Synthesis of a Ternary Thiostannate with 3D Channel Decorated by Hydronium for High Proton Conductivity

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• 作者：Dan Zhang ; Guangshe Li ; Yu Peng ; Liping Li
• 刊名：Inorganic Chemistry
• 出版年：2017
• 出版时间：January 3, 2017
• 年：2017
• 卷：56
• 期：1
• 页码：208-212
• 全文大小：363K
• ISSN：1520-510X

文摘

Metal chalcogenides with various channel structures feature a number of interesting properties including fast-ion conductivity and selective ion exchange. Most of these compounds are popularly prepared based on the templates of organic amines that play the part of a structure directing agent and even structure-building units, while it still remains a challenge as to the organotemplate-free synthesis for these compounds. Here, a new ternary thiostannate (H₃O)₄Cu₈Sn₃S₁₂ was synthesized through a facile, efficient, and organotemplate-free route under hydrothermal conditions. The framework of (H₃O)₄Cu₈Sn₃S₁₂ consists of [Cu₈Sn₆S₂₄]^8– building units and possesses a 3D interconnected 8-ring channel structure decorated by pure hydroniums, which not only balance the charges but also facilitate the proton conductivity. The proton conductivity reaches as high as 1.03 × 10^–3 S cm^–1 at 393 K under anhydrous conditions, which is 2 orders of magnitude higher than that of (H₃O)₂(enH₂)Cu₈Sn₃S₁₂, a similar channel structure compound prepared by using ethylenediamine as an organic template.