Electrochemical performance of pyrolytic carbon-coated natural graphite spheres
文献类型：期刊论文
| 作者 | H. L. Zhang ; S. H. Liu ; F. Li ; S. Bai ; C. Liu ; J. Tan ; H. M. Cheng |
| 刊名 | Carbon
 |
| 出版日期 | 2006 |
| 卷号 | 44期号:11页码:2212-2218 |
| 关键词 | battery carbon electrochemical properties microstructure lithium ion batteries anode material electrode morphology |
| ISSN号 | 0008-6223 |
| 中文摘要 | Natural graphite (NG) spheres were coated by pyrolytic carbon from the thermal decomposition Of C2H2/Ar at 950 degrees C in a fluidized bed reactor. Scanning electron microscopy and secondary electron focused ion beam (FIB) images clearly showed that a pyrolytic carbon layer with a thickness of similar to 250 nm was uniformly deposited on the surface of the NG spheres. Electrochemical performance measurements for the original and coated NG spheres as anode materials of a lithium-ion battery indicated that the first coulombic efficiency and cyclability were significantly improved in the coated sample. The reasons for this were investigated by analyzing structural characteristics, specific surface area, pore size distribution, and solid electrolyte interphase (SEI) film. Using a FIB workstation, we demonstrated, by cross-section imaging of a coated NG sphere that had experienced five electrochemical cycles, that the SEI film formed on the non-graphitic pyrolytic carbon surface became thinner (60-150 nm) and more uniform in composition compared with that on the surface of uncoated NG spheres; and the formation of an "internal SEI film" inside the NG spheres was also remarkably suppressed due to the uniform coating of pyrolytic carbon. (C) 2006 Published by Elsevier Ltd. |
| 原文出处 | |
| 公开日期 | 2012-04-14 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/34693]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | H. L. Zhang,S. H. Liu,F. Li,et al. Electrochemical performance of pyrolytic carbon-coated natural graphite spheres[J]. Carbon,2006,44(11):2212-2218. |
| APA | H. L. Zhang.,S. H. Liu.,F. Li.,S. Bai.,C. Liu.,...&H. M. Cheng.(2006).Electrochemical performance of pyrolytic carbon-coated natural graphite spheres.Carbon,44(11),2212-2218. |
| MLA | H. L. Zhang,et al."Electrochemical performance of pyrolytic carbon-coated natural graphite spheres".Carbon 44.11(2006):2212-2218. |
入库方式： OAI收割
来源：金属研究所
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