Scientists Achieve Breakthrough in All-Solid-State Batteries

Scientists at Osaka Metropolitan University have made a significant breakthrough in the development of all-solid-state batteries, which are expected to be the next-generation energy storage devices. The researchers achieved an unprecedented stabilization of the high-temperature phase of Li3PS4, a critical material for all-solid-state batteries, which results in exceptional ionic conductivity even at room temperature.

All-Solid-State Batteries

All-solid-state batteries are expected to be widely used in a variety of applications, including electric vehicles, because of their high levels of safety and enhanced energy density, which will help to realize a sustainable society. The batteries work by facilitating the movement of lithium ions through a solid electrolyte. The development of solid electrolytes with high ion conductivity, which enables the rapid movement of lithium ions, is critical to the success of this technology.

The Breakthrough

Professor Akitoshi Hayashi and Associate Professor Atsushi Sakuda of the Graduate School of Engineering at Osaka Metropolitan University led a research group that succeeded in stabilizing the high-temperature phase of Li3PS4 (α-Li3PS4) at room temperature via rapid heating to crystallize Li3PS4 at 400 °C min−1. This achievement makes it possible to develop materials for all-solid-state batteries with higher performance.

The Significance

The stabilization of the high-temperature phase of Li3PS4 is a significant achievement because this phase is generally recognized for its superior ionic conductivity. The challenge has been to stabilize this phase at room temperature. Professor Hayashi explained that Li3PS4 showcases varied crystal structures depending on temperature variations. This breakthrough is the culmination of nearly 20 years of dedicated research into the development of all-solid-state battery materials.

The achievement of the stabilization of the high-temperature phase of Li3PS4 is a major breakthrough in the development of all-solid-state batteries. This technology has the potential to revolutionize the energy storage industry by providing high levels of safety and enhanced energy density. With further research and development, this technology could become widely used in a variety of applications, including electric vehicles.