关键词: 超级电容器, 电化学, 电沉积, 制备, 复合材料

Abstract:

The pseudo-capacitor material hydroxide/oxide has the advantage of high specific capacity and can be used in fields with high energy density and moderate power density. The preparation of hydroxide/oxide electrodes by electrodeposition method is simple. The element composition, morphology, size, and deposition amount can be regulated, which can effectively play the capacitor performance of materials, and is a very promising electrode preparation method. However, some methods, rules and influencing factors for preparing supercapacitor electrodes by electrodeposition still need to be summarized and clarified. The electrodeposition mechanism of hydroxide/oxide and the influence of deposition amount, micro-morphology, specific surface area, pore structure, electrochemical impedance and other factors on the performance of hydroxide/oxide were summarized. The general rules of cyclic voltammetry electrodeposition, constant potential electrodeposition, constant current electrodeposition methods and the relevant research results were summarized. The problems of preparing hydroxide/oxide by electrodeposition were analyzed, such as insufficient adhesion between the deposition layer and substrate, uneven deposition, and difficulty obtaining high performance and a large amount of deposition layer. The future research trends of electrode materials prepared by electrodeposition, such as multicomponent composites and the use of green additives and templates, were prospected.

Key words: supercapacitors, electrochemistry, electrodeposition, preparation, composites