Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 7, Issue 11, Pages 6507-6513Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9ta00212j
Keywords
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Funding
- Australian Renewable Energy/Agency (ARENA) project [ARENA 2014/RND106]
- China Postdoctoral Science Foundation [2018M630747]
- Natural Science Foundation of Shandong Province, China [ZR2018JL021, ZR2014EMQ011]
- National Natural Science Foundation of China [51402160]
- Qingdao Post-doctoral Applied Research Project
- Taishan Scholar Program of Shandong Province, China
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Lithium-sulfur (Li-S) batteries with a high theoretical energy density are attracting increasing attention as promising candidates for next-generation energy storage systems. However, the insulating nature and undesirable shuttle effect of sulfur species dramatically impede their practical applications. Herein, a unique 3D porous Ti3C2Tx MXene/rGO (MX/G) hybrid aerogel is rationally designed and applied for the first time as a free-standing polysulfide reservoir to improve the overall performance of Li-S batteries. In this strategy, highly conductive MXene and rGO are integrated into a 3D interconnected porous aerogel structure with efficient 2D polar adsorption interfaces, enabling fast Li+/electron transport and strong chemical anchoring of lithium polysulfides as well as enhanced redox reaction kinetics. The robust MX/G aerogel electrodes deliver excellent electrochemical performances including a high capacity of 1270 mA h g(-1) at 0.1C, an extended cycling life up to 500 cycles with a low capacity decay rate of 0.07% per cycle, and a high areal capacity of 5.27 mA h cm(-2).
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