TY - JOUR
T1 - Synthesis and characterization of polymer electrolytes based on cross-linked phenoxy-containing polyphosphazenes
AU - Tsao, Chih Hao
AU - Ueda, Mitsuru
AU - Kuo, Ping Lin
N1 - Funding Information:
The authors would like to thank the Ministry of Science and Technology, Taipei, Taiwan (ROC) within the project "Development of High-Performance, High Voltage and High Safety Lithium Ion Electrolytes" for their generous financial support of this research. Furthermore, the authors thank Dr. Shing Jong Huang in the instrumentation center of National Taiwan University for practical suggestions and discussions.
Publisher Copyright:
© 2015 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2016, 54, 352-358.
Copyright:
Copyright 2016 Elsevier B.V., All rights reserved.
PY - 2016/2/1
Y1 - 2016/2/1
N2 - A new method to prepare the polymer electrolytes for lithium-ion batteries is proposed. The polymer electrolytes were prepared by reacting poly(phosphazene)s (MEEPP) having 2-(2-methoxyethoxy)ethoxy and 2-(phenoxy)ethoxy units with 2,4,6-tris[bis(methoxymethyl)amino]-1,3,5-triazine (CYMEL) as a cross-linking agent. This method is simple and reliable for controlling the cross-linking extent, thereby providing a straightforward way to produce a flexible polymer electrolyte membrane. The 6 mol % cross-linked polymer electrolyte (ethylene oxide unit (EO)/Li = 24:1) exhibited a maximum ionic conductivity of 5.36 × 10-5 S cm-1 at 100 °C. The 7Li linewidths of solid-state static NMR showed that the ionic conductivity was strongly related to polymer segment motion. Moreover, the electrochemical stability of the MEEPP polymer electrolytes increased with an increasing extent of cross-linking, the highest oxidation voltage of which reached as high as 7.0 V. Moreover, phenoxy-containing polyphosphazenes are very useful model polymers to study the relationship between the polymer flexibility; that is, the cross-linking extent and the mobility of metal ions.
AB - A new method to prepare the polymer electrolytes for lithium-ion batteries is proposed. The polymer electrolytes were prepared by reacting poly(phosphazene)s (MEEPP) having 2-(2-methoxyethoxy)ethoxy and 2-(phenoxy)ethoxy units with 2,4,6-tris[bis(methoxymethyl)amino]-1,3,5-triazine (CYMEL) as a cross-linking agent. This method is simple and reliable for controlling the cross-linking extent, thereby providing a straightforward way to produce a flexible polymer electrolyte membrane. The 6 mol % cross-linked polymer electrolyte (ethylene oxide unit (EO)/Li = 24:1) exhibited a maximum ionic conductivity of 5.36 × 10-5 S cm-1 at 100 °C. The 7Li linewidths of solid-state static NMR showed that the ionic conductivity was strongly related to polymer segment motion. Moreover, the electrochemical stability of the MEEPP polymer electrolytes increased with an increasing extent of cross-linking, the highest oxidation voltage of which reached as high as 7.0 V. Moreover, phenoxy-containing polyphosphazenes are very useful model polymers to study the relationship between the polymer flexibility; that is, the cross-linking extent and the mobility of metal ions.
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U2 - 10.1002/pola.27781
DO - 10.1002/pola.27781
M3 - Article
AN - SCOPUS:84954402043
VL - 54
SP - 352
EP - 358
JO - Journal of Polymer Science, Part A: Polymer Chemistry
JF - Journal of Polymer Science, Part A: Polymer Chemistry
SN - 0887-624X
IS - 3
ER -
