Unraveling the multiple effects of li2zro3 coating on the structural and electrochemical performances of licoo2 as high-voltage cathode materials
文献类型：期刊论文
| 作者 | Zhang, Jicheng1; Gao, Rui1; Sun, Limei2; Zhang, Heng1; Hu, Zhongbo1; Liu, Xiangfeng1 |
| 刊名 | Electrochimica acta
 |
| 出版日期 | 2016-08-10 |
| 卷号 | 209页码:102-110 |
| 关键词 | Lithium-ion battery Licoo2 Surface coating Li2zro3 Synchronous lithiation strategy |
| ISSN号 | 0013-4686 |
| DOI | 10.1016/j.electacta.2016.05.066 |
| 通讯作者 | Liu, xiangfeng(liuxf@ucas.ac.cn) |
| 英文摘要 | The poor cycle performance, low rate capability and thermo-instability limit the practical application of licoo2 as high-voltage cathode materials for lithium-ion batteries. herein, we propose an integrated modification strategy which combines the advantages of elements doping, surface modifications and even the high li+-diffusion of the coating layer. in this study, li+-conductive li2zro3 has been successfully coated on the surface of licoo2 (li2zro3@lco) through a synchronous lithiation strategy and the multiple effects of li2zro3 coating on the structural and electrochemical performances of licoo2 as high-voltage cathode materials for li-ion batteries have been discovered. in compared to bare licoo2, the cycle performance, polarization, rate capability and thermo-stability of li2zro3@lzo have been significantly improved. li2zro3@lco shows a much higher capacity retention than bare licoo2 both at 25 degrees c (85.2% vs. 32.6% at 5 c, 1 c = 200 ma g(-1)) and 55 degrees c (71.3% vs. 13.9% at 5 c), and the specific capacity at 10 c has also been largely increased from 33.9 mah g(-1) to 103.4 mah g(-1). the enhancement of the electrochemical performances can be largely attributed to the multiple effects of li+-conductive li2zro3 coating: the alleviation of side reactions and transition metal dissolution, the enhancement of li-ion diffusion coefficient and electronic conductivity, zr4+ migration and doping, the resulting interplanar spacing expansion and the improvement of the layered structure stability. (c) 2016 elsevier ltd. all rights reserved. |
| WOS关键词 | LITHIUM-ION BATTERIES ; HIGH-RATE CAPABILITY ; X-RAY-DIFFRACTION ; INTERCALATION CATHODE ; AL2O3-COATED LICOO2 ; COATED LICOO2 ; DOPED LICOO2 ; 4.5 V ; IMPROVEMENT ; STABILITY |
| WOS研究方向 | Electrochemistry |
| WOS类目 | Electrochemistry |
| 语种 | 英语 |
| WOS记录号 | WOS:000379504600012 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2374649 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Liu, Xiangfeng |
| 作者单位 | 1.Univ Chinese Acad Sci, Coll Mat Sci & Optoelect Technol, Beijing 100049, Peoples R China 2.China Inst Atom Energy, Dept Nucl Phys, Beijing 102413, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Jicheng,Gao, Rui,Sun, Limei,et al. Unraveling the multiple effects of li2zro3 coating on the structural and electrochemical performances of licoo2 as high-voltage cathode materials[J]. Electrochimica acta,2016,209:102-110. |
| APA | Zhang, Jicheng,Gao, Rui,Sun, Limei,Zhang, Heng,Hu, Zhongbo,&Liu, Xiangfeng.(2016).Unraveling the multiple effects of li2zro3 coating on the structural and electrochemical performances of licoo2 as high-voltage cathode materials.Electrochimica acta,209,102-110. |
| MLA | Zhang, Jicheng,et al."Unraveling the multiple effects of li2zro3 coating on the structural and electrochemical performances of licoo2 as high-voltage cathode materials".Electrochimica acta 209(2016):102-110. |
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来源：中国科学院大学
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