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一篇首次采用“質(zhì)子型有機(jī)離子塑性晶體（POIPC）”作為燃料電池質(zhì)子導(dǎo)體的論文 已有3人參與
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一篇首次采用“質(zhì)子型有機(jī)離子塑性晶體（protic organic ionic plastic crystals, POIPCs）”作為燃料電池高溫（100-200 oC）質(zhì)子導(dǎo)體的論文。 highlights（亮點）： 之一：首次提出”質(zhì)子型有機(jī)離子塑性晶體“的概念。 之二：固態(tài)（塑晶態(tài)）下的185度時，無水質(zhì)子電導(dǎo)率高達(dá)10 mS/cm。應(yīng)該是迄今為止最高的全固態(tài)質(zhì)子電導(dǎo)率之一了。 之三：該有機(jī)離子塑性晶體是不摻雜的，即pure，non-doped，避免了與摻雜物dopant的不相容問題。 探索了該質(zhì)子導(dǎo)體在復(fù)合膜中的應(yīng)用。復(fù)合膜的表征手段上也有一些有意思的地方：采用了掠入射X射線衍射（grazing incidence X-ray diffraction (GIXRD)）來表征復(fù)合膜是否成功擔(dān)載了質(zhì)子導(dǎo)體。掠入射X射線衍射可以探測復(fù)合膜在厚度方向上質(zhì)子導(dǎo)體的分布情況，而不是僅僅表面的情況（比如紅外、SEM）：The existence of crystalline 1 in the deeper layers of the composite membrane is still evident as ω increases and simultaneously the X-rays penetrate deeper into the membrane。 （// 小角掠入射是以固定的小角度入射X射線，使得X射線幾乎與薄膜表面平行。這樣X射線穿入薄膜的深度淺，但是走過的路程長，適合薄膜的研究。） 此外，也初步探討了本征（離線）與燃料電池運(yùn)行情況（“在線”）下的質(zhì)子傳導(dǎo)機(jī)理。 真誠歡迎引用，歡迎交流。 Imidazolium methanesulfonate as a high temperature proton conductor J. Mater. Chem. A, 2013,1, 2238-2247 DOI: 10.1039/C2TA00713D Imidazolium methanesulfonate (1) has been studied as a model proton conductor for high temperature polymer electrolyte membrane fuel cells (PEMFCs). It is found that 1 undergoes transformation from crystalline to plastic crystalline and then molten states successively from ambient temperature to 200 °C. The solid–solid phase transition of 1 at 174 °C has been preliminarily verified by differential scanning calorimetry (DSC) and temperature-dependent X-ray diffraction (XRD). At the melting point of 188 °C, 1 displays a low entropy of fusion of around 24 J mol−1 K−1. In particular, a high ionic conductivity of 1.0 × 10−2 S cm−1 is reached at 185 °C in the plastic phase. The activation energy for ionic conduction decreases as 1 is heated from the crystal phase to the melt phase. In the molten state, the contribution of protons to the ionic conductivity of 1 was corroborated electrochemically. In addition, 1 is electrochemically active for H2 oxidation and O2 reduction at a Pt electrode while it shows a high electrochemical window of 2.0 V. Furthermore, a Nafion® membrane has been successfully doped with 1, as identified by infrared spectroscopy, powder XRD, grazing incidence XRD and thermogravimetric analysis. To the best of our knowledge, this may be the first report on a protic organic ionic plastic crystal (OIPC) consisting of protonated imidazole (C3H5N2+) and an organic anion. The good thermal stability, high ionic conductivity, wide electrochemical window, favorable plastic crystal behavior and simple synthesis make 1 a highly interesting model proton conductor for high temperature PEMFCs. protic organic ionic plastic crystal.gif 已被引5次： Crystal Structure and Solid-state Ionic Conductivity of Cyclic Sulfonylamide Salts with Cyano-substituted Quaternary Ammonium Cations 作者: Moriya, Makoto; Watanabe, Takaaki; Nabeno, Shohei; 等. CHEMISTRY LETTERS 卷: 43 期: 1 頁: 108-110 出版年: JAN 5 2014 Bis-quaternary ammonium cation-based organic ionic plastic crystals: plastic crystal behaviour and ionic liquid properties above melting points Chengzhen Shi, Shichao Li, Wei Zhang, Lihua Qiu and Feng Yan J. Mater. Chem. A, 2013, 1, 13956 DOI: 10.1039/c3ta12712e A novel proton exchange membrane prepared from imidazole metal complex and Nafion for low humidity Lijia Yang, Beibei Tang and Peiyi Wu Journal of Membrane Science, 2014, 467, 236 DOI: 10.1016/j.memsci.2014.05.033 Simple synthesis of ironIII sulfophenyl phosphate nanosheets as a high temperature inorganic–organic proton conductor Guohong Liu, Zhongfang Li, Lei Jin and Suwen Wang Ionics, 2014 DOI: 10.1007/s11581-014-1109-0 An organic ionic plastic crystal electrolyte for rate capability and stability of ambient temperature lithium batteries Liyu Jin, Patrick C. Howlett, Jennifer M. Pringle, Judith Janikowski, Michel Armand, Douglas R. MacFarlane and Maria Forsyth Energy Environ. Sci., 2014, Advance Article DOI: 10.1039/C4EE01085J |
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歡迎監(jiān)督和反饋：小木蟲僅提供交流平臺，不對該內(nèi)容負(fù)責(zé)。
本內(nèi)容由用戶自主發(fā)布，如果其內(nèi)容涉及到知識產(chǎn)權(quán)問題，其責(zé)任在于用戶本人，如對版權(quán)有異議，請聯(lián)系郵箱：xiaomuchong@tal.com - 附件 1 : Imidazolium_methanesulfonate_as_a_high_temperature_proton_conductor.pdf
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2014-08-07 22:33:09, 567.96 K
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