Simple environmentally-friendly method for synthesizing ribbon-like V3O7 crystal
A green, crystal technology, applied in electrical components, battery electrodes, circuits, etc., can solve the problem of consuming too much energy, and achieve the effect of high specific capacity, low cost and simple method
Inactive Publication Date: 2018-12-11
INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI +1
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[0003] [2] V.S.R. Channu, R. Holze, B. Rambabu, Synthesis and characterization of H2V3O8 nanorods for electrochemical devices, Curr Appl Phys 13 (2013) 237-240) 3 o 7 •H 2 O, but these methods often require the introduction of organic solvents, or require long-term high-temperature heating and consume too much energy
Ribbon V 3 o 7 Crystal related patent reports
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Embodiment 1
[0014] best practice
[0015] Accurately weigh 1.819 g (10 mmol) of vanadium pentoxide powder, slowly add it step by step into a beaker with 114.0 g of 30% hydrogen peroxide, and stir continuously with a magnetic stirrer under cold water bath conditions to form a transparent The orange solution was stirred for another 24 hours. After forming a dark orange gel, it was dried in an oven at 70° C. for 3 hours to form a brown solid. The solid is then transferred to a high-temperature cracking furnace, and in a nitrogen flow of 1.0 ml / min, it is raised from room temperature to 200°C at a rate of 15°C / min, and then from 201°C at a rate of 5°C / min. Raise to 530°C and keep for 2h. After carrying out the above gradient temperature program, take out the sample after natural cooling in the original nitrogen atmosphere, that is, V 3 o 7 crystals.
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The present invention discloses a simple environmentally-friendly method for synthesizing a ribbon-like V3O7 crystal. The preparation method comprises: slowly adding vanadium pentoxide powder to hydrogen peroxide, stirring in a cold water bath condition, drying in an oven to form a solid, transferring the solid into a reactor, carrying out gradient heating in an inert atmosphere with a certain flow rate, and naturally cooling to prepare the V3O7 crystal. According to the present invention, the V3O7 crystal can be used for lithium ion battery positive electrodes, such that the battery has highspecific capacity; and the method is simple and environmentally-friendly, is low in cost, can be used for large-scale synthesis, and is suitable for industrial production.
Description
technical field [0001] A simple and green method for synthesizing ribbon-like V3O7 crystals. Background technique [0002] my country is rich in vanadium resources, and the annual output of vanadium ranks third in the world. With the development and utilization of vanadium oxides, V 3 o 7 Applications in catalytic chemistry and materials science have gradually attracted attention. Since V 3 o 7 Contains V 5+ and V 4+ The ratio is 2:1, its theoretical specific capacity is extremely high, it is regarded as a potential anode material for lithium-ion batteries, and has broad application prospects. Therefore, V 3 o 7 The synthesis of crystals is attracting attention. Hydrothermal method has been reported [1-2] (References: [1] Y. Zhang, M. Zhou, M.Fan, C. Huang, C. Chen, Y. Cao, H. Li, X. Liu, Improvement of the electrochemical properties of V3O7•H2O nanobelts for Li battery applicationthrough synthesis of V3O7@C core-shell nanostructured composites, Curr ApplPhys 11 ...
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IPC IPC(8): H01M4/48
CPCH01M4/48Y02E60/10
Inventor 蔡澎黄晓梅杨传俊唐超章路
Owner INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI