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IT Home reported on August 16 that ScienceNet published a blog post yesterday (August 15), reporting that Meng Ying led his team,After eight years and more than 100 failed experiments, they finally succeeded in developing the world’s first negative-electrode-free sodium solid-state battery.

Project Development Background

Sodium batteries, solid-state batteries, and anode-less batteries have all been proposed, but no one has been able to successfully combine all three ideas.

This new type of battery has a stable structure, high safety, can be recycled hundreds of times, and has the advantages of being environmentally friendly and low-cost, opening up a new path for the development of future battery technology.

About the Author

The full title of the paper is "Design principles for enabling an anode-free sodium all-solid-state battery". The authors are as follows:

• Corresponding author: Ying Shirley Meng, Professor of Molecular Engineering, Pritzker School of Molecular Engineering, University of Chicago

• Corresponding author: Jihyun Jang, Postdoctoral Fellow, University of California, San Diego (UCSD)

• First author: Grayson Deysher, PhD student at UCSD

Nature Energy paper

Meng Ying has been focusing on materials science research for 26 years, has published more than 300 scientific papers, and holds more than 10 patents.

Research Results

In order to create an all-solid-state battery with a complete interface connection between the electrolyte and the current collector, the research team developed a current collector that surrounds the electrolyte after more than 100 experimental failures.

Schematic diagram of no negative electrode and energy density calculation

The team used solid aluminum powder with liquid-like fluidity to replace traditional metal aluminum foil to construct the current collector. During the battery assembly process, when the aluminum powder is deposited and covers the electrolyte, it densifies under high pressure to form a solid current collector that can maintain liquid-like close contact with the electrolyte.

In addition, the research team discovered a solid electrolyte with stable electrochemical properties - sodium borohydride (NBH). It can achieve near-perfect contact with the granular aluminum current collector. This is also one of the keys to the research team's successful development of anode-free sodium solid-state batteries.

IT Home attaches the reference address