Effect of added LiBOB on high voltage (LiNi 0.5Mn 1.5O 4) spinel cathodes
Date of Original Version
Lithium bis(oxalato)borate (LiBOB) was investigated as an additive to improve the performance of LiNi 0.5Mn 1.5O 4 cathodes cycled to high voltage (4.9 V vs Li). Incorporation of low concentrations of LiBOB (0.25-1.0%, wt) results in a significant improvement in the capacity retention and cycling efficiency of LiNi 0.5Mn 1.5O 4/Li cells. Electrochemical impedance spectroscopy indicates that the addition of LiBOB decreases cell impedance. Ex-situ surface analysis of cycled cells suggests that the cathode surface films are thinner in cells cycled with added LiBOB. The addition of LiBOB inhibits detrimental reactions of the electrolyte with the surface of LiNi 0.5Mn 1.5O 4 cathodes at high voltage. © 2011 The Electrochemical Society.
Electrochemical and Solid-State Letters
Dalavi, Swapnil, Mengqing Xu, Brandon Knight, and Brett L. Lucht. "Effect of added LiBOB on high voltage (LiNi 0.5Mn 1.5O 4) spinel cathodes." Electrochemical and Solid-State Letters 15, 2 (2012). doi:10.1149/2.015202esl.