| New insights into improving electrochemical performances of LiNi0.5Mn0.5O2 cathode material by Li2ZrO3 coating and Zr4+ doping | |
Shangguan, Xuehui; Wang, Qinglei; Yang, Guowei; Jia, Guofeng ; Li, Faqiang
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| 2019-10 | |
| 发表期刊 | IONICS
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| ISSN | 0947-7047 |
| 卷号 | 25期号:10页码:4547-4556 |
| 摘要 | The poor electrochemical performances of LiNi0.5Mn0.5O2 prevent its wide adhibition. Herein, the synergistic effects of Li2ZrO3 coating and Zr4+ doping were used to enhance the electrochemical performances of LiNi0.5Mn0.5O2. Li2ZrO3 was evenly coated on the surface of LiNi0.5Mn0.5O2 successfully by a syn-lithiation strategy and small partial of Zr4+ was doped into the LiNi0.5Mn0.5O2. The results of the structure measurements indicated that Zr4+ doping cannot only lower the degree of Li/Ni cation maxing, but also improve the stability of the structure. The outcome of scanning electron microscope (SEM) suggests that the thin coating layer of Li2ZrO3 can reduce agglomeration. Moreover, X-ray photoelectron spectroscopy (XPS) indicated that Li2ZrO3 coating layer can reduce the side reaction in the interface between the cathode and the electrolyte. Therefore, the capacity retention of the 3 mol% Li2ZrO3@LiNi0.5Mn0.5O2 (@ stands for was coated on the surface of) electrode is 22% higher than that of the pristine electrode (100.41% vs.78.22%). After mechanism analysis, we found the synergistic effects of Zr-doping and Li2ZrO3 coating can effectively lower the degree of Li/Ni cation mixing, stop polarization, retard voltage degradation, and decrease resistances. |
| DOI | 10.1007/s11581-019-03015-3 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.isl.ac.cn/handle/363002/34113 |
| 专题 | 盐湖资源与化学实验室 中国科学院青海盐湖研究所 |
| 推荐引用方式 GB/T 7714 | Shangguan, Xuehui,Wang, Qinglei,Yang, Guowei,et al. New insights into improving electrochemical performances of LiNi0.5Mn0.5O2 cathode material by Li2ZrO3 coating and Zr4+ doping[J]. IONICS,2019,25(10):4547-4556. |
| APA | Shangguan, Xuehui,Wang, Qinglei,Yang, Guowei,Jia, Guofeng,&Li, Faqiang.(2019).New insights into improving electrochemical performances of LiNi0.5Mn0.5O2 cathode material by Li2ZrO3 coating and Zr4+ doping.IONICS,25(10),4547-4556. |
| MLA | Shangguan, Xuehui,et al."New insights into improving electrochemical performances of LiNi0.5Mn0.5O2 cathode material by Li2ZrO3 coating and Zr4+ doping".IONICS 25.10(2019):4547-4556. |
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