Nickel Based Electrospun Materials with Tuned Morphology and Composition

Abstract

Nickel is set to play a crucial role to substitute the less-abundant platinum in clean electrochemical energy conversion and storage devices and catalysis. The controlled design of Ni nanomaterials is essential to fine-tune their properties to match these applications. A systematic study of electrospinning and thermal post-treatment parameters has been performed to synthesize Ni materials and tune their morphology (fibers, ribbons, and sponge-like structures) and composition (metallic Ni, NiO, Ni/C, Ni3N and their combinations). The obtained Ni-based spun materials have been characterized by scanning and transmission electron microscopy, X-ray diffraction and thermogravimetric analysis. The possibility of upscaling and the versatility of electrospinning open the way to large-scale production of Ni nanostructures, as well as bi- and multi-metal systems for widened applications.

Single-Step Electrospun Ir/IrO2 Nanofibrous Structures Decorated with Au Nanoparticles for Highly Catalytic Oxygen Evolution Reaction

“…Then, this tubelike skin is collapsed under unbalanced lateral stress around the jet, producing a flattened ribbon structure. On the contrary, with a lower solvent evaporation rate, the solid skin forms slowly and evenly and therefore more cylindrical jet formation is favorable …”

“…On the contrary, with a lower solvent evaporation rate, the solid skin forms slowly and evenly and therefore more cylindrical jet formation is favorable. 32 Since the boiling point of ethanol (78 °C) is much lower than that of DMF (153 °C), the solvent evaporation rate becomes higher with increasing content of ethanol in the electrospinning solution. Thus, the flattened nanoribbon structure of IrO y -70 can be attributed to the higher solvent evaporation rate of its electrospinning solution than IrO y -50 nanofibers.…”

Preparation of polycrystalline tungsten nanofibers by needleless electrospinning

“…Platinum [60][61][62][63][64] and copper [65,66] metal nanofibers are well described in multiple morphologies, including their alloys with various metals [63,64]. Iron [67,68], cobalt [67,68], and nickel [68,69] nanofibers are preferentially studied for their magnetic properties. The primary preparation strategy is based on the reduction of corresponding metal oxides in a hydrogen atmosphere.…”

Influence of Solution Properties and Process Parameters on the Formation and Morphology of YSZ and NiO Ceramic Nanofibers by Electrospinning

“…The results of the experiments in which the polymer concentration was varied were in good accordance with a model reported by Shenoy et al, which was used to calculate the optimal polymer concentration for electrospinning [ 30 ]. Good results for NiO have also been obtained with acetylacetone or N , N -dimethyl formamide as solvents and/or complexing agents [ 31 , 32 ].…”