A forest geotexture-inspired ZnO@Ni/Co layered double hydroxide-based device with superior electrochromic and energy storage performance

Abstract

The high-performance bi-functional electrochromic supercapacitor constitutes the critical technology for intelligent energy conversion and storage. Facilitating ion/electron transport and intercalation/deintercalation by rational design of the highly porous structure with a...

Crystalline phase transformation of Co-MOF derivatives on ordered mesoporous carbons for high-performance supercapacitor applications

“…6b), indicating that SAC@NiCoP is a mix-type energy storage mechanism. The capacitance contribution ratio is obtained using the following formula: 31 I / v 0.5 = k 1 v 0.5 + k 2 where I is the current at different points on the CV curves, k 1 and k 2 are the alterable factors, and k 1 v and k 2 v 0.5 represent the capacitance derived from surface-controlled and diffusion-controlled processes; the corresponding fitting curves are shown in Fig. 6c–e.…”

Atomic Scale Optimization Strategy of Al-Based Layered Double Hydroxide for Alkali Stability and Supercapacitors

“…According to Figure 6 b, the b -value of Ni 2 Co 1 S 4 from anodic and cathodic peaks are 0.66937 and 0.77223, respectively, suggesting that both surface capacitance effect and diffusion-controlled capacitance dominate the electrochemical reaction. The detailed capacitance contribution ratio can be calculated from the following formula [ 25 ]: where I (A) represents the current at the fixed potential, and k 1 and k 2 are the constants. k 1 v and k 2 v 0.5 represent the charge stored mechanism by the surface capacitance effect and diffusion-controlled capacitance effect.…”

Progress of layered double hydroxide-based materials for supercapacitors

“…However, challenges such as unsatisfactory energy storage exist due to the simplicity of the porous structure and severe performance degradation during long-term electrochemical cycling occurs. Inspired by the natural geographical structure of forests, Liu et al 216 designed Ni/Co-LDHs on a metal-organic framework of ZnO nanotubes grown on transparent conducting substrates with different porous structures to simulate a ''rock-soil-tree-leaf'' system (Fig. 14(a)).…”