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Materials 2017, 10(2), 134; doi:10.3390/ma10020134

Deep Eutectic Solvent Synthesis of LiMnPO4/C Nanorods as a Cathode Material for Lithium Ion Batteries

1
School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
2
Guangxi Colleges and Universities Key Laboratory of Novel Energy Materials and Related Technology, Nanning 530004, China
3
The New Rural Development Research Institute, Guangxi University, Nanning 530004, China
*
Author to whom correspondence should be addressed.
Academic Editors: Bingqing Wei and Jian-Gan Wang
Received: 22 November 2016 / Revised: 25 January 2017 / Accepted: 3 February 2017 / Published: 6 February 2017
(This article belongs to the Special Issue Materials for Electrochemical Capacitors and Batteries)
View Full-Text   |   Download PDF [3829 KB, uploaded 6 February 2017]   |  

Abstract

Olivine-type LiMnPO4/C nanorods were successfully synthesized in a chloride/ethylene glycol-based deep eutectic solvent (DES) at 130 °C for 4 h under atmospheric pressure. As-synthesized samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR) and electrochemical tests. The prepared LiMnPO4/C nanorods were coated with a thin carbon layer (approximately 3 nm thick) on the surface and had a length of 100–150 nm and a diameter of 40–55 nm. The prepared rod-like LiMnPO4/C delivered a discharge capacity of 128 mAh·g−1 with a capacity retention ratio of approximately 93% after 100 cycles at 1 C. Even at 5 C, it still had a discharge capacity of 106 mAh·g−1, thus exhibiting good rate performance and cycle stability. These results demonstrate that the chloride/ethylene glycol-based deep eutectic solvents (DES) can act as a new crystal-face inhibitor to adjust the oriented growth and morphology of LiMnPO4. Furthermore, deep eutectic solvents provide a new approach in which to control the size and morphology of the particles, which has a wide application in the synthesis of electrode materials with special morphology. View Full-Text
Keywords: lithium ion batteries; cathode materials; LiMnPO4; deep eutectic solvents lithium ion batteries; cathode materials; LiMnPO4; deep eutectic solvents
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MDPI and ACS Style

Wu, Z.; Huang, R.-R.; Yu, H.; Xie, Y.-C.; Lv, X.-Y.; Su, J.; Long, Y.-F.; Wen, Y.-X. Deep Eutectic Solvent Synthesis of LiMnPO4/C Nanorods as a Cathode Material for Lithium Ion Batteries. Materials 2017, 10, 134.

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