It is well known that reducing particle size and/or hollowing the particles improves the electrochemical performance, especially the rate capability, of cathode material in Li-ion batteries. However, there has been no report comparing each effect quantitatively. In this research, a series of LiNi_1/3Co_1/3Mn_1/3O₂ cathode materials with different particle sizes and with different amounts of hollowness was synthesized by controlling the mass-ratio between the low-density core and the high-density shell as well as the size of the core of the Ni_1/3Co_1/3Mn_1/3(OH)₂ precursors, then compared and evaluated quantitatively. Increasing the hollowness increased the electrochemical reaction area and reduced the Li-ion diffusion distance more than reducing particle size. Due to these effects on the particle morphology, increasing hollowness greatly improved the cycle durability as well as the rate capability, as compared to reducing particle size.

众所周知，减小颗粒尺寸和/或使颗粒中空可改善锂离子电池中阴极材料的电化学性能，特别是倍率性能。但是，尚无关于定量比较每种作用的报道。通过控制低密度核与高密度核之间的质量比，合成了一系列具有不同粒径和不同空心度的LiNi _1/3 Co _1/3 Mn _1/3 O ₂正极材料。密度壳以及Ni _1/3 Co _1/3 Mn _1/3（OH）₂的核尺寸前体，然后进行比较和定量评估。增加空心度增加了电化学反应面积，并且与减小粒径相比更多地减小了锂离子扩散距离。由于这些对颗粒形态的影响，与减小颗粒尺寸相比，增加空心度极大地改善了循环耐久性以及速率能力。