Lithium difluorophosphate is an inorganic compound with the chemical formula LiPO₂F₂. This substance mainly appears as a white powdery solid, with a melting point higher than 300°C, a density of 1.979g/cm³, and a solubility of 40324mg/L at 20°C. Its vapour pressure is 0.000000145Pa at 25°C and 298K.
Lithium difluorophosphate has a wide range of applications in the battery field, especially in the electrolyte of lithium-ion secondary batteries. It can form a film at the electrode interface, thereby improving the high and low temperature cycling performance of the battery, reducing the self-discharge of the battery, and effectively reducing the use of lithium hexafluorophosphate. In addition, lithium difluorophosphate can improve the low-temperature output characteristics of the battery, inhibit the decomposition of the cathode surface during high-temperature cycling, and prevent the oxidation reaction of the electrolyte solution, thus improving the output characteristics and dissolution characteristics of the battery after high-temperature storage.
Inspection Report
|
产品名称 Product Name |
二氟磷酸锂 |
生产批号 Lot Number |
23111501 |
|
分子式 Chemical Molecular |
LiPO2F2 |
检测日期 Test Date |
2023.11.16 |
|
CAS 号 CAS Number |
24389-25-1 |
重量 Weight |
25g |
|
项目 Items |
标准 Specification |
检测结果 Analysis Results |
检测方法 Analysis Method |
|
外观 Appearance |
白色粉末 white powder |
白色粉末 white powder |
目测 visual inspection |
|
纯度（%） purity（%） |
≥99.5 |
99.90 |
差减法 minusing |
|
酸度（ppm） acidity（ppm） |
≤150 |
26.59 |
酸碱滴定法 acid-base titration |
|
不溶物(ppm) undissolved substance(ppm) |
≤500 |
189 |
溶解过滤 Solution filtration |
|
水分（ppm） moisture（ppm） |
≤150 |
56.0 |
卡尔费休滴定 Karl Fischer titration |
|
Na (ppm) 钠 (ppm) |
≤5 |
0.68 |
ICP |
|
Mg (ppm) 镁 (ppm) |
≤5 |
0.12 |
ICP |
|
Al (ppm) 铝 (ppm) |
≤5 |
ND |
ICP |
|
钾(ppm) K (ppm) |
≤5 |
0.58 |
ICP |
|
Ca (ppm) 钙 (ppm) |
≤5 |
0.68 |
ICP |
|
Cr (ppm) 铬 (ppm) |
≤15 |
ND |
ICP |
|
Fe (ppm) 铁 (ppm) |
≤10 |
0.17 |
ICP |
|
镍 (ppm) Ni (ppm) |
≤5 |
ND |
ICP |
|
铜 (ppm) |
≤5 |
ND |
ICP |
|
Zn (ppm) 锌 (ppm) |
≤5 |
ND |
ICP |
|
As (ppm) 砷 (ppm) |
≤2 |
0.26 |
ICP |
|
Cd (ppm) 镉 (ppm) |
≤2 |
0.01 |
ICP |
|
Hg (ppm) 汞 (ppm) |
≤2 |
ND |
ICP |
|
Pb(ppm) 铅 (ppm) |
≤2 |
0.03 |
ICP |
![Mg[B(HFIP)4]2](/uploadfile/202401/09/15f1a3930e925703c1b1aaa1833dc2cb_medium.jpg)
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