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/ange.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

DOI:https://doi.org/10.1002/ange.202102403· OSTI ID:1781708

Jia, Hao ^[1]; Xu, Yaobin ^[2]; Zhang, Xianhui ^[1]; Burton, Sarah D. ^[2]; Gao, Peiyuan ^[3]; Matthews, Bethany E. ^[1]; Engelhard, Mark H. ^[2]; Han, Kee Sung ^[3]; Zhong, Lirong ^[1]; Wang, Chongmin ^[2]; ^[1]

Energy and Environment Directorate Pacific Northwest National Laboratory 902 Battelle Boulevard Richland WA 99354 USA
Environmental and Molecular Sciences Laboratory Pacific Northwest National Laboratory 902 Battelle Boulevard Richland WA 99354 USA
Physical and Computational Sciences Directorate Pacific Northwest National Laboratory 902 Battelle Boulevard Richland WA 99354 USA

Abstract

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 sheaths via electrolyte additives, excellent electrochemical performance can be achieved with TMP _a ‐based electrolytes in Gr∥LiNi _0.8 Mn _0.1 Co _0.1 O ₂ cells. After 500 charge/discharge cycles within the voltage range of 2.5–4.4 V, the batteries containing the TMP _a ‐based LHCE with a proper additive can achieve a capacity retention of 85.4 %, being significantly higher than cells using a LiPF ₆ ‐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 LiPF ₆ ‐organocarbonates electrolyte.

View Accepted Manuscript (Publisher)

Sponsoring Organization:: USDOE

Grant/Contract Number:: NONE; EE0008444; AC05-76RL01830

OSTI ID:: 1781708

Journal Information:: Angewandte Chemie, Journal Name: Angewandte Chemie Journal Issue: 23 Vol. 133; ISSN 0044-8249

Publisher:: Wiley Blackwell (John Wiley & Sons)Copyright Statement

Country of Publication:: Germany

Language:: English

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