Organic rechargeable lithium batteries using anthraquinone-based positive-electrode: the effect of a molecular additive on the cycle-life performance.

Abstract

The performance of 9,10-anthraquinone (AQ) as a cathode-active material for rechargeable lithium batteries and the effect of a mol. additive on its cycle-life stability were investigated. A cathode with AQ showed an initial discharge capacity of >200 mA-h/g AQ with an av. voltage of 2.2 V vs. Li/Li. This discharge capacity corresponds to a quinone-based two-electron redox behavior, and is higher than that of the conventional cathode material, LiCoO2 at 140 mA-h/g. The cycle-life stability of the AQ-based electrode was not acceptable, but the addn. of 1,4-dibutoxybenzene as an additive to the electrolyte soln. was found to improve the cycle-life stability. [on SciFinder(R)]