Journal
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
Volume 69, Issue 5-6, Pages 1257-1260Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jpcs.2007.10.047
Keywords
inorganic compounds; chemical synthesis; electron microscopy; electrochemical properties
Funding
- National IT Industry Promotion Agency (NIPA), Republic of Korea [C1090-0801-0023] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Carbon-coated LiFePO4 (LiFePO4/C) Composite cathode-active materials of submicron size and phase-pure olivine structure were synthesized by a mechanical activation (MA) process. The conductive carbon coating was achieved by addition of (i) carbon powder directly or (ii) sucrose as the carbon precursor, during synthesis. LiFePO4/C containing 6 wt% carbon prepared by the two methods showed good electrochemical properties as cathodes in lithium batteries at room temperature with high active material utilization of > 94% at 0.1 C rate and stable cycle performance. The sucrose precursor method leads to the formation of a thin, porous and more uniform carbon coating around the particles and results in a slightly higher discharge capacity (similar to 3%) compared to the other sample. (C) 2007 Elsevier Ltd. All rights reserved.
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