Abstract

In this paper, the dual-modified LiNi_0.8Co_0.1Mn_0.1O₂ via Gd₂O₃ is successfully obtained by the solid-state method. The phenomenon of Li/Ni cation mixing and structural stability of materials has been improved after Gd₂O₃ modification. Additionally, the lower average discharge voltage drop (ΔE_d) and electrochemical polarization of the batteries are obtained after modification. Simultaneously, the dual-modified material via Gd₂O₃ exhibits the high capacity retention of 94.50% compared with that (83.40%) of the Pristine (3.0–4.4 V, 1 C (180 mA g⁻¹), 25 °C, after 100 cycles). The excellent electrochemical properties ascribe to the higher bond dissociation energies of Gd-O (716 kJ mol⁻¹) and the stable coating layer of Gd₂O₃.

中文翻译：

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固态法对LiNi 0.8 Co 0.1 Mn 0.1 O 2正极材料的Gd 2 O 3进行双重修饰

摘要

本文通过固相法成功地获得了通过Gd ₂ O ₃改性的LiNi _0.8 Co _0.1 Mn _0.1 O ₂。Gd ₂ O ₃改性后，改善了Li / Ni阳离子混合现象和材料的结构稳定性。此外，较低的平均放电电压降（Δ Ë _d修改之后获得的电池的）和电化学极化。同时，与原始（3.0-4.4 V，1 C（180 mA g）相比，通过Gd ₂ O ₃进行的双重改性材料具有94.50％的高容量保持率^-1），25°C，100个循环后）。优异的电化学性能归因于Gd-O的键解离能更高（716 kJ mol ^-1）和Gd ₂ O ₃的稳定涂层。