Preparation and Electrochemical Characterization of La and Al Co-doped NCM811 Cathode Materials,ACS Omega

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Preparation and Electrochemical Characterization of La and Al Co-doped NCM811 Cathode Materials
ACS Omega ( IF 3.7 ) Pub Date : 2021-06-15 , DOI: 10.1021/acsomega.1c01552
Mingyu Zhang ₁ , Chaoyong Wang ₁ , Junkai Zhang ₂ , Gang Li ₃ , Li Gu ₄

Affiliation

LiNi_0.8Co_0.1Mn_0.1O₂ (NCM811) became a research hot point because of its low cost, environmental friendliness, and excellent electrochemical performance. However, Li⁺/Ni²⁺ intermixing is an essential factor affecting its applicability. Doping could be an important method to improve the electrochemical performance of NCM811-based cathode materials. In this work, La and Al co-doped NCM811 was prepared by a solid-state method. Results from X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive spectroscopy (EDS) and electrochemical performance were discussed in depth. These showed that when La and Al doping concentrations were 1 and 0.5%, the samples showed the best performance. The as-improved performances were mainly attributed to the reduced Li⁺/Ni²⁺ intermixing, suppressed phase transition, and decreased potential polarization and impedance.

中文翻译：

La和Al共掺杂NCM811正极材料的制备及电化学表征

LiNi _0.8 Co _0.1 Mn _0.1 O ₂ (NCM811)以其低成本、环保和优异的电化学性能成为研究热点。然而，Li ⁺ /Ni ²⁺混合是影响其适用性的重要因素。掺杂可能是提高 NCM811 基正极材料电化学性能的重要方法。在这项工作中，通过固态方法制备了 La 和 Al 共掺杂 NCM811。深入讨论了 X 射线衍射 (XRD)、扫描电子显微镜 (SEM) 和能量色散光谱 (EDS) 的结果和电化学性能。这表明当 La 和 Al 掺杂浓度为 1% 和 0.5% 时，样品表现出最佳性能。改进后的性能主要归因于减少的 Li ⁺ /Ni ²⁺混合、抑制相变以及降低电位极化和阻抗。

更新日期：2021-06-29

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