Improving the cycling performance of LiNi0.8Co0.1Mn0.1O2 by surface coating with Li2TiO3
Improving the cycling performance of LiNi0.8Co0.1Mn0.1O2 by surface coating with Li2TiO3
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DOI：
10.1016/j.electacta.2016.06.110
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发表时间：
2016-09-01
影响因子：
6.6
通讯作者：
Wang, Ding
中科院分区：
文献类型：
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作者：
Meng, Kui;Wang, Zhixing;Wang, Ding
Li2TiO3薄膜涂层有效增强了LiNi0.8Co0.1Mn0.1O2的循环性能。通过 XRD、HRTEM、FFT 和 XPS 证明了平均厚度为 1 nm 的 Li2TiO3 涂层。与裸材料80.5%的容量保持率相比，改性LiNi0.8Co0.1Mn0.1O2材料在1C倍率下循环170次后表现出98%的容量保持率。 LiNi0.8Co0.1Mn0.1O2循环性能提高的原因在于Li2TiO3表面层抑制了活性材料与电解质之间的直接接触，增强了电极/电解质界面之间的锂离子扩散，并防止了活性材料在重复充放电过程中的粉化。 (C) 2016 Elsevier Ltd. 保留所有权利。
The cycling performance of LiNi0.8Co0.1Mn0.1O2 has been effectively enhanced by Li2TiO3 thin film coating. The Li2TiO3 coating layer with an average thickness of 1 nm has been proved by XRD, HRTEM, FFT and XPS. Compared with the 80.5% capacity retention of bare materials, the modified LiNi0.8Co0.1Mn0.1O2 materials Exhibit 98% capacity retention after 170 cycles at 1C rate. The reason for the improved cycling performance of LiNi0.8Co0.1Mn0.1O2 is due to the surface layer of Li2TiO3, which suppresses the direct contact between the active materials and the electrolytes, enhances the lithium ion diffusion between the electrode/electrolyte interface, and prevents the pulverization of the active materials during repeated charging/discharging. (C) 2016 Elsevier Ltd. All rights reserved.