Abstract
To improve the safety of lithium-ion battery, one multicomponent (MC) additive is used in a LiPF6 baseline electrolyte, which is called flame-retardant electrolyte. The flammability and thermal stability of both electrolytes were investigated by means of burning test and C80 microcalorimeter. It was found that the additions can reduce the flammability, decrease the heat generation, and delay the onset temperature of the major exothermic reactions. Furthermore, the electrochemical performances of LiFePO4/Li half cells with baseline and flame-retardant electrolytes were evaluated, respectively. With the MC additive, the resistance of flame-retardant electrolyte didn’t increase, and the cycling performances of LiFePO4/Li half cells were enhanced effectively at the rate of 0.1 C. Therefore, the MC additive improves the thermal stability and does not worsen the battery electrochemical performance with LiFePO4 cathode, thus, the combination is a promising additive for the safer lithium-ion battery.
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Abbreviations
- Δt :
-
Change in temperature (°C)
- c :
-
Specific heat capacity (J/(kg °C))
- m :
-
Mass (kg)
- Q :
-
Heat gained or lost by a substance (J)
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Acknowledgment
This work is supported by the National Natural Science Foundation of China (No. 51176183), the External Cooperation Program of BIC, Chinese Academy of Sciences, (No.211134KYSB20150004). Dr. Q.S Wang is supported by the Program for New Century Excellent Talents in University (No. NCET-12-0514).
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Feng, L., Wang, Q., Ai, C., Sun, J. (2017). The Effect of Multicomponent Electrolyte Additive on LiFePO4-Based Lithium Ion Batteries. In: Harada, K., Matsuyama, K., Himoto, K., Nakamura, Y., Wakatsuki, K. (eds) Fire Science and Technology 2015. Springer, Singapore. https://doi.org/10.1007/978-981-10-0376-9_16
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DOI: https://doi.org/10.1007/978-981-10-0376-9_16
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