Closed LiO₂ batteries consisting of electrolytes derived from molten salt have emerged as attractive energy-storage cells because of their unique oxygen-supply mechanism to form a stable Li₂O discharge product without requiring an oxygen-gas-reservoir. However, the formation of stable Li₂O discharge product increases the overpotential during the charging process, which compromises the cell performance because of the resulting parasitic reaction. In this study, we demonstrate a potent approach to reversibly operate an oxygen-gas-reservoir-free LiO₂ battery by using chemically impregnated nickel oxide (NiO) nanoparticles as a catalyst on the carbon electrode. The efficient bottom-up process for decorating NiO on a carbon material in binary molten electrolyte enables not only to significantly reduce the loading level of the catalyst but also to enhance the electrochemical performance with preventing the detrimental parasitic reaction in the oxygen-gas-reservoir-free LiO₂ cell. In particular, using the in situ gas analysis with electrochemical measurements, the 20 wt% NiO added to the carbon cathode is sufficient to reduce the charging potential without generation of parasitic gas evolution.

封闭的由熔融盐衍生的电解质组成的Li O ₂电池已经成为有吸引力的储能电池，这是因为其独特的供氧机理可以形成稳定的Li ₂ O放电产物，而无需氧气储存器。但是，稳定的Li ₂ O放电产物的形成会在充电过程中增加过电势，由于产生的寄生反应而损害电池性能。在这项研究中，我们证明了一种有效的方法可逆地操作无氧气容器的Li O ₂通过使用化学浸渍的氧化镍（NiO）纳米粒子作为催化剂在碳电极上的电池。在二元熔融电解质中的碳材料上修饰NiO的有效的自下而上的过程，不仅可以显着降低催化剂的负载水平，而且还可以增强电化学性能，同时防止在氧气-气体-容器中产生有害的寄生反应。游离的Li O ₂电池。特别地，使用具有电化学测量的原位气体分析，添加到碳阴极的20 wt％NiO足以降低充电电位而不会产生寄生气体。