Structural evolution and sulfuration of nickel cobalt hydroxides from 2D to 1D on 3D diatomite for supercapcitors

Transition metal nickel cobalt hydroxides widely are used as electrode materials for supercapacitors due to its intriguing active components properties. Nevertheless, the aggregation problem and poor electrical conductivity severely hinder...

Effect of precursor ultrasonic treatment on synthesis, texture characteristics and electrical conductivity of NiCo2O4

The high-dispersed powder−precursors of nickel−cobalt spinel (NiCo2O4) was synthesized by the method of coprecipitation of the nickel and cobalt hydroxides with followed by drying (150 °C) and ultrasonic (US) treatment of the precipitate. The influence of US−treatment on the texture characteristics of the precursors and NiCo2O4 powders was established. The possibility of obtaining nanodispersed (crystallite size < 20 nm), mesoporous powders (pore size 3 − 15 nm) of nickel−cobalt spinel at a temperature of 700 °C is shown. The change in the specific electrical conductivity of sintered NiCo2O4 samples in the temperature range of 100 – 800 °C was studied, the value of σ can vary from 0.1 to 7.0 Sm/cm.