Cobalt atoms dispersed on hierarchical carbon nitride support as the cathode electrocatalyst for high-performance lithium-polysulfide batteries

Single-atom catalysts for metal-sulfur batteries: Current progress and future perspectives

“…In particular, the pyridinic, pyrrolic, and graphitic nitrogen in nitrogen-doped carbon materials can offer abundant coordination sites to anchor various metal atoms [96,104]. These coordination N on carbon is introduced by pyrolysis under NH 3 atmosphere or by pyrolysis under Ar atmosphere with nitrogen sources such as melamine [105], polymers containing N species [106], and g-C 3 N 4 templates [107,108]. Niu et al used glucose and dicyandiamide as the templates of nitrogen-doped graphene (NG), and NiCl 2 Á6H 2 O salt as the precursor of single Ni atoms [107].…”

Expediting redox kinetics of sulfur species by atomic‐scale electrocatalysts in lithium–sulfur batteries

“…Atomic‐scale electrocatalysts in Li–S batteries are strongly considered to enhance redox kinetics of sulfur conversion, as the atomically dispersed active sites on substrates can maximize the atom‐utilization efficiency for sulfur species modulation and curtail inert dosage in electrodes . Single cobalt and iron atoms coordinated with nitrogen have been explored as electrocatalysts to enhance kinetic conversion from LiPSs to Li 2 S and mitigate LiPS shuttle. However, kinetic understanding of the electrocatalytic capabilities of atomic electrocatalysts for Li–S batteries is rather limited, yet critically important to rational design of high‐efficiency electrocatalysts in Li–S batteries.…”

Carbon-containing electrospun nanofibers for lithium–sulfur battery: Current status and future directions

“…(4) Due to the high exposure of micro-nano structures under high SSA, signif- icant progress has recently been made in single atomic catalysis (SACs) [164] regarding accelerating LiPSs' conversion. Some metal SACs on graphene [165,166] or g-C 3 N 4 [167] surfaces have played a significant role in triggering the adsorption and reaction of LiPSs. Single metal atoms can effectively trap dissolved LiPSs and catalyze LiPSs/Li 2 S conversion (both forward and reverse reactions), thus significantly improving sulfur utilization, rate capability and cycling life of the LSBs.…”