A CaFe₂O₄-type NaMn₂O₄ has been synthesized at a pressure of 4.5 Gpa, as the cathode of SIBs. It exhibits a smooth voltage profile, limited polarization and good capacity retention both at room temperature and at a higher temperature. The stable battery performance is due to the high barrier of structure rearrangement and suppressed Jahn–Teller distortions in this post-spinel structure.
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Liu et al. (2014) studied this question.
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