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首页> 外文期刊>Advanced energy materials >Interweaving 3D Network Binder for High-Areal-Capacity Si Anode through Combined Hard and Soft Polymers
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Interweaving 3D Network Binder for High-Areal-Capacity Si Anode through Combined Hard and Soft Polymers

机译：通过组合硬质和软聚合物对3D网络粘合剂进行高级容量Si阳极

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摘要

Si anodes suffer an inherent volume expansion problem. The consensus is that hydrogen bonds in these anodes are preferentially constructed between the binder and Si powder for enhanced adhesion and thus can improve cycling performance. There has been little research done in the field of understanding the contribution of the binder's mechanical properties to performance. Herein, a simple but effective strategy is proposed, combining hard/soft polymer systems, to exploit a robust binder with a 3D interpenetrating binding network (3D-IBN) via an in situ polymerization. The 3D-IBN structure is constructed by interweaving a hard poly(furfuryl alcohol) as the skeleton with a soft polyvinyl alcohol (PVA) as the filler, buffering the dramatic volume change of the Si anode. The resulting Si anode delivers an areal capacity of 10 mAh cm(-2) and enables an energy density of 300 Wh kg(-1) in a full lithium-ion battery (LIB) cell. The component of the interweaving binder can be switched to other polymers, such as replacing PVA by thermoplastic polyurethane and styrene butadiene styrene. Such a strategy is also effective for other high-capacity electroactive materials, e.g., Fe2O3 and Sn. This finding offers an alternative approach in designing high-areal-capacity electrodes through combined hard and soft polymer binders for high-energy-density LIBs.
机译：SI阳极遭受固有的卷展开问题。共有共有是这些阳极中的氢键优先于粘合剂和Si粉末之间构建，以提高粘附性，从而可以提高循环性能。在理解粘合剂的机械性能与性能的贡献领域，已经有很少的研究。这里，提出了一种简单但有效的策略，组合硬/软聚合物系统，通过原位聚合利用3D穿透结合网络（3D-IBN）利用鲁棒粘合剂。通过将硬聚乙醇（PVA）相互骨架以作为填料的骨架（PVA）交织，通过将硬聚乙醇（PVA）交织，缓冲Si阳极的剧烈变化来构建3D-IBN结构。所得到的Si阳极可提供> 10mahcm（-2）的面积容量，使得能够在全锂离子电池（Lib）细胞中的> 300WH kg（-1）的能量密度。可以将交织粘合剂的组分切换到其他聚合物，例如通过热塑性聚氨酯和苯乙烯丁二烯苯乙烯替换PVA。这种策略对于其他高容量的电活性物质，例如Fe2O3和Sn也是有效的。该发现提供了一种替代方法，用于通过组合的硬质和软聚合物粘合剂来设计高能的高能密度LIBS的替代方法。

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  • 来源
    《Advanced energy materials》 |2019年第3期|1802645.1-1802645.9|共9页
  • 作者

    Liu Tiefeng; Chu Qiaoling; Yan Cheng; Zhang Shanqing; Lin Zhan; Lu Jun;

  • 作者单位

    Guangdong Univ Technol Sch Chem Engn & Light Ind Guangzhou 510006 Guangdong Peoples R China|Griffith Univ Sch Environm & Sci Ctr Clean Environm & Energy Gold Coast Campus Gold Coast Qld 4222 Australia;

    QUT Sch Chem Phys & Mech Engn Sci & Engn Fac Brisbane Qld 4001 Australia;

    QUT Sch Chem Phys & Mech Engn Sci & Engn Fac Brisbane Qld 4001 Australia;

    Griffith Univ Sch Environm & Sci Ctr Clean Environm & Energy Gold Coast Campus Gold Coast Qld 4222 Australia;

    Guangdong Univ Technol Sch Chem Engn & Light Ind Guangzhou 510006 Guangdong Peoples R China;

    Argonne Natl Lab Chem Sci & Engn Div 9700 Cass Ave Lemont IL 60439 USA;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    3D network binders; hard and soft polymers; high areal capacity; lithium-ion batteries; Si anodes;

    机译：3D网络粘合剂;硬质和软聚合物;高面积容量;锂离子电池;SI阳极;

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