NiCo2S4 nanoparticles anchoring on polypyrrole nanotubes for high-performance supercapacitor electrodes

Ultrafast Microwave Synthesis of Nickel-Cobalt Sulfide/Graphene Hybrid Electrodes for High-Performance Asymmetrical Supercapacitors

“…As shown in Figure i, the HR-TEM image exhibits the conspicuous difference between NCS and graphene through their well-resolved lattice fringes and individual interplanar spacings. The interplanar spacings of 0.242 nm (Figure j) and 0.281 nm (Figure k) correspond to the (111) and (311) planes of the NiCo 2 S 4 cubic phase. , The interplanar distance of 0.252 nm (Figure l) can be attributed to the (100) plane of the CoS phase. , The lattice fringe with the interplanar spacing of 0.358 nm (Figure m) was assigned to the (002) plane of hexagonal graphitic carbon. , The HRTEM results are consistent well with the XRD results.…”

“…In recent years, the environmental deterioration and the huge depletion of fossil fuels have expedited the development of clean and renewable energy sources. − Electrochemical energy storage devices are essential for the development of renewable energy system. This is because most of those renewable energy sources (i.e., solar, wind, hydro energy, etc.)…”

“…Transition-metal sulfides (TMSs) have been intensively studied in many areas, especially, as promising electrode materials because of their high theoretical specific capacitance, excellent cycling stability, high energy density, admirable conductivity, and low cost. − Several TMSs have been explored as electrodes for SCs such as MnS, CoS, MoS 2 , CuS, FeS 2 , NiS, etc. − However, it is still challenging for TMSs to meet the practical application requirements in terms of specific capacitance, energy density, and cyclic stability. Compared to the monometallic sulfides, the mixed metal sulfides, especially the nickel-cobalt sulfides (NCSs), exhibit higher specific capacitance and cycling stability due to their richer redox-active reactions sites and higher electronic conductivity . As a result, NCSs with remarkable theoretical capacitance have been regarded as promising electrode materials .…”

Green synthesis of ferrocenyl‐modified MnO2/carbon‐based nanocomposite as an outstanding supercapacitor electrode material

“…In contrast, in the PC electrode materials, reversible redox reaction occurs at or near the electrode surface, and energy is stored via faradaic reactions. [8][9][10][11] In the EDLC materials, electrode surface area, conductivity, and porosity are important factors controlling ion transfer. Various carbon-based nanomaterials including graphene oxide (GO), carbon nanotubes (CNTs), carbon spheres, and carbon aerogels are categorized in the EDLC group.…”

Long-Term Stable Near-Infrared–Short-Wave-Infrared Photodetector Driven by the Photothermal Effect of Polypyrrole Nanostructures

“…Polypyrrole (PPy) is a conductive polymer which has been intensively investigated during the last decades. [16][17][18] Due to its broadband absorption in the UV-Vis and NIR/SWIR spectrum, excellent conductivity and photothermal effect, PPy-NPs have been applied for photocatalysis, 19,20 supercapacitor electrodes, 21,22 photothermal therapy (PTT) [23][24][25][26] and biomedical imaging. 25,[27][28][29] For example in PTT application, [30][31][32][33] while both plasmonic Au-NRs and PPy-NPs can exhibit strong photothermal effect, the synthesis of PPy-NPs does not require costly noble metal elements.…”