Advanced Low-Flammable Electrolytes for Stable Operation of High-Voltage Lithium-Ion Batteries

Jia, Hao; Xu, Yaobin; Zhang, Xianhui; Burton, Sarah D.; Gao, Peiyuan; Matthews, Bethany E.; Engelhard, Mark H.; Han, Kee Sung; Zhong, Lirong; Wang, Chongmin; Xu, Wu

doi:10.1002/anie.202102403

Advanced Low-Flammable Electrolytes for Stable Operation of High-Voltage Lithium-Ion Batteries

Journal Article · Thu Apr 29 00:00:00 EDT 2021 · Angewandte Chemie (International Edition)

DOI:https://doi.org/10.1002/anie.202102403· OSTI ID:1784754

Jia, Hao ^[1]; Xu, Yaobin ^[1]; Zhang, Xianhui ^[1]; Burton, Sarah D. ^[1]; Gao, Peiyuan ^[1]; Matthews, Bethany E. ^[1]; Engelhard, Mark H. ^[1]; Han, Kee Sung ^[1]; Zhong, Lirong ^[1]; Wang, Chongmin ^[1]; ^[1]

Pacific Northwest National Lab. (PNNL), Richland, WA (United States)

Despite being an effective flame retardant, trimethyl phosphate (TMP_a) is generally considered as an unqualified solvent for fabricating electrolytes used in graphite (Gr) based lithium ion batteries as it readily leads to Gr exfoliation and cell failure. In this work, by adopting the unique solvation structure of localized high-concentration electrolyte (LHCE) to TMP_a and tuning the composition of the solvation sheath via electrolyte additive, excellent electrochemical performance can be achieved with TMPa based electrolytes in Gr||LiNi_0.8Mn_0.1Co_0.1O₂ cells. After 500 charge/discharge cycles within the voltage range of 2.5-4.4 V, the batteries containing TMPa based LHCEs with proper additive can achieve a capacity retention of 85.4%, being significantly higher than cells using a LiPF₆-organocarbonates baseline electrolyte (75.2%). Meanwhile, due to the flame retarding effect of TMP_a, TMP_a based LHCEs exhibit significantly reduced flammability compared with the conventional LiPF₆-organocarbonates electrolyte.

View Accepted Manuscript (DOE)

Research Organization:: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC05-76RL01830

OSTI ID:: 1784754

Alternate ID(s):: OSTI ID: 1780187
OSTI ID: 23027202

Report Number(s):: PNNL-SA--159888

Journal Information:: Angewandte Chemie (International Edition), Journal Name: Angewandte Chemie (International Edition) Journal Issue: 23 Vol. 60; ISSN 1433-7851

Publisher:: WileyCopyright Statement

Country of Publication:: United States

Language:: English

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