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Thermal Runaway of Nonflammable Localized High‐Concentration Electrolytes for Practical LiNi 0.8 Mn 0.1 Co 0.1 O 2 |Graphite‐SiO Pouch Cells

Journal Article · · Advanced Science
 [1];  [2];  [2];  [2];  [2];  [2];  [1];  [2];  [3];  [4];  [3];  [4];  [2]
  1. School of Materials Science and Engineering Beijing Institute of Technology Beijing 100081 P. R. China
  2. State Key Laboratory of Automotive Safety and Energy Tsinghua University Beijing 100084 P. R. China
  3. Institute of Nuclear and New Energy Technology Tsinghua University Beijing 100084 P. R. China
  4. Chemical Sciences and Engineering Division Argonne National Laboratory Lemont IL 60439 USA
Abstract

With continuous improvement of batteries in energy density, enhancing their safety is becoming increasingly urgent. Herein, practical high energy density LiNi 0.8 Mn 0.1 Co 0.1 O 2 |graphite‐SiO pouch cell with nonflammable localized high concentration electrolyte (LHCE) is proposed that presents unique self‐discharge characteristic before thermal runaway (TR), thus effectively reducing safety hazards. Compared with the reference electrolyte, pouch cell with nonflammable LHCE can increase self‐generated heat temperature by 4.4 °C, increase TR triggering temperature by 47.3 °C, decrease the TR highest temperature by 71.8 °C, and extend the time from self‐generated heat to triggering TR by ≈8 h. In addition, the cell with nonflammable LHCE presents superior high voltage cycle stability, attributed to the formation of robust inorganic‐rich electrode–electrolyte interphase. The strategy represents a pivotal step forward for practical high energy and high safety batteries.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Vehicle Technologies Office (VTO)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1886108
Alternate ID(s):
OSTI ID: 2469991
OSTI ID: 1898212
Journal Information:
Advanced Science, Journal Name: Advanced Science Journal Issue: 32 Vol. 9; ISSN 2198-3844
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

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