en.Wedoany.com Reported - The team led by Fan Zhuangjun from the "Carbon Neutral Innovation Platform" of the Hydrogen and Ammonia Center at the Hefei Comprehensive National Science Center Energy Research Institute has developed a more durable, faster-charging, and structurally stable sodium-ion battery cathode material. The relevant findings, with the Energy Research Institute as the primary affiliation, were published in the energy field journal Energy Storage Materials.

Sodium-ion batteries, due to the abundance and low cost of sodium resources, hold application potential in large-scale energy storage. However, their cathode materials are prone to structural instability and capacity degradation under high-voltage conditions. The research team approached the issue from material structural design, achieving a more ordered arrangement of metal ions and reducing internal defects through molecular design. They introduced three elements—calcium, lithium, and copper—with calcium acting as a "support pillar" to maintain structure under high voltage, lithium as a "lubricant" to facilitate ion movement, and copper as a "reinforcing agent" to enhance stability.

Experimental results show that the cathode material remains stable at a high voltage of 4.3 V, retaining 85.2% of its capacity after 1,000 cycles under high-current fast-charging conditions. This study provides a new approach for designing sodium-ion battery cathode materials and offers insights for reducing costs, extending lifespan, and adapting sodium-ion batteries for large-scale energy storage applications.

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