2021/08/17 by Wentao Song, Jessie Harlow, E. R. Logan +6 · 1 citation
Engineering · Chemistry · #Advancements in Battery Materials #Advanced Battery Materials and Technologies #Advanced Battery Technologies Research #Electrolyte #Graphite #Materials science #Battery (electricity) #Analytical Chemistry (journal) #Chemical engineering #Electrode #Chemistry #Composite material #Chromatography #Physical chemistry #Physics
paper · doi:10.1149/1945-7111/ac1e55
openalex publication_date 2021/08/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/06/26
A few weight percent of electrolyte additives can dramatically improve Li-ion battery performance and lifetime. A systematic investigation of a series of electrolyte additive formulations was performed on bimodal (BM) and single crystal (SC) LiNi 0.8 Mn 0.1 Co 0.1 O 2 (NMC811)/artificial graphite (AG) pouch cells. Long-term cycling tests at different temperatures (20 °C, 40 °C, and 55 °C) and different upper cutoff voltages (4.06 V and 4.20 V) were performed. These tests results were combined with advanced characterization techniques like ultra-high precision charging (UHPC), ex-situ gas measurement, and automatic cell storage tests to rank the additives based on their effectiveness. Radar plots and a figure-of-merit (FOM) approach were further utilized to summarize results for the BM and SC NMC811/AG cells. This work provides a useful benchmark for those developing NMC811/graphite cells and gives important insights for future electrolyte additive studies.