Journal
JOURNAL OF POWER SOURCES
Volume 391, Issue -, Pages 113-119Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2018.04.060
Keywords
Lithium ion battery; Safety; Nanoparticle; Hybrid electrolyte
Funding
- National Key R&D Program of China [2016YFB0100100]
- Strategic Priority Research Program of Chinese Academy of Sciences (CAS) [XDA09010101]
- National Natural Science Foundation of China [21773279, 51403227]
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One of the crucial challenge for developing high safety and high voltage lithium ion batteries is to find a reliable electrolyte system. In this work, we report a kind of hybrid electrolytes, which are used for high-voltage lithium ion batteries and are expected to be able to effectively enhance the battery safety. The hybrid electrolytes are obtained by incorporating silane-Al2O3 (Al2O3-ST) into liquid electrolyte, which combines the merits of both solid electrolyte and liquid electrolyte. The Al2O3-ST nanoparticles help to increase lithium-ion transference number and to enhance battery safety, while liquid electrolyte contributes to high ionic conductivity. The cycling stability and rate capacity of LiNi0.5Mn1.5O4/Li batteries are improved by using the hybrid electrolytes. Nail-penetration tests indicate that LiNi0.6Mn0.2Co0.2O2/graphite battery with hybrid electrolyte owns obviously enhanced safety than that using traditional liquid electrolyte. This work provides new insight on electrolyte design for high-safety high-voltage lithium ion batteries.
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