Abstract
Spinel LiMn2O4microspheres with durable high rate capability were synthesized by a facile route using spherical MnCO3precursors as the self-supported templates, combined with the calcinations of LiNO3at 700 °C for 8 h. The spherical MnCO3precursors were obtained from the control of the crystallizing process of Mn2+ions and NH4HCO3in aqueous solution. The effects of the mole ratio of the raw materials, reaction time, and reaction temperature on the morphology and yield of the MnCO3were investigated. The as-synthesized MnCO3and LiMn2O4microspheres were characterized by powder X-ray diffractometry (XRD) and scanning electron microscopy (SEM). Galvanostatic charge/discharge tests indicate that the spinel LiMn2O4microspheres deliver a discharge capacity of 90 mA·h/g at 10C rate show good capacity retention capability (75 of their initial capacity after 800 cycles at 10C rate). The durable high rate capability suggests that the as-synthesized LiMn2O4microspheres are promising cathode materials for high power lithium ion batteries.
Original language | English |
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Pages (from-to) | 2541-2547 |
Number of pages | 7 |
Journal | Transactions of Nonferrous Metals Society of China (English Edition) |
Volume | 22 |
Issue number | 10 |
DOIs | |
Publication status | Published - 1 Oct 2012 |
Externally published | Yes |
Keywords
- LiMn O microspheres 2 4
- MnCO microspheres 3
- rate capability
- self-supported template
ASJC Scopus subject areas
- Condensed Matter Physics
- Geotechnical Engineering and Engineering Geology
- Metals and Alloys
- Materials Chemistry