Hitachi, Ltd. and Japan's Tohoku University Institute of Metal Materials developed a new lithium-ion technology, the use of a composite hydride as a solid electrolyte to reduce the internal resistance of all-solid-state lithium-ion battery.
This new battery technology expands the range of applications for heat-resistant lithium-ion batteries, such as large motor industrial machinery and autoclavable medical devices. This technology eliminates the need to use a cooling system like a conventional lithium-ion battery, so in the future it may be possible to design a compact battery system that reduces the total cost of ownership.
High energy density lithium-ion batteries have found widespread use in a variety of applications, such as portable devices (smartphones and tablets), electric vehicles, and renewable energy.
Conventional lithium ion batteries include a separator, a positive electrode layer, and a negative electrode layer. Organic electrolyte in the battery, during charging and discharging, lithium ions in the middle of the two conductive layers.
However, the traditional electrolyte of lithium ion battery has the problem of heat resistance. Due to the volatile organic electrolytes, so the maximum operating temperature limit of about 60 ℃. As a result, conventional lithium-ion batteries can not be used in high-temperature environments without a cooling system.
Therefore, to be used in high temperature environment, the need to develop non-volatile solid electrolyte. However, the lithium ion conductivity of the solid electrolyte is lower than that of the organic electrolyte, so the internal resistance of the all-solid-state lithium ion battery must be reduced to put it into commercial use.
Shin-ichi, a professor at Japan's Tohoku University Institute of Metal Materials and Orimo Laboratory, conducted a study on the new solid state electrolysis of LiBH4 complex hydride. The study confirmed that LiBH4 has a very high level of solid electrolyte in a high temperature range from room temperature to 150 ° C The conductive properties.
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