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首页> 外文期刊>Advanced Functional Materials >Elevated Lithium Ion Regulation by a 'Natural Silk' Modified Separator for High-Performance Lithium Metal Anode
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Elevated Lithium Ion Regulation by a 'Natural Silk' Modified Separator for High-Performance Lithium Metal Anode

机译：“天然丝”改性分离器高性能锂金属阳极升高的锂离子调节

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摘要

Metallic lithium anode has long stood as the "holy grail" in the field of secondary batteries for its high theoretical specific capacity and low electrochemical potential. But its edge is blunted by the inherent uncontrolled lithium dendrite growth that can curtail the cycle life and raise safety concerns. In this work, a functional modification layer from a derivant of natural silk is developed to protect lithium anode via a facile automatic transfer route. Via offering abundant functional group sites, the Li-ion flux on the anode surface is made uniform efficiently. The silk fibroin-based modification layer also contributes to the in situ formation of a Li3N-rich solid electrolyte interphase film on the lithium anode. Consequently, a high-performance lithium metal anode with dendrite-free morphology and significantly enhanced cycle stability is achieved: when paired with LiFePO4 cathodes, the full cell achieves a long-term cycling stability of 3000 cycles at 5 C; when paired with sulfur cathodes (5 mg(sulfur) cm(-2)), a long lifespan for over 400 cycles at 1 C is achieved. This work offers a facile and practical approach for the interface modification of the high-performance lithium anode and as well as provides a new perspective for the application of biomass-based materials in advanced batteries.
机译：金属锂阳极长长的代表，作为二次电池领域的“圣杯”，其高理论特异性容量和低电化学潜力。但它的边缘被固有的不受控制的锂枝晶生长钝化，可以缩短循环寿命并提高安全问题。在这项工作中，开发了来自天然丝的衍生体的功能改性层以通过容易自动转移路线保护锂阳极。通过提供丰富的功能组位点，阳极表面上的锂离子通量有效地均匀。丝素蛋白的改性层还有助于在锂阳极上致原位形成Li3N的固体电解质互相膜。因此，实现了具有树突形态的高性能锂金属阳极和显着增强的循环稳定性：与LiFePO4阴极配对时，全细胞在5℃下达到3000次循环的长期循环稳定性;当与硫阴极配对（5mg（硫）cm（-2））时，实现了在1℃下超过400次循环的寿命。这项工作提供了一种适用于高性能锂阳极的界面改性的容易和实用的方法，并为在先进电池中施加生物质基材料提供了新的视角。

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  • 来源
    《Advanced Functional Materials》 |2021年第18期|2100537.1-2100537.8|共8页
  • 作者

    Li Xiang; Yuan Lixia; Liu Dezhong; Liao Mengyi; Chen Jie; Yuan Kai; Xiang Jingwei; Li Zhen; Huang Yunhui;

  • 作者单位

    Huazhong Univ Sci & Technol Sch Mat Sci & Engn State Key Lab Mat Proc & Die & Mold Technol Wuhan 430074 Peoples R China;

    Huazhong Univ Sci & Technol Sch Mat Sci & Engn State Key Lab Mat Proc & Die & Mold Technol Wuhan 430074 Peoples R China;

    Huazhong Univ Sci & Technol Sch Mat Sci & Engn State Key Lab Mat Proc & Die & Mold Technol Wuhan 430074 Peoples R China;

    Huazhong Univ Sci & Technol Sch Mat Sci & Engn State Key Lab Mat Proc & Die & Mold Technol Wuhan 430074 Peoples R China;

    Huazhong Univ Sci & Technol Sch Mat Sci & Engn State Key Lab Mat Proc & Die & Mold Technol Wuhan 430074 Peoples R China;

    Huazhong Univ Sci & Technol Sch Mat Sci & Engn State Key Lab Mat Proc & Die & Mold Technol Wuhan 430074 Peoples R China;

    Huazhong Univ Sci & Technol Sch Mat Sci & Engn State Key Lab Mat Proc & Die & Mold Technol Wuhan 430074 Peoples R China;

    Huazhong Univ Sci & Technol Sch Mat Sci & Engn State Key Lab Mat Proc & Die & Mold Technol Wuhan 430074 Peoples R China;

    Huazhong Univ Sci & Technol Sch Mat Sci & Engn State Key Lab Mat Proc & Die & Mold Technol Wuhan 430074 Peoples R China;

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  • 正文语种 eng
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  • 关键词

    lithium anode; lithium metal batteries; polyvinyl alcohol; separator modification; silk fibroin;

    机译：锂阳极;锂金属电池;聚乙烯醇;分离器改性;丝素蛋白;

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