期刊
JOURNAL OF POWER SOURCES
卷 196, 期 18, 页码 7763-7766出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2011.04.019
关键词
Spinel; LTO; Carbon coating; Anode; Lithium; Battery
资金
- Ministry of Education, Science and Technology [R31-10092]
- Korea government Ministry of Knowledge Economy [20104010100560]
- Ministry of Education, Science and Technology (MEST) of Korea [2010-0001842]
Spherical, high tap density, carbon-coated Li4Ti5O12 powders are synthesized by a spray-drying process followed by a facile pitch coating. XRD, SEM, TEM analyses show that the carbon layer uniformly coats the Li4Ti5O12 particles without producing any crystalline changes. We demonstrate that the carbon coating significantly increases the electrical conductivity of Li4Ti5O12 making it an efficient, high rate electrode for lithium cells. The electrochemical tests in fact confirm that the 3.25 wt% carbon-coated Li4Ti5O12 electrode operates with ultra high rate capacity levels, i.e., 100 C and has excellent capacity retention and charge-discharge efficiency for a life extending over 100 cycles. (C) 2011 Elsevier B.V. All rights reserved.
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