高等学校化学学报 ›› 2022, Vol. 43 ›› Issue (1): 20210657.doi: 10.7503/cjcu20210657

• 研究论文 • 上一篇    下一篇

多核多氧硫钼酸盐化合物的合成及质子传导性能

李波, 孟禹汐, 王雯雯, 臧宏瑛()   

  1. 东北师范大学化学学院, 多酸与网格材料化学教育部重点实验室, 长春 130024
  • 收稿日期:2021-09-13 出版日期:2022-01-10 发布日期:2021-10-09
  • 通讯作者: 臧宏瑛 E-mail:zanghy100@nenu.edu.cn
  • 基金资助:
    国家自然科学基金(21871042);吉林省自然科学基金(20200201083JC);中央高校经费研究基金(2412015KJ012)

Synthesis and Proton Conductivity of Polynuclear Polyoxothiomolybdate Compound

LI Bo, MENG Yuxi, WANG Wenwen, ZANG Hongying()   

  1. Key Laboratory of Polyacid and Mesh Material Chemistry of Ministry of Education,College of Chemistry,Northeast Normal University,Changchun 130024,China
  • Received:2021-09-13 Online:2022-01-10 Published:2021-10-09
  • Contact: ZANG Hongying E-mail:zanghy100@nenu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(21871042);the Natural Science Foundation of Jilin Province, China(20200201083JC);the Central University Funding Research Fund of China(2412015KJ012)

摘要:

质子交换膜燃料电池(PEMFC)因能量转化率高、 污染小、 工作温度低、 启动速度快而被广泛应用. Nafion系列膜成本高、 结构特性模糊, 阻碍了质子传导性能的进一步提高和对传导机理的精确理解. 因此开发具有结构明确、 传导路径清晰的高质子传导率的晶态材料对于燃料电池领域具有重要意义. 本文利用有机配体5-羟基间苯二甲酸作为模板诱导[Mo2S2O2]2+阳离子, 自组装成一种多核多氧硫钼酸盐簇[N(CH3)4]2H2· [(Mo2S2O2)8(OH)16(C8O5H4)2]·22H2O(Mo16). 该化合物清晰明确的结构和结构中存在的密集氢键网络可用于进行质子传导性能的研究. 交流阻抗测试结果表明, Mo16在宽温度范围内具有较高的质子传导性能. 在97%湿度(RH), 85 ℃条件下其质子传导率可达1.9×10-2 S/cm, 表明该化合物具有作为高效质子导体的良好前景.

关键词: 多氧硫钼酸盐, 自组装, 质子传导

Abstract:

Proton exchange membrane fuel cell(PEMFC) is widely used for its high energy conversion rate, low pollution, low working temperature and fast start-up speed. The high cost and fuzzy structural characteristics of Nafion membranes hinder the further improvement of proton conduction performance and the accurate understanding of conduction mechanism. The development of crystalline materials with high proton conductivity with clear structures and clear conduction paths is of great significance to the field of fuel cells. Here, a novel polynuclear polyoxothiomolybdate cluster [N(CH342H2[(Mo2S2O28(OH)16(C8O5H42]·22H2O(Mo16) was got via using the organic ligand 5-hydroxyisophthalic acid as a template to induce the occurrence of self-assembly reaction of [Mo2S2O22+. The clear structure and the dense hydrogen bond network in the structure can be used for the study of proton conductivity. The alternating current(AC) impedance test results show that Mo16 has high proton conductivity in a wide temperature range. Its proton conductivity can attain 1.9×10-2 S/cm at 97% relative humidity(RH) and 85 ℃. It shows that the compound has good prospects as a high-efficiency proton conductor.

Key words: Polyoxothiomolybdate(POTM), Self-assembly, Proton conduction

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