Cited by 220Advanced Battery Materials and TechnologiesAdvancements in Battery MaterialsAdvanced Battery Technologies Research

A Multifunctional Dual‐Salt Localized High‐Concentration Electrolyte for Fast Dynamic High‐Voltage Lithium Battery in Wide Temperature Range

Lin, Shuangshuang, Hua, Haiming, Lai, Pengbin, Zhao, Jinbao·2021·Advanced Energy Materials

Abstract

In this work, a multifunctional 2m dual‐salt sulfolane (TMS)/ethyl acetate (EA)‐based localized high‐concentration electrolyte (LHCE) with 10 wt% fluorocarbonate (FEC) is reported. Its incorporation into a Li||Ni 0.5 Co 0.2 Mn 0.3 O 2 battery enables it to maintain nearly 89% capacity retention after 200 cycles with 1 C (200 mA g −1 ) charge/discharge current density charged to 4.6 V at 25 °C, showing good high‐voltage cyclic stability. A superior 10 C high‐rate performance with 65% (≈130 mAh g −1 ) specific capacity is also achieved. Furthermore, it still remains a liquid and exhibits good ionic conductivity even at −80 °C, and enables Li||Ni 0.5 Co 0.2 Mn 0.3 O 2 batteries to deliver more than 50% of their room‐temperature capacity at −40 °C and remains stable for over 200 cycles under the same condition as before, realizing outstanding low‐temperature fast‐charging/discharging performance. It also demonstrates compatibility with both lithium metal and graphite anode. All in all, this work provides a new idea for the design of a fast‐dynamic, high‐voltage, and low‐temperature lithium battery electrolyte. The findings of this work indicate that LHCEs made directly from the optimal high‐concentration electrolyte are not the most suitable approach, combining the diluent with an additive is necessary and effective.

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Crossref · 10.1002/aenm.202101775

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  • A novel LHCE system using LiTFSI and LiDFOB as dual-salt, TMS and EA as solvents, and HFE as diluent prevents freezing of the electrolyte even at -80 °C, enabling an NMC532-Li cell to have 75% room-temperature capacity at -40 °C and fast-charge/discharge cyclic stability at 1 C.

    “A novel LHCE system has been designed by using LiTFSI and LiDFOB as dual-salt, inexpensive and commonly used TMS (sulfolane) and EA as solvents and HFE (hydrofluoroether) as diluent.The synergistic effect of multiple components prevents the freezing of the electrolyte even at -80 °C, thus enabling an NMC532-Li cell having 75% RT capacity at -40 °C, and fast-charge/discharge cyclic stability at a 1”

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Authors
Lin, S., Hua, H., Lai, P., & Zhao, J.
Affiliations
Xiamen University (CN)
Corresponding author
Zhao, Jinbao
Venue
Advanced Energy Materials
Publisher
Wiley
Published
2021-08-04
Volume
11
Issue
36
ISSN
  • 1614-6832 (ISSN-L)
  • 1614-6840
OpenAlex
W3192501834
Cited by
220
References
0
Citations by year
2026: 33 · 2025: 45 · 2024: 56 · 2023: 49 · 2022: 36 · 2021: 1
FWCI
10.42
Type
journal article
Language
en
Open access
closed
Locations
Advanced Energy Materials (publishedVersion)
Funders
  • National Key Research and Development Program of China (2017YFB0102000)
  • National Natural Science Foundation of China (21875198, 22021001)
  • Fundamental Research Funds for the Central Universities (20720190040)
Topics
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Advanced Battery Materials and Technologies
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Advancements in Battery Materials
  • Physical Sciences › Engineering › Automotive Engineering › Advanced Battery Technologies Research
Keywords
localized high-concentration electrolytes, dual-salt electrolyte, high-voltage lithium-ion batteries, NCM cathode, low-temperature cycling, rate capability, lithium metal anode, graphite anode, ionic conductivity, capacity retention

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