Highly conductive VC embedded in carbon matrix as effective trapper and catalyst for Li-S batteries

Benben Wei; Chaoqun Shang; Xin Wang; Guofu Zhou

doi:10.1039/d0cc04741d

Highly conductive VC embedded in carbon matrix as effective trapper and catalyst for Li-S batteries

Chem Commun (Camb). 2020 Nov 25;56(91):14295-14298. doi: 10.1039/d0cc04741d. Epub 2020 Nov 2.

Authors

Benben Wei¹, Chaoqun Shang, Xin Wang, Guofu Zhou

Affiliation

¹ National Center for International Research on Green Optoelectronics, South China Normal University, Guangzhou 510006, China. [email protected].

PMID: 33135019
DOI: 10.1039/d0cc04741d

Abstract

Vanadium carbide embedded in a nitrogen-doped carbon matrix (VC@NCM) is synthesized as a 3D freestanding sulfur host. Owing to the high electrical conductivity (1.6 × 10⁴ S cm^-1) of VC and strong chemisorption and catalytic effect on sulfur species, Li-S batteries with VC@NCM deliver enhanced redox kinetics with ultralow capacity decay of 0.01% per cycle after 1000 cycles at 1C. This work identifies the effect of strong chemisorption and high electrical conductivity on high S utilization and cycle stability in Li-S batteries.