Cornex Unveils 165Ah Sodium-Ion Prismatic Cells & Commences 588Ah LFP Mass Production

The global stationary energy storage landscape is undergoing a pivotal shift as sodium-ion technology emerges as a viable, cost-effective alternative to dominant lithium-ion solutions. Leading this transition, Chinese battery manufacturer Cornex New Energy has expanded its product portfolio with two new sodium-ion cells tailored exclusively for utility and commercial energy storage applications, alongside a major production milestone for its high-capacity lithium iron phosphate (LFP) lineup.

Flagship 165Ah Sodium-Ion Cell: Industry-Leading Cycle Life & Global Certifications

Cornex’s new sodium-ion series includes 165Ah and 58Ah prismatic cells, with the 165Ah PN173-165A serving as the flagship model. It features a polyanion-type sodium iron pyrophosphate (NFPP) cathode paired with a hard carbon anode, a chemistry optimized for long-duration stationary storage. The cell has already secured full global safety certifications including Chinese GB standards, UN38.3, UL, and IEC 62619, clearing the way for immediate worldwide deployment.

Engineered specifically for grid frequency regulation and long-duration storage, the 165Ah cell delivers a 1P energy efficiency of at least 94.5% and an exceptional cycle life exceeding 20,000 charge-discharge cycles. Physically, it measures 71.7×174.4×207.2mm and weighs 4.5kg, with a nominal gravimetric energy density of 102Wh/kg and volumetric energy density of 182Wh/L at 0.5P discharge rate.

While these density metrics lag behind lithium-ion alternatives—Cornex’s own 314Ah LFP cell weighs 24% more at 5.6kg but delivers 90% higher energy capacity—sodium-ion technology offers compelling offsetting advantages. These include reliance on globally abundant, low-cost raw materials, stable operation across extreme temperature ranges, and superior thermal safety with higher thermal runaway thresholds. Critically, sodium-ion cells can be safely transported at 0V state of charge, eliminating major logistics risks associated with large-scale lithium-ion battery shipments.

588Ah LFP Cell Enters Mass Production & New Cylindrical Lineup Launches

In parallel with its sodium-ion announcement, Cornex confirmed that its 588Ah LFP cell, first unveiled in September 2025, has officially transitioned to full mass production. This high-capacity model features an updated design architecture with industry-leading specifications: 190Wh/kg gravimetric energy density, 419Wh/L volumetric density, 96.5% round-trip efficiency, and a cycle life exceeding 12,000 cycles, making it ideal for utility-scale energy storage projects.

Cornex also expanded its mobility and portable power portfolio with four new cylindrical battery formats, available in 10Ah, 12.5Ah, 16Ah, and 26.5Ah capacities. Tailored for e-bikes, scooters, and power tools, these cells address key pain points in the low-power market, particularly severe range degradation and unreliable cold-weather performance. Unlike standard lithium-ion cells that require energy-consuming internal heating films to operate in freezing temperatures, Cornex’s new cylindrical cells deliver consistent performance without auxiliary heating, improving overall system efficiency.

Global Sodium-Ion Deployment Accelerates Across Sectors

Real-world adoption of sodium-ion technology is gaining rapid momentum worldwide. On the utility side, Peak Energy recently commissioned the largest grid-scale sodium-ion system in the United States, a 3.5MWh facility, while significantly larger installations are already operational across China. In the consumer portable power market, brands like Bluetti have integrated sodium-ion cells into products such as the Pioneer Na power station, catering to off-grid users requiring reliable performance in sub-zero climates. As sodium-ion technology continues to mature, it is poised to capture a growing share of the global stationary energy storage market, complementing lithium-ion solutions and driving further cost reductions across the industry.

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