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Macsen Energy says a sodium-ion cell using its Prussian white cathode exceeded 1,500 charge-discharge cycles in laboratory testing. The company reports 90% capacity retention after 1,000 cycles, but has not disclosed independent verification. It plans a cathode-material facility and pilot line, with construction scheduled to begin in 2027.
India-based Macsen Energy says a sodium-ion battery cell using its proprietary Prussian white cathode exceeded 1,500 charge-discharge cycles in laboratory testing, while retaining 90% of its initial capacity after 1,000 cycles. The company has not disclosed whether an independent third party verified the results. It plans to begin construction in 2027 on a cathode-material facility and cell pilot line.
The reported result concerns an actual sodium-ion cell tested in Macsen Energy’s battery research laboratory, according to the company. CEO Achal Agrawal said the cell crossed 1,500 cycles with sustained capacity and high coulombic efficiency. The company did not provide a full test protocol in the source report, including the cell format, charge and discharge rates, temperature, or the capacity remaining at the 1,500-cycle point.
Macsen reports that its material has a specific capacity above 150 mAh/g, coulombic efficiency of about 99.9%, and at least 90% capacity retention after 1,000 cycles. These are company-reported figures. The available report does not state whether the figures were measured by an independent laboratory, nor does it provide comparative test data against other cathode materials under the same conditions.
The company says it has set aside 10,000 square metres for a facility intended to scale up Prussian blue analogue cathode production to tonne-scale capacity. Plans also include a sodium-ion battery pilot line for electrode preparation, cell assembly, validation, and testing under near-commercial manufacturing conditions. Macsen has not named the site or disclosed the planned production capacity, investment, or timetable beyond a start to construction in 2027.
From Lab Results to Cell Production
Cycle life measures how often a battery can be charged and discharged before its capacity declines. Macsen’s reported figures have not been independently verified, and the company has not disclosed the test conditions in detail. It has not reported a commercial deployment or customer qualification.
The planned pilot line is intended for repeated cell production, validation, and testing under near-commercial manufacturing conditions. Macsen has not said when it expects pilot operations to begin or what output it will target.
The proposed cathode-material facility could add domestic production capacity for battery inputs in India. Its scale and timing remain plans. The company has not provided information establishing how the facility could affect supply, cost, or commercial adoption.
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Macsen’s Prussian White Approach
Prussian white is a sodium-rich, iron-based cathode material. Its open crystal structure can allow sodium ions to move in and out during charging and discharging. The source report describes potential advantages including relatively abundant raw materials, fast charging, and long cycle life; these are material-level prospects, not demonstrated outcomes for every cell or application.
Macsen says its main cell-development approach pairs a Prussian white cathode with a hard carbon anode. Its website also lists research into alternative anodes and anode-free configurations. The company gives an operating voltage range of 2.2 V to 4.0 V and an average discharge voltage of approximately 2.5 V to 3.6 V for its cathode material.
The company says its process addresses moisture sensitivity, oxygen exposure, and scalability, and produces a highly crystalline, fully sodiated material with low water content and improved air stability. Agrawal has described the work as spanning synthesis, material characterization, cell fabrication, and testing. Macsen has also started research and development into hard carbon synthesis for its full-cell technology.
““Crossing 1,500 cycles with sustained capacity and high coulombic efficiency, and retaining 90% of the cell’s initial capacity at 1,000 cycles, is an important result for our team.””
— Achal Agrawal, CEO of Macsen Group
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Verification and Scale Remain Open
The source report says Macsen did not disclose whether the cycle results were independently verified. It also does not include the test protocol or detailed capacity data at 1,500 cycles. Without those details, readers cannot assess how the reported result compares with other cells or how it might translate to a specific use.
The company has not disclosed the proposed facility’s location, investment, expected output, or customers. Its 2027 construction start is a stated plan, not evidence that the facility is already being built. It is also unclear when the pilot line will become operational and when results from production-scale or near-commercial testing might be available.
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Construction and Pilot-Line Milestones
Macsen says construction of the cathode-material facility and battery pilot line is scheduled to begin in 2027. The company has not disclosed the site, construction schedule, planned capacity, or expected start of pilot operations.
Further cell data could clarify the reported cycle-life performance, including the full testing conditions and results beyond 1,000 cycles. Independent testing or disclosures from pilot production could provide information about repeatability and manufacturing performance. The company has not announced a date for additional data, commercial production, or customer use.
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Key Questions
What did Macsen Energy report?
The company says a sodium-ion cell with its Prussian white cathode exceeded 1,500 charge-discharge cycles in laboratory testing. It also reports 90% capacity retention after 1,000 cycles.
Were the results independently verified?
The source report says Macsen did not disclose whether a third party verified the results. The test protocol and detailed data were also not provided there.
What is Prussian white?
It is a sodium-rich, iron-based cathode material used in sodium-ion batteries. Its crystal structure allows sodium ions to move during charging and discharging.
What is Macsen planning to build?
The company plans a facility to scale up cathode-material production and a sodium-ion cell pilot line. It says construction is scheduled to begin in 2027, but has not disclosed the location or planned capacity.
Source: rss
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