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Publication

Sodium chromium hexacyanoferrate as a potential cathode material for aqueous sodium-ion batteries

Hubert Girault, Emad Oveisi, Dominika Baster, Pierre Mettraux
2019
Journal Articles

Abstract

Sodium chromium hexacyanoferrate (NaCrHCF) is obtained here using a facile co-precipitation method at room temperature. The powder was investigated in terms of potential use as a cathode material for aqueous sodium-ion batteries under neutral conditions. The highest achieved discharge capacity of NaCrHCF was around similar to 64 mA h g(-1) at C/3 current rate.

Official source

https://infoscience.epfl.ch/entities/publication/4d7bdc8d-e761-4cdf-a2da-b539e9203652

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Hubert Girault, Emad Oveisi, Dominika Baster, Pierre Mettraux
2019
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/4d7bdc8d-e761-4cdf-a2da-b539e9203652

About this result

Related concepts (23)

Cathode

A cathode is the electrode from which a conventional current leaves a polarized electrical device. This definition can be recalled by using the mnemonic CCD for Cathode Current Departs. A conventional current describes the direction in which positive charges move. Electrons have a negative electrical charge, so the movement of electrons is opposite to that of the conventional current flow. Consequently, the mnemonic cathode current departs also means that electrons flow into the device's cathode from the external circuit.

Hot cathode

In vacuum tubes and gas-filled tubes, a hot cathode or thermionic cathode is a cathode electrode which is heated to make it emit electrons due to thermionic emission. This is in contrast to a cold cathode, which does not have a heating element. The heating element is usually an electrical filament heated by a separate electric current passing through it. Hot cathodes typically achieve much higher power density than cold cathodes, emitting significantly more electrons from the same surface area.

Cathode ray

Cathode rays or electron beam (e-beam) are streams of electrons observed in discharge tubes. If an evacuated glass tube is equipped with two electrodes and a voltage is applied, glass behind the positive electrode is observed to glow, due to electrons emitted from the cathode (the electrode connected to the negative terminal of the voltage supply). They were first observed in 1859 by German physicist Julius Plücker and Johann Wilhelm Hittorf, and were named in 1876 by Eugen Goldstein Kathodenstrahlen, or cathode rays.

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