Using traditional co-precipitation method accompanied by the subsequent calcination treatment, spherical pristine LiNi_0.6Co_0.2Mn_0.2O₂ (P-LNCM), and LiNi_0.6Co_0.2Mn_0.2O₂ co-doped with Zr and Er (EZ-LNCM) cathode materials are successfully synthesized. Powder X-ray diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), and X-ray photoelectron spectrometry (XPS) reveal that EZ-LNCM material exhibits some better potential crystal structural feature than P-LNCM material, mainly including the decreased Li⁺/Ni²⁺ disorder, the enlarged migration tunnel of Li⁺, the reduced content of Ni²⁺ in the surface and lower residual impurities. Within the voltage range of 2.8–4.5 V, the initial discharge capacity of EZ-LNCM at 0.1C is 208 mAh g⁻¹, and the cycle retention at 1C after 200 cycles for EZ-LNCM electrodes maintains 90.03%, which are higher than those of P-LNCM. Results based on cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) measurements, morphology and structure of cathode material reveal that co-doping can alleviate irreversible phase transformation and stabilize structural integrity, which benefits rapid speed for Li⁺ transfer and reduces impedance rise for the better electrochemical properties of EZ-LNCM.

使用传统的共沉淀方法伴随后续的煅烧处理，球形原始 LiNi _0.6 Co _0.2 Mn _0.2 O ₂ (P-LNCM) 和 LiNi _0.6 Co _0.2 Mn _0.2 O ₂共掺杂 Zr 和 Er (EZ-LNCM)成功合成了正极材料。粉末 X 射线衍射 (XRD)、扫描电子显微镜 (SEM)、高分辨率透射电子显微镜 (HRTEM) 和 X 射线光电子能谱 (XPS) 表明 EZ-LNCM 材料表现出比 P 更好的潜在晶体结构特征-LNCM材料，主要包括减少的Li ⁺ /Ni ²⁺无序，Li ⁺迁移隧道扩大，表面Ni ²⁺含量降低，残留杂质降低。在2.8-4.5 V电压范围内，EZ-LNCM在0.1C的初始放电容量为208 mAh g ^-1，EZ-LNCM电极在200次循环后1C的循环保持率保持在90.03%，高于P-LNCM 的那些。基于循环伏安法 (CV)、电化学阻抗谱 (EIS) 测量、正极材料的形貌和结构的结果表明，共掺杂可以减轻不可逆相变并稳定结构完整性，这有利于 Li ⁺快速转移并降低阻抗上升EZ-LNCM 具有更好的电化学性能。