anodes, as they exhibit excellent chemical and electrochemical stability towards lithium metal anodes. The new solid electrolyte they obtained not only has high ionic conductivity, but also is very stable for lithium metal. Therefore, it is a real breakthrough for all Solid-state battery using lithium metal anode.
The researchers stated, "This development not only helps us find lithium ion conductors based on composite hydrides in the future, but also opens up new trends in the field of solid electrolyte materials. The obtained new solid electrolyte materials are expected to promote the development of high energy density electrochemical devices.
Electric vehicles expect high energy density and safe batteries to achieve satisfactory range. If the electrodes and electrolytes cannot cooperate well on electrochemical stability issues, there will always be a barrier on the road to the popularization of electric vehicles. The successful cooperation between lithium metal and hydride has opened up new ideas. Lithium has unlimited potential. Electric cars with a range of thousands of kilometers and smartphones with a one week standby may not be far away.
Post time: Jul-12-2023
