Abstract
The high-energy lithium/sulfur (Li/S) battery has become a very popular topic of research in recent years due to its high theoretical capacity of 1672 mAh/g. However, the polysulfide shuttle effect remains of great concern with a great number of publications dedicated to its mitigation. In this contribution, a three-dimensional (3D) reduced graphene oxide/activated carbon (RGO/AC) film, synthesized by a simple hydrothermal method and convenient mechanical pressing, is sandwiched between the separator and the sulfur-based cathode, acting as a functional interlayer to capture and trap polysulfide species. Consequently, the Li/S cell with this interlayer shows an impressive initial discharge capacity of 1078 mAh/g and a reversible capacity of 655 mAh/g even after 100 cycles. The RGO/AC interlayer impedes the movement of polysulfide while providing unimpeded channels for lithium ion mass transfer. Therefore, the RGO/AC interlayer with a well-designed structure represents strong potential for high-performance Li/S batteries.
Original language | English |
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Pages (from-to) | 1276-1281 |
Number of pages | 6 |
Journal | Journal of Energy Chemistry |
Volume | 26 |
Issue number | 6 |
DOIs | |
Publication status | Accepted/In press - 2017 |
Keywords
- Functional interlayer
- Lithium/sulfur battery
- Reduced graphene oxide/activated carbon composite
- Shuttle effect
ASJC Scopus subject areas
- Fuel Technology
- Energy Engineering and Power Technology
- Energy (miscellaneous)
- Electrochemistry