Innovation
This sodium-ion battery technology is based on the repurposing of industrial waste salts. The cathode material is produced from iron and sodium sources derived from industrial by-products, along with carbon materials. Utilizing these by-products not only lowers the production cost of the sodium-ion cathode materials but also eliminates the energy consumption and environmental costs associated with their disposal.
During charge and discharge cycles, Na⁺ extracted from the NFS cathode can intercalate into the lithium layers of the high-nickel material, expanding the interlayer spacing and forming a structural support framework. This significantly enhances Li⁺ de/intercalation efficiency and structural stability, endowing the battery with exceptional high-rate fast-charging capability and long cycle life. Concurrently, the smaller-radius Li⁺ can smoothly de/intercalate within the sodium iron sulfate crystal lattice, further improving its ionic diffusion capacity.
The well-matched working voltage of high-nickel materials and NFS materials enables their synergistic use. This allows the battery to maintain high voltage and high energy density while also achieving superior fast-charging performance, cycling stability, and low-temperature operational capability.
Addressing the inherent challenge of traditional lithium-ion batteries in balancing high safety with high energy density, this solution achieves a perfect unification of high energy density, ultra-fast charging, and ultimate safety. The substantial increase in energy density directly enables longer range and paves the way for product evolution toward thinner, lighter, and more flexible form factors.
