Review-recent advances and remaining challenges for lithium ion battery cathodes. Understanding electrochemical potentials of cathode materials in rechargeable batteries. Unlocking the potential of cation-disordered oxides for rechargeable lithium batteries. Enabling high areal capacity for Co-free high voltage spinel materials in next-generation Li-ion batteries. Correlation between manganese dissolution and dynamic phase stability in spinel-based lithium-ion battery. Evolution of redox couples in Li- and Mn-rich cathode materials and mitigation of voltage fade by reducing oxygen release. Single-particle measurements of electrochemical kinetics in NMC and NCA cathodes for Li-ion batteries. Trace doping of multiple elements enables stable battery cycling of LiCoO 2 at 4.6 V. Nanoscale lithium quantification in Li xNi 圜o wMn zO 2 as cathode for rechargeable batteries. Lithium-ion battery supply chain considerations: analysis of potential bottlenecks in critical metals. Is cobalt needed in Ni-rich positive electrode materials for lithium ion batteries? J. Ni-rich/Co-poor layered cathode for automotive Li-ion batteries: promises and challenges. With these fundamental discoveries, we demonstrated a series of LiNi αMn βX γO 2 (X = single or multiple dopants) as a promising candidate for Co-free cathodes. Moreover, Mn substitution effectively alleviates the destructive effects of Co and enables a high potential functionality. Our results affirmed that Co plays an undeniable role in fast capacity and/or structural degradation, and found that Co is more destructive than Ni at high potentials, which offers unexpected but encouraging perspectives for Co reduction. Here we investigate the roles of Co in purposely designed systems that include both Co-rich and Mn-substituted Co-free cathodes. ![]() However, complete Co elimination is prevented by the lack of fundamental understanding of the impact of Co on cathode capacity and structural stability, as well as the lack of effective substitute components in practice. ![]() Current bottlenecks in cobalt (Co) supply have negatively impacted commercial battery production and inspired the development of cathode materials that are less reliant on Co.
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