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In this section, you can access to the latest technical information related to the FUTURE project topic.
Enhancing the adsorption and catalytic conversion of polysulfides by nitrogen doped carbon micro-flowers embedded with Mo2C nanoparticles
Synthesis of hybrid architectures for sulfur host materials has been certificated as an efficient way to enhance the performances of lithium-sulfur (Li?S) batteries owing to the generated synergetic effects from each component. However, it remains challenging to construct hybrid nanostructures with reasonable structure and rational composition to achieve high-performance of Li?S batteries. Here, a coordinated nanostructure constituted of the Mo2C nanoparticles embedded in the micro-flowered high content N-doped (11.73?at.%) carbon substrate (Mo2[email protected]) is synthesized via using protonated g-C3N4 as the template, which is used as the sulfur host for Li?S batteries. Owing to the physical entrapment from the porous carbon substrate with special micro-flower morphology, and the synergistic chemisorption from pyridine N sites and polar Mo2C nanoparticles, the as-prepared Mo2[email protected] can afford a high content of sulfur loading and enables fast/reliable sulfur electrochemistry. Given these, the Mo2[email protected] based cathode with a high sulfur content of 76% delivers a high initial discharge capacity of 1403.7 mAh g?1 at 0.1?C. Even at a high rate of 2.0?C, it still shows desirable electrochemical performances with an initial capacity of 910.6 mAh g?1 and superb cycling stability with an average capacity decay rate of only 0.001% per cycle over 500 cycles. Moreover, upon a high sulfur loading of 5.5?mg?cm ?2, the Mo2[email protected]/S cathode can still maintain decent sulfur related electrochemistry and achieves a high areal capacity of 5.56 mAh cm?2 with excellent stability. It is expected this work provides a new perspective to the rational design of conductive and polar material that suitable for high-efficiency and long-lasting Li?S batteries.
» Author: Wei Zhou, Dengke Zhao, Qikai Wu, Bin Fan, Xiaojing Zhu, Jiacheng Dan, Nanwen Li, Wen Lei, Ligui Li
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Project Management department - Sustainability and Industrial Recovery
life-future-project@aimplas.es