Researchers at Pohang University of Science and Technology recently achieved a breakthrough in the development of solid-state batteries. They were able to significantly improve the efficiency and lifespan of the technology.

Batteries will play an increasingly important role in the future. Because more and more electric cars are rolling on the streets. At the same time, energy suppliers are looking for solutions to be able to store solar energy at night or on cloudy days.

A research team from Pohang University of Science and Technology (POSTECH) recently made a significant breakthrough in developing suitable solid-state batteries. The research results could pave the way for safer and longer-lasting energy sources.

To do this, the researchers developed a novel method of electrode deposition that is intended to significantly increase the efficiency and service life of solid-state batteries. Background: Secondary batteries, such as those in electric vehicles and energy storage systems, are generally based on liquid electrolytes.

Breakthrough in the development of solid-state batteries

The flammability of liquid electrolytes poses the risk of fires, which is why research is increasingly examining solid electrolytes in solid-state batteries. The hope: A safer solution that can be used almost anywhere.

To address the challenges of battery safety, the POSTECH team developed an anode protection layer made from a functional binder for solid-state batteries. This layer appears to have good lithium transfer properties, prevents accidental electrode deposition and promotes a process of so-called “bottom electrode deposition”.

This is to ensure an even separation of lithium from the bottom of the anode. By analyzing with a scanning electron microscope, the researchers confirmed the stable electrode position and detachment of lithium ions. This significantly reduces unnecessary lithium consumption.

Further research should improve lifespan and energy density

The solid-state batteries the team developed demonstrated stable electrochemical performance over an extended period of time. And that too with a lithium metal that is thinner than ten micrometers. Professor Soojin Park, who led the research, explained that this electrodeposition strategy allowed researchers to develop a durable solid-state battery system.

Further research should aim to extend battery life and increase energy density. Furthermore, participating partners plan to commercialize lithium metal anodes for the next generation of secondary batteries. The discovery offers new perspectives for the development of energy storage technologies and highlights the potential of solid-state batteries as a safe and efficient energy source for the future.

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