world First Negative-Free Sodium Solid-State Battery Successfully Unveiled: 8 Years of Development and Over 100 Failed Experiments
August 16th News: Meng Ying and her team have successfully developed the world's first negative-free sodium solid-state battery after 8 years and over 100 failed experiments.
Project Background
While sodium batteries, solid-state batteries, and negative-free batteries have each been developed individually, no one had previously succeeded in combining these three concepts.
This new battery features a stable structure, high safety, and can be cycled hundreds of times. It also offers environmental benefits and low cost, paving the way for the future development of battery technology.
Meng Ying has been focused on materials science research for 26 years, during which she has published over 300 scientific papers and holds more than 10 patents.
Research Achievements
To create a solid-state battery with a complete interface connection between the electrolyte and the current collector, the research team developed a current collector that envelops the electrolyte after experiencing over 100 failed experiments.
Schematic Diagram of Negative-Free Battery and Energy Density Calculation
The team used solid aluminum powder with a liquid-like flow characteristic to replace traditional metal aluminum foil in constructing the current collector. During the battery assembly process, when the aluminum powder deposits and covers the electrolyte, it densifies under high pressure, forming a solid current collector that maintains liquid-like intimate contact with the electrolyte.
Additionally, the research team discovered a solid electrolyte with stable electrochemical performance—sodium borohydride (NaBH4). This electrolyte achieves nearly perfect contact with the particulate aluminum current collector. This was one of the key factors that enabled the successful development of the negative-free sodium solid-state battery.
Reference Address
Design principles for enabling an anode-free sodium all-solid-state battery
Next：Cornex Unveils Xinjiang’s First 5MWh Liquid-Cooled Energy Storage Cabin
Previous：The 4680 Battery: Technical Specifications Comparison with Traditional Batteries, Market Trends, and Future Potential
