Preparation and Electrochemical Properties of LiMn0.8Fe0.2PO4/C Nanocomposite
文献类型：期刊论文
| 作者 | Su Jing; Wu Xing-Long; Guo Yu-Guo
|
| 刊名 | JOURNAL OF INORGANIC MATERIALS
 |
| 出版日期 | 2013-11-01 |
| 卷号 | 28期号:11页码:1248-1254 |
| 关键词 | Limn0.8fe0.2po4/c Nanocomposite Galvanostatic Intermittent Titration Technique Electrochemical Impedance Spectroscopy Chemical Diffusion Coefficient Of Lithium Lithium-ion Battery |
| ISSN号 | 1000-324X |
| DOI | 10.3724/SP.J.1077.2013.13142 |
| 英文摘要 | Olivine-structured LiMn0.8Fe0.2PO4/C solid solution was successfully prepared by a Sol-Gel approach combined with a high-temperature solid-state reaction, and characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) and transmission electron microscope (TEM). The results revealed that LiMn0.8Fe0.2PO4 nanoparticles were evenly dispersed in the in-situ formed carbon conductive network. When the nanocomposite served as a cathode material for lithium-ion batteries (LIBs), except a short plateau (-3.5 V vs Li/Li) ascribed to Fe(3+)7Fe(2+) couples in the charging/discharging profile, the long plateau at higher voltage (-4.1 V vs Li+/Li) is corresponding to the redox reaction of Mn during the Li+ extraction/insertion in the LiMn0.8Fe0.2PO4 lattice, and this high voltage plateau can significantly enhance the energy density of relevant L1Bs. In addition, the chemical diffusion behavior of lithium in the LiMn0.8Fe0.2PO4/C electrode was investigated in detail using galvanostatic intermittent titration technique (GITT) and electrochemical impedance spectroscope (EIS), and the chemical diffusion coefficients of lithium, Du, obtained by GITT and EIS were 5x 10(45) -1 x 10(14) cm(2)/s and 1.27x 10(-13) - 2.11 xi cm(2)/s, respectively. The results indicate that the value of Du increases with elevated test temperature, and it can be inferred that the electrochemical properties of such materials can be improved by raising the working temperature. |
| 语种 | 英语 |
| WOS记录号 | WOS:000327420100016 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/54513]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Su Jing |
| 作者单位 | Chinese Acad Sci, Inst Chem, CAS Key Lab Mol Nanostruct & Nanotechnol, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Su Jing,Wu Xing-Long,Guo Yu-Guo. Preparation and Electrochemical Properties of LiMn0.8Fe0.2PO4/C Nanocomposite[J]. JOURNAL OF INORGANIC MATERIALS,2013,28(11):1248-1254. |
| APA | Su Jing,Wu Xing-Long,&Guo Yu-Guo.(2013).Preparation and Electrochemical Properties of LiMn0.8Fe0.2PO4/C Nanocomposite.JOURNAL OF INORGANIC MATERIALS,28(11),1248-1254. |
| MLA | Su Jing,et al."Preparation and Electrochemical Properties of LiMn0.8Fe0.2PO4/C Nanocomposite".JOURNAL OF INORGANIC MATERIALS 28.11(2013):1248-1254. |
入库方式： OAI收割
来源：化学研究所
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