0.8 mm EMM Flakes in 10x10 mm Size for Alkaline Battery Cells
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What EMM Flakes Are
Electrolytic manganese metal is produced by electrolysis of a manganese sulphate solution, depositing pure manganese on a cathode. The deposit is stripped and processed into flakes, which are graded by thickness, size and chemical purity.
Battery grades typically run at 99.7% manganese or higher, with tight limits on iron, selenium and other elements that would disturb cell chemistry.
Why 0.8 mm Thickness and 10x10 mm Size
The 0.8 millimetre thickness gives a flake that is strong enough to handle but thin enough to dissolve at a controlled rate. A nominal 10 by 10 millimetre flake feeds well and packs consistently, which helps keep dosing uniform across a production run.
Physical consistency is as important as chemistry in battery plants, because an uneven feed shows up as variation in the finished cell.
Role in Alkaline Battery Cells
In alkaline cells, manganese is a key component of the cathode chemistry. High-purity EMM flakes ensure that the active material is not contaminated by elements that would reduce capacity or increase self-discharge.
Other uses include manganese-hydrogen storage systems and specialty chemical routes where clean manganese is required.
Grade and Purity Control
Manganese content: typically 99.7% minimum for battery grades.
Iron: kept low to avoid interference with cell reactions.
Selenium: strictly limited in battery specifications.
Thickness and size: controlled to keep feeding and dissolution uniform.
Ordering and Verification
Specify the manganese content, the thickness, the flake size distribution and the packaging at the time of order. Ask for a certificate of analysis with each lot and, for battery use, confirm that the trace element limits meet the cell maker's specification.
Because the material is reactive with moisture over long storage, keep it dry and sealed until it is charged to the process.
Frequently Asked Questions
Q: What does EMM stand for?
Electrolytic manganese metal, the high-purity manganese made by electrolytic deposition.
Q: Why specify a 0.8 mm flake thickness?
It balances handling strength with a controlled dissolution rate, which keeps dosing and cell chemistry consistent.
Q: What purity is needed for batteries?
Battery grades are generally 99.7% manganese or higher, with tight limits on iron and selenium.
Q: What is the 10x10 mm size for?
It gives a uniform flake that feeds and packs reliably in battery production equipment.
Q: How should the flakes be stored?
Dry and sealed, because the material reacts with moisture over long storage.
