A Systematic Study of Electrolyte Additives in Single Crystal and Bimodal LiNi 0.8 Mn 0.1 Co 0.1 O 2 /Graphite Pouch Cells

A Systematic Study of Electrolyte Additives in Single Crystal and Bimodal LiNi 0.8 Mn 0.1 Co 0.1 O 2 /Graphite Pouch Cells

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 (A...

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Veröffentlicht in:Journal of the Electrochemical Society 2021-09, Vol.168 (9), p.90503
Hauptverfasser: Song, Wentao, Harlow, Jessie, Logan, Eric, Hebecker, Helena, Coon, Matthew, Molino, Laurent, Johnson, Michel, Dahn, Jeff, Metzger, Michael
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container_end_page
container_issue 9
container_start_page 90503
container_title Journal of the Electrochemical Society
container_volume 168
creator Song, Wentao
Harlow, Jessie
Logan, Eric
Hebecker, Helena
Coon, Matthew
Molino, Laurent
Johnson, Michel
Dahn, Jeff
Metzger, Michael
description 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.
doi_str_mv 10.1149/1945-7111/ac1e55
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title A Systematic Study of Electrolyte Additives in Single Crystal and Bimodal LiNi 0.8 Mn 0.1 Co 0.1 O 2 /Graphite Pouch Cells
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