A perspective on the high-voltage LiMn1.5Ni0.5O4 spinel cathode for lithium-ion batteries

The LiMn1.5Ni0.5O4 spinel is an attractive cathode candidate for next generation lithium-ion batteries as it offers high power capability with an operating voltage of ∼4.7 V and a capacity of ∼135 mA h g−1. However, its commercialization is plagued by severe capacity fade, particularly at elevated temperatures, in full cells employing a graphite anode. This perspective article provides an overview of the recent developments on understanding various factors that influence the electrochemical performance of the high-voltage spinel cathodes. The factors include the degree of cation ordering, Mn3+ content, morphology, and surface planes/compositions in contact with the electrolyte, which are influenced by…