| The synergistic effects of Li2SiO3-coating and Si4+-doping for LiNi0.5Mn0.5O2 cathode materials on the structure and the electrochemical properties | |
Yang, Guowei1,2,3; Jia, Guofeng1,2; Shangguan, Xuehui1,2,3; Zhu, Zenghu1,2; Peng, Zhengjun1,2; Zhuge, Qin1,2; Li, Faqiang1,2,4; Cui, Xiaoling5
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| 2017 | |
| 发表期刊 | Journal of the Electrochemical Society
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| ISSN | 00134651 |
| 卷号 | 164期号:12页码:A2889-A2897 |
| 摘要 | zLi2SiO3@LiNi0.5Mn0.5O2 (z = 0, 0.03, 0.05, 0.08) ("@" means "was coated on the surface of") cathode materials had been successfully prepared via a syn-lithiation strategy. The structure and the electrochemical properties were analyzed systematically. The results of the structural analysis showed that Li2SiO3 was well coated on the surface of the material, and partial of Si4+ was doped into the structure. In addition, the results of the electrochemical measurements suggest that 3 mol% Li2SiO3-coated LiNi0.5Mn0.5O2 electrode has the best electrochemical performance, including the highest capacity, best cycle stability and rate performance. The capacity retention is improved about 24% by 3 mol% Li2SiO3 coating at 60C. Additionally, all the resistances of the 3 mol% Li2SiO3@LiNi0.5Mn0.5O2 cathode material are considerably smaller than that of the un-doped material, which means it has a faster lithium-ion migration rate. This finding is in good agreement with the calculated results. In summary, Li2SiO3 coating and Si4+ doping can lower Li/Ni mixing, increase the structural stability, reduce polarization, decrease the migration resistance and improve the migration rate of the lithium-ion which, in turn, improves the electrochemical properties of LiNi0.5Mn0.5O2. © 2017 The Electrochemical Society. All rights reserved. |
| 关键词 | Cathodes Coated materials Coatings Electrochemical properties Lithium Manganese compounds Nickel compounds Silicon compounds Stability Capacity retention Cath-ode materials Cycle stability Electrochemical measurements Electrochemical performance Rate performance Structural stabilities Synergistic effect |
| DOI | 10.1149/2.0131713jes |
| 收录类别 | EI ; SCIE |
| 语种 | 英语 |
| WOS研究方向 | Electrochemistry ; Materials Science |
| WOS类目 | Electrochemistry ; Materials Science, Coatings & Films |
| WOS记录号 | WOS:000415283600077 |
| 出版者 | Electrochemical Society Inc. |
| EI入藏号 | 20174504363640 |
| EI主题词 | Lithium compounds |
| EI分类号 | 549.1 Alkali Metals - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 801.4.1 Electrochemistry - 813.2 Coating Materials |
| 来源库 | Compendex |
| 分类代码 | 542.4 Lithium and Alloys - 801.4.1 Electrochemistry - 813 Coatings and Finishes - 813.2 Coating Materials |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | https://ir.lut.edu.cn/handle/2XXMBERH/114884 |
| 专题 | 石油化工学院 |
| 通讯作者 | Jia, Guofeng |
| 作者单位 | 1.Chinese Acad Sci, Qinghai Inst Salt Lakes, Key Lab Comprehens & Highly Efficient Utilizat Sa, Xining 810008, Qinghai, Peoples R China; 2.Key Lab Salt Lake Resources Chem Qinghai Prov, Xining 810008, Qinghai, Peoples R China; 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 4.Qinghai Green Grass New Energy Technol Co Ltd, Qinghai Res Ctr Low Temp Lithium Ion Battery Tech, Xining 810000, Qinghai, Peoples R China; 5.Lanzhou Univ Technol, Coll Petrochem Technol, Lanzhou 730050, Gansu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, Guowei,Jia, Guofeng,Shangguan, Xuehui,et al. The synergistic effects of Li2SiO3-coating and Si4+-doping for LiNi0.5Mn0.5O2 cathode materials on the structure and the electrochemical properties[J]. Journal of the Electrochemical Society,2017,164(12):A2889-A2897. |
| APA | Yang, Guowei.,Jia, Guofeng.,Shangguan, Xuehui.,Zhu, Zenghu.,Peng, Zhengjun.,...&Cui, Xiaoling.(2017).The synergistic effects of Li2SiO3-coating and Si4+-doping for LiNi0.5Mn0.5O2 cathode materials on the structure and the electrochemical properties.Journal of the Electrochemical Society,164(12),A2889-A2897. |
| MLA | Yang, Guowei,et al."The synergistic effects of Li2SiO3-coating and Si4+-doping for LiNi0.5Mn0.5O2 cathode materials on the structure and the electrochemical properties".Journal of the Electrochemical Society 164.12(2017):A2889-A2897. |
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