Abstract
The effect of lithium titanate doping by erbium on reversible lithium insertion in a widened potential range (3.00 to 0.01 V vs Li/Li+) was studied for the first time. Er-doped lithium titanate was manufactured with high-temperature solid-state synthesis. Er-doping (as doping with other lanthanides) was found to allow rather stable cycling in a wide potential range, discharge capacity being depended on the dopant content and is maximal at 2% Er. Upon discharge at 12 C the specific capacity amounted to 71 mAh/g, which is higher than that for other rare-earth dopants.
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