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Advanced Electrolytes for Fast‐Charging High‐Voltage Lithium‐Ion Batteries in Wide‐Temperature Range

Journal Article · · Advanced Energy Materials
 [1];  [2];  [2];  [3];  [2];  [3];  [3];  [3];  [3];  [3];  [4];  [5];  [5];  [6];  [3];  [7];  [7];  [2];  [3];  [3]
  1. 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
  2. Environmental Molecular Sciences Laboratory Pacific Northwest National Laboratory Richland WA 99354 USA
  3. Energy and Environment Directorate Pacific Northwest National Laboratory Richland WA 99354 USA
  4. Physical and Computational Science Directorate Pacific Northwest National Laboratory Richland WA 99354 USA
  5. Chemical Sciences and Engineering Division Argonne National Laboratory Lemont IL 60439 USA
  6. American Lithium Energy Corporation Carlsbad CA 92008 USA
  7. 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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