锂离子电池再生石墨负极作为锂硫电池主体材料

Sukanya, Frederik Bettels, Fei Ding, Lin Zhang* and René Wilhelm*, 
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引用次数: 0

摘要

对高能存储系统的需求日益增长,特别是在电动汽车和航空航天领域,锂硫电池因其优越的能量密度和丰富的硫的使用而备受关注,为传统锂离子(Li-ion)电池提供了可持续的替代品。然而,诸如“穿梭效应”和由硫基电极体积膨胀引起的机械不稳定性等关键挑战阻碍了它们的实际应用。最近的发展主要集中在碳硫复合阴极上,采用石墨烯等材料,尽管能源和成本都很高。创新研究从废物中探索可持续的碳质材料,如再生纸和棉织物,提高电化学性能,但需要昂贵的活化和碳化过程。为了解决这些限制,本研究研究了使用废旧锂离子电池的再生石墨作为硫宿主。我们成功地通过H2SO4:HNO3或甲烷磺酸(MSA)等酸处理来修饰石墨的结构和官能团,以增强多硫吸附,减少体积膨胀,减轻穿梭效应。我们的方法绕过了传统的能源密集型工艺,突出了环保和成本效益高的锂电池技术升级材料的潜力,从而促进了它们的可持续发展。这项研究通过回收旧电池中的石墨,减少浪费和对环境的影响,同时提高锂硫电池的可持续储能性能,从而推动了环保电池技术的发展。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Recycled Graphite Anode from Li-Ion Batteries as Host Material in Li–S Batteries

The increasing demand for high-energy storage systems, particularly in electric vehicles and aerospace, has spotlighted lithium–sulfur (Li–S) batteries due to their superior energy density and use of abundant sulfur, offering a sustainable alternative to traditional lithium-ion (Li-ion) batteries. However, critical challenges such as the ‘shuttle effect’ and mechanical instability resulting from volume expansions of sulfur-based electrodes impede their practical application. Recent developments primarily focus on carbon–sulfur composite cathodes, employing materials like graphene, albeit at high energy and cost. Innovative research explores sustainable carbonaceous materials from waste, such as recycled paper and cotton fabric, enhancing electrochemical performance but requiring costly activation and carbonization processes. In addressing these limitations, this study investigates using recycled graphite from spent Li-ion batteries as a sulfur host. We successfully modify graphite’s structure and functional groups by employing acid treatments with H2SO4:HNO3 or methanesulfonic acid (MSA) to enhance polysulfide adsorption, reduce volume expansion, and mitigate the shuttle effect. Our approach bypasses traditional energy-intensive processes, highlighting the potential of upcycled materials for eco–friendly and cost-effective Li–S battery technologies, thus contributing to their sustainable advancement.

This research advances eco-friendly battery technology by recycling graphite from old batteries, reducing waste and environmental impact while enhancing the performance of lithium−sulfur batteries for sustainable energy storage.

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