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   Microwave-assisted hydrothermal synthesis and electrochemical studies of α- and h-MoO3  
   
نویسنده Galina S. Zakharova ,Christina Schmidt ,Alexander Ottmann ,Ewa Mijowska ,Rüdiger Klingeler
منبع journal of solid state electrochemistry - 2018 - دوره : 22 - شماره : 12 - صفحه:3651 -3661
چکیده    two modifications of molybdenum trioxide with orthorhombic (α-moo3) and hexagonal (h-moo3) crystal structure have been synthesized by a microwave-assisted hydrothermal method, facilitated by formic acid. characterization by means of x-ray diffraction, scanning electron microscopy, specific surface analysis, and fourier-transform infrared, raman, and uv-vis spectroscopy reveals phase-pure crystalline powder samples of hexagonal h-moo3 microrods and of α-moo3 nanobelt bundles, respectively. the electrochemical properties of the moo3 compounds, studied by cyclic voltammetry and galvanostatic cycling vs. li/li+, strongly depend on the structure and the applied potential range. in the range of 1.5–3.5 v, li+-ions can be reversibly intercalated into the α-moo3 nanobelts. utilizing the material in this way as intercalation cathode material yields an initial discharge capacity of 295 ma h g−1 at 100 ma g−1 and comparably moderate capacity fading of 25% between cycles 20 and 100. extending the potential range to 0.01–3.0 v induces the conversion reaction to mo, which for both modifications yields high initial capacities of around 1500 ma h g−1 but is associated with much stronger capacity fading.
آدرس Heidelberg University, Germany. Russian Academy of Sciences, Ural Division, Russia, Heidelberg University, Germany, Heidelberg University, Germany, West Pomeranian University of Technology, Poland, Heidelberg University, Germany
 
     
   
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