Abstract Layered molybdenum disulfide (MoS2) is a promising candidate of electrode material for supercapacitors due to its intercalation chemistry and high theoretical capacitance, but still suffers limited practical performances arising from the low electroactive area and sluggish charge transfer kinetics. Herein, we report the few-layered MoS2 nanosheets hybridizing with reduced graphene oxide (MoS2/rGO) which present high specific capacitance of 361 F g−1 at 5 mV s−1, good rate capability and long-life stability in 1.0 mol L−1 H2SO4. The symmetric supercapacitor exhibits high energy density of 23.0 Wh kg−1@0.37 kW kg−1 and 5.2 Wh kg−1@62.0 kW kg−1, along with high cyclability. The excellent electrochemical performance is attributed to the much improved conductivity, active sites and redox kinetics owing to the hybridization, which leads to the predominant capacitive behavior as demonstrated by the detailed analysis on the charge transfer kinetics. This study demonstrates a simple strategy to develop hybrid electrodes of layered materials and nanocarbons for high-efficient energy storage.

中文翻译：

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超薄二硫化钼纳米片与还原氧化石墨烯杂交用于高性能赝电容器

摘要 层状二硫化钼（MoS2）由于其插层化学性质和高理论电容而成为一种很有前途的超级电容器电极材料候选材料，但由于电活性面积低和电荷转移动力学缓慢，实际性能仍然有限。在此，我们报告了与还原氧化石墨烯 (MoS2/rGO) 杂交的少层 MoS2 纳米片，其在 5 mV s-1 下具有 361 F g-1 的高比电容、良好的倍率性能和 1.0 mol L 的长寿命稳定性-1 H2SO4。对称超级电容器表现出 23.0 Wh kg-1@0.37 kW kg-1 和 5.2 Wh kg-1@62.0 kW kg-1 的高能量密度，以及高循环性。优异的电化学性能归因于由于杂化而大大改善的电导率、活性位点和氧化还原动力学，这导致了主要的电容行为，如对电荷转移动力学的详细分析所证明的。这项研究展示了一种开发用于高效储能的层状材料和纳米碳混合电极的简单策略。