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首页> 外文期刊>Advanced energy materials >SiO_2 Hollow Nanosphere-Based Composite Solid Electrolyte for Lithium Metal Batteries to Suppress Lithium Dendrite Growth and Enhance Cycle Life
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SiO_2 Hollow Nanosphere-Based Composite Solid Electrolyte for Lithium Metal Batteries to Suppress Lithium Dendrite Growth and Enhance Cycle Life

机译：用于锂金属电池的SiO_2基于空心的纳米层基固体电解质抑制锂枝晶生长和增强循环寿命

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摘要

The low Coulombic efficiency and serious security issues of lithium (Li) metal anode caused by uncontrollable Li dendrite growth have permanently prevented its practical application. A novel SiO2 hollow nanosphere-based composite solid electrolyte (SiSE) for Li metal batteries is reported. This hierarchical electrolyte is fabricated via in situ polymerizing the tripropylene gycol diacrylate (TPGDA) monomer in the presence of liquid electrolyte, which is absorbed in a SiO2 hollow nanosphere layer. The polymerized TPGDA framework keeps the prepared SiSE in a quasi-solid state without safety risks caused by electrolyte leakage, meanwhile the SiO2 layer not only acts as a mechanics-strong separator but also provides the SiSE with high room-temperature ionic conductivity (1.74 x 10(-3) S cm(-1)) due to the high pore volume (1.49 cm(3) g(-1)) and large liquid electrolyte uptake of SiO2 hollow nanospheres. When the SiSE is in situ fabricated on the cathode and applied to LiFePO4/SiSE/Li batteries, the obtained cells show a significant improvement in cycling stability, mainly attributed to the stable electrode/electrolyte interface and remarkable suppression for Li dendrite growth by the SiSE. This work can extend the application of hollow nanooxide and enable a safe, efficient operation of Li anode in next generation energy storage systems.
机译：由无法控制的Li Dendrite生长引起的锂（Li）金属阳极的低库仑效率和严重的安全问题已永久防止其实际应用。据报道了一种新型SiO2中空纳米环基复合材料固体电解质（SISE）用于LI金属电池。在液体电解质存在下，通过原位制造该层级电解质通过在液体电解质存在下，在SiO 2中空纳米层层中被吸收，该等级电解质在原位中聚合偶乙二醇二丙烯酸酯（TPGDA）单体。聚合的TPGDA框架将准备好的表达在拟固状态下，没有由电解质泄漏引起的安全风险，同时SiO2层不仅用作力学强的分离器，而且还提供高室温离子电导率的大观（1.74 x 10（-3）S cm（-1））由于高孔体积（1.49cm（3）克（-1））和SiO 2中空纳米球的大液体电解质吸收。当大观原位制造在阴极上并施加到LiFepo4 / Sise / Li电池时，所获得的细胞显示出循环稳定性的显着改善，主要归因于稳定的电极/电解质界面和李枝晶的增长显着抑制。这项工作可以扩展中空纳米氧化物的应用，并在下一代储能系统中能够安全，有效地运行LI阳极。

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  • 来源
    《Advanced energy materials》 |2016年第7期|1502214.1-1502214.10|共10页
  • 作者

    Zhou Dong; Liu Ruliang; He Yan-Bing; Li Fengyun; Liu Ming; Li Baohua; Yang Quan-Hong; Cai Qiang; Kang Feiyu;

  • 作者单位

    Tsinghua Univ Grad Sch Shenzhen Natl Local Joint Engn Lab Carbon Funct Mat Shenzhen 518055 Peoples R China|Tsinghua Univ Dept Mat Sci & Engn State Key Lab New Ceram & Fine Proc Beijing 100084 Peoples R China|Tsinghua Univ Dept Mat Sci & Engn Key Lab Adv Mat MOE Beijing 100084 Peoples R China;

    Tsinghua Univ Grad Sch Shenzhen Natl Local Joint Engn Lab Carbon Funct Mat Shenzhen 518055 Peoples R China;

    Tsinghua Univ Grad Sch Shenzhen Natl Local Joint Engn Lab Carbon Funct Mat Shenzhen 518055 Peoples R China;

    Tsinghua Univ Dept Mat Sci & Engn State Key Lab New Ceram & Fine Proc Beijing 100084 Peoples R China|Tsinghua Univ Dept Mat Sci & Engn Key Lab Adv Mat MOE Beijing 100084 Peoples R China|China Acad Engn Phys Inst Mat Mianyang 621900 Peoples R China;

    Tsinghua Univ Grad Sch Shenzhen Natl Local Joint Engn Lab Carbon Funct Mat Shenzhen 518055 Peoples R China;

    Tsinghua Univ Grad Sch Shenzhen Natl Local Joint Engn Lab Carbon Funct Mat Shenzhen 518055 Peoples R China;

    Tsinghua Univ Grad Sch Shenzhen Natl Local Joint Engn Lab Carbon Funct Mat Shenzhen 518055 Peoples R China;

    Tsinghua Univ Dept Mat Sci & Engn State Key Lab New Ceram & Fine Proc Beijing 100084 Peoples R China|Tsinghua Univ Dept Mat Sci & Engn Key Lab Adv Mat MOE Beijing 100084 Peoples R China;

    Tsinghua Univ Grad Sch Shenzhen Natl Local Joint Engn Lab Carbon Funct Mat Shenzhen 518055 Peoples R China|Tsinghua Univ Dept Mat Sci & Engn State Key Lab New Ceram & Fine Proc Beijing 100084 Peoples R China|Tsinghua Univ Dept Mat Sci & Engn Key Lab Adv Mat MOE Beijing 100084 Peoples R China;

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