摘要
六氟磷酸锂溶解在有机碳酸酯溶剂中形成的溶液是在锂离子电池中应用最广的电解液。然而,含有六氟磷酸锂电解质的锂离子电池在温度升高至60℃以上时具有较差的稳定性。本文利用核磁共振波谱1H、13C、19F谱及1H、13C、19F的偶合裂分,对六氟磷酸锂的分解进行分析和研究。研究表明六氟磷酸锂的分解产物主要是HF、PF5、O=PF3、O=PF2(OH)和O=PF(OH)2。
The most widely used electrolyte for lithium -ion batteries was lithium hexafluorophosphate in a mixture of organic carbonate solvents.However, lithium -ion batteries containing lithium hexafluorophosphate -based electrolytes had poor stability at elevated temperatures (〉60 ℃).Using 1 H, 13 C, 19 F NMR spectroscopy and 1 H, 13 C, 19 F coupling splitting were used to study the decomposition of the lithium hexafluorophosphate.It was found that the main products of decomposition were HF , PF5 , O=PF3 , O=PF2 ( OH) and O=PF( OH) 2.
出处
《广州化工》
CAS
2014年第14期106-108,119,共4页
GuangZhou Chemical Industry
关键词
核磁共振(NMR)
六氟磷酸锂
分解
nuclear magnetic resonance ( NMR)
lithium hexafluorophosphate
decomposition