Selective electrodeposition of high-purity nickel from nickel-cobalt mixed aqueous solutions using general-purpose electrodes, without solvent extraction
Nickel and cobalt demand is surging for lithium-ion battery cathode materials, driving the need for efficient separation and refining technologies. Due to their similar metallic and ionic properties, making separation challenging, the current mainstream approach relies on solvent extraction exploiting differences in complex formation behavior. However, this method involves multiple steps, uses environmentally burdensome organic solvents, and requires additional refining, such as electrowinning, to isolate the metals in pure form. This invention provides a low-cost, low‑environmental‑impact method for selectively electrowinning nickel from nickel–cobalt mixed aqueous solutions, characterized by a simple electrolytic process using general‑purpose electrodes. In the examples, electrodeposited nickel with a purity of over 99.4% was obtained.
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The revenue generated from technology transfer is reinvested into universities and researchers as new research funding, which is used to create further research outcomes. To ensure the smooth operation of this cycle, known as the "Intellectual Creation Cycle," we will actively promote technology transfer. The types of seeds we handle include patents, know-how, databases, and programs. We have established a collaborative framework by concluding basic technology transfer agreements with the following universities (as of April 1, 2026): - Tohoku University - Hirosaki University - Iwate University - Akita University - Fukushima University - Yamagata University - Tohoku Gakuin University - Iwate Medical University - Fukushima Medical University - Aizu University - Miyagi University - Hokkaido University - Muroran Institute of Technology - Showa Medical University - Asahikawa Medical University
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