To promote polysulfide conversion in lithium sulfur batteries (LSB) and alleviate the shuttle effect, we designed and fabricated a novel catalyst of vanadium-doped graphite phase carbon nitride with nitrogen defects (V@gCN-ND) and high vanadium loading (3.46 at%) by defect engineering and two-step pyrolysis. Employing a V@gCN-ND modified separator, the LSB yielded capacities of 934 mA h g at 1C and 404 mA h g at 4C; the former was retained by 61% and 45% after 500 and 1000 cycles, respectively. In particular, the initial capacity of the battery reached 969 mA h g at a sulfur loading of 10.0 mg cm. This work provides a facile route to the preparation of high-loading vanadium active site catalysts with nitrogen defects in the support, which are promising for high performance LSB applications.

Download full-text PDF

Source
http://dx.doi.org/10.1039/d3cc03422dDOI Listing

Publication Analysis

Top Keywords

carbon nitride
8
high performance
8
nitrogen defects
8
vanadium-doped graphitic
4
graphitic carbon
4
nitride high
4
performance lithium-sulfur
4
lithium-sulfur batteries
4
batteries promote
4
promote polysulfide
4

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!