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首页> 外文期刊>Journal of power sources >Self-discharge suppression of 4.9 V LiNi_(0.5)Mn_(1.5)O_4 cathode by using tris(trimethylsilyl)borate as an electrolyte additive
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Self-discharge suppression of 4.9 V LiNi_(0.5)Mn_(1.5)O_4 cathode by using tris(trimethylsilyl)borate as an electrolyte additive

机译:通过使用三(三甲基甲硅烷基)硼酸酯作为电解质添加剂抑制4.9 V LiNi_(0.5)Mn_(1.5)O_4阴极的自放电

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摘要

In this paper, tris(trimethylsilyl)borate (TMSB) is evaluated as an electrolyte additive for the self-discharge suppression of 4.9 V LiNi_(0.5)Mn_(1.5)O_4 cathode for lithium ion battery. The effect of TMSB on the surface properties of LiNi_(0.5)Mn_(1.5)O_4 is investigated via linear sweep voltammetry (LSV), cyclic voltammetry (CV), chronoamperometry (CA), charge-discharge test, electrochemical impedance spectra (EIS), scanning electron microscopy (SEM), X-ray diffraction (XRD), inductively coupled plasma atomic emission spectrometer (ICP-AES) and Fourier transform infrared spectroscopy (FTIR). It is found that the LiNi_(0.5)Mn_(1.5)O_4 cathode charged to 4.9 V (vs. Li/Li~+) suffers a serious self-discharge in 1 mol L~(-1) LiPF_6-EC/DMC (1:2, in weight), which can be suppressed effectively by adding 1 wt.% TMSB into the electrolyte. After storage for 20 days, the voltage of the charged cathode decreases from 4.7 to 0.5 V (vs. Li/Li~+) in the additive-free electrolyte, while that remains almost unchanged in the TMSB-containing electrolyte. The self-discharge suppression of the charged LiNi_(0.5)Mn_(1.5)O_4 cathode results from the preferential oxidation of TMSB and the subsequent formation of a protective solid electrolyte interphase film, which prevents electrolyte decomposition and protects LiNi_(0.5)Mn_(1.5)O_4 from destruction.
机译:在本文中,三(三甲基甲硅烷基)硼酸酯(TMSB)被评估为用于4.9 V LiNi_(0.5)Mn_(1.5)O_4锂离子电池正极自放电抑制的电解质添加剂。通过线性扫描伏安法(LSV),循环伏安法(CV),计时电流法(CA),充放电测试,电化学阻抗谱(EIS)研究了TMSB对LiNi_(0.5)Mn_(1.5)O_4表面性能的影响,扫描电子显微镜(SEM),X射线衍射(XRD),电感耦合等离子体原子发射光谱仪(ICP-AES)和傅里叶变换红外光谱(FTIR)。发现充电至4.9 V(vs. Li / Li〜+)的LiNi_(0.5)Mn_(1.5)O_4阴极在1 mol L〜(-1)LiPF_6-EC / DMC中会发生严重的自放电(1 :重量的2:2),可以通过在电解质中添加1重量%的TMSB来有效地抑制。储存20天后,带电荷的阴极电压在不含添加剂的电解质中从4.7 V降低至0.5 V(vs。Li / Li〜+),而在含TMSB的电解质中几乎保持不变。带电的LiNi_(0.5)Mn_(1.5)O_4阴极的自放电抑制归因于TMSB的优先氧化和随后形成的保护性固体电解质中间膜,该电解质膜防止电解质分解并保护LiNi_(0.5)Mn_(1.5) )O_4来自破坏。

著录项

  • 来源
    《Journal of power sources》 |2014年第25期|501-507|共7页
  • 作者单位

    School of Chemistry and Environment, South China Normal University, Guangzhou 510006, China, Key Laboratory of Electrochemical Technology on Energy Storage and Power Generation of Guangdong Higher Education Institutes, South China Normal University, Guangzhou 510006, China, Engineering Research Center of Materials and Technology for Electrochemical Energy Storage (Ministry of Education), South China Normal University, Guangzhou 510006, China;

    School of Chemistry and Environment, South China Normal University, Guangzhou 510006, China, Key Laboratory of Electrochemical Technology on Energy Storage and Power Generation of Guangdong Higher Education Institutes, South China Normal University, Guangzhou 510006, China, Engineering Research Center of Materials and Technology for Electrochemical Energy Storage (Ministry of Education), South China Normal University, Guangzhou 510006, China;

    School of Chemistry and Environment, South China Normal University, Guangzhou 510006, China, Key Laboratory of Electrochemical Technology on Energy Storage and Power Generation of Guangdong Higher Education Institutes, South China Normal University, Guangzhou 510006, China, Engineering Research Center of Materials and Technology for Electrochemical Energy Storage (Ministry of Education), South China Normal University, Guangzhou 510006, China;

    School of Chemistry and Environment, South China Normal University, Guangzhou 510006, China, Key Laboratory of Electrochemical Technology on Energy Storage and Power Generation of Guangdong Higher Education Institutes, South China Normal University, Guangzhou 510006, China, Engineering Research Center of Materials and Technology for Electrochemical Energy Storage (Ministry of Education), South China Normal University, Guangzhou 510006, China;

    School of Chemistry and Environment, South China Normal University, Guangzhou 510006, China, Key Laboratory of Electrochemical Technology on Energy Storage and Power Generation of Guangdong Higher Education Institutes, South China Normal University, Guangzhou 510006, China, Engineering Research Center of Materials and Technology for Electrochemical Energy Storage (Ministry of Education), South China Normal University, Guangzhou 510006, China;

    School of Chemistry and Environment, South China Normal University, Guangzhou 510006, China, Key Laboratory of Electrochemical Technology on Energy Storage and Power Generation of Guangdong Higher Education Institutes, South China Normal University, Guangzhou 510006, China, Engineering Research Center of Materials and Technology for Electrochemical Energy Storage (Ministry of Education), South China Normal University, Guangzhou 510006, China;

    School of Chemistry and Environment, South China Normal University, Guangzhou 510006, China, Key Laboratory of Electrochemical Technology on Energy Storage and Power Generation of Guangdong Higher Education Institutes, South China Normal University, Guangzhou 510006, China, Engineering Research Center of Materials and Technology for Electrochemical Energy Storage (Ministry of Education), South China Normal University, Guangzhou 510006, China;

    School of Chemistry and Environment, South China Normal University, Guangzhou 510006, China, Key Laboratory of Electrochemical Technology on Energy Storage and Power Generation of Guangdong Higher Education Institutes, South China Normal University, Guangzhou 510006, China, Engineering Research Center of Materials and Technology for Electrochemical Energy Storage (Ministry of Education), South China Normal University, Guangzhou 510006, China;

  • 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

    Lithium ion battery; Lithium nickel manganese oxide; Self-discharge; Suppression; Tris(trimethylsilyl)borate; Solid electrolyte interphase;

    机译:锂离子电池;锂镍锰氧化物;自放电;抑制;三(三甲基甲硅烷基)硼酸酯;固体电解质相间;

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