Facile synthesis of nitrogen-doped carbon derived from polydopamine-coated Li₃V₂(PO₄)₃as cathode material for lithium-ion batteries

Abstract

Nitrogen-doped, carbon-coated Li3V2(PO4)3 cathode materials were prepared by the oxidative self-polymerization of dopamine on the Li3V2(PO4)3 surface and subsequent carbonization of polydopamine.

Carbon‐Coated Magnesium Ferrite Nanofibers for Lithium‐Ion Battery Anodes with Enhanced Cycling Performance

“…Clearly, C and N are observable together with Fe, Mg, and O, which indicates that C and N are distributed uniformly in MFO@C‐2. As described previously, N‐doping can improve the electronic conductivity and Li + transport of the carbon layer …”

“…Clearly,CandNare observable together with Fe,M g, and O, which indicates that Ca nd Na re distributed uniformly in MFO@C-2.A sd escribed previously, N-doping can improve the electronic conductivity and Li + + transport of the carbon layer. [39][40][41][42] TheX -ray photoelectron spectroscopy (XPS) survey spectra of MFO@C-2 and high-resolutionXPS spectra of N1sa re depicted in Figure 3. Thee lements of Mg, Fe, O, C, andN are detected in the overall XPS spectra of MFO@C-2 (Figure 3a), which indicate that PDA was converted into N-dopedc arbon after the carbonizationp rocess.…”

“…TheN 1s peak at ab inding energy( BE) of approximately 400 eV in the MFO@C-2 survey spectra can be fitted with three components.I nt he high-resolutionX PS spectrum of N1s( Figure 3b)t he peak at BE % 398.4 eV can be assigned to pyridinic nitrogen (N-1), the peak located at BE % 399.8 eV is ascribed to pyrrolic nitrogen (N-2),a nd the peak at BE % 400.6 eV corresponds to graphitic nitrogen (N-3). [16,41,43] Thei ntroduction of Ncan enhance the electrical conductivity of the electrode and enable Li + + transport because of the defects in the carbon induced by N-doping, which can lead to the improvemento ft he Li storage capacity. [41,[43][44][45] Them Thec arbon contents of MgFe 2 O 4 and MgFe 2 O 4 @C nanofibers were evaluated by using thermogravimetrica nalysis (TGA).…”

“…[16,41,43] Thei ntroduction of Ncan enhance the electrical conductivity of the electrode and enable Li + + transport because of the defects in the carbon induced by N-doping, which can lead to the improvemento ft he Li storage capacity. [41,[43][44][45] Them Thec arbon contents of MgFe 2 O 4 and MgFe 2 O 4 @C nanofibers were evaluated by using thermogravimetrica nalysis (TGA). In additiont o the evaporation of absorbedm oisture,t here is not much weightl oss for the MgFe 2 O 4 nanofibers ( Figure 5).…”

Ultra‐long cycle life and high rate performance subglobose Na 3 V 2 ( PO 4 ) 2 F 3 @C cathode and its regulation

“…The absorption peak at 400.9 eV is belonging to N 1s, which is originated from the decomposition of CTAB. These results indicate that CTAB and PVDF have been converted to N‐doped carbon after high temperature sintering, which is beneficial for Na + transport in the interface between carbon layer and electrode 31 …”