Improving the electrochemical performance of LiMn0.85Fe0.15PO4-LiFePO4 core-shell materials based on an investigation of carbon source effect

Title
Improving the electrochemical performance of LiMn0.85Fe0.15PO4-LiFePO4 core-shell materials based on an investigation of carbon source effect
Author
선양국
Keywords
Carbon coating; Olivine; Core-shell; Micron-size; Lithium battery; RECHARGEABLE LITHIUM BATTERIES; CATHODE MATERIAL; LIMNPO4; TEMPERATURE; CAPACITY; LIFEPO4
Issue Date
2013-12
Publisher
ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Citation
Journal of Power Sources, Vol.244, No.- [2013], p663-667
Abstract
Core-shell type C-LiMn0.85Fe0.15PO4-LiFePO4 olivine materials are synthesized by a co-precipitation method followed by double carbon coating with different kinds of carbon sources. Through EDX analysis, the distribution of the carbon layer is confirmed within the pores and the surface of the particles varied with different types of carbon sources. Among them, the ascorbic acid-pitch mix coated core-shell electrode show the best discharge capacity of 154 mAh g(-1) at 1/20 C-rate and 100 mAh g(-1) at 5 C-rate. This improved electrochemical property is ascribed to the uniform carbon coating layer both inside the pores and on the outside surface using different molecular weight carbon sources. (C) 2012 Elsevier B.V. All rights reserved.
URI
https://www.sciencedirect.com/science/article/pii/S037877531201909X?via%3Dihubhttp://hdl.handle.net/20.500.11754/45334
ISSN
0378-7753
DOI
10.1016/j.jpowsour.2012.12.063
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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