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Title: High-Voltage and High-Safety Practical Lithium Batteries with Ethylene Carbonate-Free Electrolyte

Journal Article · · Advanced Energy Materials
ORCiD logo [1];  [1];  [2];  [3];  [1];  [4];  [1];  [1];  [1];  [1];  [1];  [3];  [3];  [1];  [1];  [5];  [6];  [1]
  1. Tsinghua Univ., Beijing (China)
  2. Tsinghua Univ., Beijing (China); Argonne National Lab. (ANL), Lemont, IL (United States)
  3. Argonne National Lab. (ANL), Lemont, IL (United States)
  4. Univ. of Shanghai for Science and Technology (China)
  5. Peking Univ., Beijing (China)
  6. Argonne National Lab. (ANL), Lemont, IL (United States); Stanford Univ., CA (United States); Imam Abdulrahman Bin Faisal Univ. (IAU), Dammam (Saudi Arabia)

Serious safety issues are impeding the widespread adoption of high-energy lithium-ion batteries for transportation electrification and large-scale grid storage. Herein, a triple-salt ethylene carbonate (EC) free electrolyte for high-safety and high-energy pouch-type LiNi0.8Mn0.1Co0.1O2|graphite (NMC811|Gr) cells is reported. This EC-free electrolyte can effectively stabilize the NMC811 surface under high potential (up to 4.5 V), as well as generate a stable interphase to achieve a superior compatibility with the Gr anode. The electrolyte strategy enables significantly enhanced intrinsic safety (trigger temperature of thermal runaway (TR) increased by 67.0 °C), excellent electrochemical properties (4.2V, ≈100% after 200 cycles), and superior high voltage stability (4.5 V, 82.1% after 200 cycles). Furthermore, the work opens up a new avenue for developing novel electrolyte systems to build safer high-energy batteries for practical applications.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1840927
Alternate ID(s):
OSTI ID: 1828420
Journal Information:
Advanced Energy Materials, Journal Name: Advanced Energy Materials Journal Issue: 47 Vol. 11; ISSN 1614-6832
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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