期刊
NANO ENERGY
卷 41, 期 -, 页码 665-673出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nanoen.2017.10.020
关键词
Air pollution; Water-dispersed sulfur nanoparticles; Li-S battery; H2S; SO2
类别
资金
- National Science Fund for Distinguished Young Scholars, China [51525204]
- National Key Basic Research Program of China [2014CB932400]
- National Natural Science Foundation of China [U1401243, 51602220]
Sulfur shows totally opposite faces in environmental and energy issues. Sulfur containing gases, H2S and SO2, are dominant air pollutants, while sulfur plays as the clean energy carrier for Li-Sulfur (Li-S) batteries. Herein, through confining the gaseous comproportionation reaction in water, between H2S and SO2 that normally produces uncontrollable aggregates, we develop a completely clean approach to convert the air pollutants into water-dispersed sulfur nanoparticle (WDS). The WDS is contaminant-free, size-controllable, and more promisingly solution processable, and is thus ideal for achieving solution hybridization with other materials for various applications. As a typical example, an aqueously fabricated WDS/carbon nanotube composite delivers the theoretical capacity of sulfur at 0.5 A g(-1), and a capacity of similar to 750 mAh g(-1) even at a high current density of 5.0 A g(-1). In addition to the normal use of sulfur as cathode, a new-concept WDS/carbon interlayer with a low sulfur content has been designed to inhibit the shuttling of polysulfides, greatly improving the cycling performance of the Li-S battery. The proposed approach gives a good example to turning pollutants into clean energy carriers by green chemistry.
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