Here, we report for the first time a simple one-pot method for synthesizing layered sodium oxide Na_2/3Mn_0.67Ni_0.22Co_0.07O₂ (EW-NaMNC) by ethanol-assisted hydrothermal method. This novel synthetic method is a one-pot technology which does not involve mechanical mixing of Na source and precursor, it thus can prevent the loss of all elements and the material with good chemical homogeneity and well-ordered structure can be achieved. As cathode material for sodium-ion batteries, the as-synthesized EW-NaMNC exhibits a high reversible capacity of 104.1 mAh g⁻¹ at 0.5C after 100 cycles, excellent rate performance of 79.7 mAh g⁻¹ at 5C, and significantly enhanced cycling life of 56 mAh g⁻¹ at 10C after 880 cycles. This elegant, facile, and one-pot cathode synthesis approach with excellent electrochemical performance will result in technological advances of Na layered cathode material in Na-ion batteries.

在这里，我们首次报道了一种简单的一锅法，通过乙醇辅助水热法合成层状氧化钠Na _2/3 Mn _0.67 Ni _0.22 Co _0.07 O ₂（EW-NaMNC）。这种新颖的合成方法是一种一锅法，不涉及Na源和前驱体的机械混合，因此可以防止所有元素的流失，并且可以实现具有良好化学均质性和结构整齐的材料。合成的EW-NaMNC作为钠离子电池的正极材料，经过100次循环后，在0.5C时具有104.1 mAh g ^-1的高可逆容量，出色的倍率性能为79.7 mAh g ^-1在5C下进行880次循环后，在10C下显着提高了56 mAh g ^-1的循环寿命。这种具有优异电化学性能的优雅，便捷，一锅法的阴极合成方法将导致Na离子电池中Na层阴极材料的技术进步。