Researchers have developed a new nano-space confinement strategy for hard carbon anodes in sodium-ion batteries. By optimizing the design of closed pores, the team achieved a high reversible capacity of 500 mAh g-1 and significantly improved charging rates, reducing the trade-off between energy density and power. This advancement helps sodium-ion batteries become a more viable, cost-effective alternative to lithium-ion systems. The new material shows strong stability over 1,000 cycles, making it a promising candidate for large-scale energy storage and electric vehicle applications.
