文献类型：期刊文献

英文题名：Optimized synthesis of novel LiPOF4 electrolyte additives and their application in lithium-sulfur batteries

作者：Liu, Tao Tang, Shiyun Tang, Anjiang Guo, Junjiang Wei, Deju Hu, Chuanhang

第一作者：Liu, Tao

通信作者：Tang, AJ[1]

机构：[1]Guizhou Univ, Coll Chem & Chem Engn, Guiyang 550025, Guizhou, Peoples R China;[2]Guizhou Inst Technol, Guiyang 550003, Guizhou, Peoples R China

第一机构：Guizhou Univ, Coll Chem & Chem Engn, Guiyang 550025, Guizhou, Peoples R China

通信机构：corresponding author), Guizhou Inst Technol, Guiyang 550003, Guizhou, Peoples R China.|贵州理工学院;

年份：2025

外文期刊名：JOURNAL OF SOLID STATE ELECTROCHEMISTRY

收录：;EI(收录号：20254919646570);Scopus(收录号：2-s2.0-105023654216);WOS:【SCI-EXPANDED(收录号:WOS:001628522600001)】；

基金：The research was supported by Science and Technology Planning Project of Guizhou Province (Qiankehezhicheng [2021] Yiban 493 and Qiankehejichu-ZK [2023] Yiban 129), National Natural Science Foundation of China (No. 21766005).

语种：英文

外文关键词：Electrolyte additives; Lithium tetrafluorophosphate (LiPOF4); Phosphorus trifluoride (POF3); Lithium-sulfur battery; Charge-discharge plateau

摘要：To meet the development demands of high-energy-density, long-cycle-life lithium-ion batteries, this study focuses on the development of high-performance electrolyte additives, and has successfully synthesized and systematically characterized a novel lithium salt additive lithium tetrafluorophosphate (LiPOF4). By optimizing the reaction process between silicon tetrafluoride (SiF4) and phosphorus pentoxide (P2O5), the critical intermediate phosphorus trifluoride (POF3) was successfully prepared using the gas-phase contact method, which was then reacted with lithium fluoride (LiF) to synthesize LiPOF4. SEM and TEM results showed that the obtained LiPOF4 was predominantly amorphous in nature. Thermogravimetric analysis confirmed that the material exhibits excellent thermal stability, with a significant decomposition temperature of 310 degrees C. Electrochemical testing revealed that adding 10 wt% LiPOF4 to the electrolyte significantly enhances the performance of lithium-sulfur batteries: after 100 cycles at a 0.5 C rate, the coulombic efficiency was 83.7% (compared to 77.1% for the control group), the charge specific capacity was 594.7 mAh/g (control group: 534.7 mAh/g), and the discharge specific capacity was 755.1 mAh/g (control group: 697.4 mAh/g). Additionally, the addition of LiPOF4 effectively extended the charge-discharge plateau of the lithium-sulfur battery. This work provides new materials and new ideas for improving electrolyte performance.