Hierarchical LiMn0.5Fe0.5PO4/C nanorods with excellent electrochemical performance synthesized by rheological phase method as cathode for lithium ion battery
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- 作者：Huihui Shen ; Wei Xiang ; Xiaxing Shi ; Benhe Zhong ; Heng Liu
- 关键词：LiMn0.5Fe0.5PO4/C ; Polyethylene ; glycol 4000 ; Nanorods ; Rheological phase method ; Cathode materials
- 刊名：Ionics
- 出版年：2016
- 出版时间：February 2016
- 年：2016
- 卷：22
- 期：2
- 页码：193-200
- 全文大小：1,291 KB
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Wei Xiang (1)
Xiaxing Shi (1)
Benhe Zhong (1)
Heng Liu (2)
1. College of Chemical Engineering, Sichuan University, Chengdu, 610065, People’s Republic of China
2. College of Material Science and Engineering, Sichuan University, Chengdu, 610065, People’s Republic of China - 刊物类别：Chemistry and Materials Science
- 刊物主题：Chemistry
Electrochemistry
Materials Science
Physical Chemistry
Condensed Matter
Renewable Energy Sources
Electrical Power Generation and Transmission - 出版者：Springer Berlin / Heidelberg
- ISSN：1862-0760
文摘
The hierarchical LiMn0.5Fe0.5PO4/C (LMFP) nanorods were first successfully synthesized by rheological phase method using polyethylene glycol 4000 (PEG 4000) as a template reagent. The physical and electrochemical properties of the LiMn0.5Fe0.5PO4/C were characterized by TG-DTG, XRD, FTIR, SEM, TEM, EIS and galvanostatic charge-discharge measurements. The results reveal that the PEG-LMFP/C synthesized with the assistance of PEG 4000 shows unique bundle-type shape assembled of nanorods, while the LMFP/C synthesized without PEG 4000 presents a platelet-like shape with some agglomeration. Besides, a uniformly carbon layer coating on the surface of the PEG-LMFP/C can be seen from TEM images. The PEG-LMFP/C exhibits high specific capacity and superior rate performance with discharge capacities of 162, 133, 108, 95, and 78 mAh · g−1 at 0.1, 1, 5, 10, and 20 C rates, respectively. It is demonstrated that the synthesis of LMFP/C with PEG 4000 can significantly decrease the characteristic sizes of the crystals, resulting in improved electrochemical performance. Keywords LiMn0.5Fe0.5PO4/C Polyethylene-glycol 4000 Nanorods Rheological phase method Cathode materials