Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 10, Issue 8, Pages 1168-1171Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2008.05.036
Keywords
lithium-ion batteries; safety; accelerating rate calorimetry; Al-doping; lithium nickel cobalt manganese aluminum oxide
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Funding
- NSERC
- 3M Canada
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The high temperature reactions between 1 M LiPF6 EC:DEC and Al-doped LiNi1/3Mn1/3Co(1/3-z)AlZO2 charged to 4.3 V were studied by accelerating rate calorimetry (ARC) and compared with those of charged LiNi1/3Mn1/3Co1/3O2 and LiMn2O4. At substitution for Co in LiNi1/3Mn1/3Co1/3O2 improves the thermal stability. Materials with z > 0.06 are less reactive with electrolyte than spinet LiMn2O4 at all temperatures studied. The maximum self-heating rate (SHR) attained and the specific capacity decrease as the Al content increases. There is a range of compositions near z = 0.1 that show excellent promise as materials which are both safer than and more energy dense than spinel LiMn2O4. (C) 2008 Elsevier B.V. All rights reserved.
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