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首页> 外文期刊>Advanced Functional Materials >Asymmetric Polymer Electrolyte Constructed by Metal-Organic Framework for Solid-State, Dendrite-Free Lithium Metal Battery
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Asymmetric Polymer Electrolyte Constructed by Metal-Organic Framework for Solid-State, Dendrite-Free Lithium Metal Battery

机译：由金属 - 有机骨架构建的不对称聚合物电解质，用于固态，无树枝状锂金属电池

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摘要

Solid-state polymer electrolytes (SPEs) with flexibility, easy processability, and low cost have been regarded as promising alternatives for conventional liquid electrolytes in next-generation high-safety lithium metal batteries. However, SPEs generally suffer poor strength to block Li dendrite growth during the charge/discharge process, which severely limits their wide practical applications. Here, a rational design of 3D cross-linked network asymmetric SPE modified with a metal-organic framework (MOF) layer on one side is proposed and prepared through an in-situ polymerization process. In such unique asymmetric SPEs, the nanoscale MOF layer acts as a shield that effectively suppresses the growth of Li dendrites and regulates the uniform Li(+)transport, and the polymer electrolyte can be scattered in the whole cell to endow the smooth transmission of Li+. As a result, the asymmetric SPE exhibits high ionic conductivity, wide electrochemical window, high thermal stability and safety, which endows the Li/Li symmetrical cell with outstanding cyclic stability (operate well over 800 h at a current density of 0.1 mA cm(-2)for the capacity of 0.1 mAh cm(-2)).
机译：具有柔韧性，易加工性和低成本的固态聚合物电解质（SPE）被认为是下一代高安全锂金属电池中常规液体电解质的有前途的替代品。然而，SPES通常在充电/放电过程中阻止Li Dendrite生长的强度较差，这严重限制了它们广泛的实际应用。这里，通过原位聚合方法提出并制备在一侧用金属有机框架（MOF）层改造的3D交联网络非对称SPE的合理设计。在这种独特的不对称间流层中，纳米级MOF层用作有效抑制Li枝晶的生长并调节均匀Li（+）传输的屏蔽，并且聚合物电解质可以散射在整个细胞中以赋予Li +的平滑透射率。结果，非对称SPE具有高离子电导率，宽电化学窗口，高热稳定性和安全性，其赋予Li / Li对称电池具有出色的循环稳定性（在电流密度为0.1 mA cm的电流密度超过800小时（ - 2）容量为0.1Mah cm（-2））。

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  • 来源
    《Advanced Functional Materials》 |2021年第3期|2007198.1-2007198.9|共9页
  • 作者

    Wang Guoxu; He Pingge; Fan Li-Zhen;

  • 作者单位

    Univ Sci & Technol Beijing Beijing Key Lab Adv Energy Mat & Technol Beijing Adv Innovat Ctr Mat Genome Engn Beijing 100083 Peoples R China;

    Univ Sci & Technol Beijing Beijing Key Lab Adv Energy Mat & Technol Beijing Adv Innovat Ctr Mat Genome Engn Beijing 100083 Peoples R China;

    Univ Sci & Technol Beijing Beijing Key Lab Adv Energy Mat & Technol Beijing Adv Innovat Ctr Mat Genome Engn Beijing 100083 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    asymmetric polymer electrolyte; dendrite-free Li anode; metal-organic framework; thermal stability;

    机译：不对称聚合物电解质;无牙齿免锂阳极;金属有机框架;热稳定性;

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