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Title: Carbon-coated LiTi2(PO4)3 : an ideal insertion host for lithium-ion and sodium-ion batteries
Authors: Vanchiappan, Aravindan
Wong, Chui Ling
Steffen, Hartung
Nicolas, Bucher
Madhavi, Srinivasan
Keywords: DRNTU::Engineering::Materials::Energy materials
Issue Date: 2014
Source: Vanchiappan, A., Wong, C. L., Steffen, H., Nicolas, B., & Srinivasan, M. (2014). Carbon-coated LiTi2(PO4)3 : an ideal insertion host for lithium-ion and sodium-ion batteries. Chemistry - An Asian Journal, 9(3), 878-882.
Series/Report no.: Chemistry - an Asian journal
Abstract: We report the extraordinary performance of carbon-coated sodium super ion conductor (NASICON)-type LiTi2(PO4)3 as an ideal host matrix for reversible insertion of both Li and Na ions. The NASICON-type compound was prepared by means of a Pechini-type polymerizable complex method and was subsequently carbon coated. Several characterization techniques such as XRD, thermogravimetric analysis (TGA), field-emission (FE) SEM, TEM, and Raman analysis were used to study the physicochemical properties. Both guest species underwent a two-phase insertion mechanism during the charge/discharge process that was clearly evidenced from galvanostatic and cyclic voltammetric studies. Unlike that of Li (≈1.5 moles of Li), Na insertion exhibits better reversibility (≈1.59 moles of Na) while experiencing a slightly higher capacity fade (≈8 % higher than Li) and polarization (780 mV) than Li. However, excellent rate capability profiles were noted for Na insertion relative to its counterpart Li. Overall, the Na insertion properties were found to be superior relative to Li insertion, which makes carbon-coated NASICON-type LiTi2(PO4)3 hosts attractive for the development of next-generation batteries.
ISSN: 1861-4728
DOI: 10.1002/asia.201301461
Rights: © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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