Journal
SCRIPTA MATERIALIA
Volume 190, Issue -, Pages 153-157Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2020.08.053
Keywords
PVDF; Na2Ni[Fe(CN)(6)]; Combination; Separator; Sodium-ion batteries
Categories
Funding
- NSFC [U16321611]
- Natural Science Foundation of Anhui Province [KJ2019A0723, 1808085QE154, 1808085JQ13, gxgnfx2019024]
- Research Funds for Hefei Normal University [2019ylkc02, 201814098170, 201914098201]
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A flexible separator@electrode combination was obtained by direct electrospinning poly(vinylidene fluoride) (PVDF)/Si(3)N(4 )blend solution on the Na2Ni[Fe(CN)(6)] electrode, showing unique advantages in porosity, ionic conductivity, and excellent electrochemical performance.
By direct electrospinning poly(vinylidene fluoride) (PVDF)/Si(3)N(4 )blend solution on the Na2Ni[Fe(CN)(6)] electrode, a flexible separator@electrode combination is obtained. This combination is closely cross-linked by the -CH2-CF2- chain of beta-PVDF in the separator and electrode, which delivers unique advantages in flexibility, thermal stability, tensile strength and interfacial resistance. Meanwhile, the PVDF/Si3N4 separator has a higher porosity (84.2%) and ionic conductivity (4.1 x 10(-3) S cm(-1)), making the combination display an excellent electrochemical performance with a high initial coulombic efficiency of 96.8%, capacity retention rate of 92.2% after 503 cycles and rate capability of 78 mAh g(-1) at 5 C. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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