Journal
CHEMNANOMAT
Volume 2, Issue 7, Pages 642-646Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cnma.201600106
Keywords
high-rate anode; lithium-ion batteries (LIBs); safe batteries; solid electrolyte interface (SEI); spinel Li4Ti5O12 (LTO)
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Funding
- Materials Sciences and Engineering Division, Office of Basic Energy Sciences, Office of Science, U.S. Department of Energy
- Critical Material Institute, an Energy Innovation Hub - U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Advanced Manufacturing Office
- U.S. Department of Energy [DE-AC05-00OR22725]
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Monodispersed Li4Ti5O12 (LTO) nanoparticles with controlled microstructure were successfully synthesized by a combination of hydrolysis and hydrothermal method followed by a post-annealing process. The scanning electron microscopy images showed that particles with a size of 30-50 nm were precisely controlled throughout the synthesis process. The electrochemical tests of the as-prepared LTO electrodes in a half-cell proved its high rate performance and outstanding cyclability which benefits from the preserved well-controlled nanoparticle size and morphology. LTO electrodes were also tested in a full cell configuration in pairing with LiFePO4 cathodes, which demonstrated a capacity of 147.3 mAhg(-1). In addition, we have also demonstrated that LTO materials prepared using lithium salts separated from geothermal brine solutions had good cyclability. These demonstrations provide a promising way for making low-cost, large-scale LTO electrode materials for energy storage applications.
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