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Effects of adhesives on the electrochemical performance of monodisperse LiMn0.8Fe0.2PO4/C microspheres as cathode materials for high power lithium-ion batteries

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Abstract

A facile co-precipitation approach combined with spray-drying and high-temperature calcinations was developed to synthesize LiMn0.8Fe0.2PO4/C microspheres on a large scale. With an open porous structure, these microspheres are composed of nanoparticles coated with a carbon layer. The electrochemical performances of a LiMn0.8Fe0.2PO4/C cathode were investigated with a water-soluble adhesive, polyacrylic latex (LA133), and compared with the commercial polyvinylidene difluoride (PVDF). The results show that LA133 makes better distribution between the microspheres and acetylene black with a larger and closer contact and stronger adherence. The testing results show that the LiMn0.8Fe0.2PO4/C demonstrates a reversible capacity of 161 mA h g−1. The electrodes with the LA133 adhesive attain higher discharge capacities than the electrodes with PVDF at a large current density, and deliver a long cycle life of 500 cycles at 5C with an excellent capacity retention ratio of 70.5% at room temperature. Even at a low temperature of 0 °C, the LiMn0.8Fe0.2PO4/C electrodes with LA133 retain a capacity of 117 mA h g−1 and stability.

Graphical abstract: Effects of adhesives on the electrochemical performance of monodisperse LiMn0.8Fe0.2PO4/C microspheres as cathode materials for high power lithium-ion batteries

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Publication details

The article was received on 04 Jan 2017, accepted on 17 Mar 2017 and first published on 17 Mar 2017


Article type: Paper
DOI: 10.1039/C7TA00104E
Citation: J. Mater. Chem. A, 2017, Advance Article
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    Effects of adhesives on the electrochemical performance of monodisperse LiMn0.8Fe0.2PO4/C microspheres as cathode materials for high power lithium-ion batteries

    J. Li, M. Xiang, Y. Wang, J. Wu, H. Zhao and H. Liu, J. Mater. Chem. A, 2017, Advance Article , DOI: 10.1039/C7TA00104E

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