| Effects of Li2TiO3 coating on the structure and the electrochemical properties of LiNi0.5Mn0.5O2 cathode materials at high voltages | |
Jia, Guofeng ; Liu, Suqin; Yang, Guowei; Li, Faqiang; Wu, Kang; He, Zhen; Shangguan, Xuehui
| |
| 2019-02 | |
| 发表期刊 | IONICS
 |
| ISSN | 0947-7047 |
| 卷号 | 25期号:2页码:399-410 |
| 摘要 | To improve the cycle performance, zLi(2)TiO(3)@LiNi0.5Mn0.5O2 (z=0, 1, 3 and 5mol%) (@ means was coated on the surface of) cathode materials have been successfully prepared via a syn-lithiation strategy. The high-resolution transmission electron microscope (HRTEM) structural analysis results show that Li2TiO3 is evenly coated on the surface of LiNi0.5Mn0.5O2, with the thickness of the coating layer of approximately 10nm. The electrochemical characterizations of the synthesized zLi(2)TiO(3)@LiNi0.5Mn0.5O2 suggest that 1mol% Li2TiO3@LiNi0.5Mn0.5O2 electrode shows the best electrochemical performance, including the highest capacity and best cycle stability and rate performance. The capacity retention at 25 degrees C is improved by approximately 23% by the 1mol% Li2TiO3 coating. The improved cycling performance of LiNi0.5Mn0.5O2 arises from the presence of the Li2TiO3 surface layer, which suppresses the direct contact between the active materials and the electrolytes, enhances the lithium ion diffusion through the electrode/electrolyte interface, expands the BET area, stabilizes the structure and prevents the pulverization of the active materials during repeated charging/discharging. The XPS results showed that Li2TiO3 coating layer could inhibit electrolyte decomposition, and the decomposition of electrolyte on the surface of coating electrode is different from that of LiNi0.5Mn0.5O2 electrode. |
| DOI | 10.1007/s11581-018-2832-8 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.isl.ac.cn/handle/363002/34088 |
| 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 | Jia, Guofeng,Liu, Suqin,Yang, Guowei,et al. Effects of Li2TiO3 coating on the structure and the electrochemical properties of LiNi0.5Mn0.5O2 cathode materials at high voltages[J]. IONICS,2019,25(2):399-410. |
| APA | Jia, Guofeng.,Liu, Suqin.,Yang, Guowei.,Li, Faqiang.,Wu, Kang.,...&Shangguan, Xuehui.(2019).Effects of Li2TiO3 coating on the structure and the electrochemical properties of LiNi0.5Mn0.5O2 cathode materials at high voltages.IONICS,25(2),399-410. |
| MLA | Jia, Guofeng,et al."Effects of Li2TiO3 coating on the structure and the electrochemical properties of LiNi0.5Mn0.5O2 cathode materials at high voltages".IONICS 25.2(2019):399-410. |
| 条目包含的文件 | ||||||
| 文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
| Effects of Li2TiO3 c（9376KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | 浏览 请求全文 | |
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。
修改评论