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Electrochemical Properties of LLTO/Fluoropolymer-Shell Cellulose-Core Fibrous Membrane for Separator of High Performance Lithium-Ion Battery

Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, Wuxi 214122, China
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Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editor: Federico Bella
Materials 2016, 9(2), 75; https://doi.org/10.3390/ma9020075
Received: 2 December 2015 / Revised: 13 January 2016 / Accepted: 21 January 2016 / Published: 26 January 2016
A superfine Li0.33La0.557TiO3 (LLTO, 69.4 nm) was successfully synthesized by a facile solvent-thermal method to enhance the electrochemical properties of the lithium-ion battery separator. Co-axial nanofiber of cellulose and Poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) was prepared by a co-axial electrospinning technique, in which the shell material was PVDF-HFP and the core was cellulose. LLTO superfine nanoparticles were incorporated into the shell of the PVDF-HFP. The core–shell composite nanofibrous membrane showed good wettability (16.5°, contact angle), high porosity (69.77%), and super electrolyte compatibility (497%, electrolyte uptake). It had a higher ionic conductivity (13.897 mS·cm−1) than those of pure polymer fibrous membrane and commercial separator. In addition, the rate capability (155.56 mAh·g−1) was also superior to the compared separator. These excellent performances endowed LLTO composite nanofibrous membrane as a promising separator for high-performance lithium-ion batteries. View Full-Text
Keywords: LLTO; electrospinning; nanofiber; separator LLTO; electrospinning; nanofiber; separator
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Huang, F.; Liu, W.; Li, P.; Ning, J.; Wei, Q. Electrochemical Properties of LLTO/Fluoropolymer-Shell Cellulose-Core Fibrous Membrane for Separator of High Performance Lithium-Ion Battery. Materials 2016, 9, 75.

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