Boosting the fast electrochemical kinetics of Na₄Fe₃(PO₄)₂(P₂O₇) via a 3D graphene network as a cathode material for potassium-ion batteries

Abstract

The structural deformation during the embedding/de-embedding of K+ with the large ionic size is an important factor limiting the development of potassium-ion batteries (PIBs). The iron-based mixed polyanionic material Na4Fe3(PO4)2(P2O7)...

Potassium energy storage behavior of nickel–zinc co-doped Prussian blue analogs formed by a chelating-agent-assisted route and its application in a K+-proton hybrid-ion aqueous alkaline battery

“…Since the best performances have been achieved in the alkaline media (30% KOH) upon using a carbon anode with the electrochemical hydrogen storage mechanism, 21 in this new HIB approach, the KOH solution is used as the electrolyte, and potassium storage materials are selected as the cathodes. Currently, the primary categories of potassium storage electrode materials are layered compounds, 22,23 polyanionic cathode materials, 24 and Prussian blue analogs (PBAs). 25…”

Entropy-Driven Enhancement of the Conductivity and Phase Purity of Na4Fe3(PO4)2P2O7 as the Superior Cathode in Sodium-Ion Batteries

“…To ameliorate the poor electrochemical performance of NFPP, a great deal of effort has been made, including carbon coating, metal doping, defect management, and entropic manipulation methods . For example, the carbon coating method was reported to improve the electronic conductivity extensively; − however, the NFPP coated with amorphous carbon through conventional thermal decomposition of organic compounds still suffered low conductivity due to the inactive carbon inside the structure. Mg doping exhibited improved electrochemical kinetics, a high rate, and long cycle performance; however, the issue associated with the pollution of the impure phase still threatens the product quality during the manufacturing process.…”

Rapid Microwave Hydrothermal Synthesis of NiCoMo Sulfide Nanosheet Arrays for Hybrid Supercapacitors

“…The swift advancement of green and renewable energy conversion and storage technologies plays a pivotal role in addressing the challenges associated with fossil fuel consumption and environmental degradation. − In recent times, supercapacitors have garnered tremendous interest among electrochemical devices used for storing energy, owing to the remarkable speed of charging and discharging they offer, their high efficiency, eco-friendliness, capacity to function over a broad temperature spectrum, long cycle life, and reliable safety features. , The fundamental categories of supercapacitors have been defined based on the electrode materials used to store energy: electric double-layer capacitors made using carbon electrodes, pseudocapacitors composed of compounds based on transition metals, and hybrid supercapacitors (HSCs). − A supercapacitor typically comprises positive and negative electrodes, separators, and electrolytes. Developing and synthesizing novel materials for electrodes with enhanced electrochemical efficiency is a direct and practical approach to enhance the storage of energy for these devices.…”