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Lee, Hyun-Wook
Energy Storage and Electron Microscopy Laboratory
Research Interests
  • Energy storage, secondary batteries, transmission electron microscopy, real time analysis

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Spinel LiMn2O4 nanorods as lithium ion battery cathodes

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Title
Spinel LiMn2O4 nanorods as lithium ion battery cathodes
Author
Kim, Do KyungMuralidharan, P.Lee, Hyun-WookRuffo, RiccardoYang, YuanChan, Candace K.Peng, HailinHuggins, Robert A.Cui, Yi
Keywords
HIGH-CAPACITY; PERFORMANCE; ELECTRODES; NANOWIRES; ROUTE; NANOPARTICLES; COMBUSTION; POWER
Issue Date
2008-11
Publisher
AMER CHEMICAL SOC
Citation
NANO LETTERS, v.8, no.11, pp.3948 - 3952
Abstract
Spinel LiMn2O4 is a low-cost, environmentally friendly, and highly abundant material for Li-ion battery cathodes. Here, we report the hydrothermal synthesis of single-crystalline beta-MnO2 nanorods and their chemical conversion into free-standing single-crystalline LiMn2O4 nanorods using a simple solid-state reaction. The LiMn2O4 nanorods have an average diameter of 130 nm and length of 1.2 mu m. Galvanostatic battery testing showed that LiMn2O4 nanorods have a high charge storage capacity at high power rates compared with commercially available powders. More than 85% of the initial charge storage capacity was maintained for over 100 cycles. The structural transformation studies showed that the Li ions intercalated into the cubic phase of the LiMn2O4 with a small change of lattice parameter, followed by the coexistence of two nearly identical cubic phases in the potential range of 3.5 to 4.3V.
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DOI
10.1021/nl8024328
ISSN
1530-6984
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