期刊
ENERGY STORAGE MATERIALS
卷 49, 期 -, 页码 236-245出版社
ELSEVIER
DOI: 10.1016/j.ensm.2022.04.022
关键词
Lithium-sulfur batteries; Conductive additives; Polymer binders; Slurry-coating cathodes; High sulfur loading
资金
- National Key R&D Program of China [2020YFB1505802]
- NSF of China [92161107]
- Youth Innovation Fund of Xiamen City [3502Z20206047]
- NSF of Fujian Province [2017J01103]
We proposed a convenient and universal strategy for fabricating high-sulfur-loading cathodes in lithium-sulfur batteries by designing sulfur host materials. Water-based conductive inks with improved mechanical and conductive properties were developed through rational design of conductive additives and polymer binders. This strategy not only enables the construction of high-energy-density lithium-sulfur batteries, but also shows potential for diverse lab-developed sulfur hosts.
Lithium-sulfur (Li-S) battery research has been greatly advanced through designing sulfur host materials. How-ever, the vast majority of these host materials are not yet used for the construction of high-energy-density batteries, due to the lack of effective ways to fabricate high-performance cathodes under high-sulfur-loading conditions. Here we present a convenient and universal strategy toward traditional slurry-coating procedure for fabricating high-sulfur-loading cathodes. Through rational designing conductive additives and polymer binders, their derived water-based conductive inks are developed to improve the mechanical and conductive properties of the slurry-coating cathodes and to reduce the polysulfide shuttling of the slurry-coating cathodes with high sulfur content (64-72 wt%) and high sulfur loading ( > 5 mg cm(-2)). This strategy not only enables the Super-P/S cathodes to deliver the enhanced structure parameters and electrochemical performance for constructing a 2.5 Ah pouch cell with a specific energy of 323 Wh kg(-1), but also is suitable for diverse lab-developed sulfur hosts, thus opening a promising avenue for high-energy-density Li-S batteries.
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