According to reports, scientists at Tohoku University and the High Energy Accelerator Research Organization have developed a new composite hydride lithium superionic conductor. The researchers said that this new material, designed by designing a hydrogen cluster (composite anion) structure, shows extremely high stability for lithium metal, making lithium metal the ultimate anode material for all-solid-state batteries, giving birth to energy density to date. The highest all solid state battery.
An all-solid-state battery with an anode of lithium metal is expected to solve the problems of electrolyte leakage, flammability and limited energy density of conventional lithium-ion batteries. It is generally believed that lithium metal is the best anode material for all-solid-state batteries because it has the highest theoretical capacity. And the lowest potential in known anode materials.
Lithium-ion-conducting solid electrolytes are a key component of all-solid-state batteries, but the problem is that most existing solid electrolytes have chemical/electrochemical instability that inevitably causes unwanted side reactions at the interface, leading to interfaces. The increase in resistance greatly reduces the performance of the battery during repeated charge and discharge.
Researchers say that complex hydrides have received much attention in solving problems associated with lithium metal anodes because of their excellent chemical and electrochemical stability for lithium metal anodes. The new solid electrolytes they get are not only highly ionic, but also very stable to lithium metal, so they are a real breakthrough for all solid state batteries using lithium metal anodes.
The researchers said: "This development will not only help us find lithium hydride conductors based on complex hydrides in the future, but also open up new trends in the field of solid electrolyte materials. The new solid electrolyte materials are expected to promote high energy density electrochemical devices. development of."
Electric vehicles expect high-energy-density and safe batteries to achieve a satisfactory cruising range. If the electrodes and electrolytes do not fit well on the issue of electrochemical stability, there will always be a hurdle on the road to widespread electric vehicles. The successful cooperation between lithium metal and hydride has opened up new ideas. The lithium element has unlimited potential. Electric cars that last for thousands of kilometers and smart phones that are on standby for a week may not be far away.
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