Macsen Energy reports that its sodium-ion cell has crossed 1,500 charge-discharge cycles, with 90% capacity retention measured at 1,000 cycles
The company has developed a single-step, single-vessel process for producing Prussian White cathode material and filed a related patent application
It plans pilot-scale cathode and cell manufacturing during 2026-2027, with stationary and grid-scale storage among its intended applications
Indian battery materials and cell technology developer Macsen Energy has reported more than 1,500 charge-discharge cycles for a sodium-ion cell using its proprietary Prussian White cathode material. According to the company, the cell retained 90% of its initial capacity at 1,000 cycles in laboratory testing.
Prussian White is a sodium-rich cathode material in the Prussian Blue Analog (PBA) family. Sodium ions leave its open crystal structure during charging and return during discharge.
Macsen says production could use existing chemical plants and commercially available raw materials. The challenge is making the material consistently suitable for batteries. Sodium and water content must be controlled, along with its composition and crystal structure.
To address these challenges, Macsen has developed a proprietary single-step synthesis process carried out in one vessel under an inert atmosphere. In its concept paper, the company says this approach is intended to reduce intermediate handling and oxygen exposure. It has filed a patent application for the method.
“Prussian White may appear straightforward to synthesize, but producing a material that approaches its theoretical capacity and maintains strong electrochemical performance over repeated charge-discharge cycles is a much more demanding task,” said Macsen Group CEO Achal Agrawal.
The result follows 3 years of research into material synthesis, refinement, and electrochemical testing. Macsen says the findings support its development of sodium-ion technology for energy storage applications requiring long operating life.
The company is continuing work on cathode and anode materials, coin-cell and pouch-cell testing, and sodium-ion full cells. It has allocated 10,000 m² of land for a proposed PBA cathode-material scale-up facility and sodium-ion cell fabrication pilot line.
Its concept paper outlines plans to establish pilot-scale manufacturing during 2026-2027 and increase cathode-material production to tonne-scale quantities. The company sees potential for this technology in stationary and grid-scale storage, residential solar systems, and grid-connected or off-grid renewable energy projects.
Macsen Energy grew out of battery research at Macsen Labs Group, which manufactures specialty chemicals and pharmaceutical ingredients. The team’s work on Prussian Blue for pharmaceutical use led it to investigate Prussian White as a sodium-ion battery cathode material.
