Rechargeable magnesium battery and preparation method thereof
A magnesium battery and magnesium salt technology, applied in secondary batteries, circuits, electrical components, etc., can solve the problems of harsh preparation conditions, low working platform voltage, and high cost, and achieve simple preparation methods, high energy density, and high working voltage Effect
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[0027] The method for preparing a rechargeable magnesium battery according to the second aspect of the present invention is used to prepare the rechargeable magnesium battery according to the first aspect of the present invention, comprising the steps of: (1) dissolving a transition metal salt in deionized water to form a first solution, Dissolve the cyanide salt in deionized water to form a second solution. Under magnetic stirring conditions, slowly drop the first solution into the second solution for stirring, centrifugation, and drying to obtain Prussian blue compounds with an open frame structure; 2) The positive electrode active material, positive electrode conductive agent, and positive electrode binder are added to the solvent according to a certain mass ratio, mixed and stirred to make a positive electrode slurry, and then the positive electrode slurry is evenly coated on the positive electrode current collector, and then dried, The positive electrode sheet is obtained b...
Example Embodiment
[0029] Example 1
[0030] (1) The 2.3g transition metal salt Mn(NO 3 ) 2 Dissolve in 50ml deionized water to form the first solution, add 1.42g of cyanide Na 4 Fe(CN) 6 ·10H 2 O and 14g NaCl are dissolved in 100ml deionized water to form a second solution. Under 70℃, under magnetic stirring, slowly drip the first solution into the second solution and continue to stir for 2h, then centrifuge and wash with deionized water three times A white precipitate is obtained, and then the white precipitate is dried at 120°C for 8 hours to obtain the Prussian blue compound Na with an open frame structure 2 MnFe(CN) 6 ;
[0031] (2) The positive active material Na 2 MnFe(CN) 6 , Positive electrode conductive agent Super-P, positive electrode binder PVDF (PVDF is pre-dissolved in NMP to prepare a concentration of 0.02gmL -1 The solution) is placed in a small beaker with a mass ratio of 8:1:1, and then magnetically stirred for 4 hours to obtain a uniformly mixed positive electrode slurry. Then, the...
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[0035] Example 2
[0036] A rechargeable magnesium battery was prepared according to the method of Example 1, except for the following differences:
[0037] (4) The magnesium salt is BR 3 -(PhMgCl) 2 , R represents 3,5-xylyl.
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