Stabilized Lithium Metal Powder (SLMP�) from FMC was used to pre-lithiate free-standing silicon-carbon nanotube (Si-CNT) anodes for lithium ion batteries, which reduces the amount of irreversible first cycle capacity loss that typically occurs.  SLMP� was applied to the Si-CNT anodes by inertly drop-casting an SLMP�/toluene suspension.  After toluene evaporation, pre-lithiated Si-CNT anodes are paired with NCA cathodes and assembled into coin cells.  Improved discharge capacities are achieved with SLMP� pre-lithiated anodes, due to a decrease in the first cycle loss.  Consideration for the effect of extended �conditioning� time between cell assembly and cell testing motivates further optimization of the SLMP� pre-lithiation process.  Cycling at a 40% depth-of-discharge, NCA/Si-CNT coin cells have shown stable cycling up to 100 cycles with negligible fade.  These results are important to the field, because reductions in first cycle loss and good cycling performance are critical for the implementation of Si-CNT anodes.

Pre-lithiation of silicon-carbon nanotube anodes using stabilized lithium metal powder

245th National Meeting (2013)

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