Nanorod-assembled spinel Li1.05Mn1.95O4 rods with a central tunnel along the rod-axis for high rate capability of rechargeable lithium-ion batteries
✍ Scribed by Docheon Ahn; Jihyeon Gim; Namsoo Shin; Yang-Mo Koo; Jaekook Kim; Tae Joo Shin
- Publisher
- Elsevier Science
- Year
- 2010
- Tongue
- English
- Weight
- 960 KB
- Volume
- 55
- Category
- Article
- ISSN
- 0013-4686
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✦ Synopsis
a b s t r a c t Nanorod-assembled spinel Li 1.05 Mn 1.95 O 4 rods with a central tunnel along the rod-axis were synthesized using highly crystalline ˇ-MnO 2 rods as self-templates. The synthesized spinel Li 1.05 Mn 1.95 O 4 is an assembly of several single crystal-like nanorods with an average diameter and length of 100 and 400 nm, respectively, which was determined by microstructural Rietveld refinement using the synchrotron powder XRD data. Galvanostatic battery testing showed that central-tunneled and nanorod-assembled Li 1.05 Mn 1.95 O 4 rods have a high charge storage capacity at high current densities in comparison with those of the spinel rods without a tunnel structure and commercial powders. Moreover, a capacity retention value of ∼81% was observed at the end of 100 cycles at a current of 250 mAh g -1 .