N-doped activated carbons from leather waste produced by microwave activation for use as the cathode of Li-S batteries

IF 5.7 3区材料科学 Q2 Materials Science

New Carbon Materials Pub Date : 2025-04-01 DOI:10.1016/S1872-5805(25)60958-9

Pano-Azucena Carolina , Rosas-Rangel Roberto , Olvera-Sosa Miguel , Salvador González-González David , Rangel-Mendez Rene , Felipe Chazaro-Ruiz Luis , Avalos-Borja Miguel , Antonio Arcibar-Orozco Javier

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Abstract

The use of carbon from waste biomass has the potential to eliminate the drawbacks of Li-S batteries and improve their overall performance. Chrome-tanned-leathershavings (CTLS) are a readily available waste product that can be transformed into porous carbon. We prepared an activated carbon by microwave pyrolysis combined with KOH activator using the CTLS as starting materials. The carbon had a specific surface area of 556 m²g⁻¹ and a honeycomb-like structure. Two kinds of N-doped activated carbons were then synthesized by thermal decomposition of the activated carbon, either combined with urea, or impregnated with ethanolamine. Both N-doped activated carbons have an increased number of nitrogen and amine surface groups. However, only the urea treatment was effective in improving the initial capacity of the cell (1363 mAh g⁻¹), which is probably linked to the sorption of long-chain polysulfides. This investigation confirms that it is possible to use the thermal decomposition of urea to obtain carbon materials from CTLS for use as the sulfur-host cathode in Li-S batteries and improve their performance. A radial basis function neural network was fitted to provide statistical support for the experimental results, which confirmed the importance of the nitrogen content of the carbons in determining the discharge capacity of the cells.

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用微波活化法制备的皮革废氮掺杂活性炭作为锂硫电池正极材料

利用废弃生物质中的碳有可能消除锂硫电池的缺点，并提高其整体性能。铬鞣皮革屑（CTLS）是一种容易获得的废物，可以转化为多孔碳。以CTLS为原料，采用微波热解结合KOH活化剂制备活性炭。碳的比表面积为556 m2 - 1，具有蜂窝状结构。采用热分解法制备了两种n掺杂活性炭，分别与尿素结合和乙醇胺浸渍。两种n掺杂活性炭表面的氮和胺基团数量都有所增加。然而，只有尿素处理能有效提高电池的初始容量（1363 mAh g−1），这可能与长链多硫化物的吸附有关。该研究证实了利用尿素热分解从CTLS中获得碳材料作为Li-S电池的硫主阴极并提高其性能的可能性。采用径向基函数神经网络对实验结果进行了统计支持，证实了碳的含氮量对电池放电容量的影响。下载：下载高分辨率图片（159KB）下载：下载全尺寸图片

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来源期刊

New Carbon Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

6.10

自引率

8.80%

发文量

3245

审稿时长

5.5 months

期刊介绍： New Carbon Materials is a scholarly journal that publishes original research papers focusing on the physics, chemistry, and technology of organic substances that serve as precursors for creating carbonaceous solids with aromatic or tetrahedral bonding. The scope of materials covered by the journal extends from diamond and graphite to a variety of forms including chars, semicokes, mesophase substances, carbons, carbon fibers, carbynes, fullerenes, and carbon nanotubes. The journal's objective is to showcase the latest research findings and advancements in the areas of formation, structure, properties, behaviors, and technological applications of carbon materials. Additionally, the journal includes papers on the secondary production of new carbon and composite materials, such as carbon-carbon composites, derived from the aforementioned carbons. Research papers on organic substances will be considered for publication only if they have a direct relevance to the resulting carbon materials.