Sulfur encapsulated in nitrogen-doped graphene aerogel as a cathode material for high performance lithium-sulfur batteries

High‐performance LiMn 0 . 8 Fe 0 . 2 PO 4 /C cathode prepared by using the toluene‐soluble component of pitch as a carbon source

“…In addition, the low intensity characteristic peaks of elements N and S are observed. As shown in Figure 6B, the strong peak of C 1s at 284.80 eV indicates that the cracked carbon is well bonded on the surface of the LiMn 0.8 Fe 0.2 PO 4 crystal, and the peak at 286.02 eV corresponds to the CN or CS bond, indicating that the presence of strong chemical bonds between sulfur or nitrogen and carbon 41 . As shown in Figure 6C, the XPS spectrum of N 1s can be divided into three peaks, corresponding to the pyridine−N peak at 398.68 eV, pyrrole−N peak at 399.78 eV, and graphite−N peak at 401.54 eV, respectively.…”

Defect engineering of two-dimensional materials for advanced energy conversion and storage

“…[419][420][421] There have been many reports on the use of N-doped graphene in Li-S batteries. [422][423][424][425] Numerous defects generated by N doping could not only improve the carrier density but also act as active centers for effective interface adsorption of polysulfides on the graphene surface (Fig. 26a and b).…”

Advances of graphene-based aerogels and their modifications in lithium-sulfur batteries

“…Jia et al [138] conducted a comprehensive research on the influence of the nature of N-dopants for GAs on the electrochemical performance of GA-based sulfur cathodes. EDA, urea and ammonia were studied as sources of nitrogen during hydrothermal synthesis of GAs.…”