An electrolyte using 2,3,4,5,6-pentafluorophenyl methanesulfonate (PFPMS) as a versatile additive is investigated through calculating the molecular orbital energies of additives and solvents and designing the electrolyte composition, and the comparative performances of LiNi_0.5Co_0.2Mn_0.3O₂/graphite cells operating in a wide-temperature range are improved. It is revealed that PFPMS can form interfacial films on both the cathode and anode surfaces, resulting in a decrease of the cell impedance and the side reactions between the active materials and electrolyte. Compared to the cells without additive of 74.9% and those with vinylene carbonate (VC) of 76.7%, the cycling retention of the cell with 1.0 wt % PFPMS reaches 91.7% after 400 cycles at room temperature. In particular, for the high-temperature storage at 60 °C for 7 d, the cell containing 1.0 wt % PFPMS exhibits optimal capacity retention of 86.3% and capacity recovery of 90.6%; for the low-temperature discharge capacity retention at −20 °C, the cell with 1.0 wt % PFPMS maintains at 66.3% at 0.5 C, while for the cells without additive and containing 1.0 wt % VC, their retention values are 55.0 and 62.1%, respectively. The excellent cycling, wide-temperature practicability, and rate capability of the cells with PFPMS demonstrate that the electrolyte with PFPMS additive is promising for applications in LiNi_0.5Co_0.2Mn_0.3O₂/graphite batteries.

中文翻译：

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2,3,4,5,6-五氟苯基甲磺酸盐作为多功能电解质与LiNi _0.5 Co _0.2 Mn _0.3 O ₂ /石墨电池可在较宽的温度范围内工作

通过计算添加剂和溶剂的分子轨道能并设计电解质组成，以及LiNi _0.5 Co _0.2 Mn的比较性能，研究了使用2,3,4,5,6-五氟苯基甲磺酸酯（PFPMS）作为通用添加剂的电解质。_0.3 O ₂在宽温度范围内工作的/石墨电池得到改善。揭示了PFPMS可在阴极和阳极表面上均形成界面膜，从而导致电池阻抗的降低以及活性材料与电解质之间的副反应。与不含添加剂的74.9％的电池和具有碳酸亚乙烯酯（VC）的电池的76.7％相比，具有1.0 wt％PFPMS的电池在室温下经过400次循环后的循环保持力达到91.7％。特别地，对于在60℃下高温储存7天，含有1.0wt％PFPMS的电池表现出86.3％的最佳容量保持率和90.6％的容量恢复率。对于在−20°C下的低温放电容量保持，具有1.0 wt％PFPMS的电池在0.5 C时保持在66.3％，而对于没有添加添加剂且含有1.0 wt％VC的电池，它们的保留值分别为55.0％和62.1％。带有PFPMS的电池具有出色的循环性能，宽温度实用性和倍率性能，这表明带有PFPMS添加剂的电解质有望用于LiNi中_0.5 Co _0.2 Mn _0.3 O ₂ /石墨电池。