期刊
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷 111, 期 9, 页码 3327-3331出版社
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1314615111
关键词
fluorinated polymers; nonflammable electrolytes
资金
- Office of Naval Research [N00014-10-10550]
- National Science Foundation [DMR-1122483]
- Natural Sciences and Engineering Research Council of Canada
- US Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-SC0001011]
- US Department of Energy, Office of Energy Efficiency and Renewable Energy [DE-EE0003188]
- Office of Vehicle Technologies of the US Department of Energy [DE-AC02-05CH11231]
The flammability of conventional alkyl carbonate electrolytes hinders the integration of large-scale lithium-ion batteries in transportation and grid storage applications. In this study, we have prepared a unique nonflammable electrolyte composed of low molecular weight perfluoropolyethers and bis(trifluoromethane)sulfonimide lithium salt. These electrolytes exhibit thermal stability beyond 200 degrees C and a remarkably high transference number of at least 0.91 (more than double that of conventional electrolytes). Li/LiNi1/3Co1/3Mn1/3O2 cells made with this electrolyte show good performance in galvanostatic cycling, confirming their potential as rechargeable lithium batteries with enhanced safety and longevity.
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