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Radiation effects on the electrode and electrolyte of a lithium-ion battery

机译:辐射对锂离子电池的电极和电解质的影响

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摘要

The performance degradation and durability of a Li-ion battery is a major concern when it is operated under radiation conditions, for instance, in deep space exploration, in high radiation field, or rescuing or sampling equipment in a post-nuclear accident scenario. This paper examines the radiation effects on the electrode and electrolyte materials separately and their effects on a battery's capacity loss and resistance increase. A(60)Co irradiator (34.3 krad/h) was used to provide 0.8, 4.1, and 9.8 Mrad dose to LiFePO4 electrodes and 0.8,1.6, and 5.7 Mrad to 1 M LiPF6 in 1:1 wt% EC:DMC electrolytes. This study shows that the coin cells assembled with irradiated components have higher failure rate (ca. 70%) than that of control group (ca. 14%). A significant battery capacity fade post irradiation was observed. The electrolyte also shows a darkened color a few weeks or months after irradiation. The discovery of this latent effect may be significant because a battery may degrade significantly even showing no sign of degradation immediately after exposure. We investigated electrolyte composition by Fourier transform infrared spectroscopy, ultraviolet-visible spectroscopy, and nuclear magnetic resonance spectroscopy prior and post irradiation. Polymerization reactions and HF formation are considered as the cause of the discoloration. (C) 2016 Elsevier B.V. All rights reserved.
机译:当锂离子电池在辐射条件下运行时(例如在深空探测,高辐射场中或在核事故后的情况下营救或取样设备),其性能下降和耐用性是一个主要问题。本文分别研究了辐射对电极和电解质材料的影响,以及它们对电池容量损失和电阻增加的影响。使用A(60)Co辐照器(34.3 krad / h)为1:1 wt%EC:DMC电解质中的LiFePO4电极提供0.8、4.1和9.8 Mrad的剂量,向1 M LiPF6提供0.8、1.6和5.7 Mrad的剂量。这项研究表明,用辐照组件组装的纽扣电池的故障率(约70%)高于对照组(约14%)。观察到辐照后电池容量明显下降。辐照后数周或数月,电解质也会显示出深色。这种潜在效应的发现可能很重要,因为即使暴露后立即显示出没有退化迹象,电池也可能会显着退化。我们通过傅立叶变换红外光谱法,紫外可见光谱法和核磁共振光谱法研究了辐照前后的电解质成分。聚合反应和HF的形成被认为是变色的原因。 (C)2016 Elsevier B.V.保留所有权利。

著录项

  • 来源
    《Journal of power sources》 |2016年第30期|242-250|共9页
  • 作者单位

    Ohio State Univ, Dept Mech & Aerosp Engn, Nucl Engn Program, Columbus, OH 43210 USA;

    Ohio State Univ, Dept Chem & Biochem, Columbus, OH 43210 USA;

    Ohio State Univ, Dept Mech & Aerosp Engn, Ctr Automot Res, Columbus, OH 43210 USA;

    Ohio State Univ, Dept Chem & Biochem, Columbus, OH 43210 USA;

    Ohio State Univ, Dept Mech & Aerosp Engn, Nucl Engn Program, Columbus, OH 43210 USA;

    Ohio State Univ, Dept Mech & Aerosp Engn, Ctr Automot Res, Columbus, OH 43210 USA;

    Ohio State Univ, Dept Chem & Biochem, Columbus, OH 43210 USA;

    Ohio State Univ, Dept Mech & Aerosp Engn, Nucl Engn Program, Columbus, OH 43210 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Radiation effects; Lithium ion batteries; LiFePO4; LiPF6; Electrolyte; Capacity fade;

    机译:辐射效应锂离子电池LiFePO4 LiPF6电解质容量衰减;
  • 入库时间 2022-08-18 00:22:19

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