Novel silane compounds such as {2-[2-(2-methoxyethoxy)ethoxy]ethoxy} trimethylsilane (1), bis{2-[2-(2-methoxyethoxy)ethoxy]ethoxy}dimethylsilane (2), {3-[2-(2-(2-methoxyethoxy)ethoxy)ethoxy]-propyl}trimethylsilane (3) and {[2-(2-(2-methoxyethoxy)ethoxy)ethoxy]-methyl} trimethylsilane (4) have been synthesized and used as non-aqueous electrolyte solvents in lithium-ion batteries. These silane molecules can easily dissolve most lithium salts including lithium bis(oxalato)borate (LiBOB), LiPF₆, LiBF₄, and lithium trifluoromethylsulfonimide. The LiBOB salt was found to be very appropriate for these silane molecules because, unlike LiPF₆, LiBOB can provide a good passivation film on a graphite anode. Cyclic voltammetry analyses show that silane-based electrolytes with a 0.8 M LiBOB salt concentration are stable to 4.4 V; they also exhibit very high lithium-ion conductivities up to 1.29 × 10⁻³ S/cm at room temperature. Full cell performance tests with LiNi_0.08Co_0.15Al_0.05O₂ as the positive electrode and MCMB graphite as the negative electrode have shown excellent cyclability both at room temperature and at 40 °C. Cells with these new silane electrolytes exhibit long calendar life; they show no impedance rise after aging at 80% state of charge and 55 °C for one year. The results suggest that silane-based electrolytes have great potential for use in lithium-ion batteries.

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新型硅烷化合物作为锂离子电池的电解质溶剂

新型硅烷化合物，例如{2- [2-（2-甲氧基乙氧基）乙氧基]乙氧基}三甲基硅烷（1），双{2- [2-（2-甲氧基乙氧基）乙氧基]乙氧基}二甲基硅烷（2），{3- [合成并使用了2-（2-（2-（2-甲氧基乙氧基）乙氧基）乙氧基]-丙基}三甲基硅烷（3）和{[2-（2-（2-（2-甲氧基乙氧基）乙氧基）乙氧基]-甲基}三甲基硅烷（4）。作为锂离子电池中的非水电解质溶剂。这些硅烷分子可以轻松溶解大多数锂盐，包括双（草酸硼酸）硼酸锂（LiBOB），LiPF ₆，LiBF ₄和三氟甲基磺酰亚胺锂。发现LiBOB盐非常适合这些硅烷分子，因为与LiPF ₆不同LiBOB可以在石墨阳极上提供良好的钝化膜。循环伏安法分析表明，LiBOB盐浓度为0.8 M的基于硅烷的电解质可稳定至4.4V。它们 在室温下还具有高达1.29×10 ^-3 S / cm的非常高的锂离子电导率。使用LiNi _0.08 Co _0.15 Al _0.05 O _2进行全电池性能测试作为正极，MCMB石墨作为负极在室温和40°C下均显示出优异的循环性。装有这些新型硅烷电解质的电池具有较长的日历寿命。在80％的充电状态和55°C的条件下老化一年后，它们没有显示出阻抗增加。结果表明，基于硅烷的电解质具有用于锂离子电池的巨大潜力。