New Safer Battery Lasts Eight Times Longer Than Standard Models, Scientists Claim

A Breakthrough in Solid Polymer Electrolyte Stability

According to НВ — Техно: By incorporating graphite carbon nitride (GCN), researchers have developed a stable solid polymer electrolyte for sodium-ion batteries that tackles dendrite formation and boosts safety. This novel method significantly enhances ion movement while preventing the buildup of metallic deposits, a common cause of short circuits and battery fires.

Why Sodium-Ion Systems Are Gaining Attention

Sodium-ion batteries using this electrolyte are far more cost-effective than lithium-based alternatives. The electrolyte was created by heating urea to 550 °C to produce GCN, then mixing ultra-thin GCN sheets with a polymer film. This process tripled the polymer's mechanical strength. Ionic conductivity saw a major improvement at 55 °C, and nitrogen-rich areas on the additive's surface help release sodium ions.

• While a standard polymer electrolyte failed after 250 hours, the modified version operated reliably for over 2,000 hours.
• Test battery cells retained 95% of their capacity after 500 charge-discharge cycles.
• A flexible prototype continued powering an LED even after being folded and cut.

The NUS team is now adapting the batteries for room-temperature operation. Findings were published in the journal Advanced Functional Materials.

This advancement in sodium-ion battery technology holds great promise for cutting the costs of energy storage solutions, as sodium is far more abundant than lithium.

Improvements in safety and lifespan could also drive wider adoption of sodium-ion technology in consumer electronics and energy systems, reducing reliance on lithium batteries and their environmental footprint. The study marks important progress toward commercializing new battery technologies that may reshape the market for high-energy devices.

As researchers continue to innovate in battery technology, another study highlights how scientists in Japan are transforming detrimental reactions into beneficial mechanisms within batteries. This approach not only addresses existing flaws but also enhances performance and safety. To explore this fascinating development further, read about how Japanese scientists are turning battery challenges into advantages.