Evaluation of potassium ferrate(VI) cathode material coated with 2,3-Naphthalocyanine for alkaline super iron battery

Preparation and stability study of potassium ferrate (VI) coated with phthalocyanine for alkaline super-iron battery

“…It is due to the fact that the existence of H 2 Pc can reduce the contact area between K 2 FeO 4 electrode and alkaline electrolyte, so it can inhibit the production of Fe (III) layer which possess large chargetransfer resistance and to ensure the unlocked chargetransfer. The result is consistent with previous report [15,16]. But with increasing immersion time to 6 h, the charge-transfer resistances are almost equal to electrodes with various contents of H 2 Pc.…”

“…The research works mentioned above have given us inspiration to apply H 2 Pc into ferrate battery. In our previous work [15,16], the stability of K 2 FeO 4 electrodes was improved by 2,3-H 2 Nc coating for the alkaline super-iron battery. In this study, we investigated the effects of H 2 Pc coating on the potassium ferrate (VI) cathode for the alkaline super-iron battery.…”

Effect of C48H26N8 coating on electrochemical performance of alkaline super iron battery

“…The coating method was identical with that used in the previous work [20], i.e., H 2 Nc was dissolved in ether (A.R.) under ultrasonic vibration, and then 96.8% solid K 2 FeO 4 was added and was dispersed by ultrasonic.…”

“…In our previous work [20], the stability of K 2 FeO 4 electrodes was dramatically improved when coated with H 2 Nc. The cathodic charge capacity of K 2 FeO 4 coated with 2% H 2 Nc was 42% higher than that of uncoated K 2 FeO 4 when discharged at the rate of 0.25 C to a cutoff of 0.8 V after storing in the 10 mol L À1 KOH for 3 h. And there was no reaction between K 2 FeO 4 and H 2 Nc according to Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS).…”

The adoption and mechanism of KIO4 for redox-equilibrated stabilization of FeO4 2− as an equalizer in water

“…Zhang et al [18] investigated that the Y 2 O 3 -ZrO 2 composite coatings were used to greatly improve the stability and charge transfer properties of K 2 FeO 4 cathodes in an alkaline electrolyte relative to the uncoated cathode. More research [16,19,20] combined the use of organic compounds and inorganic materials to coat K 2 FeO 4 to improve the stabilization of ferrate in recent years. In this study, it was found that FeO 4 2− in water was stabilized by the addition of KIO 4 as coexisting oxidized ions and buffers.…”