Effect of nickel and manganese doping on the structure, morphology and the electrochemical performance of the silicon-carbon films

Study of functional characteristics of mesoporous electrodes of supercapacitors based on silicon-carbon films

“…The surface of the Ni-containing SCF (Fig. 1, e) is probably coated with a nickel-containing phase, like the samples discussed in the earlier study, confirmed by Raman spectroscopy [23], and has a porous structure with grains and agglomerates. The thickness of the films measured by the interferometric method was in the range of 350−800 nm.…”

“…The pore size distribution shows a bimodal pore distribution. This confirms that nickel, does not interact with the silicon-carbon matrix unlike manganese [23]. In the sample obtained from a solution based on methanol and HMDS with a ratio of 2:1, the highest value of the specific surface area of mesopores and micropores is observed.…”

“…For " pure" SCF the peaks are almost unnoticeable, while the height of the peak increases with the metals introduction into the film, especially in the sample with the nickel addition. The reaction mechanism can be represented by the following scheme [23]:…”

“…In previous papers [22,23] a number of properties was studied and the possibility of using SCFs obtained by electrochemical deposition according to the original method of the authors as electrodes of supercapacitors has been shown. The synthesized SCFs are porous materials that are interesting for applications in this area due to their structural characteristics [24,25].…”

Engineering Co3O4/MnO2 nanocomposite materials for oxygen reduction electrocatalysis

“…Spinel Co 3 O 4 is an alternative type of electrocatalyst that has low resistivity and excellent ORR catalytic performance [17,18]. Mixing these two classes of materials provides a nanocomposite material with collaboration and coping effects that create oxygen vacancies, which improves the ORR activity [19,20]. To enhance the electrochemical performance of the catalysts for ORR, nanocomposite catalysts such as CuO@MnO 2 [21], NiCo 2 O 4 @MnO 2 [22], TiO 2 @MnO 2 [23], ZnO/MnO 2 [24], Fe 2 O 3 -MnO 2 [25], Co 3 O 4 /MnO 2 -CNTs [26], and Co 3 O 4 @MnO 2 [27] have been investigated.…”