Wireless Chemical Charging of a Metal-Ion Battery by Magnetic Particles

Abstract

The state-of-the-art battery performance is often limited by the cathode, and consequently, expanding the storage metrics often requires a heavy cathode. Since charge is stored within the bulk of the electrodes in most batteries, energy/power trade-off is one of their classical challenges, and alternative cell chemistries that avoid these drawbacks are highly sought after. We demonstrate an ultra-high-capacity metal-ion battery comprising an acidic aqueous electrolyte with suspended magnetite particles and a hexacyanometallate-based insertion cathode. During discharge, the hexacyanometallate is reversibly reduced, and its original redox state is restored during intermittent periods by wirelessly charging with magnetite particles. Recovery involves sacrificial surface redox of the Fe 3+ / Fe 2+ couple in magnetite particles with the formation of water and re-oxidation of hexacyanometallate. The structural flexibility of the magnetite particles with respect to their oxidation states leads to a high cumulative capacity battery, which offers opportunities for fast and remote charging with minimal power losses.

Simple and direct electrochemical detection of rosmarinic acid in food samples based on nanochannel modified carbon electrode

“…Electrodeposition allows for precise control of the deposition rate and thickness by adjusting the current and voltage, resulting in a uniform deposition layer with a fast growth rate. [46][47][48][49] EASA involves applying a negative voltage or current to the electrode, generating hydroxide ions through electrolysis of water, inducing an in situ pH gradient on the electrode surface, and thereby facilitating the assembly of surfactant micelles and the sol-gel process of the siloxane precursor. This method enables the simple and rapid growth of VMSF.…”

In Situ Growth of Sodium Manganese Hexacyanoferrate on Carbon Nanotubes for High-Performance Sodium-Ion Batteries

“…Renewable energy resources like solar energy and wind energy are abundant in nature; however, their decentralized distribution leads to an intermittent power supply. These challenges could be addressed by integrating energy storage systems [ 1 , 2 ]. Currently, lithium-ion batteries (LIBs) are the predominant electrochemical energy storage system applied for the development of renewable energy [ 3 ].…”

Boosting the electrochromic performance of P-doped WO3 films via electrodeposition for smart window applications

“…10 By chemical vapor deposition, physical vapor deposition, dip- and spin-coating from a liquid phase, hydrothermal synthesis and electrochemical deposition, electrochromic materials are traditionally deposited on transparent conducting layers to fabricate electrochromic layers. 11,12 Among these methods, electrochemical deposition has the benefits of costing less and being easily prepared, and has been applied in energy catalysis, 13 batteries, 14 sensors, 15,16 and so on. The structure could be simply controlled by changing deposition parameters, i.e.…”

“…10 By chemical vapor deposition, physical vapor deposition, dip-and spin-coating from a liquid phase, hydrothermal synthesis and electrochemical deposition, electrochromic materials are traditionally deposited on transparent conducting layers to fabricate electrochromic layers. 11,12 Among these methods, electrochemical deposition has the benets of costing less and being easily prepared, and has been applied in energy catalysis, 13 batteries, 14 sensors, 15,16 and so on. The structure could be simply controlled by changing deposition parameters, i.e., solution composition, electrochemical methods, and applied voltage/current, whereas the electrochromic performance of the lms prepared by electrochemical deposition should be further improved due to the presence of surface defects, such as microcracks, detachment, irregular burrs on the surface and rough surfaces.…”