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首页> 外文期刊>Advanced energy materials >LiF-Induced Stable Solid Electrolyte Interphase for a Wide Temperature SnO_2-Based Anode Extensible to −50°C
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LiF-Induced Stable Solid Electrolyte Interphase for a Wide Temperature SnO_2-Based Anode Extensible to −50°C

机译：LiF诱导的稳定固体电解质相互作用，用于宽温度SnO_2的阳极可伸长至-50°C

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摘要

Lithium-ion batteries (LIBs) suffer dramatic energy reduction, and are even unable to safely charge below -10 degrees C, due to sluggish Li+ transport kinetics in the anode, electrolyte and solid electrolyte interphase (SEI), as well as large overpotential which causes Li plating on the anode surface. Herein, a SnO2-LiF-graphite (SLG) composite anode is developed for wide temperature application. The SLG with a propylene carbonate electrolyte delivers a stable capacity of more than 900 mA h g(-1) at 60 degrees C with 100 mA g(-1), maintaining 823.9 mA h g(-1) at -10 degrees C. When matched with a tetrahydrofuran-based electrolyte, the SLG delivers stable capacities of 780.4 mA h g(-1) at -40 degrees C and 637.2 mA h g(-1) at -50 degrees C, respectively. It is demonstrated that the LiF-induced inorganic-rich SEI maintains the nanostructure of the active Sn, and that their interfaces with the electrolyte are highly stable. Furthermore, the formation of alpha-Sn with higher Li+ diffusion kinetics results in a very small overpotential (approximate to 0.18 V) of lithiation for SLG from 30 degrees C to -50 degrees C. This work shows that LiF-modified SnO2 anodes matched with suitable electrolytes can qualify the LIBs for a safe and long-life at wide temperature, which is helpful to further promote these batteries for low-temperature applications.
机译：锂离子电池（LIBS）遭受显着的能量，甚至不能安全地充电，由于阳极，电解质和固体电解质相互作用（SEI）中的Li +运输动力学缓慢，以及大型过电位导致锂电镀在阳极表面上。在此，开发了SNO2-LIF-石墨（SLG）复合阳极，用于宽温度施加。具有丙烯碳酸亚丙酯电解质的SLG在60摄氏度下以100mAg（-1）的60℃以超过900mA hg（-1）的稳定容量，在-10℃下保持823.9 mA Hg（-1）。当匹配时通过四氢呋喃基电解质，SLG分别在-50℃下在-40℃和637.2mA Hg（-1）下提供780.4 mA Hg（-1）的稳定容量。证明LiF诱导的富含无机的SEI保持活性Sn的纳米结构，并且它们与电解质的界面非常稳定。此外，具有较高的Li +扩散动力学的α-Sn的形成导致SLG的SLG锂的非常小的过电位（近似为0.18V），从30摄氏度到-50℃。这项工作表明，Lif改性的SnO2阳极与合适的电解质可以在宽温度下符合安全和长寿命的Libs，这有助于进一步推广这些电池进行低温应用。

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  • 来源
    《Advanced energy materials》 |2021年第39期|2101855.1-2101855.12|共12页
  • 作者

    Tan Liang; Lan Xuexia; Chen Jinwei; Zhang Hanyin; Hu Renzong; Zhu Min;

  • 作者单位

    South China Univ Technol Guangdong Prov Key Lab Adv Energy Storage Mat Sch Mat Sci & Engn Guangzhou 510640 Peoples R China|Hengyang Normal Univ Sch Chem & Mat Sci Hengyang 421008 Hunan Peoples R China;

    South China Univ Technol Guangdong Prov Key Lab Adv Energy Storage Mat Sch Mat Sci & Engn Guangzhou 510640 Peoples R China;

    South China Univ Technol Guangdong Prov Key Lab Adv Energy Storage Mat Sch Mat Sci & Engn Guangzhou 510640 Peoples R China;

    South China Univ Technol Guangdong Prov Key Lab Adv Energy Storage Mat Sch Mat Sci & Engn Guangzhou 510640 Peoples R China;

    South China Univ Technol Guangdong Prov Key Lab Adv Energy Storage Mat Sch Mat Sci & Engn Guangzhou 510640 Peoples R China;

    South China Univ Technol Guangdong Prov Key Lab Adv Energy Storage Mat Sch Mat Sci & Engn Guangzhou 510640 Peoples R China;

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

    Li-ion batteries; low temperature charging; overpotential; tin oxides;

    机译：锂离子电池;低温充电;过电容;氧化锡;

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