A kind of preparation method of double metal nano hydroxide and oxide compound
A bimetallic nano, hydroxide technology, applied in nanotechnology, nanotechnology, hybrid/electric double layer capacitor manufacturing and other directions, can solve the problems of difficulty in the preparation of metal oxide and metal hydroxide composite materials, and achieve improved capacitance. performance, availability of raw materials, and the effect of increasing specific surface area
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Embodiment 1
[0040] A method for preparing a bimetallic nanohydroxide and an oxide compound based on a metal-organic framework, comprising the following steps:
[0041] (1) Preparation of metal-organic framework (ZIF-67): Weigh cobalt nitrate and 2-methylimidazole and dissolve them in 250 mL of organic solvent methanol according to the molar ratio of 1:4, in which 1mol of cobalt nitrate and 2-methylimidazole 4mol, stir to mix evenly, stand at room temperature for 24h, filter the above reaction solution, wash the precipitate with mother liquor, and dry at 70°C to obtain the required crystalline material metal-organic framework ZIF-67;
[0042] (2) Preparation of double metal hydroxide coated ZIF-67: Weigh 80mg ZIF-67 and disperse it in 128mgNi(NO 3 ) 2 anhydrous ethanol solution, vigorously stirred for 30min, the stirring rate was 500r / min, and centrifuged to obtain ZIF-67-LDH;
[0043] (3)α-Co / Ni(OH) 2 @Co 3 o 4 The preparation of -70: the ZIF-67 of step (2) gained double metal hydrox...
Embodiment 2
[0046] (1) The preparation of ZIF-67 metal-organic framework is the same as that in Example 1.
[0047] (2) The preparation of ZIF-67-LDH is the same as in Example 1.
[0048] Step (2) gained product need not carry out step (3) NaH 2 PO 2 The etching process is directly used to prepare electrodes.
[0049] The preparation of the active material electrode is the same as in Example 1.
Embodiment 3
[0051] (1) The preparation of ZIF-67 metal-organic framework is the same as that in Example 1.
[0052] (2) The preparation of ZIF-67-LDH is the same as in Example 1.
[0053] (3)α-Co / Ni(OH) 2 Preparation: The product obtained in step (2) was added with 64 μL of H 3 PO 2 and 32 mg NaH 2 PO 2 The distilled aqueous solution was stirred for 1 hour and reacted at 70°C for 15 hours. The obtained precipitate was centrifuged, washed with deionized water and absolute ethanol three times, and dried at 70°C for 12 hours to obtain the target product.
[0054] The preparation of the active material electrode is the same as in Example 1.
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