Journal
JOURNAL OF POWER SOURCES
Volume 279, Issue -, Pages 6-12Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2014.12.150
Keywords
Nonflammable electrolyte; Dimethyl methyl phosphonate; Safety; Alloy anode; Lithium ion battery
Funding
- National Basic Research Program of China [2015CB251105]
- National Science Foundation of China [21173160, 21373155]
- Program for New Century Excellent Talents in University [NCET-12-0419]
- Hubei National Funds for Distinguished Young Scholars [2014CFA038]
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The safety of lithium ion batteries has long been a critical obstacle for their high-power and large-scale applications because of the flammable nature of their carbon anode and organic carbonate electrolytes. To eliminate the potential safety hazards, lithium ion batteries should be built up with thermal-stable electrodes and nonflammable electrolytes. Here we report safer lithium ion batteries using nonflammable phosphonate electrolyte, thermal-stable LiFePO4 cathode and alloy anodes. Benefiting from the electrochemical compatibility and strong fire-retardancy of the phosphonate electrolyte, the cathode and anode materials in the nonflammable phosphonate electrolyte demonstrate similar charge-discharge performances with those in the conventional carbonate electrolyte, showing a great prospect for large-scale applications in electric vehicles and grid-scale electric energy storage.
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