Journal Article

IMPULSE-2024-00127

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Ether‐Based Electrolyte for High‐Temperature and High‐Voltage Lithium Metal Batteries

Xu, T. ; Zheng, T. ; Ru, Z. ; Song, J. ; Gu, M. ; Yue, Y. ; Xiao, Y. ; Amzil, S. ; Gao, J. ; Müller-Buschbaum, P.MLZ* ; Wang, K. (Corresponding author) ; Zhao, H. (Corresponding author) ; Cheng, Y.-J. (Corresponding author) ; Xia, Y.

2024
Wiley-VCH Weinheim

Please use a persistent id in citations: doi:10.1002/adfm.202313319

Abstract: The compatibility of lithium metal with organic solvents is the most crucial for lithium metal batteries (LMBs). Even though ether solvents show excellent compatibility toward lithium metal, the reactivity of the ether solvents at elevated temperatures and high voltages hinders their utilization in lithium metal battery systems. In this study, a high-temperature ether electrolyte is designed comprising lithium oxalyldifluoroborate (LiODFB), diethylene glycol dibutyl ether (DGDE), 3-methoxypropionitrile (MPN), and fluorinated ethylene carbonate (FEC), which is abbreviated as MDF electrolyte. The presence of MPN in the electrolyte changes the solvation structure, thereby facilitating increased redox reactions of ODFB− and synergizing with FEC to build a robust solid electrolyte interface (SEI), effectively inhibiting lithium dendrites growth and solvent decomposition. Consequently, the MDF electrolyte exhibits not only long cyclic stability and high coulombic efficiency in Li||Cu and Li||Li cells but also excellent cyclic characteristics in both Li||LiFePO4 (LFP) and Li||LiNi0.8Co0.1Mn0.1O2 (NCM811) cells. Remarkably, these cells demonstrate stable operation even when exposed to higher temperatures of up to 80 °C, while the Li||NCM811 cell maintains consistent cyclic stability at an elevated voltage level of 4.5 V.

Keyword(s): Energy (1st) ; Chemistry (2nd) ; Materials Science (2nd) ; Industrial Application (2nd)

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Contributing Institute(s):

1. E13 (E13)
2. Heinz Maier-Leibnitz Zentrum (MLZ)

Experiment(s):

1. No specific instrument

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Database coverage:
; Clarivate Analytics Master Journal List ; Current Contents - Electronics and Telecommunications Collection ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; DEAL Wiley ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 15 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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