This No-manganese high-nickel Ni90 precursor is developed for the synthesis of advanced lithium-ion battery cathode materials, specifically targeting high-energy-density applications. The product, composed of Ni₀.₉₀Co₀.₁₀(OH)₂ in a single-crystal structure, offers a high nickel content (90%) without manganese, which can help simplify material composition while maintaining structural stability. As a precursor, it does not contain lithium ions and exhibits no intrinsic electrochemical activity; its performance is dependent on subsequent lithium salt addition and sintering processes. Designed for use in tube furnaces under an oxygen atmosphere at 900°C for 10 hours (these conditions serve as a reference), this material is well-suited for researchers developing next-generation cathode materials with enhanced capacity and cycling stability. Available in various quantities from 20g to 1000g, it supports both small-scale laboratory studies and larger experimental batches in energy materials research.