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首页> 外文期刊>Advanced energy materials >In Situ Subangstrom-Thick Organic Engineering EnablesMono-scale, Ultrasmall ZnO Nanocrystals for a High Initial Coulombic Efficiency, Fully Reversible Conversion, and Cycle-Stable Li-Ion Storage
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In Situ Subangstrom-Thick Organic Engineering EnablesMono-scale, Ultrasmall ZnO Nanocrystals for a High Initial Coulombic Efficiency, Fully Reversible Conversion, and Cycle-Stable Li-Ion Storage

机译：原位潜水跨厚的有机工程能够实现单量级，超大ZnO纳米晶体，用于高初始的库仑效率，完全可逆转换，以及循环稳定的锂离子储存

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摘要

A solid electrolyte interphase (SEI)-free surface and fully reversible conversion are simultaneously realized in the Li-ion storage of a specially designed ZnO porous nanocomposite with in situ surfaces/interfaces organic encapsulation for the first time. The built-in oxygen- and/or moisture-isolating organic layer of subangstrom thickness not only avoids the SEI formation, but also guarantees monodisperse and ultrasmall dimensions of ZnO nanocrystals, which are crucial for the high initial Coulombic efficiency (ICE) and fully reversible conversion. Benefiting from the high ICE up to 91.4%, stable long-term cyclibility (95% capacity retention at 1 A g(-1) after 1400 cycles), and no sacrificing Li-ion storage capability (868 mAh g(-1) at 0.1 A g(-1)), the ZnO nanocomposite demonstrates the highest initial Li-ion utilization efficiency (ILUE, approximate to 85.4%) among previous transition metal oxide-based full cells.
机译：在专用设计的ZnO多孔纳米复合材料的锂离子储存中同时实现固体电解质间（SEI） - 完全可逆转换，首次具有原位表面/接口有机包封。亚突厚度的内置氧气和/或水分隔离有机层不仅避免了SEI形成，而且还可以保证ZnO纳米晶体的单分散和超大尺寸，这对于高初始初始库仑效率（冰）至关重要，并且完全可逆转换。受益于高冰高达91.4％，长期残障率稳定（在1400次循环后的95％容量保留），没有牺牲锂离子储存能力（868mAhg（-1） 0.1Ag（-1）），ZnO纳米复合材料在以前的基于过渡金属氧化物的全细胞中显示出最高初始锂离子利用效率（ILUE，近似为85.4％）。

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  • 来源
    《Advanced energy materials》 |2019年第19期|1900426.1-1900426.8|共8页
  • 作者

    Song Huawei; Su Jian; Wang Chengxin;

  • 作者单位

    Sun Yat Sen Zhongshan Univ Sch Mat Sci & Engn Key Lab Low Carbon Chem & Energy Conservat Guangd State Key Lab Optoelect Mat & Technol Guangzhou 510275 Guangdong Peoples R China;

    Sun Yat Sen Zhongshan Univ Sch Mat Sci & Engn Key Lab Low Carbon Chem & Energy Conservat Guangd State Key Lab Optoelect Mat & Technol Guangzhou 510275 Guangdong Peoples R China;

    Sun Yat Sen Zhongshan Univ Sch Mat Sci & Engn Key Lab Low Carbon Chem & Energy Conservat Guangd State Key Lab Optoelect Mat & Technol Guangzhou 510275 Guangdong Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    initial Coulombic efficiency; lithium-ion storage; reversible conversion; surfaces; interfaces engineering; ZnO nanocrystals;

    机译：初始库仑效率;锂离子储存;可逆转换;表面;界面工程;ZnO纳米晶;

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