Japan R & D new all-solid-state lithium-ion battery
Hitachi, Ltd. and Japan Institute for Materials Research, Tohoku University, Japan developed a new type of lithium electronics technology that uses a composite hydride as a solid electrolyte to reduce the internal resistance of all-solid-state lithium-ion batteries. This new battery technology can expand the application of heat-resistant lithium-ion batteries, such as large-scale motor industrial machinery, and heat autoclave medical equipment. This technology does not require the use of a cooling system like a conventional lithium-ion battery, so it may be designed as a compact battery system in the future, reducing the total cost of production. High-energy-density lithium-ion batteries have been widely used in various applications such as portable devices (smartphones and tablet computers), electric vehicles, and renewable energy. A conventional lithium ion battery includes a separator, a positive electrode layer, and a negative electrode layer (FIG. 1a). In the organic electrolyte in the battery, lithium ions conduct electricity between the two electrode layers during charging and discharging. However, the organic electrolyte of the conventional lithium ion battery has a problem of heat resistance. Since the organic electrolyte is volatile, the operating temperature is limited to about 60°C. Therefore, if there is no cooling system, traditional lithium-ion batteries cannot be used in high temperature environments. Therefore, to be applied to high temperature environment, it is necessary to develop a solid electrolyte that is not volatile. However, the solid electrolyte has lower lithium ion conductivity than the organic electrolyte, and it is necessary to reduce the internal resistance of the all-solid-state lithium ion battery before it can be put into commercial use. Prof. Shin-ichi of Tohoku University's Institute of Metal Materials and Orimo Laboratories conducted a study on the new solid-state electrolysis of LiBH4 composite hydride. It was confirmed that LiBH4 new type solid-state electrolyte is high in temperature from room temperature to 150°C. The conductive properties.
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