Microscale spherical carbon-coated Li(4)Ti(5)O(12) as ultra high power anode material for lithium batteries

Title
Microscale spherical carbon-coated Li(4)Ti(5)O(12) as ultra high power anode material for lithium batteries
Author
선양국
Keywords
STRAIN INSERTION MATERIAL; ION BATTERIES; ELECTRODE MATERIAL; RATE-CAPABILITY; SPINEL OXIDES; CELLS; ELECTROCHEMISTRY; SYSTEM; LI4/3TI5/3O4; SAFETY
Issue Date
2011-04
Publisher
Royal SOC Chemistry
Citation
Energy and Environmental Science, 2011, 4(4), P.1345-1351
Abstract
Microscale C-Li4Ti5O12 particles with high tap density were synthesized by a simple solid-state reaction using TiO2, Li2CO3, and pitch. The effect of the carbon content on the physicochemical and electrochemical properties of this material was extensively studied. On calcination of the particles at high temperature in an inert atmosphere, the uniformly coated carbon layer from pitch inhibited the growth of primary particles, maintaining the spherical morphology, similar to the TiO2 precursor in size and shape, and also enabling partial reduction of the starting Ti4+ to Ti3+. Excellent electronic conductivity of the C-coated Li4Ti5O12 resulted from the presence of the highly conducting carbon coating layer and the mixed valence state of Ti3+ and Ti4+. Both the nanoporous morphology and highly conducting carbon coating layer in Li4Ti5O12 particles gave rise to ultra high rate capability.
URI
http://pubs.rsc.org/en/Content/ArticleLanding/2011/EE/c0ee00620c#!divAbstract
ISSN
1754-5692
DOI
10.1039/c0ee00620c
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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