| Ultrathin CeO2 coating for improved cycling and rate performance of Ni-rich layered LiNi0.7Co0.2Mn0.1O2 cathode materials | |
Dong, Shengde; Zhou, Yuan ; Hai, Chunxi; Zeng, Jinbo; Sun, Yanxia; Shen, Yue; Li, Xiang; Ren, Xiufeng; Qi, Guicai; Zhang, Xinxing; Ma, Luxiang
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| 2019-01 | |
| 发表期刊 | CERAMICS INTERNATIONAL
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| ISSN | 0272-8842 |
| 卷号 | 45期号:1页码:144-152 |
| 摘要 | In this study, we have successfully coated the CeO2 nanoparticles (CeONPs) layer onto the surface of the Ni-rich layered LiNi0.7Co0.2Mn0.1O2 cathode materials by a wet chemical method, which can effectively improve the structural stability of electrode. The X-ray powder diffraction (XRD), transmission electron microscope (TEM), scanning electron microscope (SEM), and X-ray photoelectron spectroscopy (XPS) are used to determine the structure, morphology, elemental composition and electronic state of pristine and surface modified LiNi0.7Co0.2Mn0.1O2. The electrochemical testing indicates that the 0.3 mol% CeO2-coated LiNi0.7Co0.2Mn0.1O2 demonstrates excellent cycling capability and rate performance, the discharge specific capacity is 161.7 mA h g(-1) with the capacity retention of 86.42% after 100 cycles at a current rate of 0.5 C, compared to 135.7 mA h g(-1) and 70.64% for bare LiNi0.7Co0.2Mn0.1O2, respectively. Even at 5 C, the discharge specific capacity is still up to 137.1 mA h g(-1) with the capacity retention of 69.0%, while the NCM only delivers 95.5 mA h g(-1) with the capacity retention of 46.6%. The outstanding electrochemical performance is assigned to the excellent oxidation capacity of CeO2 which can oxidize Ni2+ to Ni3+ and Mn3+ to Mn4+ with the result that suppress the occurrence of Li+/Ni2+ mixing and phase transmission. Furthermore, CeO2 coating layer can protect the structure to avoid the occurrence of side reaction. The CeO2-coated composite with enhanced structural stability, cycling capability and rate performance is a promising cathode material candidate for lithium-ion battery. |
| DOI | 10.1016/j.ceramint.2018.09.145 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.isl.ac.cn/handle/363002/34085 |
| 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 | Dong, Shengde,Zhou, Yuan,Hai, Chunxi,et al. Ultrathin CeO2 coating for improved cycling and rate performance of Ni-rich layered LiNi0.7Co0.2Mn0.1O2 cathode materials[J]. CERAMICS INTERNATIONAL,2019,45(1):144-152. |
| APA | Dong, Shengde.,Zhou, Yuan.,Hai, Chunxi.,Zeng, Jinbo.,Sun, Yanxia.,...&Ma, Luxiang.(2019).Ultrathin CeO2 coating for improved cycling and rate performance of Ni-rich layered LiNi0.7Co0.2Mn0.1O2 cathode materials.CERAMICS INTERNATIONAL,45(1),144-152. |
| MLA | Dong, Shengde,et al."Ultrathin CeO2 coating for improved cycling and rate performance of Ni-rich layered LiNi0.7Co0.2Mn0.1O2 cathode materials".CERAMICS INTERNATIONAL 45.1(2019):144-152. |
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| Ultrathin CeO2 coati（4890KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | 浏览 请求全文 | |
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