锂硫电池过渡金属氧化物/碳/硫正极

提出了由金属-有机骨架材料（MOF）衍生的菱形十二面体NiO-NiCo₂O₄空心多面体结构包覆还原氧化石墨烯（rGO）作为硫载体的设计方案，极性金属氧化物可以有效吸附多硫化物，抑制穿梭效应，空心结构可以有效缓解电极反应过程中的体积变化，rGO的引入可有效提高电极材料的电导率，促进正极硫的充分反应，进而提高硫的利用率，提高电极材料的电化学性能。在0.5 C电流密度下，S/NiO-NiCo₂O₄-rGO复合材料循环100次后放电比容量为591mAh/g，在1 C电流密度下，S/NiO-NiCo₂O₄-rGO复合材料循环300次后放电比容量为365 mAh/g，较S/C电极有较大提升，同时该材料还具有优异的倍率性能。

Transition metal oxide/carbon/sulfur cathode for lithium sulfur battery

The design of a rhombic dodecahedral NiO-NiCo₂O₄ hollow structure derived from MOF coated with rGO as sulfur carrier was proposed.The polar metal oxides can effectively adsorb polysulfides and inhibit the shuttle effect.The hollow structure can alleviate the volume change during the electrode reaction.The introduction of rGO can improve the conductivity of the electrode,promote the reaction of sulfur in the cathode,and improve the utilization of sulfur and the electrochemical performance.The S/NiO-NiCo₂O₄-rGO composite materials achieve the discharge specific capacity of 591 mAh/g at 0.5 C after 100 cycles and 365 mAh/g at 1 C after 300 cycles,and the composite materials possess excellent rate performance.