Journal
JOURNAL OF POWER SOURCES
Volume 353, Issue -, Pages 95-103Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2017.03.141
Keywords
Electrodeposition; Sulfonated poly(allyl phenyl ether); Solid ionic conductor; Thin film; Polymer
Funding
- Aix Marseille Excellence Initiative (A*MIDEX) International Mediterranee program
- Franco-Italian University (Vinci program, PhD co-tutela grants) [2015 C2-39, 2016 C2-51]
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Single Li-ion conducting p-sulfonated poly(allyl phenyl ether) (SPAPE) is electrochemically synthesized directly on TiO2 nanotubes in the range of -1.5 to -1.8 V vs. Ag/AgCl. The electrochemical deposition conditions are studied by cyclic voltammetry and chronoamperometry; the polymer formation can be followed by electrochemical impedance spectroscopy. The polymer structure is analyzed by NMR and FTIR spectroscopies, showing the formation of linear aliphatic chains with methyl-oxy-benzene sulfonate side groups. SEM observations of the polymer morphology show that a thin (similar to 300 nm) and continuous layer is obtained depending on the electrochemical synthesis conditions. The combination of a mobile aliphatic backbone, ether groups with reduced cation affinity and immobile anions grafted on the side chains allows obtaining a single lithium-ion conducting polymer. Half-cell battery tests against Li metal show an excellent cycling performance with high areal capacity (up to 110 mu Ah cm(-2)) and very good retention especially at large C-rates, studied up to 12 C. (C) 2017 Elsevier B.V. All rights reserved.
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