New Method for Safer Batteries: Bottom Electrodeposition Proves SuccessfulRevolutionary Technique Boosts Performance of All-Solid-State Batteries

Researchers successfully improve performance and durability of all-solid-state batteries using a unique technique called bottom electrodeposition.

The breakthrough method was recently published in the journal Small. Instead of relying on traditional liquid electrolytes, these batteries use solid electrolytes and lithium metal to provide a safer alternative for applications like electric vehicles and energy storage systems.

In the world of secondary batteries, liquid electrolytes have been the standard for powering electric vehicles and energy storage systems. However, their flammability has led to ongoing research to find safer alternatives. One promising option is the use of all-solid-state batteries which utilize solid electrolytes and lithium metal.

In all-solid-state batteries, lithium is deposited onto an anode and the movement of electrons creates electricity. But the random deposition of lithium can deplete its supply, leading to reduced battery performance and durability.

To combat this issue, a research team partnered with POSCO N.EX.T Hub to develop an anode protection layer made of a functional binder called PVA-g-PAA. This layer allows for a more controlled process of "bottom electrodeposition," where lithium is deposited uniformly from the bottom of the anode surface. This prevents unnecessary lithium consumption and promotes stable electrodeposition and detachment of lithium ions.

Using a scanning electron microscope, the team confirmed the stable electrodeposition and detachment of lithium ions, even with thin layers of lithium as small as 10 micrometers. These all-solid-state batteries also showed consistent electrochemical performance over extended periods.

Professor Soojin Park, who led the research, is committed to further enhancing battery life and increasing energy density through their innovative electrodeposition strategy. This research has also paved the way for POSCO Holdings to move towards commercializing lithium metal anodes, a crucial component of next-generation secondary batteries.

This groundbreaking study, conducted by researchers from the Department of Chemistry at Pohang University of Science and Technology (POSTECH) and POSCO N.EX.T Hub, has greatly improved the feasibility of all-solid-state batteries and their potential to revolutionize the energy storage industry.

David Lamy
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