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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 15    No. 1    February 2005

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Preparation and characterization of 
high salts polymer electrolyte based on
poly(lithium acrylate)
TANG Ai-dong(唐爱东), HUANG Ke-long(黄可龙),
PAN Chun-yue(潘春跃), LU Cui-hong(卢翠红)

School of Chemistry and Chemical Engineering, Central South University,
Changsha 410083,China

Abstract:Novel polymer electrolytes were prepared by highly mixing poly(lithium acrylate)(PPALi) with eutectic lithium salts of lithium acetate and lithium nitrate. Poly(lithium acrylate) was preparaed by inverse emulsion polymerization from crylic acid and LiOH. Phase transition temperatures were measured for all the eutectic lithium of binary system samples as a function of the concentration of Li(CH3COO),  and the mixtures exhibit the lowest phase transition temperatures of (448±2)K at about 50% (mass fraction) Li(CH3COO). Thermogravimetry (TG) and X-ray diffraction (XRD) analysis indicate the formation of a novel polymer-salt complex. The highest conductivity (approximately 4.97×10-5S•cm-1) is found at room temperature with the electrolyte composition of eutectic mixture of about 80% (mass fraction), poly(lithium acrylate)20% under quickly cooling condition, which is 150% higher than that under natural cooling condition.

 

Key words: polymer electrolyte; thermal stability; ionic conductivity

ISSN 1672-7029
CN 43-1423/U

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