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Reduced graphene oxide/CoS2 porous nanoparticle hybrid electrode material for supercapacitor application

机译：用于超级电容器应用的石墨烯氧化物/ COS2多孔纳米颗粒混合电极材料

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摘要

Graphene/transition metal hybrid electrode materials are considered promising electrode materials for supercapacitor applications. However, the stacking of graphene sheets and agglomeration of transition metal parts are still challenging issues to overcome in order to achieve the expected theoretical performances. Herein, a reduced graphene oxide/cobalt disulphide porous nanoparticle hybrid electrode material is fabricated using sulphur as the template precursor. The unique porosity derived from the sulphur template gives favourable open structures for easy diffusion of electrolyte ions and better accessible active sites, and free space for volume changes and results in improved electrochemical performance. In this hybrid material the graphene layers serve as a conductive matrix and physical support for pours cobalt sulphide nanoparticles. On the other hand, the porous cobalt sulphide redox-active material uniformly decorated on rGO can enhance the pseudocapacitive performance of the as synthesized hybrid material. Using the combined advantage of graphene and transition metal sulphide the as synthesized composite electrode material has excellent specific capacitance, excellent rate capability and cycling stability. Thus, our design approach can be considered as a potential candidate to design advanced energy storage devices.
机译：石墨烯/过渡金属混合电极材料被认为是超级电容器应用的有希望的电极材料。然而，堆叠过渡金属部件的石墨烯片和聚集仍然是克服的问题，以达到预期的理论性能。在此，使用硫作为模板前体制造还原的氧化石墨烯/钴多孔多孔纳米颗粒混合电极材料。源自硫模板的独特孔隙率为良好的开放结构提供了良好的开放结构，以便容易地扩散电解质离子和更好的可接近的活性位点，并且对体积变化的可自由空间并导致改善的电化学性能。在该杂化材料中，石墨烯层用作导电基质和倒入硫化钴纳米颗粒的物理载体。另一方面，在RGO上均匀地装饰的多孔钴硫化铜氧化还原活性材料可以增强作为合成的杂化材料的假偶数性能。使用石墨烯和过渡金属硫化物的组合优点作为合成的复合电极材料具有优异的特定电容，优异的速率能力和循环稳定性。因此，我们的设计方法可以被视为设计高级能量存储设备的潜在候选者。

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