花生粕中掺氮多孔碳实现高性能锂硒电池

IF 6.1 3区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Xiangyu Xu, Linyue Li, Sheng Yu, Siao Zhu, Hannah M. Johnson, Yunlei Zhou, Fei Gao, Linfang Wang, Zhoulu Wang, Yutong Wu, Xiang Liu, Yi Zhang, Shan Jiang
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引用次数: 0

摘要

生物质衍生多孔碳由于其绿色资源和固有的结构优势,在锂硒电池中显示出巨大的潜力,可以有效地限制Se阴极的穿梭效应。花生油萃取副产物花生粕是一种很有前途的氮掺杂多孔碳前驱体。然而,由于花生粉的高疏水性,在溶液中很难被活化。因此,花生粕衍生多孔碳用作锂硒电池正极主体的研究尚无报道。在这项工作中,我们创新地提出了一种非常简单的激活花生粉的方法,即直接用花生粉物理研磨激活剂,然后退火将其转化为具有丰富纳米级孔径结构的氮掺杂三维多孔碳(N-PC),然后将其用作Li-Se电池的Se主体。N-PC的比表面积高达938.872 m2 g−1。Se/N-PC复合阴极在0.2℃下循环250次,比容量为461.4 mA h g−1,相当于97.2%的高容量保留率。此外,在2℃的高电流密度下,Se/N-PC复合材料在1000次循环后仍保持超过340.1 mA h g−1的高容量,有效地解决了疏水生物质活化问题,为Li-Se电池制造了丰富且低成本的Se宿主。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
High-performance lithium–selenium batteries enabled by nitrogen-doped porous carbon from peanut meal
Abstract Biomass-derived porous carbon displays a great potential for lithium–selenium (Li–Se) batteries owing to its green resource and inherent structural advantages, which can effectively restrict the shuttle effect of Se cathode. Peanut meal, by-product of the extraction of peanut oil, is a promising precursor for N-doped porous carbon. However, peanut meal is difficult to be activated in solution due to its high hydrophobicity. Thus, non-reports have been available for peanut meal-derived porous carbon used as Li–Se battery cathode host. In this work, we have innovatively proposed a very simple method of activating peanut meal by directly physically grinding the activator with the peanut meal and then annealing it to convert it into nitrogen-doped three-dimensional porous carbon (N-PC) with rich nanoscale pore size structures, which is then used as the Se host for Li–Se batteries. The N-PC shows a high specific surface area of 938.872 m 2 g −1 . The Se/N-PC composite cathode delivers a specific capacity of 461.4 mA h g −1 for 250 cycles at 0.2 C, corresponding to a high-capacity retention of 97.2%. Moreover, the Se/N-PC composite maintains a high capacity over 340.1 mA h g −1 after 1,000 cycles at a high current density of 2 C. Our work effectively resolves the hydrophobic biomass activation problem and manufactures abundant and low-cost Se host for Li–Se batteries.
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来源期刊
Nanotechnology Reviews
Nanotechnology Reviews CHEMISTRY, MULTIDISCIPLINARY-NANOSCIENCE & NANOTECHNOLOGY
CiteScore
11.40
自引率
13.50%
发文量
137
审稿时长
7 weeks
期刊介绍: The bimonthly journal Nanotechnology Reviews provides a platform for scientists and engineers of all involved disciplines to exchange important recent research on fundamental as well as applied aspects. While expert reviews provide a state of the art assessment on a specific topic, research highlight contributions present most recent and novel findings. In addition to technical contributions, Nanotechnology Reviews publishes articles on implications of nanotechnology for society, environment, education, intellectual property, industry, and politics.
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