Layered LiNi_0.6Co_0.2Mn_0.2O₂ (NCM 622) cathode materials were synthesized through spray-drying method with different pressure treatments (0, 2, 3, 4 ​MPa). The results of XRD and XPS showed that the LiNi_0.6Co_0.2Mn_0.2O₂ with 3 ​MPa treated presented lower level of cation mixing. And it also led to the increase of lithium interlayer spacing and the decrease of transition metal interlayer slab. It exhibited high specific capacity of 168 ​mA ​h g^-1 at 0.5 ​C and 130 ​mA ​h g^-1 at 10 ​C. After 150 cycles at 10 ​C, the retention also maintained above 85.1%. The sample treated with 3 ​MPa possessed superior lithium-ion diffusion ability and lithium ion diffusion coefficient were nearly three times than that of the untreated sample. The results illustrated that pressure-treatment was a practical approach for LiNi_0.6Co_0.2Mn_0.2O₂ cathodes to improve the electrochemical performance.

通过不同压力处理（0、2、3、4 MPa）的喷雾干燥法合成了层状LiNi _0.6 Co _0.2 Mn _0.2 O ₂（NCM 622）正极材料。XRD和XPS的结果表明，经3 MPa处理的LiNi _0.6 Co _0.2 Mn _0.2 O ₂具有较低的阳离子混合水平。这也导致锂中间层间距的增加和过渡金属中间层板的减少。它表现出168毫安汞柱的高比容量^-1以0.5C和130毫安汞柱^-1在10摄氏度 在10°C下进行150次循环后，保留率也保持在85.1％以上。经3 MPa处理的样品具有优异的锂离子扩散能力，锂离子扩散系数几乎是未处理样品的三倍。结果表明，加压处理是改善LiNi _0.6 Co _0.2 Mn _0.2 O ₂阴极电化学性能的一种实用方法。