A Comparative Study of Pyridine-Boron Trifluoride, Pyrazine-(BF3)(2) and Triazine-(BF3)(3) as Electrolyte Additives for Lithium-Ion Cells

作者：Nie Mengyun^*; Xia Jian; Ma Lin; Dahn J R

来源：Journal of the Electrochemical Society, 2015, 162(10): A2066-A2074.

DOI：10.1149/2.0411510jes

The novel electrolyte additives pyridine boron trifluoride, pyrazine di-boron trifluoride and triazine tri-boron trifluoride were compared in Li[Ni1/3Mn1/3Co1/3]O-2/graphite and Li[Ni0.42Mn0.42Co0.16]O-2/graphite pouch cells. This series of additives allowed the Lewis base:BF3 ratio to be systematically varied. The results were compared to baseline experiments on cells with well-known additives such as vinylene carbonate (VC) or prop-1-ene-1,3-sultone (PES). Increasing the BF3 content on the additive can reduce the impedance of cells during charge-discharge cycling. However the coulombic efficiency, charge endpoint capacity slippage and long-term cycling behavior of these pouch cells was not improved by increasing the content of BF3 in the additives.

• 出版日期2015