Journal
JOURNAL OF POWER SOURCES
Volume 407, Issue -, Pages 23-30Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2018.10.045
Keywords
Solid polymer electrolyte; High salt concentration; Dual-path; Poly (ethylene carbonate); Biphasic structure
Funding
- National Natural Science Foundation of China [51773115]
- Natural Science Foundation of Jiangsu Province, China [BK20171146]
- Innovation Ability Construction Plan of Jiangsu Province, China [BM2017006]
Ask authors/readers for more resources
With the development of electrical energy storage and electrical vehicle, high safety is indispensable for lithium ion battery, therefore, high performance solid polymer electrolytes are the relentless pursuit of numerous researches. However, low ionic conductivity restricts the polymer electrolyte usage in commercialized lithium ion batteries. Among the candidates of polymer electrolytes, poly (ethylene carbonate) is promising due to its ability of high lithium salt dissociation. Nonetheless, these polymer electrolytes with high concentration salt always accompanies with an obvious deterioration of mechanical properties. Herein, via controlling the ratio of poly (ethylene carbonate) and poly (vinylidene fluoride-co-hexafluoropropene), a biphasic solid polymer electrolyte possessing high concentration lithium salt phase and good mechanical strength is prepared. Specifically, considering the role of polymer groups in lithium ion transport, it is speculated that dual-path of Li+ transport forms in the polymer electrolyte, which improves the conductivity remarkably. The prepared electrolyte realizes sufficient ionic conductivity (1.08 x 10(-4) S/cm) at 30 degrees C, with a wide electrochemical window about 4.5 V (vs. Li+/Li), meanwhile exhibits the capacity of 'suppression to lithium dendrite growth. Notably, with the polymer electrolyte, Li/LiFePO4 cell exhibits superior rate capacity and excellent cycling stability. This study proves new insights for polymer electrolyte design with high conductivity.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available