Biological cell derived N-doped hollow porous carbon microspheres for lithium–sulfur batteries

Abstract

A green self-templating approach was designed to fabricate N-doped hollow porous carbon microspheres (NHPCMs) through renewable yeast cells for encapsulating sulfur.

Co−Ni Binary‐Metal Oxide Coated with Porous Carbon Derived from Metal‐Organic Framework as Host of Nano‐Sulfur for Lithium‐Sulfur Batteries

“…Figure 3a exhibits the XRD patterns of C/NCO, C/NCO@S and C/NCOÀ A@S. There is a distinct diffraction peak located at 38°in the C/NCO, C/NCO@S and C/NCOÀ A@S samples, which is corresponded to the NiCo 2 O 4 (PDF#20-0781). [35] The Brunauer-Emmett-Teller (BET) surface area of the C/NCO-450-A and C/NCO-450 composites is 375 m 2 g À 1 and 33 m 2 g À 1 , respectively. In addition, there is a broad peak around 26°, corresponding to the amorphous carbon.…”

Anisotropic polydopamine capsules with an ellipsoidal shape that can tolerate harsh conditions: efficient adsorbents for organic dyes and precursors for ellipsoidal hollow carbon particles

“…4,6,7,9,10,[22][23][24][25] Furthermore, polymeric capsules oen need to be processed into other materials in the dried state and under high temperature and pressure. 15,26,27 Keeping the intactness of their precious capsule-like shape is demanding during such stringent processes since the loss of the shape unavoidably devalues the advantages brought by the hollow cavity, and high specic surface area. For instance, highly charged spherical polystyrene capsules were dried into three dimensional colloidal crystals that can be used as photonic crystals for chemical sensing by the change of the structure color.…”

Honeycomb‐Like Nitrogen‐Doped Carbon 3D Nanoweb@Li2S Cathode Material for Use in Lithium Sulfur Batteries

“…The nature of graphitization of samples was investigated by Raman spectroscopy,a ss hown in Figure 2b.T he peaks at 1361 (D band) and 1594 cm À1 (G band) are attributedt oc arbon defects and carbon atoms in the sp 2 -hybridized state, respectively. [15] The intensity ratio (I D /I G )o ft he Da nd G band was approximately 0.99 for the HCNs and1 .04 for AB. [15] The intensity ratio (I D /I G )o ft he Da nd G band was approximately 0.99 for the HCNs and1 .04 for AB.…”