Microcrystalline reconfiguration assisted pore structure regulation towards high performance coal-derived hard carbon anodes for sodium-ion batteries

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering Pub Date : 2025-04-26 DOI:10.1016/j.compositesb.2025.112562

Zeren Zhou , Zhijiang Wang , Yixiang Zhang , Qiaoyan Lin , Qinghe Jing , Shouqing Yan , Jie Guo , Yong Shuai , Lishuang Fan

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Abstract

Hard carbon (HC) is regarded as a highly promising anode material for sodium-ion batteries (SIBs) due to its low cost and excellent performance. However, low initial coulombic efficiency (ICE) and sodium storage capacity hinder its development. Closed pore structures are considered an effective strategy to improve ICE and the capacity of hard carbon. Nonetheless, template agents are unavoidable in the closed pores creation process, and more steps lead to low productivity. Herein, turbostratic microcrystalline structures and abundant closed pores are induced without additional template agents via a self-reconfiguration strategy inspired by the plant stomata bionic structure. Benefiting from closed pores formation, ICE and Na⁺ storage specific capacity are improved to 85 % and 341 mAh∙g⁻¹ (HC-PC) significantly, compared with HC-C (79 %, 250 mAh∙g⁻¹). HC-PC also exhibits an outstanding capacity retention ratio of 96.9 % (0.3 A g⁻¹) and 91.3 % (1 A g⁻¹) after 1000 cycles.

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微晶重构对钠离子电池高性能煤基硬碳阳极孔结构调控的影响

硬碳以其低廉的成本和优异的性能被认为是一种极具发展前景的钠离子电池负极材料。但初始库仑效率（ICE）低、储钠容量小，阻碍了其发展。封闭孔隙结构被认为是提高硬碳的ICE和容量的有效策略。然而，模板剂在闭合孔的创建过程中是不可避免的，步骤多导致生产率低。在此，受植物气孔仿生结构的启发，通过自重构策略，无需额外的模板剂即可诱导出涡轮微晶结构和丰富的封闭孔隙。与HC-C （79%, 250 mAh∙g−1）相比，HC-PC的ICE和Na+存储比容量显著提高至85%和341 mAh∙g−1。在1000次循环后，HC-PC的容量保持率分别为96.9% （0.3 A g−1）和91.3% （1 A g−1）。

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来源期刊

Composites Part B: Engineering 工程技术-材料科学：复合

CiteScore

24.40

自引率

11.50%

发文量

784

审稿时长

21 days

期刊介绍： Composites Part B: Engineering is a journal that publishes impactful research of high quality on composite materials. This research is supported by fundamental mechanics and materials science and engineering approaches. The targeted research can cover a wide range of length scales, ranging from nano to micro and meso, and even to the full product and structure level. The journal specifically focuses on engineering applications that involve high performance composites. These applications can range from low volume and high cost to high volume and low cost composite development. The main goal of the journal is to provide a platform for the prompt publication of original and high quality research. The emphasis is on design, development, modeling, validation, and manufacturing of engineering details and concepts. The journal welcomes both basic research papers and proposals for review articles. Authors are encouraged to address challenges across various application areas. These areas include, but are not limited to, aerospace, automotive, and other surface transportation. The journal also covers energy-related applications, with a focus on renewable energy. Other application areas include infrastructure, off-shore and maritime projects, health care technology, and recreational products.