Nitrogen-doped carbon-wrapped porous FeMnO3 nanocages derived from etched prussian blue analogues as high-performance anode for lithium ion batteries

Interlayer Expanded MoS2/Nitrogen-Doped Carbon Hydrangea Nanoflowers Assembled on Nitrogen-Doped Three-Dimensional Graphene for High-Performance Lithium and Sodium Storage

“…The survey spectrum exhibited in Figure S8 demonstrates the presence of Mo, S, C, and N elements in MoS 2 /NC@N3DG. In the Mo 3d spectrum (Figure 3c), two predominant peaks at 229.1 and 232.3 eV are eV (Figure 3f), fitted to the pyridinic N and pyrrolic N. 30,51 The successfully doped nitrogen atoms can improve the electronic conductivity of the MoS 2 /NC@N3DG composite and promote electron transport and ion diffusion.…”

“…The survey spectrum exhibited in Figure S8 demonstrates the presence of Mo, S, C, and N elements in MoS 2 /NC@N3DG. In the Mo 3d spectrum (Figure c), two predominant peaks at 229.1 and 232.3 eV are ascribed to Mo 3d 5/2 and Mo 3d 3/2 of Mo 4+ , while the other two peaks at 235.8 and 226.3 eV are assigned to Mo 3d 3/2 of Mo 6+ and S 2s, respectively. , The S 2p spectrum contains two peaks at 161.9 and 163.1 eV, which correspond to S 2p 3/2 and S 2p 1/2 (Figure d), suggesting the presence of S 2– . , As displayed in Figure e for the C 1s spectrum, three peaks centered at 284.3, 285.3, and 287.8 eV could be attributed to C–C/CC, C–N, and CN, respectively. , Also, the N 1s spectrum is deconvoluted into two peaks at 399.3 and 401.5 eV (Figure f), fitted to the pyridinic N and pyrrolic N. , The successfully doped nitrogen atoms can improve the electronic conductivity of the MoS 2 /NC@N3DG composite and promote electron transport and ion diffusion.…”

“…Based on the above issues, some optimization methods have been designed and studied, such as combination with conductive carbon materials, nitrogen atom doping, and expansion of interlayer spacing, to make MoS 2 show better and more stable electrochemical performance . Incorporating with conductive carbon materials, such as amorphous carbon, , graphene, , and carbon nanotubes, can improve the conductivity of the composite, helping it exhibit high capacity and superior rate capability. Graphene used as a substrate can also relieve the stacking and agglomeration of MoS 2 two-dimensional nanoflakes, which is also helpful to the improvement of electrochemical properties. , Doping nitrogen atoms in the conductive carbon materials could further boost the conductivity and interface stability of the composite, leading to more advanced lithium/sodium-ion transmission and storage performance. − In addition to electronic modulation, nitrogen atom doping can provide more reactive sites, promote reaction kinetics, and enhance the lithium/sodium storage ability. , …”

“…27,28 Based on the above issues, some optimization methods have been designed and studied, such as combination with conductive carbon materials, nitrogen atom doping, and expansion of interlayer spacing, to make MoS 2 show better and more stable electrochemical performance. 29 Incorporating with conductive carbon materials, such as amorphous carbon, 30,31 graphene, 6,32 and carbon nanotubes, 33 can improve the conductivity of the composite, helping it exhibit high capacity and superior rate capability. Graphene used as a substrate can also relieve the stacking and agglomeration of MoS 2 twodimensional nanoflakes, which is also helpful to the improvement of electrochemical properties.…”

Prussian Blue Analogs and Their Derived Nanomaterials for Electrochemical Energy Storage and Electrocatalysis

“…selected thioglycolic acid to etch Mn–Fe PBA nanodices, leading to the formation of Mn–Fe PBA nanocages. [ 126 ] After thermal annealing and further carbon coating from polypyrrole, FeMnO 3 @NC nanocages were successfully fabricated. Benefiting from the nanocage‐like structure for buffering volume change and nitrogen‐doped carbon layer for enhancing conductivity and stability, the FeMnO 3 @NC‐based electrode exhibits superior electrochemical performances, including high capacity of ≈1008 mAh g −1 after 500 cycles at 1 A g −1 , desirable rate capability and excellent cycling stability.…”