Advanced Electrolytes for Fast‐Charging High‐Voltage Lithium‐Ion Batteries in Wide‐Temperature Range
- Energy and Environment Directorate Pacific Northwest National Laboratory Richland WA 99354 USA, Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo Zhejiang 315201 China
- Environmental Molecular Sciences Laboratory Pacific Northwest National Laboratory Richland WA 99354 USA
- Energy and Environment Directorate Pacific Northwest National Laboratory Richland WA 99354 USA
- Physical and Computational Science Directorate Pacific Northwest National Laboratory Richland WA 99354 USA
- Chemical Sciences and Engineering Division Argonne National Laboratory Lemont IL 60439 USA
- American Lithium Energy Corporation Carlsbad CA 92008 USA
- Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo Zhejiang 315201 China
Abstract
LiNi x Mn y Co 1− x − y O 2 (NMC) cathode materials with Ni ≥ 0.8 have attracted great interest for high energy‐density lithium‐ion batteries (LIBs) but their practical applications under high charge voltages (e.g., 4.4 V and above) still face significant challenges due to severe capacity fading by the unstable cathode/electrolyte interface. Here, an advanced electrolyte is developed that has a high oxidation potential over 4.9 V and enables NMC811‐based LIBs to achieve excellent cycling stability in 2.5–4.4 V at room temperature and 60 °C, good rate capabilities under fast charging and discharging up to 3C rate (1C = 2.8 mA cm −2 ), and superior low‐temperature discharge performance down to −30 °C with a capacity retention of 85.6% at C/5 rate. It is also demonstrated that the electrode/electrolyte interfaces, not the electrolyte conductivity and viscosity, govern the LIB performance. This work sheds light on a very promising strategy to develop new electrolytes for fast‐charging high‐energy LIBs in a wide‐temperature range.
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- EE0008444; AC05-76RL01830; AC02-06CH11357
- OSTI ID:
- 1615420
- Alternate ID(s):
- OSTI ID: 1633412
OSTI ID: 23098867
- Journal Information:
- Advanced Energy Materials, Journal Name: Advanced Energy Materials Journal Issue: 22 Vol. 10; ISSN 1614-6832
- Publisher:
- Wiley Blackwell (John Wiley & Sons)Copyright Statement
- Country of Publication:
- Germany
- Language:
- English
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