Toward the Design of High‐performance Supercapacitors by Prussian Blue, its Analogues and their Derivatives

Abstract

Supercapacitors (SCs) with high power output have attracted increasing attention as efficient and environmentally friendly energy storage devices. Prussian blue and its analogues (PB/PBAs) are simple coordination polymers with tunable chemical compositions and open framework. Prussian blue can act as electrode materials in its pristine form and has also been utilized to derive various metallic nanostructures for electrochemical applications due to their simple fabrication process, non‐toxic characteristics, and low price. Here, we firstly describe the charge storage mechanisms of SCs briefly followed by an introduction of the fabrication methods of PB/PBAs and their derivatives. Then, a comprehensive review on recent studies of the use of PB/PBAs and their derivatives as the electrode materials for SCs are given with a focus on strategies to improve their electrochemical performances. Finally, we discuss critical challenges in this research area and propose some general ideas for future research.

Efficient PEDOT Electrode Architecture for Continuous Redox-Flow Desalination

“…Upon optimization of PEDOT electrodes grown with different cycles, the electrocatalytic activity is enhanced. Since the PEDOT increased the capacitive behavior, the electrochemically active surface reaction induces the redox reaction of the [Fe­(CN 6 )] 3/4– species ,− (Figure S2a). The electrocatalytic activity is gradually increased for the PEDOT samples prepared at 5, 10, and 15 cycles.…”

Polygonal CuS Nanoprisms Fabricated by Grinding Reaction for Advanced Quasi-Solid-State Asymmetry Supercapacitors

“…A high specific surface area, an abundant channel, and a suitable pore size are considered as crucial indicators to the outstanding electrochemical performance because of their effect on increasing the contact between the electrode surface and electrolyte. Recently, the Prussian blue analogue (PBA) has attracted extensive attention because of its unique coordination framework, high specific surface area, adjustable pore structure, and diverse composition. − These properties render PBA excellent electrochemical energy storage performance in the positive potential region. − Besides, the diversity of external ions in the complexes endows PBA with diverse valence states and adjustable redox potentials. Therefore, using PBA as a precursor, numerous PBA-derived TMSs have been synthesized with a high specific surface area and a porous structure .…”

“…Recently, the Prussian blue analogue (PBA) has attracted extensive attention because of its unique coordination framework, high specific surface area, adjustable pore structure, and diverse composition. − These properties render PBA excellent electrochemical energy storage performance in the positive potential region. − Besides, the diversity of external ions in the complexes endows PBA with diverse valence states and adjustable redox potentials. Therefore, using PBA as a precursor, numerous PBA-derived TMSs have been synthesized with a high specific surface area and a porous structure . Among these TMSs, CuS has attracted significant attention because of its high conductivity and electrochemical performance.…”

Lattice water removal from nickel–cobalt Prussian blue analogues by polyaniline coating for flexible sodium ion supercapacitor devices

“…Prussian blue (PB) has been applied in sodium ion supercapacitor devices extensively due to its special open frame structure and tunability. [1][2][3][4] With the continuous development of human society and technology, new flexible Prussian blue supercapacitors are proposed and produced for fast growing wearable field. The flexible electrodes, such as sponge, 5 graphene, 6 and carbon fiber, 7,8 work well in bent and compressed state.…”