The Compatibility of a Boron-Based Anion Receptor with the Carbon Anode in Lithium-Ion Batteries

Xuehui Sun, Hung Sui Lee, Xiao-Qing Yang, James McBreen
2003 Electrochemical and solid-state letters  
The electrochemical stability of the boron anion receptor, tris͑pentafluorophenyl͒ borane ͑TPFPB͒, on a carbonaceous mesocarbon microbeads ͑MCMB͒ electrode and its compatibility with the passivated solid electrolyte interphase ͑SEI͒ layer on the carbon anode were investigated. Comparison of the irreversible capacity loss of the MCMB electrode during initial galvanostatic cycling using electrolyte with and without the TPFPB additive indicates excellent electrochemical stability of TPFPB on the
more » ... y of TPFPB on the carbonaceous electrode. Cyclic voltammetry studies show that the SEI layer on the surface of the carbon electrode can be formed through the decomposition of ethylene carbonate in the presence of TPFPB. Prolonged cycling test verifies the long-term stability of the SEI layer on carbon in the presence of the TPFPB additive. The SEI layer is not dissolved by TPFPB even after heat-treatment under conditions which dissolve LiF salt. This suggested a cross-linked structure for the SEI layer on carbon electrode. A Li-ion cell using an electrolyte containing TPFPB displays better cycling performance than a cell without TPFPB under the same conditions.
doi:10.1149/1.1536475 fatcat:2xgjupnyzjhx3gk5gqwcyqkmqa