Recent development of metal hydroxides as electrode material of electrochemical capacitors

Abstract

Recent research on electrochemical capacitors using transition metal hydroxides as electrode materials is reviewed.

Nickel–cobalt hydroxide nanoflakes conformal coating on carbon nanotubes as a supercapacitive material with high-rate capability

“…Recent years, considerable efforts have been devoted to the exploration of high-performance electrode materials [1,2]. Specific capacitance, rate capabilities and cycling stability are the very important parameters to estimate the supercapacitive performance of an electrode material.…”

Periodic stacking of 2D charged sheets: Self-assembled superlattice of Ni–Al layered double hydroxide (LDH) and reduced graphene oxide

“…7 However, the achieved capacity of LDHs is often far below (1/10 ~ 1/5) its theoretical capacity due to poor electronic conductivity. [8][9][10][11][12] Coupling a single layer of LDH with a single layer of conductive atomic sheet can be an ideal way to facilitate the transfer of electrons and ions. Unlike van der Waals heterostructures, LDH layers are positively charged, and thus have stronger interactions of electrostatic nature.…”

Flexible all-solid-state micro-supercapacitor based on Ni fiber electrode coated with MnO2 and reduced graphene oxide via electrochemical deposition

“…As one kind of important devices for energy storage, supercapacitors (SCs, also named electrochemical capacitors) can operate at a high charge/discharge rate over a large number of cycles, bridging the gap between high energy batteries and high power conventional electrostatic capacitors [1,2]. Generally, SCs can be divided into two major categories according to the energy storage mechanism.…”