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Open AccessArticle

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

School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
Guangxi Colleges and Universities Key Laboratory of Novel Energy Materials and Related Technology, Nanning 530004, China
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
Materials 2017, 10(2), 134;
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)
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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