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Li(Ni1/3Co1/3Mn1/3)O2 with High Rate Capability Synthesized via a Novel Gel-Combustion Method

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Abstract:

Li(Ni1/3Co1/3Mn1/3)O2 material with high rate capability was synthesized by a novel gel-combustion method using polyvinylpyrrolidone as a polymer chelating agent and a fuel. X-ray diffraction (XRD), scanning electron microscope (SEM) and energy dispersive spectrometer (EDS) were used to study the structure, morphology and element distribution of the Li(Ni1/3Co1/3Mn1/3)O2 material. XRD analysis showed that all samples were α-NaFeO2 structure and Li(Ni1/3Co1/3Mn1/3)O2 prepared at 900 °C had the highest c/a of 4.977 indicating the highest layered-ness. EDS scan demonstrated that the precursor was homogeneous. SEM images indicated all samples were well crystallized. Charge and discharge tests showed all samples had good rate capability. Among them, Li(Ni1/3Co1/3Mn1/3)O2 prepared at 900 °C had the highest capacity and the best rate capability. It delivered 162.1 mAh•g−1 at 0.25 C between 2.5 and 4.3 V and the capacity retention was about 81% compared to that of 0.25C rate.

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Periodical:

Advanced Materials Research (Volumes 391-392)

Pages:

973-977

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.391-392.973

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Online since:

December 2011

Authors:

Jing Mao, Ke Hua Dai, Yu Chun Zhai

Keywords:

Cathode Material, Combustion Synthesis, Li(Ni1/3Co1/3Mn1/3)O2, Lithium-Ion Battery, Rate Capability

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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