Thick free-standing electrode based on carbon–carbon nitride microspheres with large mesopores for high-energy-density lithium–sulfur batteries
- Title
- Thick free-standing electrode based on carbon–carbon nitride microspheres with large mesopores for high-energy-density lithium–sulfur batteries
- Author
- 장광석
- Keywords
- briquette process; carbon nitride; free‐standing electrode; high energy density; lithium–sulfur batteries; mesopores; Production of electric energy or power. Powerplants. Central stations; TK1001-1841
- Issue Date
- 2021-07
- Publisher
- Wiley
- Citation
- Carbon Energy, v. 3, NO 3, Page. 410-423
- Abstract
- The development of sulfur cathodes with high areal capacity and high energy
density is crucial for the practical application of lithium–sulfur batteries
(LSBs). LSBs can be built by employing (ultra) high‐loading sulfur cathodes,
which have rarely been realized due to massive passivation and shuttling.
Herein, microspheres of a carbon–carbon nitride composite (C@CN) with
large mesopores are fabricated via molecular cooperative assembly. Using the
C@CN‐based electrodes, the effects of the large mesopores and N‐functional
groups on the electrochemical behavior of sulfur in LSB cells are thoroughly
investigated under ultrahigh sulfur‐loading conditions (>15 mgS cm−2
). Furthermore, for high‐energy‐density LSBs, the C@CN powders are pelletized
into a thick free‐standing electrode (thickness: 500 μm; diameter: 11 mm) via a
simple briquette process; here, the total amount of energy stored by the LSB
cells is 39 mWh, corresponding to a volumetric energy density of 440 Wh L−1
with an areal capacity of 24.9 and 17.5 mAh cm−2 at 0.47 and 4.7 mA cm−2
,
respectively (at 24 mgS cm−2
). These results have significantly surpassed most
recent records due to the synergy among the large mesopores, (poly)sulfide‐
philic surfaces, and thick electrodes. The developed strategy with its potential
for scale‐up successfully fills the gap between laboratory‐scale cells and practical cells without sacrificing the high areal capacity and high energy
density, providing a solid foundation for the development of practical LSBs.
- URI
- https://www.proquest.com/docview/2555772690?accountid=11283https://repository.hanyang.ac.kr/handle/20.500.11754/172604
- ISSN
- 2637-9368
- DOI
- 10.1002/cey2.116
- Appears in Collections:
- COLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY[E](과학기술융합대학) > CHEMICAL AND MOLECULAR ENGINEERING(화학분자공학과) > Articles
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