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

Abstract

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...

Constructing Crystalline NiCoP@Amorphous Nickel–Cobalt Boride Core–Shell Nanospheres with Enhanced Rate Capability for Aqueous Supercapacitors and Rechargeable Zn-Based Batteries

“…) , and non-metal-ion charge carriers, for example, proton (H + ), hydroxide ions (OH – ), halides (F – and Cl – ), and non-metallic ammonium (NH 4+ ) ions, with substantial merits of low cost, intrinsic flame-retardant ability, and high operational safety, have been widely deemed as the most ideal candidates for grid-scale electrochemical energy storage. Among the numerous aqueous energy storage devices, aqueous asymmetric supercapacitors (ASCs) employ battery-type materials as the cathode and capacitor-type materials as the anode, which can effectively extend the operating voltage window, showing the enhancement of energy density. − Moreover, the rechargeable aqueous alkaline Zn-based batteries (e.g., P–NiCo 2 O 4– x //Zn, S–NiCoP//Zn, and Mo–NiS 2 @NiCo-LDH//Zn batteries) are fabricated via employing high-performance electrode material as the cathode and stripping/plating-type metal (Zn) as the anode, which can adopt reversible faradaic reactions to realize energy storage in an aqueous alkaline electrolyte, resulting in higher operating voltage (∼1.75 V) and a relatively high energy/power density . Therefore, research interests and achievements in the exploration of novel cathode materials for ASCs and alkaline Zn-based batteries have surged over the past year.…”

N‐doped Nanocarbon Inserted NiCo‐LDH Nanoplates on NF with High OER/ORR Performances for Zinc‐Air Battery

“…The appropriate way for building bifunctional catalysts is generally to incorporate carbon with transition metal materials [30–33] . By the synergistic combination of ORR active carbon with high conductivity and OER active transition metal‐based materials with rich catalytic sites, bifunctional ORR/OER catalysts can be prepared [34,35] . Because of the scarcity of defective sites on the carbon nanosheets and their agglomeration from the π‐π stacking, the prepared nanocomposites face the issues of low catalytic activity and poor durability, which is a challenge to further improve the ORR/OER performance.…”

Polypyrrole-Derived Carbon Coated NiCoMn Layered Double Hydroxides for High-Performance Supercapacitors

“…The progress of renewable energy and energy storage technologies to adapt to a carbon neutrality green economy has been influenced by the environmental issues and energy scarcity issues brought on by the large-scale burning of fossil fuels. , Supercapacitors have garnered significant interest from both the academic and business sectors owing to their remarkable power density, prolonged cycle lifespan, stability, and safety, making them a noteworthy energy storage option. − The electrochemical performance of supercapacitors can make up for many defects of batteries in general, − such as high manufacturing cost, short service time and environmental pollution, meanwhile filling the gap between traditional planar shunt capacitors and batteries. , Supercapacitors are known to be made mostly of carbon materials, transition metal oxides, and hydroxides. , Yet, those materials’ fatal shortcomings (including low specific capacitance, low conductivity, and poor stability) impeded their practical applications. Thus, exploring excellent electrode materials with outstanding electrochemical performances is urgent.…”