电源技术2025，Vol.49Issue(4)：720-726,7.DOI:10.3969/j.issn.1002-087X.2025.04.006
快离子导体助剂对石墨低温性能的影响
Influence of fast ionic conductor additives on low temperature properties of graphite
李纾黎 1陈士朋 1张伶俐1
作者信息
- 1. 广州鹏辉能源科技股份有限公司,广东 广州 511483
- 折叠
摘要
Abstract
Li+de-solvation at the solid electrolyte interphase(SEI)is a critical step governing the fast charging and low-temperature performance of lithium-ion batteries.The Li3P,LiF,and Li3PO4 interfa-cial phases were designed on graphite anode by liquid-phase coating,respectively,which promoted the de-solvation of Li+and constructed an inorganic-rich SEI membrane,thus accelerating the Li+trans-port at the electrode interfaces and between the interfaces.From the EIS impedance,it can be clearly found that the low-temperature internal resistance is significantly reduced with the addition of the ad-ditive LiF compared with conventional graphite.The battery using PHG-Q anode can guarantee 49.57%charging capacity share at-20℃@0.2 C.At-40℃@0.2 C,the charging capacity share is im-proved by 7.29%with conventional graphite.Cycling LiF additives at low temperature-40℃@0.05 C facilitates Li+de-solvation effect,and the capacity retention rate can be maintained at 93.95%for 800 cycles.关键词
锂离子电池/快离子导体助剂/低温性能/负极材料Key words
lithium-ion batteries/fast ionic conductor additives/low-temperature performance/anode materials分类
动力与电气工程引用本文复制引用
李纾黎,陈士朋,张伶俐..快离子导体助剂对石墨低温性能的影响[J].电源技术,2025,49(4):720-726,7.
