Synthesis and electrochemical performance of spinel-type LiMn 2O 4 using γ-MnOOH rods as self-template for lithium ion battery

Lei He, Shichao Zhang, Xin Wei, Zhijia Du, Guanrao Liu, Yalan Xing

Research output: Contribution to journalArticlepeer-review

42 Scopus citations

Abstract

The single crystalline LiMn 2O 4 rods are synthesized by solid state reaction at varying temperatures (450 °C and 550 °C) using γ-MnOOH rods as self-templates, which are obtained by a typical hydrothermal process. X-ray diffraction, scanning electron microscopy, transmission electron microscopy and electrochemical tests are thoroughly conducted/performed to investigate its structure and properties. XRD, SEM and TEM observations show that LiMn 2O 4 spinel-type powders have good crystallinity and similar rods morphology with the width of 300-400 nm and the length of 500 nm-5 μm. As the cathode material for lithium batteries, LiMn 2O 4 synthesized at 450 °C delivers higher initial discharge capacity of 123.2 mA h g -1 at 0.1C and retains 84.0 mA h g -1 after 500 cycles at 10C rate. Even at a high current density of 40C, the material still presents an excellent discharge capability of 95.2 mA h g -1. The probable effect of structure and prepared-temperature is analyzed in detail.

Original languageEnglish
Pages (from-to)228-235
Number of pages8
JournalJournal of Power Sources
Volume220
DOIs
StatePublished - Dec 15 2012
Externally publishedYes

Funding

This work was supported by the National Natural Science Foundation of China (Grants 50954005 and 51074011 ), the National 863 Program (Grants 2006AA03Z230 and 2008AA03Z208 ), and the National Basic Research Program of China (Grant 2007CB936502 ).

FundersFunder number
National 863 Program2006AA03Z230, 2008AA03Z208
National Natural Science Foundation of China50954005, 51074011
National Basic Research Program of China (973 Program)2007CB936502

    Keywords

    • Electrochemical performance
    • High rate
    • Lithium manganese oxide
    • Lithium-ion batteries

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