Journal
ELECTROCHIMICA ACTA
Volume 53, Issue 28, Pages 8265-8268Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2008.05.024
Keywords
tri-(4-methoxythphenyl) phosphate; electrolyte additive; fire retardant; overcharge protection; lithium-ion batteries
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Funding
- National 973 Program of China [2002CB211800]
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A novel compound, tri-(4-methoxythphenyl) phosphate, was synthesized and investigated as a safety electrolyte additive for lithium-ion batteries. It was found that this additive could lower the flammability of the electrolyte, and thereby enhance the thermal stability of the Li-ion battery. Moreover, this molecule can also be polymerized at 4.35 V (vs. Li/Li+) to form a conducting polymer, which can protect the batteries from voltage runaway at overcharge by internal bypassing the overcharging current in the batteries. Thus, it is possible to use this electrolyte additive to provide both overcharge protection and flame retardancy for lithium-ion batteries without much influence on the battery performance. (c) 2008 Published by Elsevier Ltd.
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