Fundamental Studies on Ionic Liquids and Ion Gels for Functional Materials

功能材料用离子液体和离子凝胶的基础研究

• 批准号: 16205024
• 负责人: WATANABE Masayoshi
• 金额: $ 32.28万
• 依托单位: Yokohama National University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-16205024/
• 关键词: ionic liquid; ion gel; task specific ionic liquid; ionicity; proton conduction; fuel cell; electron transport; dye-sensitized solar cell; リチウム電池; プロトン伝導性; 電子輸送性; ダイナミックス; 混合伝導性; 磁場勾配NMR; 拡散係数; Coupling; Decoupling; パルス磁場勾配NMR

This study has aimed at understanding fundamental properties of ionic liquids and ion gels and at making new concept for their functionalization as new materials. Efforts have been focused on(1)Ion dynamics and "ionicity" of ionic liquids and ion gels(2)Development of thermally stable proton-conducting ionic liquids and ion gels under non-humid conditions and their application to fuel cells at > 1000C(3)Electron transporting ionic liquids and ion gels and their application to dye-sensitized solar cellsIon dynamics in common ionic liquids has been systematically explored by means of ionic conductivity measurements and pulsed-gradient spin echo NMR (pgse-NMR) measurements, and "ionicity" of the ionic liquids was proposed based on the both measurements. The ionicity corresponds to the self-dissociation degree of the ionic liquids and was found to closely correlate with Lewis acidity of the cations and Lewis basicity of the anions. It has been revealed by this study that the ionicity is lo … More wer than unity for the ionic liquids, indicating the formation of ionic clusters. Regarding to proton conducting ionic liquids, the existence of Grotthuss-type proton transfer through the hydrogen-bonding network formed in the ionic liquids was clearly demonstrated in this study for the first time, which greatly enhances the proton diffusivity and the proton transference number. Also it was discovered in this study that hydrogen oxidation and oxygen reduction occurs at the interface between the ionic liquids and Pt, which opens up the possible application of the proton conducting ionic liquids as electrolyte of fuel cells under non-humid and medium temperature operation. Thorough the investigation of more than 70 proton-conducting ionic liquids, diethylmethylammonium trifluoromethanesulfonate was found to exhibit excellent properties as fuel cell electrolyte in terms of high proton conductivity, high thermal stability, and facile electrochemical reactions at the interface. Furthermore, polyiodide ions in ionic liquids transport electron through electron self-exchange reactions, quite interestingly which is only observed in ionic liquids and not in molecular liquids. The ionic liquids containing polyiodide ions have been utilized in dye-sensitized solar cells, long-term stability of which is greatly enhanced, compared with solar cells using molecular solvents, without losing the photo-electron conversion efficiency. The ionic liquid electrolytes can be solidified by the addition of nanoparticle with the acceleration of the charge transport rate. Less

本研究旨在了解离子液体和离子凝胶的基本性质，并为它们作为新材料的功能化提出新的概念。研究的重点是：（1）离子液体和离子凝胶的离子动力学和“离子性”;（2）在非潮湿条件下热稳定的质子传导离子液体和离子凝胶的开发及其在> 1000 ℃燃料电池中的应用;（3）电子传输离子液体和离子凝胶及其在染料电池中的应用。敏化太阳能电池通过离子电导率测量和脉冲梯度自旋回波核磁共振，系统地研究了常见离子液体中的离子动力学（pgse-NMR）测量，并且基于这两种测量提出了离子液体的“离子性”。离子性与离子液体的自离解度相对应，并与阳离子的刘易斯酸性和阴离子的刘易斯碱性密切相关。研究表明，在大气中，电离度随温度的升高而降低， ...更多信息 对离子液体来说，离子簇的形成是不一致的。对于质子导电离子液体，首次明确证明了通过离子液体中形成的氢键网络进行的Grotthuss型质子转移，极大地提高了质子扩散率和质子转移数。同时发现在离子液体与Pt的界面处发生了氢氧化和氧还原反应，这为质子导电离子液体作为燃料电池电解质在非潮湿和中温条件下的应用开辟了可能。通过对70多种质子导电离子液体的研究，发现三氟甲磺酸二乙甲基铵作为燃料电池电解质具有良好的质子导电性、热稳定性和界面电化学反应能力。此外，离子液体中的多碘离子通过电子自交换反应来传输电子，非常有趣的是，这仅在离子液体中观察到，而在分子液体中没有观察到。含有多碘离子的离子液体已经用于染料敏化太阳能电池中，与使用分子溶剂的太阳能电池相比，其长期稳定性大大提高，而不损失光电子转换效率。纳米粒子的加入可以加速离子液体电解质的电荷传输速率，使其固化。少

项目成果

Upper Critical Solution Behavior of Poly(N-isopropyacrylamide) in an Ionic Liquid and Preparation of Thermo-sensitive Nonvolatile Gels

聚(N-异丙基丙烯酰胺)在离子液体中的上临界溶液行为及热敏非挥发性凝胶的制备

• 发表时间: 2006
• 期刊: Chem. Lett. 35
• 作者: T. Ueki;M. Watanabe
• 通讯作者: M. Watanabe

Difference in lower critical solution temperature behavior between random copolymers and a homopolymer having solvatophilic and solvatophobic structures in an ionic liquid.

• DOI: 10.1021/jp0670900
• 发表时间: 2007-02
• 期刊: The journal of physical chemistry. B
• 作者: T. Ueki;T. Karino;Y. Kobayashi;M. Shibayama;M. Watanabe

高分子電気化学に関する研究(電気化学会学術賞紹介記事)

高分子电化学研究（电化学会学术奖介绍文章）

• 发表时间: 2006
• 期刊: Electrochemistry 74
• 作者: Seiji Ogo;et al.;村上 晴輝;渡邉正義
• 通讯作者: 渡邉正義

Effect of binder polymer structures used in composite cathodes on interfacial charge transfer processes in lithium polymer batteries

• DOI: 10.1016/j.electacta.2003.12.065
• 发表时间: 2004-11
• 期刊: Electrochimica Acta
• 影响因子: 6.6
• 作者: S. Seki;S. Tabata;S. Matsui;M. Watanabe

Ionic liquid crystal as a hole transport layer of dye-sensitized solar cells

• DOI: 10.1039/b417610c
• 发表时间: 2005-01-01
• 期刊: CHEMICAL COMMUNICATIONS
• 影响因子: 4.9
• 作者: Yamanaka, N;Kawano, R;Yanagida, S
• 通讯作者: Yanagida, S