Synthesis of NiO Nano Octahedron Aggregates as High-Performance Anode Materials for Lithium Ion Batteries

Hierarchical NiO nanobelt film array as an anode for lithium-ion batteries with enhanced electrochemical performance

“…This performance of the NiO nanobelt lm array is superior to that obtained in previous reports, as shown in Table 1. 26,[33][34][35][36][37][38][39][40] The specic capacity continuously increased due to the constant activation of active material and the reversible generation of a polymeric gel-like layer originating from kinetic activation in the electrode, 41,42 which is characteristic for anode materials. For the NiO powder nanoparticles, the discharge and charge capacity quickly decreased to only 440.1 mA h g À1 and 401.3 mA h g À1 , respectively, aer 70 cycles at the corresponding 0.2C rate, which was due to the particle structure suffering severe damage, suggesting that the NiO nanobelt lm array structure is more benecial for ion transport and contact between electrode and electrolyte interface because of its superior geometric characteristics.…”

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“…These results demonstrated that the cubic phase was decreased by increasing the temperature. The size of nanoparticles can be calculated based on the Scherer Equation (1) [31] according to the full width at half maximum (FWHM) of the strongest peak. The (104) and (222) planes were selected to calculate the crystal sizes of rhombohedral and cubic phases, respectively.…”

“…In recent years, there has been an increasing interest in the preparation, characterization and application consideration of various transition metal oxides including NiO [1], CuO/Cu2O [2], Mn3O4 [3], Co3O4 [4], and Fe3O4 [5,6] and Fe2O3 [7⎼9], not only for morphological diversity but also for good properties and applications. For these reasons, several research groups worked on this subject and annually published a fair number of papers [1⎼9].…”

Synthesis of uniform porous NiO nanotetrahedra and their excellent gas-sensing performance toward formaldehyde

“…The morphology of NiO nanostructures were mainly focused on nanosheets, 18,20 owerlike microspheres, 12,21-23 nanoparticles, 16 nanotubes, 14 nanowires, 24 nanobers, 17,25 nanocrystalline thin lms, 26,27 and polyhedral nanoparticles. [28][29][30] From the viewpoint of gas sensor, nanostructures with high specic surface area and porous structure are advantageous for improving the gas-sensing performance. To the best of our knowledge, although several NiO polyhedra including sophisticated concave polyhedra, 28 nanooctahedron aggregates, 29 and hollow octahedral NiO 30 have been reported, there have been no reports on the synthesis and properties investigation of tetrahedral NiO nanoparticles.…”

“…[28][29][30] From the viewpoint of gas sensor, nanostructures with high specic surface area and porous structure are advantageous for improving the gas-sensing performance. To the best of our knowledge, although several NiO polyhedra including sophisticated concave polyhedra, 28 nanooctahedron aggregates, 29 and hollow octahedral NiO 30 have been reported, there have been no reports on the synthesis and properties investigation of tetrahedral NiO nanoparticles. In addition, the gas-sensing property investigation of p-type NiO nanomaterials was mainly focused on ethanol, 14 H 2 , 15 CO, 16 NO 2 , 8,16 NH 3 , 17 formaldehyde, 18 and acetone.…”