The construction of carbon nanofiber composites modified by graphene/polypyrrole for flexible supercapacitors

Carbon Layer and CoO Nanosheet Dual-Encapsulated SiOx Particles for Ultra-High Specific Capacity Lithium-Ion Batteries

“…The detailed analysis of the corresponding peaks of the SiO x @C@CoO composites is shown in Figure c–f. The C 1s spectrum could be divided into three peaks at 284.8, 286, and 288.6 eV, assigned to the C–C, C–O, and CO bond, respectively, indicating that the carbon source was encapsulated well on the SiO x particles after the pyrolysis process (Figure c). , The O 1s spectrum could be decomposed into the Co–O bond, Si–O bond, C–O bond, and CO bond (Figure d), and the metal Co–O bond further revealed that the metal oxide CoO was fabricated successfully. The Si 2p spectrum could be deconvoluted into Si 1+ , Si 2+ , Si 3+ , and Si 4+ in SiO x (Figure e). , As it is seen from the Co 2p high-resolution XPS spectra (Figure f), the two peaks at 780.2 and 796.2 eV were associated with Co 2p 3/2 and Co 2p 1/2 and the two peaks at 786.6 and 802.2 eV belonged to the satellite peaks of Co 2p 3/2 and Co 2p 1/2 , respectively.…”

“…carbon source was encapsulated well on the SiO x particles after the pyrolysis process (Figure 3c). 38,39 The O 1s spectrum could be decomposed into the Co−O bond, Si−O bond, C−O bond, and C�O bond (Figure 3d), and the metal Co−O bond further revealed that the metal oxide CoO was fabricated successfully. The Si 2p spectrum could be deconvoluted into Si 1+ , Si 2+ , Si 3+ , and Si 4+ in SiO x (Figure 3e).…”

Design of SiO x /TiO2@C hierarchical structure for efficient lithium storage

“…Due to the active material being coated by a carbon layer and the doping of TiO 2 blocking the mesoporous channels of the composite material, the specific surface area is reduced. At the same time, the synergistic effect cannot only provide abundant active sites, but also increase the electrode's conductivity, which is beneficial for energy storage [46]. The pore size distribution of the composites as determined by density functional theory is shown in figures 5(b) and S2(c), (d).…”

1D hollow tubular/2D nanosheet hybrid dimensional porous carbon prepared by one-step carbonization using natural minerals as templates for supercapacitors

“…The N1s spectrum was deconvoluted into three peaks labeled as pyridinic-N (N-6), pyrrolic-N (N-5) and graphitic-N (N-Q), located at 397.57, 399.66 and 404.34 eV, respectively. [34][35][36] The nitrogen content for N-6, N-5 and N-Q is 20.9%, 67.4% and 11.7%, respectively (Fig. 2f).…”