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首页> 外文期刊>Advanced energy materials >Ionic-Conducting and Robust Multilayered Solid Electrolyte Interphases for Greatly Improved Rate and Cycling Capabilities of Sodium Ion Full Cells
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Ionic-Conducting and Robust Multilayered Solid Electrolyte Interphases for Greatly Improved Rate and Cycling Capabilities of Sodium Ion Full Cells

机译：离子导电和鲁棒多层固体电解质间晶状体，用于大大提高钠离子全细胞的速率和循环能力

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摘要

The energy storage performance of sodium-ion batteries has been greatly improved by pairing ether-based electrolytes with high-capacity alloy-type anodes. However, the origin of this performance improvement by a unique electrode/electrolyte interface has yet to be explored. To understand such results, herein, the deterministic and distinct interfacial chemistries and solid electrolyte interphase (SEI) layers in both the ether- and ester-based electrolytes are described, as verified by post mortem, in-depth X-ray photoelectron spectroscopy, and electron energy loss spectroscopy analyses, employing a hierarchical Bi/C composite anode as the model system. In the ether-based electrolyte, fast sodium-ion storage kinetics and structural integrity are achieved due to the highly ionic-conducting and robust multi-layered SEI consisting of an inner dense bismuth-containing inorganic and outer polyether layer. No drastic capacity decay is observed over 1000 cycles and high capacity retention of 89% is achieved, increasing rates from 0.1 to 10 A g(-1). The benefit of this SEI is confirmed to demonstrate a high energy density of 162 Wh kg(-1)in a full-cell and a high areal capacity of 3.3 mAh cm(-2)even at a high mass loading of 11 mg cm(-2), which is nearly equivalent to the loading of commercial lithium-ion battery anodes.
机译：通过用高容量合金型阳极配对基于醚电解质，大大提高了钠离子电池的能量储存性能。然而，通过独特的电极/电解质接口改善这种性能改善的来源尚未探索。为了了解这种结果，本文，描述了通过后验验，深入的X射线光电子光谱和验证的基于醚和酯基电解质中的确定性和不同的界面化学和固体电解质差异（SEI）层。电子能量损失光谱分析，采用分层BI / C复合阳极作为模型系统。在基于乙醚的电解质中，由于高离子导电和鲁棒的多层SEI，可以实现快速钠离子储存动力学和结构完整性，由含内致密的含有内致密的铋无机和外聚醚层组成。没有观察到超过1000个循环的激烈容量衰减，实现了89％的高容量保留，从0.1至10Ag（-1）增加。确认该SEI的益处是在全细胞中表现出162WH kg（-1）的高能量密度，即使在11mg cm（ -2），其几乎相当于商用锂离子电池阳极的负载。

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  • 来源
    《Advanced energy materials》 |2020年第37期|2001418.1-2001418.12|共12页
  • 作者

    Yuan Haocheng; Ma Fengxin; Wei Xianbin; Lan Jin-Le; Liu Yuan; Yu Yunhua; Yang Xiaoping; Park Ho Seok;

  • 作者单位

    Beijing Univ Chem Technol Coll Mat Sci & Engn State Key Lab Organ Inorgan Composites North Third Ring Rd 15 Beijing 100029 Peoples R China|Sungkyunkwan Univ Sch Chem Engn 2066 Seobu Ro Suwon Si 440746 Gyeonggi Do Peoples R China;

    Beijing Univ Chem Technol Coll Mat Sci & Engn State Key Lab Organ Inorgan Composites North Third Ring Rd 15 Beijing 100029 Peoples R China;

    Beijing Univ Chem Technol Coll Mat Sci & Engn State Key Lab Organ Inorgan Composites North Third Ring Rd 15 Beijing 100029 Peoples R China;

    Beijing Univ Chem Technol Coll Mat Sci & Engn State Key Lab Organ Inorgan Composites North Third Ring Rd 15 Beijing 100029 Peoples R China;

    Qingdao Univ Coll Mat Sci & Engn Inst Biochem Engn State Key Lab Biofibers & Ecotext 308 Ningxia Rd Qingdao 266071 Peoples R China;

    Beijing Univ Chem Technol Coll Mat Sci & Engn State Key Lab Organ Inorgan Composites North Third Ring Rd 15 Beijing 100029 Peoples R China;

    Beijing Univ Chem Technol Coll Mat Sci & Engn State Key Lab Organ Inorgan Composites North Third Ring Rd 15 Beijing 100029 Peoples R China;

    Sungkyunkwan Univ Sch Chem Engn 2066 Seobu Ro Suwon Si 440746 Gyeonggi Do Peoples R China;

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  • 正文语种 eng
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  • 关键词

    alloy anodes; ether electrolytes; full cells; sodium ion batteries; solid electrolyte interphases;

    机译：合金阳极;乙醚电解质;全细胞;钠离子电池;固体电解质互相;

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