Pressure in charge. Neglected parameter in hydrothermal synthesis turns out to be crucial for electrochemical properties of ammonium vanadates. (10th April 2020)

• Record Type: Journal Article
• Authors: Prześniak-Welenc, Marta; Nadolska, Małgorzata; Nowak, Andrzej P.; Sadowska, Kamila
• Is Part Of: Electrochimica acta. Volume 339(2020)
• Publication Date: 2020-04-10
• Subjects: Ammonium vanadate -- Solvothermal method -- Electrochemical characterization -- Li-ion battery; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2020.135919
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: Ammonium vanadates are of great interest as they exhibit unusual electrical and sensory properties. (NH4 )2 V6 O16 and (NH4 )2 V10 O25 ·8H2 O with various morphology were obtained in the hydrothermal synthesis under controlled temperature and pressure. It was shown, that the pure (NH4 )2 V10 O25 ·8H2 O was obtained under 50 bar of initial pressure, whereas lower pressure lead to the mixture of two compounds. The influence of the pressure was studied for the first time, and the results demonstrated its utmost importance. Moreover, the electrochemical performance of synthesized (NH4 )2 V10 O25 ·8H2 O was studied, revealing its excellent behavior as cathode material for Li-ion batteries. To the best of our knowledge, there is no information available on using this structure in such application.