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Issue 83, 2014
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Basicity-controlled synthesis of Li4Ti5O12 nanocrystals by a solvothermal method

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Abstract

Spinel-type lithium titanate (Li4Ti5O12) nanocrystals were synthesized at a low temperature with control of the basicity by a solvothermal method without any calcination processes. The Li–Ti–O precursor was produced under relatively high pH conditions (pH > 11) in the initial stage. The spinel phase was then formed through delithiation and dehydration from the precursor by lowering the pH of the system (pH < 10). The direct synthesis of the Li4Ti5O12 nanocrystals was achieved through self-control of the basicity using a two-phase system of water–ethanol and toluene–oleic acid. The Li4Ti5O12 crystals were formed from the precursor by decreasing the basicity. The average size of the nanocrystals prepared by the one-step method was ca. 13 nm, and the specific surface area was 158 m2 g−1. On the basis of the electrochemical measurement, the Li4Ti5O12 nanocrystals produced in a low-temperature solution system are applicable for an anode material of a lithium-ion rechargeable battery.

Graphical abstract: Basicity-controlled synthesis of Li4Ti5O12 nanocrystals by a solvothermal method

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Publication details

The article was received on 04 Jul 2014, accepted on 10 Sep 2014 and first published on 10 Sep 2014


Article type: Paper
DOI: 10.1039/C4RA06646D
RSC Adv., 2014,4, 44124-44129
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    Basicity-controlled synthesis of Li4Ti5O12 nanocrystals by a solvothermal method

    H. Kageyama, Y. Oaki and H. Imai, RSC Adv., 2014, 4, 44124
    DOI: 10.1039/C4RA06646D

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