Dissolved transition metal ions can induce peak shifts in the NMR spectra of degraded battery electrolytes. Here, we exploit this staightforward, accessible method to calculate magnetic moments for dissolved Ni²⁺, Mn²⁺, Co²⁺, and Cu²⁺; subsequent analysis of dissolution from LiMn₂O₄, LiNiO₂, and LiNi_0.5Mn_1.5O₄ shows that the dissolved metals are exclusively divalent.

中文翻译：

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从溶液 NMR 光谱确定电池电解质中溶解的过渡金属的氧化态

溶解的过渡金属离子会导致退化电池电解质的 NMR 光谱发生峰移。在这里，我们利用这种简单易行的方法来计算溶解的 Ni ²⁺、Mn ²⁺、Co ²⁺和 Cu ²⁺的磁矩；随后对 LiMn ₂ O ₄、LiNiO ₂和 LiNi _0.5 Mn _1.5 O ₄的溶解分析表明溶解的金属完全是二价的。