What Is Electrolytic Cobalt? What Is The Current Electrolytic Cobalt Price?

The strongest cobalt alloys are typically high-temperature, wear-resistant alloys like Stellite alloys (e.g., Stellite 6, Stellite 21) and MP35N (a cobalt-nickel-chromium-molybdenum alloy). Stellite alloys, composed of cobalt (Co) as the base with chromium (Cr), tungsten (W), and molybdenum (Mo), exhibit exceptional hardness, corrosion resistance, and high-temperature strength (up to 800°C). They are widely used in cutting tools, turbine blades, and industrial components. MP35N, with ~35% Co, 35% Ni, 10% Cr, and 20% Mo, offers superior tensile strength (over 1,800 MPa) and fatigue resistance, making it ideal for aerospace and medical implants.

Cobalt is slightly less abundant in the Earth's crust than lithium. Cobalt reserves are estimated at ~25 million metric tons, while lithium reserves are ~21 million metric tons. However, lithium is more accessible in brine deposits (e.g., salt flats), whereas cobalt is primarily a byproduct of copper and nickel mining, limiting its direct extraction. Despite similar crustal abundances, cobalt's dependency on primary mining and geopolitical concentration (e.g., 70% from the DRC) makes it less available in supply chains compared to lithium.

A cobalt metal cathode refers to the positive electrode in lithium-ion batteries (LIBs) where cobalt-based compounds are used. The most common is lithium cobalt oxide (LiCoO₂), where cobalt (Co) serves as a critical component. During charging, lithium ions (Li⁺) intercalate into the cathode, and during discharge, they deintercalate, generating electrical current. Cobalt's high energy density and electrochemical stability make LiCoO₂ ideal for consumer electronics (e.g., smartphones, laptops), though it is being partially replaced by nickel-rich cathodes (e.g., NMC, NCA) for higher capacity in electric vehicles.

Electrolytic cobalt is a high-purity form of cobalt metal produced via electrolysis, a hydrometallurgical process. It involves dissolving cobalt ore (e.g., cobalt sulfate or chloride) in an aqueous solution, purifying it to remove impurities (e.g., iron, copper), and passing an electric current through the solution. Cobalt ions (Co²⁺) are reduced at the cathode (negative electrode), depositing as solid cobalt metal. This method yields cobalt with >99.8% purity, used in electronics (e.g., magnetic alloys), catalysts, and as a feedstock for superalloys or battery materials.