Na_xMnO₂ shows Mn³⁺ and Mn⁴⁺ charge separation with the charge stripe ordering upon Na deintercalation at x = 5/8. In this paper it is shown that, surprisingly, at lower Na compositions of 5/8 > x ≥ 1/18 the phase evolution pathway of Na_xMnO₂ upon Na deintercalation shows a unique phenomenon of super charge separation, where the Mn³⁺ and Mn⁴⁺ ions fully charge‐separate into charge superplanes formed by succession of charge stripes in the third dimension. The Mn³⁺ superplanes attract Na ions electronically, and dominate the antiferromagnetic interactions in NaMnO₂. Na ions in Mn³⁺ superplanes also naturally pillar the MnO₂ layers to form the unusual O1 phases with large interlayer distances at x < 1/3, which dominates the unique electrochemical behavior of NaMnO₂.

中文翻译：

---

NaxMnO2中的超级电荷分离和高压相

Na _x MnO ₂显示Mn ³⁺和Mn ^4+的电荷分离，且在x = 5/8时，Na脱嵌后，电荷条带有序。在本文中，示出的是，令人惊奇地，在5/8>下的Na组合物X ≥1/18 Na组成的相位演化途径_X的MnO ₂时的Na脱嵌节目超级电荷分离的一种独特的现象，其中所述的Mn ³⁺ Mn ⁴⁺和Mn ⁴⁺离子完全电荷分离成由三维中连续的电荷条带形成的电荷超平面。Mn ³⁺超平面以电子方式吸引Na离子，并主导NaMnO _2中的反铁磁相互作用。Mn ³⁺超平面中的Na离子也自然地在MnO ₂层上形成了不寻常的O1相，并在x <1/3处形成了较大的层间距离，这主导了NaMnO ₂的独特电化学行为。