Electrolytic Manganese Dioxide Production

MnSO4 + 2H2O → MnO2 + H2SO4 + H2

Overview

Electrolytic manganese dioxide (EMD) is produced by electrolyzing manganese sulfate solution in sulfuric acid at 90–98°C. MnO₂ deposits on the titanium anode as a dense, high-purity gamma-phase material with superior electrochemical activity compared to natural or chemical MnO₂. EMD is essential for high-performance alkaline and lithium batteries.

Participants

Role Substance Coefficient State
Reactant Water H₂O 2 (l)
Product Manganese Dioxide MnO₂ 1 (s)
Product Sulfuric Acid H₂SO₄ 1 (aq)

Everyday Example

The MnO₂ cathode in every Duracell or Energizer alkaline battery is electrolytic manganese dioxide made by this process.

Industrial Importance

EMD production exceeds 500,000 tonnes annually, driven by demand from the alkaline and lithium battery industries.

Properties

Type
Electrochemical
Reversible
No
Energy
Endothermic
ΔH
385.0 kJ/mol

Related Reactions

Alkaline Battery Discharge Anodizing of Aluminum Cathodic Protection (Zinc Sacrificial Anode) Chlor-Alkali Electrolysis Chrome Electroplating Copper Electroplating Daniell Cell (Zinc-Copper Galvanic Cell) Electrochemical CO₂ Reduction to CO Electrochemical Machining (ECM) Electrolysis of Molten NaCl (Downs Process)

Frequently Asked Questions

What is the equation for Electrolytic Manganese Dioxide Production?
The balanced equation is: MnSO₄ + 2H₂O → MnO₂ + H₂SO₄ + H₂.
What type of reaction is Electrolytic Manganese Dioxide Production?
Electrolytic Manganese Dioxide Production is a electrochemical reaction.
Is Electrolytic Manganese Dioxide Production exothermic or endothermic?
Electrolytic Manganese Dioxide Production is endothermic (absorbs energy). The enthalpy change (ΔH) is 385.0 kJ/mol.