Abstract
The charge‐discharge behavior of a lithium metal anode in propylene carbonate (PC) electrolyte containing added was investigated using in situ ac impedance measurements during galvanostatic cycling. In PC electrolyte with , the anode's cycle life was twice as long and its charge transfer resistance was smaller than in the same electrolyte without . These enhancements are observed only when lithium is electrodeposited in the presence of on nickel substrate; the enhancement does not occur when lithium is deposited without and is cycled with . Even large amounts of in the electrolyte during cycling do not adversely affect the cycle life enhancement by . The enhancement seems to be due to products formed by reaction of lithium with on the electrodeposited lithium surface.
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