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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Crystal Structures and Energy Storage Properties of Ammine Sodium Decahydro-closo-decaboranes (Na2B10H10 center dot nNH(3), n=1, 2)
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Crystal Structures and Energy Storage Properties of Ammine Sodium Decahydro-closo-decaboranes (Na2B10H10 center dot nNH(3), n=1, 2)

机译：氨钠甲基咖啡蛋白酶 - 癸镁 - 癸烷烃的晶体结构和能量储存性能（Na2b10h10中心点Nnh（3），n = 1,2）

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摘要

Metal closo-boranes show remarkable thermal and chemical stabilities, making them appealing candidates for a wide range of applications, such as electrolytes in electrochemical batteries and ammonia storage for indirect hydrogen storage. Furthermore, owing to the large size and nonspherical geometry of the anion (e.g., B10H102- or B12H122-) metal closo-boranes display a rich structural diversity and thermal polymorphism. Here, we present the synthesis, characterization, and structural determination of the ammoniated metal closo-boranes, Na2B10H10 center dot nNH(3) (n = 1, 2). The thermal decomposition of Na(2)B(10)H(10 center dot)2NH(3) was investigated with synchrotron radiation in situ powder X-ray diffraction and simultaneous thermogravimetric analysis, differential scanning calorimetry, and mass spectrometry, revealing a reversible ammonia storage capacity of 15 wt % below 150 degrees C. Additionally, ionic conductivities of 2.7 X 10(-8) (RT) and 4.7 X 10(-8) S/cm (30 degrees C) for Na2B10H10 center dot 2NH(3) and Na2B10H10 center dot NH3, respectively, were measured with electrochemical impedance spectroscopy. A lower Na+ conductivity compared to the parent compound, Na2B10H10, is explained by an anchoring effect of ammonia in the rigid framework of the B10H102- anions.
机译：金属梭菌显示出显着的热和化学稳定性，使其吸引人的候选人，用于各种应用，如电化学电池的电解质和用于间接储氢的氨储存。此外，由于阴离子的大尺寸和非球形几何形状（例如，B10H102-或B12H122-）金属型硼砂显示富有的结构分集和热多态性。这里，我们介绍了氨化金属型号硼烷的合成，表征和结构测定，Na 2b10H10中心点NNH（3）（n = 1,2）。通过原位粉末X射线衍射和同时热重分析，差分扫描量热法和质谱，研究了Na（2）B（10）H（10）H（10中心点）2NH（10）H（10中心点）2NH（3）的热分解，透露了可逆的氨储存能力低于150℃的15wt％。另外，对于NA2B10H10中心点2NH（3，离子电导率为2.7×10（-8）（RT）和4.7×10（-8）s / cm（30℃）（3 ）和Na2b10H10中央点NH3分别用电化学阻抗光谱测量。与母体化合物Na 2B10H10相比的较低的Na +导电是通过氨在B10H102-阴离子的刚性框架中的锚定作用来解释。

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