In order to address the trade-off between the safety lithium ion battery (LIB) electrolytes and their electrochemical performance, synergetic effects of flame retardant additives (FRs) in combination with film forming additives (FFAs) are investigated. Triphenyl phosphate (TPP) and a silicon-containing additive (WA) are applied as FRs to improve the onset temperature of the thermal runaway of a LIB standard electrolyte (LP57: 1 M LiPF₆ in EC:EMC 3:7) about 15 K and 28 K, respectively. The application of the FRs in MCMB graphite/lithium metal and NMC111/lithium metal three-electrode cells induces insufficiencies in terms of charge/discharge cycling stability and rate capability.

It is investigated if the addition of FFAs can degrade the insufficiencies that are induced by the FRs. Vinylene carbonate, vinyl ethylene carbonate and fluoroethylene carbonate are added to a mixture of LP57 with 10% FR to enhance the cycling performance via improved interphase formation. Results reveal, that the rate capability of cells containing TPP or WA is especially improved by addition of 2% or 5% FEC, respectively.

Postmortem analyses of the electrodes by SEM and of the electrolyte by GC-MS are performed. Direct correlations between the cycling behavior during the C-rate study and the electrolyte decomposition products are drawn.

为了解决安全锂离子电池（LIB）电解质与其电化学性能之间的折衷问题，研究了阻燃添加剂（FRs）与成膜添加剂（FFA）结合的协同效应。磷酸三苯酯（TPP）和含硅添加剂（WA）被用作阻燃剂，以提高LIB标准电解质（EC：EMC 3：7中的LP57：1 M LiPF _6）的热失控的起始温度约15 K和28K。在MCMB石墨/锂金属和NMC111 /锂金属三电极电池中应用FR会引起充放电循环稳定性和速率能力方面的不足。

研究了添加FFA是否可以降低由FR引起的功能不足。将碳酸亚乙烯酯，碳酸乙烯基亚乙酯和碳酸氟亚乙酯加入到具有10％FR的LP57混合物中，以改善相间形成，从而提高循环性能。结果表明，分别添加2％或5％FEC可以特别提高含有TPP或WA的细胞的速率能力。

通过SEM对电极进行事后分析，通过GC-MS对电解质进行事后分析。得出了在C速率研究期间的循环行为与电解质分解产物之间的直接相关性。