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首页> 外文期刊>Advanced energy materials >Prescribing Functional Additives for Treating the Poor Performances of High-Voltage (5 V-class) LiNi_(0.5)Mn_(1.5)O_4/MCMB Li-Ion Batteries
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Prescribing Functional Additives for Treating the Poor Performances of High-Voltage (5 V-class) LiNi_(0.5)Mn_(1.5)O_4/MCMB Li-Ion Batteries

机译：规定用于处理高压（5 V级）LiNi_（0.5）Mn_（1.5）O_4 / MCMB锂离子电池性能不佳的功能添加剂

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摘要

In this paper, tris(trimethylsilyl) phosphite (TMSP) and 1,3-propanediolcyclic sulfate (PCS) are unprecedentedly prescribed as binary functional additives for treating the poor performances of high-voltage (5 V-class) LiNi0.5Mn1.5O4/MCMB (graphitic mesocarbon microbeads) Li-ion batteries at both room temperature and 50 degrees C. The high-voltage LiNi0.5Mn1.5O4/MCMB cell with binary functional additives shows a preponderant discharge capacity retention of 79.5% after 500 cycles at 0.5 C rate at room temperature. By increasing the current intensity from 0.2 to 5 C rate, the discharge capacity retention of the high-voltage cell with binary functional additives is approximate to 90%, while the counterpart is only approximate to 55%. By characterizations, it is rationally demonstrated that the binary functional additives decompose and participate in the modification of solid-electrolyte interface layers (both electrodes), which are more conductive, protective, and resistant to electrolyte oxidative/reductive decompositions (accompanying active-Li+ consuming parasitic reactions) due to synergistic effects. Specifically, the TMSP additive can stabilize LiPF6 salt and scavenge erosive hydrofluoric acid. More encouragingly, at 50 degrees C, the high-voltage cell with binary functional additives holds an ultrahigh discharge capacity retention of 79.5% after 200 cycles at 1 C rate. Moreover, a third designed self-extinguishing flame-retardant additive of (ethoxy)-pentafluoro-cyclo-triphosphazene (PFPN) is introduced for reducing the flammability of the aforementioned binary functional additives containing electrolyte.
机译：在本文中，前所未有地规定了亚磷酸三（三甲基甲硅烷基）酯和1,3-丙二醇环硫酸盐（PCS）作为二元功能添加剂，用于处理高压（5 V级）LiNi0.5Mn1.5O4 /在室温和50摄氏度下均使用MCMB（石墨中碳微珠）锂离子电池。带有二元功能添加剂的高压LiNi0.5Mn1.5O4 / MCMB电池在0.5 C下经过500次循环后，其放电容量保持率高达79.5％。室温下的速率。通过将电流强度从0.2 C增加到5 C，具有二元功能添加剂的高压电池的放电容量保持率大约为90％，而对应的仅大约为55％。通过表征，合理地证明了二元功能添加剂分解并参与了固体-电解质界面层（两个电极）的改性，这些界面层更具导电性，保护性，并能抵抗电解质的氧化/还原分解（伴随活性锂+的消耗）寄生反应）。具体而言，TMSP添加剂可以稳定LiPF6盐并清除腐蚀性氢氟酸。更令人鼓舞的是，在50摄氏度下，具有二元功能添加剂的高压电池在以1摄氏度的速率运行200次后，保持了79.5％的超高放电容量。此外，为了降低上述含电解质的二元功能添加剂的可燃性，引入了第三种设计的（乙氧基）-五氟环-三磷腈（PFPN）的自熄阻燃添加剂。

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  • 来源
    《Advanced energy materials》 |2018年第9期|1701398.1-1701398.14|共14页
  • 作者

    Xu Gaojie; Pang Chunguang; Chen Bingbing; Ma Jun; Wang Xiao; Chai Jingchao; Wang Qingfu; An Weizhong; Zhou Xinhong; Cui Guanglei; Chen Liquan;

  • 作者单位

    Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Qingdao Ind Energy Storage Res Inst, 189 Songling Rd, Qingdao 266101, Peoples R China;

    Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Qingdao Ind Energy Storage Res Inst, 189 Songling Rd, Qingdao 266101, Peoples R China;

    Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Qingdao Ind Energy Storage Res Inst, 189 Songling Rd, Qingdao 266101, Peoples R China;

    Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Qingdao Ind Energy Storage Res Inst, 189 Songling Rd, Qingdao 266101, Peoples R China;

    Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Qingdao Ind Energy Storage Res Inst, 189 Songling Rd, Qingdao 266101, Peoples R China;

    Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Qingdao Ind Energy Storage Res Inst, 189 Songling Rd, Qingdao 266101, Peoples R China;

    Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Qingdao Ind Energy Storage Res Inst, 189 Songling Rd, Qingdao 266101, Peoples R China;

    Ocean Univ China, Coll Chem & Chem Engn, 238 Songling Rd, Qingdao 266100, Peoples R China;

    Qingdao Univ Sci & Technol, Coll Chem & Mol Engn, 53 Zhengzhou Rd, Qingdao 266042, Peoples R China;

    Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Qingdao Ind Energy Storage Res Inst, 189 Songling Rd, Qingdao 266101, Peoples R China;

    Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Qingdao Ind Energy Storage Res Inst, 189 Songling Rd, Qingdao 266101, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    functional additives combination; high-voltage Li-ion batteries; solid-electrolyte interface analysis; synergistic effect; well-treated performances;

    机译：功能性添加剂组合;高压锂离子电池;固体电解质界面分析;协同效应;性能良好;

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