Crystal morphology evolution of Ni–Co layered double hydroxide nanostructure towards high-performance biotemplate asymmetric supercapacitors

Abstract

Hierarchical three-dimensional (3D) porous structures of nickel–cobalt layered double hydroxide (LDH) are grown on diatomite biotemplate via one-step hydrothermal method.

Design and fabrication of hydrotalcite-like ternary NiMgAl layered double hydroxide nanosheets as battery-type electrodes for high-performance supercapacitors

“…The intersection point between Nyquist plots and x-axis is assigned to solution resistance (R s ), which is related to the intrinsic resistance of the electrolyte. 38,39 The slightly lower slope of Ni 2 MgAl LDH-24 h aer cycling indicates that the cycling process has almost no effect on diffusion process of electrolyte ion. The solution resistance (R s ) increases from 0.95 U to 1.2 U, while the charge transfer resistance (R ct ) increases slightly from 1.1 U to 2.5 U, suggesting excellent cycling stability and durability.…”

Newly Design Porous/Sponge Red Phosphorus@Graphene and Highly Conductive Ni2P Electrode for Asymmetric Solid State Supercapacitive Device With Excellent Performance

“…In recent years, the use of portable electronic devices, including smart phones and laptops, has been considered a desirable approach to the advancement of human life [1,2]. However, an increasing world population and an increasing demand for essential needs may lead to a future energy crisis [1][2][3][4]. To overcome such a challenge, many studies have been conducted to develop novel energy storage devices, including lithium ion batteries, sodium ion batteries, and supercapacitors [1][2][3][4][5].…”

“…However, an increasing world population and an increasing demand for essential needs may lead to a future energy crisis [1][2][3][4]. To overcome such a challenge, many studies have been conducted to develop novel energy storage devices, including lithium ion batteries, sodium ion batteries, and supercapacitors [1][2][3][4][5]. Owing to their higher power densities, fast charge/discharge rates, and longer life span, supercapacitors, which bridge the gap between physical capacitors and batteries, are considered to be promising energy storage devices [6][7][8].…”

“…To obtain supercapacitors with enhanced performance, researchers are devoted to developing/engineering metal oxide, sulfide, and hydroxide nanoparticles, as well as carbonaceous materials that are more suited to and efficient for use in supercapacitors [5,[7][8][9]. Even though numerous studies have been performed to develop high energy and power density supercapacitors controlled by a capacitive electrode, a number of challenges still exist [2][3][4]. The hybrid supercapacitor electrode-based concept, which combines a battery-type and a capacitor-type electrode to achieve high energy and power densities, has been proposed [6][7][8].…”

“…However, mostly p-type semiconductor pseudo-capacitors, which are kinetically unfavorable to the fast electron transport required for high power density delivery, have been used [7][8][9][10]. Consequently, transition metal compounds have received a lot of attention recently, owing to their metalloid properties and excellent electrical conductivities [2,[4][5][6][7][8][9]. Among them, nickel phosphide (Ni 2 P) has attracted the most attention because of its superior electrical conductivity and intrinsic metallic nature, which permit fast electron transfer at the electrode/electrolyte interface [2,[7][8][9][10][11][12][13].…”