Ni-rich cathode materials with concentration gradients for high-energy and safe lithium-ion batteries: A comprehensive review | 2025 Tyyppi A2 Review article, literature review, systematic review Tekijä(t) Yerkinbekova Yerkezhan, Kumarov Alisher, Tatykayev Batukhan, Mentbayeva Almagul, Repo Eveliina, Laakso Ekaterina Muu painopiste LUT School of Engineering Sciences