Scientists at the National University of Singapore have developed a new generation of safer and more durable sodium-ion batteries. To achieve this, they used an inexpensive additive based on graphitic carbon nitride derived from common urea. This development helps make solid-state batteries more stable, long-lasting, and fire-resistant. This is reported by Ixbt.com reports .
The main problem with modern sodium-ion batteries lay in their electrolytes. Although sodium is a cheaper and more accessible raw material than lithium, many batteries still use flammable liquid components. Solid-state versions suffer from low conductivity and unstable performance when in contact with metallic sodium.
Researchers from Singapore solved this problem by adding ultra-thin layers of graphitic carbon nitride to the polymer electrolyte. As a result, ions inside the battery began to move significantly faster, and the risk of forming metal dendrites—microscopic needles that cause short circuits and fires—was drastically reduced.
The new material improved electrolyte conductivity by more than double and dramatically increased the battery's service life. During tests, while a standard battery failed after approximately 250 hours, the improved version operated for over 2000 hours. Additionally, prototypes retained 95 percent of their capacity even after 500 charge cycles.
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