Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 10, Issue 10, Pages 1478-1481Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2008.07.028
Keywords
Spinel; Cathode; Li-ion; Mn dissolution; Cycle life; Rate capability
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Funding
- MIC/IITA [2006-S-057-01, 4.35V]
- Cathode Material for Cellular Phone Power Source
- National Research Foundation of Korea [과C6A2605] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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LiMn2O4 spinet nanorods prepared from nanowire MnO2 templates were capped with polyvinyl pyrrolidone (PVP) and coated with ZrC2O4 precursors in aqueous solution. Upon annealing at 600 degrees C in air, an amorphous ZrO2 nanoscale coating layer was obtained on the spinel nanoparticles with a particle size of < 100 nm that formed from the splitting of the original spinet nanorods. The electrochemical cycling results clearly showed that nanoscale ZrO2 coating significantly improved the rate capability and cycle life at 65 degrees C in spite of very high surface area of the spinel nanoparticles. (c) 2008 Elsevier B.V. All rights reserved.
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