Jorgensen, Mathias Hansen, Bjarne R. S. Lee, Young-Su Cho, Young Whan Jensen, Torben R. 2024-01-19T19:31:24Z 2024-01-19T19:31:24Z 2021-09-02 2019-08-22 1932-7447 https://pubs.kist.re.kr/handle/201004/119670 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. English American Chemical Society SUPERIONIC CONDUCTION NA LI2B12H12 BORANES AMMONIA LITHIUM Crystal Structures and Energy Storage Properties of Ammine Sodium Decahydro-closo-decaboranes (Na2B10H10 center dot nNH(3), n=1, 2) Article 10.1021/acs.jpcc.9b06084 1 The Journal of Physical Chemistry C, v.123, no.33, pp.20160 - 20166 The Journal of Physical Chemistry C 123 33 20160 20166 scie scopus 000482545700010 2-s2.0-85071499102 Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Science & Technology - Other Topics Materials Science Article SUPERIONIC CONDUCTION NA LI2B12H12 BORANES AMMONIA LITHIUM