A kind of transition metal hypervalent oxide electrode and its preparation method and application

Abstract

The invention relates to a transition metal high-valent oxide electrode, a preparation method and application thereof, belonging to the technical field of electrochemistry. The transition metal high-valent oxide electrode includes a current collector and a coating layer uniformly coated on the current collector, and the coating layer is composed of high-valent oxides of transition metal elements. The preparation method is as follows: dissolving soluble transition metal salt and buffering agent in water to form a mixed solution, adjusting the pH value of the mixed solution to 6-8 to obtain an electrodeposition solution; then using the current collector material after surface cleaning as an anode, The anode is placed in the electrodeposition solution obtained in step 1 for oxidation electrochemical deposition, and a transition metal hypervalent oxide electrode is obtained on the anode. Including the electrochemical element; the electrochemical element contains the transition metal high-valence oxide electrode. The invention has reasonable component design, simple preparation process, excellent performance of the obtained product, and is convenient for large-scale industrial application.

Description

technical field

[0001] The invention relates to a transition metal high-valent oxide electrode, a preparation method and application thereof, belonging to the technical field of electrochemistry. Background technique

[0002] Supercapacitors have been widely valued for their high-power performance and long cycle life. The main problem faced by supercapacitors is their relatively low energy density compared to batteries. In order to improve the performance of supercapacitors, that is, to increase the specific energy while maintaining their advantages such as high specific power, extensive research has been carried out around various transition metal oxide electrodes with faradaic pseudocapacitive behavior. Although RuO 2 High-power charging and discharging is very good, but its resources are scarce, the price is high, and it is difficult to obtain commercial promotion in the civilian industry. In order to seek cheap supercapacitor electrode materials, around NiO, Co 3 o ...

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