Performance improvement of liquid phase plasma processed carbon blacks electrode in lithium ion battery applications

Abstract

Cyclic stability of carbon blacks as an anode electrode in lithium ion batteries was studied using commercial (SP & KB) and synthesized (SC) ones. SC was processed by liquid phase plasma process. The cyclic stability was found to be affected with the presence of solid electrolyte interface(SEI). Unlike the commercial carbon blacks in which SEI formed at early stage of charge-discharge cycles, SC showed a gradual formation of SEI with the cycles. The SEI formation was confirmed by the trace of resistance changes with the impedance measurements. SP was observed to have the best charge-discharge cyclic stability. Meanwhile, the capacity of SC was gradually decreased with the cycle until the formation of SEI even though it had higher capacity than the commercial ones through the measurement cycles of up to 50. The cyclic stability of SC carbon blacks was greatly improved by mixing with SP with a slight sacrifice of capacity.