Lithium Bis(trimethylsilyl) Phosphate as an Electrolyte Additive to Improve the Low-Temperature Performance for LiNi0.8Co0.1Mn0.1O2/Graphite Cells. Issue 8 (30th August 2021)

• Record Type: Journal Article
• Authors: Kim, Jongjung; Adiraju, Venkata A. K.; Chae, Oh B.; Lucht, Brett L.
• Is Part Of: Journal of the Electrochemical Society. Volume 168:Issue 8(2021)
• Publication Date: 2021-08-30
• Subjects: Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/1945-7111/ac1b00
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : Lithium Bis(trimethylsilyl) Phosphate (LiTMSP) was incorporated as an electrolyte additive in LiNi0.8 Co0.1 Mn0.1 O2 (NCM811)/graphite cells for improving the low-temperature performance. Previously, we reported the bi-functional roles of LiTMSP for LiNi0.5 Mn1.5 O4 /graphite cells, which are hydrogen fluoride (HF) scavenger and film-forming agent. In this work, NCM811/graphite cells with LiTMSP (1 wt%) have better rate performance at −10 °C than cells without LiTMSP. This is due to the reduced resistance of NCM811/graphite cells with the addition of LiTMSP, resulting from LiTMSP induced-surface film generated on graphite electrodes which has improved lithium-ion conduction.