Journal
CHEMICAL ENGINEERING JOURNAL
Volume 427, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2021.130897
Keywords
Ag-decorated N-doped carbon; Shuttle effect; Multifunctional interlayer; Li-S batteries
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Funding
- High-level innovation and Entrepreneurship Talent introduction plan of Jiangsu Province, College Students' Training Program of Innovation and Entrepreneurship of Jiangsu Province [202011049011Z]
- Science and Technology Foundation of Huaian City [HAB202064]
- Foundation of Key Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province [HPK202004]
- Changzhou SciTech Program [CJ20200041]
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This study successfully overcomes the challenges of lithium-sulfur batteries by preparing silver-decorated nitrogen-doped carbon materials, achieving excellent electrochemical performance. It provides an effective pathway for multifunctional compounds and holds great promise in future developments of high-performance lithium-sulfur batteries.
The advances of lithium-sulfur (Li-S) batteries have long been challenged by the polysulfides shuttling and the intrinsically sluggish sulfur redox kinetics. Herein, Ag-decorated N-doped carbon (Ag-CNx) is prepared through magnesiothermic reduction followed by a silver mirror reaction. Attributed to the high conductivity, porous architecture, strong absorbability, and catalytic effect, the as-developed Ag-CNx, as an interlayer material in Li-S configuration, well confines active species within the cathodic side and simultaneously promotes the sulfur conversions bidirectionally to the final S/Li2S product. As a result, fast and durable Li-S electrochemistry can be realized, exhibiting excellent cyclability over 550 cycles, superb rate capability up to 5C, and decent areal capacity of 4.8 mAh cm-2 under raised sulfur loading of 4.1 mg cm-2. This work provides a facile and effective pathway toward multifunctional that combines chemical binding and electrocatalysis, holding great promise in future development of high-performance Li-S batteries.
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