Highly porous NiCo2O4 Nanoflakes and nanobelts as anode materials for lithium-ion batteries with excellent rate capability

Surfactant-assisted solvothermal synthesis of NiCo2O4 as an anode for lithium-ion batteries

The as-prepared NiCo₂O₄ nanoparticles through microemulsion-solvothermal growth and subsequent calcination in air exhibits excellent rate performance and cyclic stability.

Hierarchical flower-like NiCo2O4@TiO2hetero-nanosheets as anodes for lithium ion batteries

Flower-like NiCo₂O₄consisting of nanosheets are synthesized by hydrothermal technique and subsequently surface-modified with a TiO₂ultrathin layer by a hydrolysis process at low temperature.

Uniform Nickel Vanadate (Ni3V2O8) Nanowire Arrays Organized by Ultrathin Nanosheets with Enhanced Lithium Storage Properties

Development of three-dimensional nano-architectures on current collectors has emerged as an effective strategy for enhancing rate capability and cycling stability of the electrodes. Herein, a novel type of Ni₃V₂O₈ nanowires, organized by ultrathin hierarchical nanosheets (less than 5 nm) on Ti foil, has been obtained by a two-step hydrothermal synthesis method. Studies on structural and thermal properties of the as-prepared Ni₃V₂O₈ nanowire arrays are carried out and their morphology has changed obviously in the following heat treatment at 300 and 500 °C. As an electrode material for lithium ion batteries, the unique configuration of Ni₃V₂O₈ nanowires presents enhanced capacitance, satisfying rate capability and good cycling stability. The reversible capacity of the as-prepared Ni₃V₂O₈ nanowire arrays reaches 969.72 mAh·g⁻¹ with a coulombic efficiency over 99% at 500 mA·g⁻¹ after 500 cycles.

Designed Functional Systems for High-Performance Lithium-Ion Batteries Anode: From Solid to Hollow, and to Core-Shell NiCo2O4 Nanoparticles Encapsulated in Ultrathin Carbon Nanosheets

Binary metal oxides have been considered as ideal and promising anode materials, which can ameliorate and enhance the electrochemical performances of the single metal oxides, such as electronic conductivity, reversible capacity, and structural stability. In this research, we report a rational method to synthesize some novel sandwich-like NiCo2O4@C nanosheets arrays for the first time. The nanostructures exhibit the unique features of solid, hollow, and even core-shell NiCo2O4 nanoparticles encapsulated inside and a graphitized carbon layers coating outside. Compared to the previous reports, these composites demonstrate more excellent electrochemical performances, including superior rate capability and excellent cycling capacity. Therefore, the final conclusion would be given that these multifarious sandwich-like NiCo2O4@C composites could be highly qualified candidates for lithium-ion battery anodes in some special field, in which good capability and high capacity are urgently required.

The design and synthesis of porous NiCo2O4 ellipsoids supported by flexile carbon nanotubes with enhanced lithium-storage properties for lithium-ion batteries

The as-prepared 3D porous NiCo₂O₄ ellipsoids supported by flexile carbon nanotubes nanowire arrays show high reversible capacity, excellent cycling stability, and good rate capability when used as an anode material for LIBs.

Facile synthesis of 3D plum candy-like ZnCo2O4 microspheres as a high-performance anode for lithium ion batteries

We have demonstrated a facile method to prepared 3D plum candy-like ZnCo₂O₄ microspheres using an ultrasonic spray pyrolysis technology.

An overview of AB2O4- and A2BO4-structured negative electrodes for advanced Li-ion batteries

Energy-storage devices are state-of-the-art devices with many potential technical and domestic applications.

Design and synthesis of hollow NiCo2O4 nanoboxes as anodes for lithium-ion and sodium-ion batteries

This work is about the synthesis of hollow NiCo₂O₄ nanoboxes and their electrochemical performance for LIBs and SIBs.

Electrodeposition of spinel MnCo₂O₄ nanosheets for supercapacitor applications

Herein, we report a facile, low-cost and one-step electrodeposition approach for the synthesis MnCo2O4 (MCO) nanosheet arrays on indium doped tin oxide (ITO) coated glass substrates. The crystalline phase and morphology of the materials are studied by x-ray diffraction, energy dispersive x-ray analysis and field-emission scanning electron microscopy. The supercapacitor performance of the MCO nanosheets are studied in a three-electrode configuration in 2 M KOH electrolyte. The as-prepared binder-free electrode shows a high specific capacitance of 290 F g(-1) at 1 mV s(-1) with excellent cyclic stability even after 1000 charge/discharge cycles. The obtained energy density and power density of the MCO nanosheets are 10.04 Wh kg(-1) and 5.2 kW kg(-1) respectively. The superior electrochemical performances are mainly attributed to its nanosheet like structure which provides a large reaction surface area, and fast ion and electron transfer rate.

Solvent-Controlled Synthesis of NiO-CoO/Carbon Fiber Nanobrushes with Different Densities and Their Excellent Properties for Lithium Ion Storage

NiO-CoO nanoneedles are grown on carbon fibers by a solvothermal strategy to form nanobrushes. The density of nanobrushes can be easily controlled by altering the solvents. The synthesis mechanism of NiO-CoO/carbon fiber nanobrushes is investigated by the time-dependent experiments in detail. As anodes for lithium ion batteries, the NiO-CoO/carbon fiber nanobrushes synthesized in ethanol show excellent properties with a discharge capacity of 801 mA h g(-1) after 200 cycles at a current density of 200 mA g(-1). The improvement can be ascribed to the carbon fibers as the highway for electrons and the interspace between NiO-CoO nanoneedles to accommodate the volume change and maintain the structural stability.

PSA modified 3 D flower-like NiCo2O4 nanorod clusters as anode materials for lithium ion batteries

3 D flower-like NiCo₂O₄ nanorod clusters as anode materials for lithium ion batteries exhibit excellent electrochemical performance.

Hierarchical NiCo2O4 nanowire arrays on Ni foam as an anode for lithium-ion batteries

A facile two-step method is developed for large-scale growth of hierarchical mesoporous NiCo₂O₄ nanowire arrays on Ni foam with robust adhesion as a high performance electrode for lithium-ion batteries (LIBs).

Hierarchical NiCo2S4 hollow spheres as a high performance anode for lithium ion batteries

Hierarchical NiCo₂S₄ hollow spheres have been fabricated, which exhibit a high specific capacity, good rate capability and stable cycling performance.

High capacity and exceptional cycling stability of ternary metal sulfide nanorods as Li ion battery anodes

Ternary spinel NiCo₂S₄ nanorods demonstrate high specific capacity and outstanding cycling stability as Li ion battery anodes due to restriction of a polymeric gel passivation layer by the CMC–PAA composite binder.

Controllable growth of NiCo2O4 nanoarrays on carbon fiber cloth and its anodic performance for lithium-ion batteries

NiCo₂O₄/CFC anodes coated with different thicknesses of NiCo₂O₄ were fabricated to investigate the role of the CFC substrate.