Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 11, Issue 12, Pages 2296-2299Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2009.10.015
Keywords
Pentafluorophenylboron oxalate; Boron-based anion receptors; Solid electrolyte interphase; Propylene carbonate; Lithium fluoride; Lithium oxide; Lithium peroxide; Non-aqueous electrolyte
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Funding
- Nature Scientific Foundation of China [50672122, 50730005]
- 863 project of China [2006AA03Z346]
- 973 project of China [2007CB936501]
- US Department of Energy [DEAC02-98CH10886]
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A novel compound named pentafluorophenyl boron oxalate (PFPBO) has been synthesized. PFPBO has a unique molecular structure containing a boron atom center with electron deficiency and an oxalate group. It is found that when PFPBO is used as additive, the solubility of lithium fluoride (LiF) or lithium oxide (Li2O, Li2O2) in propylene carbonate (PC) and dimethyl carbonate (DMC) solvents can be increased dramatically. The new electrolytes show high ionic conductivity, high lithium ion transference number and good compatibility with LiMn2O4 cathode and MCMB anode. PFPBO was synthesized with the designed structure to act as a bi-functional additive: boron-based anion receptor (BBAR) additive and stable solid electrolyte interphase (SEI) formation additive in PC-based electrolytes. The results show it does possess these two desired functionalities. (C) 2009 Elsevier B.V. All rights reserved.
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