Electrochemical Characterization of Superfine Spinel LiMn2O4 Synthesized By Microwave-Polymer Network Method

Abstract

Abstract: Superfine spinel LiMn₂O₄ powders were synthesized with a gelation precursor by microwave-polymer network
process. The gelation precursor was obtained by mixing Li₂CO₃, Mn(NO₃) and polyacrylamide. Electrochemical tests show that the initial specific
capacity is 120mAh/g, and the degradation rate of specific capacity is only 4.7% after 50 cycles. SEM and XRD results prove that the microwave-polymer
network process can increase the purity of the phase, reduce the particle size of spinel LiMn₂O₄, and provide more active sites for Li⁺ intercalation.
The microwave-polymer network process is a new method not only for synthesizing cathode material of Li ion cells,but also for synthesizing other advanced oxide
ceramic materials.

Key words: LiMn₂O₄, spinel, polymer, network, microwave

CLC Number:

TM911

YANG Shu-Ting,ZHANG Yan-Feng,LU Qing-Zhang,YIN Yan-Hong,ZHANG Ming-Chun,DING Li,ZHAO Lin-Zhi. Electrochemical Characterization of Superfine Spinel LiMn₂O₄ Synthesized By Microwave-Polymer Network Method[J]. Journal of Inorganic Materials.

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Electrochemical Characterization of Superfine Spinel LiMn₂O₄ Synthesized By Microwave-Polymer Network Method

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