Mg-substituted Na3Ni2−xMgxSbO6 cathode materials are synthesized via a scalable high-temperature solid-state method to improve the cyclability of the honeycomb-layered oxide cathode in sodium-ion batteries. The partial substitution of Ni2+ by Mg2+ in the transition-metal layer suppresses the electrochemically unfavorable P3–O1 transition and enlarges the lattice parameters to bring improved performance with respect to capacity retention, Coulombic efficiency, and Na (de)intercalation kinetics.
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You et al. (2016) studied this question.
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