The Study Of Preparation And Application About Porous And Nanoporous Copper-based Composite Electrode Materials

In this paper,we utilized general hydrogen bubble template method and magnetron sputtering/dealloying route to fabricate porous copper(PCu)and nanoporous copper(NPCu)thin films on Cu foil substrate,respectively.Through electrochemical deposited MoS2 on porous copper substrate,we constructed PCu/MoS2 composite electrodes as anode materials for lithium-ion batteries.Through in-situ oxidized method,we constructed NPCu/CuO composite electrodes as non-enzymatic glucose sensor materials.Through in-situ replacement method,we constructed NPCu/Pt composite electrodes as catalysts for hydrogen evolution reaction.All of the prepared electrode materials were characterized systematically.According to the experiment results,PCu/MoS2 composite electrodes presented continuous three-dimension structures.The average pore diameter of porous copper was about 17.3μm and pores edges were decorated by copper dendrites.MoS2 were completely wrapped in copper dendrites and presented globular morphology with a size of 1.2μm.Electrochemical measurements were performed using coin-type cells and the PCu/MoS2 delivered a highly reversible capacity of 705.5 mAh g-1 at a current density of 100 mA g-1 after 100 cycles,while Pure Cu/MoS2 only presented 35.4 mAh g-1 reversible capacity.When the charge/discharge current density increased from 100 mA g-1 to 200,500,1000 mA g-1 and returned to 100 mA g-1 the electrodes still owned 567.9 mAh g-1 special capacity.In addition,the electrode materials after charge/discharge were also characterized and discussed.We have systematically studied the influence of single target magnetron sputtering parameters on the thickness and surface particle size of the materials from single metal target.We found that with the increased of sputtering power and sputtering time,the thickness and surface particle size changed linear respectively.Based on different sputtering power match,three-types of Cu77Al23,Cu63Al37 and Cu58Al42 precursors were fabricated,the precursor Cu58Al42 presented the largest special surfaceand 29.7 roughness factorafter dealloying,the average pore size was about 88.8±3.5nm,the intersection still displayed continuous nanoporous structure.The nanoporous structure of NPCu from precursor Cu58AI42 preserved after oxidation,and flower-like CuO were homogeneously distributed on the original NPCu surface.The composite electrodes displayed linear response to glucose up to 10 mM and a detection limit of 1μM.When compared with other materials,the composite electrodes displayed an ideal sensitivity of 362.0μA cm-2 mM-1,remarkable tolerance against interference and good reproducibility.In addition,the response to glucose of composite electrodes in-situ oxidized from other precursors were also discussed.The dealloyed NPCu from precursor Cu63Al37 and Cu58Al42 were used for loading Pt by replacement reaction in chloroplatinic acid solution,the content of loaded Pt in dealloyed Cu58Al42 precursor was higher than dealloyed Cu58Al42 precursor.The pore size of nanoporous structure increased significantly,but the nano-structure still kept robust.We preliminary explored the electrolytic hydrogen production capacity of NPCu/Pt composite electrodes from precursor Cu63Al37,finding it had ideal hydrogen evolution ability.The tafel slope was 36 mV dec-1 and onset potential was almost near to 0 V,which showed relatively significant advantages than pure Cu loading Pt at the same condition and great application values compared with pure Pt and other Pt-based materials.