2D MXene nanosheets enable small-sulfur electrodes to be flexible for lithium–sulfur batteries
- 1 April 2019
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Nanoscale
- Vol. 11 (17), 8442-8448
- https://doi.org/10.1039/c8nr09653h
Abstract
Lithium–sulfur batteries are one of the most promising energy storage devices with high energy density, but their practical application is hindered by the serious capacity fading due to the shuttle effect resulting from the migration of polysulifdes during charge–discharge. Using small sulfur molecules (S2–4), in place of conventional cyclo-S8, as cathode materials is an efficient method to fundamentally eradicate the shuttle effect. To satisfy the demands of flexible electronic devices, in this paper, two-dimensional (2D) MXene nanosheets were used as a conductive binder and flexible backbone to combine with the S2–4/carbon composite, fabricating a flexible small-sulfur electrode for lithium–sulfur batteries. The 2D MXene nanosheets with excellent conductivity can not only provide flexibility for the electrode, but also construct a conductive network for fast charge transfer. As a result, the flexible S2–4 electrode exhibits superior electrochemical performance, which has a capacity of 1029.7 mA h g−1 at 0.1 C and maintains 946.7 mA h g−1 after 200 cycles with 91.9% retention. Besides, a capacity of 502.3 mA h g−1 is obtained at 2 C current density. This electrode is promising for flexible lithium–sulfur batteries, and the application of MXene as a conductive binder and flexible backbone in lithium–sulfur batteries offers an effective method to achieve both flexibility and high performance.Keywords
Funding Information
- National Natural Science Foundation of China (51572011, 51802012)
This publication has 53 references indexed in Scilit:
- Sulfur-embedded porous carbon nanofiber composites for high stability lithium-sulfur batteriesChemical Engineering Journal, 2018
- Single-wall carbon nanotube network enabled ultrahigh sulfur-content electrodes for high-performance lithium-sulfur batteriesNano Energy, 2017
- A review of flexible lithium–sulfur and analogous alkali metal–chalcogen rechargeable batteriesChemical Society Reviews, 2017
- Improved Rate Performance of Lithium Sulfur Batteries by In-Situ Anchoring of Lithium Iodide in Carbon/Sulfur CathodeElectrochimica Acta, 2017
- Enhanced Li–S batteries using cation-functionalized pigment nanocarbon in core–shell structured composite cathodesJournal of Materials Chemistry A, 2017
- Graphitized porous carbon materials with high sulfur loading for lithium-sulfur batteriesNano Energy, 2017
- Enhanced performances of Li/polysulfide batteries with 3D reduced graphene oxide/carbon nanotube hybrid aerogel as the polysulfide hostNano Energy, 2016
- Three-dimensional porous carbon composites containing high sulfur nanoparticle content for high-performance lithium–sulfur batteriesNature Communications, 2016
- 3D Graphene‐Foam–Reduced‐Graphene‐Oxide Hybrid Nested Hierarchical Networks for High‐Performance Li–S BatteriesAdvanced Materials, 2015
- Lithium–Sulfur Batteries: Progress and ProspectsAdvanced Materials, 2015