Investigation of hybrid‐capacitor properties of ruthenium complexes

Abstract

Summary Ru complexes were successfully produced, and their structural properties were investigated using FTIR, Raman, and single crystal XRD patterns. The HOMO, LUMO, Eg, and electronic surface potential (ESP) values of the molecules were calculated by a Gaussian program. The complexes were used for producing hybrid capacitor cells as electrode materials. According to electrochemical analysis, complex 2 showed the best CV graph between −1 V and +1 V and had the highest current value and hysteresis area when compared with the other complexes. The performance analysis and the capacity fade of the cells were investigated. The first capacity values of the complexes were 57.5, 22.1, 16.9, and 0.0021 F/g for complexes 1, 2, 3, and 4, respectively. The capacitive mechanism of the cells as relates to molecular interactions was also investigated. We suggested that the ESP values of the molecules were directly related to the capacitive performance of the cells. In addition to this, the best cycling performance was obtained for complex 2, which has the lowest Eg value among the complexes. We speculate that the charged regions on the complex materials have a crucial role in the increasing the capacitance of the cells.

Organic template-assisted green synthesis of CoMoO4 nanomaterials for the investigation of energy storage properties

“…8c) of CoMoO 4 because of a large number of active sites provided by Mo, Co and the functional groups of the organic species, as well as by spherical-shaped nanoparticles. The results of the present study is in agreement with the previous study of Altin et al, 77 where they reported the favourable electrochemistry (considerable specic capacitance) of different ruthenium complexes with four different organic compounds. They reported that the specic capacitance of ruthenium was increased due to the higher surface areas of the organic compounds.…”

Effect of NiO on organic framework functionalized ZnO nanoparticles for energy storage application

“…Supercapacitors (also known as electrochemical capacitors) have gained extensive research focus in the field of energy storage due to reasonable high power density, quick charging and discharging, safe operation, and optimum working conditions . The performance of a capacitor is critically depending on its electrode . Therefore, over recent years, the development of efficient supercapacitor electrode is the focus of attention among researcher …”

“…The performance of a capacitor is critically depending on its electrode . Therefore, over recent years, the development of efficient supercapacitor electrode is the focus of attention among researcher …”

“…They used conductive graphite as source of carbon. Altin et al synthesized different complexes of ruthenium and organic compounds (organometallic complexes) as electrode material. Results of their investigation revealed highest capacitance of 57.5 F/g.…”

AN INVESTIGATION OF SPIN-ORBIT COUPLING OF [Eu(NO3)3 (2 pb)2]∙CH3COCH3 COMPLEX

“…Bond lengths between C-N atoms are also within a certain range of value. They have an average value of 1.3544 (Å), so these bonds are weaker than the others [14]. The HOMO and LUMO energy levels of the complex and the Eg value, which is the difference between them, are given in the Table 2.…”