Additional file 1: of MOF-Derived ZnSe/N-Doped Carbon Composites for Lithium-Ion Batteries with Enhanced Capacity and Cycling Life

Figure S1. SEM images of ZIF-8 at different sizes (a) ZIF-900, (b) ZIF-300, (c) ZIF-40, and (d) the XRD patterns of synthesized ZIF-8 at different sizes and simulated XRD pattern. Figure S2. (a, b) TEM images of ZnSe/NC-900 and ZnSe/NC-40, respectively, (c, d) HRTEM images of ZnSe/NC-900 and ZnSe/NC-40, respectively, (e, f) SAED images of ZnSe/NC-900 and ZnSe/NC-40, respectively. Figure S3. XPS survey spectra of ZnSe/NC-300. Figure S4. (a, b) Nitrogen adsorption-desorption isotherms of ZnSe/NC-900 and ZnSe/NC-40, respectively, (c, d) their pore diameter distribution profiles. Figure S5. The first three cyclic CV cures of (a) pure ZnSe, (b) ZnSe/NC-900, and (c) ZnSe/NC-40 at a scan rate of 0.2 mV/s in the range of 0.01–3.0 V. Figure S6. Galvanostatic discharge/charge voltage profiles of (a) pure ZnSe, (b) ZnSe/NC-900, (c) ZnSe/NC-40 at a current density of 100 mA g−1. Figure S7. EIS spectra of pure ZnSe, ZnSe/NC-900, ZnSe/NC-300, and ZnSe/NC-40 after 100 cycles. Table S1. Comparison of ZnSe/NC composites and other metal selenides as LIB anodes. (DOC 2425 kb

H₂‑Dependent Carbon Dissolution and Diffusion-Out in Graphene Chemical Vapor Deposition Growth

Highlighting the roles of H₂ on the carbon dissolution and diffusion-out unit steps in the metal substrate is highly imperative to constitute a whole puzzle elucidating how the H₂ affects the graphene chemical vapor deposition (CVD) growth, taking into account that the effects of H₂ on the surface process have been intensively emphasized. In this article, we designed a series of graphene growth experiments by introducing the H₂ in the individual unit step on the Cu and Co films as a comparison due to their distinctively intrinsic carbon solubility. We investigated the effects of H₂ on the crystallographic structure, surface morphology, and chemical environment of metal substrates, and the thickness and quality of as-grown graphene films. We also established the theoretical models to monitor the interaction between carbon and metal atoms with and without H₂. Our results demonstrate that the H₂ predissolution could suppress the carbon dissolution in the Cu film and enhance the diffusion-out of dissolved carbon atoms, whereas in the Co film the converse would occur

Nanostructured Films of Ordered Fe Nanowires for High-Performance Transparent Electromagnetic Interference Shielding

Although metal nanowires (NWs), such as silver NWs, are ideal materials for flexible transparent electromagnetic shielding films, the challenge of obtaining absorptive shielding films with high transmittance and shielding efficiency (SE) still exists. To address this issue, this study used iron nanowires (Fe NWs) with excellent microwave absorbing properties to construct structures with ordered NW distributions. A series of polyethylene terephthalate (PET)/Fe NWs/poly (3,4-ethylenedioxythiophene) (PEDOT) electromagnetic interference (EMI) shielding films were prepared using the magnetic-field-induced orientation. The results demonstrate that the ordered Fe NW network structure can effectively overcome the problem of the trade-off between light transmittance and EMI SE. Specifically, at a Fe NW surface density of 201.78 mg/m2, the ordered PET/Fe NWs/PEDOT films demonstrated a 49.06% increase in light transmittance and a 32.94% increase in EMI SE (19.37 dB), compared to the films with randomly distributed Fe NWs. Furthermore, constructing a double-layer Fe NW network with a stagger angle of 45° at the same surface density increased the EMI SE by 73.2% relative to the monolayer-ordered Fe NW structure, reaching an SE value of 33.54 dB, while maintaining almost unchanged light transmittance. Additionally, the PET/Fe NWs/PEDOT films maintain 97.4% of EMI performance after 3000 bending cycles. Overall, this study provides a new approach for creating high-performance flexible transparent EMI shielding films

Nanostructured Films of Ordered Fe Nanowires for High-Performance Transparent Electromagnetic Interference Shielding

Although metal nanowires (NWs), such as silver NWs, are ideal materials for flexible transparent electromagnetic shielding films, the challenge of obtaining absorptive shielding films with high transmittance and shielding efficiency (SE) still exists. To address this issue, this study used iron nanowires (Fe NWs) with excellent microwave absorbing properties to construct structures with ordered NW distributions. A series of polyethylene terephthalate (PET)/Fe NWs/poly (3,4-ethylenedioxythiophene) (PEDOT) electromagnetic interference (EMI) shielding films were prepared using the magnetic-field-induced orientation. The results demonstrate that the ordered Fe NW network structure can effectively overcome the problem of the trade-off between light transmittance and EMI SE. Specifically, at a Fe NW surface density of 201.78 mg/m2, the ordered PET/Fe NWs/PEDOT films demonstrated a 49.06% increase in light transmittance and a 32.94% increase in EMI SE (19.37 dB), compared to the films with randomly distributed Fe NWs. Furthermore, constructing a double-layer Fe NW network with a stagger angle of 45° at the same surface density increased the EMI SE by 73.2% relative to the monolayer-ordered Fe NW structure, reaching an SE value of 33.54 dB, while maintaining almost unchanged light transmittance. Additionally, the PET/Fe NWs/PEDOT films maintain 97.4% of EMI performance after 3000 bending cycles. Overall, this study provides a new approach for creating high-performance flexible transparent EMI shielding films

Nanostructured Films of Ordered Fe Nanowires for High-Performance Transparent Electromagnetic Interference Shielding

Although metal nanowires (NWs), such as silver NWs, are ideal materials for flexible transparent electromagnetic shielding films, the challenge of obtaining absorptive shielding films with high transmittance and shielding efficiency (SE) still exists. To address this issue, this study used iron nanowires (Fe NWs) with excellent microwave absorbing properties to construct structures with ordered NW distributions. A series of polyethylene terephthalate (PET)/Fe NWs/poly (3,4-ethylenedioxythiophene) (PEDOT) electromagnetic interference (EMI) shielding films were prepared using the magnetic-field-induced orientation. The results demonstrate that the ordered Fe NW network structure can effectively overcome the problem of the trade-off between light transmittance and EMI SE. Specifically, at a Fe NW surface density of 201.78 mg/m2, the ordered PET/Fe NWs/PEDOT films demonstrated a 49.06% increase in light transmittance and a 32.94% increase in EMI SE (19.37 dB), compared to the films with randomly distributed Fe NWs. Furthermore, constructing a double-layer Fe NW network with a stagger angle of 45° at the same surface density increased the EMI SE by 73.2% relative to the monolayer-ordered Fe NW structure, reaching an SE value of 33.54 dB, while maintaining almost unchanged light transmittance. Additionally, the PET/Fe NWs/PEDOT films maintain 97.4% of EMI performance after 3000 bending cycles. Overall, this study provides a new approach for creating high-performance flexible transparent EMI shielding films