Proton-Conductive Composites Composed of Phosphoric Acid-Doped Silica Gel and Organic Polymers with Sulfo Groups
Proton-Conductive Composites Composed of Phosphoric Acid-Doped Silica Gel and Organic Polymers with Sulfo Groups
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磷酸掺杂硅胶与磺基有机聚合物的质子传导复合材料
DOI：
10.2109/jcersj.108.45
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发表时间：
2000
影响因子：
1.1
通讯作者：
T. Minami
中科院分区：
文献类型：
--
作者：
A. Matsuda;Kazuki Hirata;M. Tatsumisago;T. Minami
以H3 PO 4掺杂的硅胶和含磺酸基的有机聚合物为原料，成功地制备了高质子导电性的热塑性复合材料。发现有机聚合物中的磺基和聚苯乙烯嵌段分别改善了所得复合材料的质子传导性和成型特性。当H3 PO 4/SiO2摩尔比为0.5时，H3 PO 4掺杂硅胶的质量分数为80%，磺化苯乙烯-异戊二烯-苯乙烯（SIS-SO 3 H）嵌段共聚物的质量分数为20%，复合材料在25°C干燥N2气氛下的电导率为10-4S·cm-1，具有良好的成型性能。复合材料的电导率的温度依赖性是Vogel-Tamman-Fulcher型的，表明质子通过由硅胶和有机聚合物组成的复合材料中存在的类液相转移。复合材料的弹性模量比SIS-SO_3 H弹性体大1 ~ 2个数量级。复合材料的热塑性变形温度约为130°C，比SIS弹性体本身的热塑性变形温度高50°C。使用该复合材料作为固体电解质制备的全固态双电层电容器的电容与使用液体电解质的常规电容器的电容相当。
Preparation of highly proton-conductive and thermoplastic composites was successfully pursued from H3PO4-doped silica gel and organic polymers with sulfo groups. The sulfo groups and polystyrene blocks in the organic polymers were found to improve the proton conductivity and molding characteristics of the resultant composite, respectively. The composite composed of H3PO4-doped silica gel with a molar ratio=0.5 of H3PO4/SiO2 in 80mass% and sulfonated styrene-isoprene-styrene (SIS-SO3H) block copolymer in 20 mass% showed a high electrical conductivity of 10-4S·cm-1 at 25°C in dry N2 atmosphere and good molding characteristics. The temperature dependence of the electrical conductivity of the composite was of the Vogel-Tamman-Fulcher type, indicating that proton transferred through a liquid-like phase present in the composites consisting of silica gel and organic polymer. The elastic modulus of the composite was larger by one to two orders of magnitude than that of the SIS-SO3H elastomer. The thermoplastically deforming temperature of the composite was around 130°C, which was higher by 50°C than that of the SIS elastomer itself. The capacitance of a totally solid state electric double-layer capacitor, which was fabricated using the composite as a solid electrolyte, was comparable to those of the conventional capacitors with liquid electrolytes.