Journal
JOURNAL OF POWER SOURCES
Volume 244, Issue -, Pages 499-504Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2013.03.139
Keywords
Li-ion battery; Overcharge protection; Electro-polymerization; Surface film; Additive
Funding
- National Natural Science Foundation of China [21003054, U1134002]
- Natural Science Foundation of Guangdong [U1134002]
- Natural Science Foundation of Guangdong Province [10351063101000001, S2011040001731]
- Specialized Research Fund for the Doctoral Program of Higher Education [20104407120008]
Ask authors/readers for more resources
The electrochemical properties and working mechanisms of dimethoxydiphenylsilane (DDS) as an electrolyte additive for overcharge protection of lithium ion batteries have been investigated by microelectrode cyclic voltammetry, galvanostatic charge-discharge cycling, and SEM observation on both the cathode and separator of the overcharged cells. DDS can be electrochemically polymerized when the cell was overcharged to 4.9 V (vs. Li/Li+), resulting in a polymer layer on the electrode and the separator, which increases the internal resistance of the cell and postpones the voltage rising up during the overcharge process. Therefore, the safety issue of lithium-ion batteries during overcharge state can be significantly improved by utilization of DDS. Furthermore, incorporation of DDS does not significantly degrade the performance of the cell as there is only a small capacity loss during the normal charge-discharge process. Crown Copyright (C) 2013 Published by Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available