SMM March 11 News:
Against the backdrop of a global push for sustainable energy solutions, innovations in battery technology have become a critical focus. Sodium-ion batteries, with their unique advantages, are gradually emerging and demonstrating significant development potential. Currently, based on cathode material classification, there are three main development routes: layered oxide, polyanion, and Prussian blue. Today, we introduce one of the polyanion routes—sodium vanadium phosphate (NVP).
The chemical formula of sodium vanadium phosphate is NaxV2(PO4)3. It features a unique crystal structure that provides efficient channels for sodium-ion transport during charge and discharge processes, ensuring good stability under high C-rate charge and discharge conditions.
Sodium vanadium phosphate surpasses other sodium-ion polyanion battery cells in energy density and is safer than LFP.
The voltage platform of sodium vanadium phosphate can reach up to 3.7 volts, with an average voltage platform of 3.5 volts, higher than NFPP. Its theoretical energy density can reach 160Wh/kg, and sodium vanadium phosphate battery cells are safer compared to lithium batteries.
Excellent Cycle Stability
In terms of cycle stability, sodium vanadium phosphate battery cells can cycle 4,000-5,000 times and operate stably under extremely high C-rates. Lead-acid batteries typically have a cycle life of 300-500 cycles, far lower than sodium vanadium phosphate battery cells. The cycle life of sodium vanadium phosphate battery cells is comparable to or even better than lithium batteries in some tests, meaning that devices using sodium vanadium phosphate battery cells require less frequent battery replacements over their life cycle, thereby reducing maintenance costs.
Outstanding High and Low-Temperature Performance, Superior to Most Batteries
The normal operating temperature range of sodium vanadium phosphate battery cells is -40°C to 80°C. At -20°C, the capacity retention rate of sodium-ion batteries reaches 90%. While LFP batteries perform well at room temperature, they experience capacity decay and deteriorated charge-discharge performance at low temperatures, with capacity retention rates typically ranging from 60% to 80% at -20°C. In contrast, sodium vanadium phosphate battery cells exhibit stronger adaptability to high and low-temperature environments, enabling stable operation under harsher temperature conditions.
With its excellent performance, sodium vanadium phosphate is gradually gaining public attention. However, constrained by capacity and cost issues, it is currently used only in niche markets. Its advantages, such as good C-rate performance and high structural stability, offer significant potential in specific market segments. To help upstream and downstream enterprises in the sodium-ion battery industry chain better understand the market trends of sodium vanadium phosphate battery cells (NVP), SMM, after a period of market survey, will add the price of "18650 cylindrical sodium-ion battery cells (NVP)" starting March 12, 2025. We hope for your attention upon its official launch.
SMM New Energy Research Team
Cong Wang 021-51666838
Rui Ma 021-51595780
Disheng Feng 021-51666714
Yanlin Lü 021-20707875
Yujun Liu 021-20707895
