Serrated layered oxide material and preparation method and use thereof
A zigzag, structural layer technology, applied in the field of materials, can solve the problems of poor air stability and difficult industrialization of the process, and achieve the effects of high abundance, low manufacturing cost, and reduced material cost
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Embodiment 1
[0039] An embodiment of the present invention provides a layered oxide material with a zigzag structure, the general chemical formula of which is: NaCu x Ti y mn 1-x-y o 2 ; wherein 0<x≤0.2, 0≤y≤0.2; the space group of the zigzag structure layered oxide material is Pmnm. In the layered oxide materials with zigzag structure, Cu, Ti, and Mn are transition metal atoms, and the transition metal atoms and oxygen atoms form polyhedrons; in the layered oxide materials with zigzag structure, Na atoms and polyhedrons respectively form Arranged in a sequence of overlapping Na atomic layers and polyhedral layers, and in the Na atomic layer, Na atoms are in a zigzag arrangement structure, and in the polyhedron layer, the polyhedrons are in a zigzag arrangement structure.
[0040] exist figure 1 Three zigzag structure layered oxide materials NaCu are given in 0.05 mn 0.95 o 2 、NaCu 0.1 mn 0.9 o 2 、NaCu 0.2 mn 0.8 o 2 The X-ray diffraction (X-ray diffraction, XRD) pattern, can ...
Embodiment 2
[0044] This embodiment provides a method for preparing a layered oxide material with a zigzag structure, specifically a solid phase method, such as image 3 shown, including:
[0045] Step 301, mixing sodium carbonate with a stoichiometric amount of required sodium of 100wt% to 108wt% and required stoichiometric amounts of copper oxide, titanium dioxide and manganese oxide in proportion to form a precursor;
[0046] Step 302, using a ball milling method to uniformly mix the precursor to obtain a precursor powder;
[0047] Step 303, placing the precursor powder in a muffle furnace, and heat-treating it in an air atmosphere at 800° C. to 1050° C. for 2 to 24 hours;
[0048] Step 304, grinding the heat-treated precursor powder to obtain a layered oxide material with a zigzag structure.
[0049] The preparation method of the zigzag structure layered oxide material provided in this embodiment can be used to prepare the zigzag structure layered oxide material described in the abov...
Embodiment 3
[0051] In this example, the solid-phase method described in the previous example 2 was used to prepare the zigzag structure layered oxide material, including:
[0052] Na 2 CO 3 (analytical pure), CuO, Mn 2 o 3 Mix according to the required stoichiometric ratio; grind in an agate mortar for half an hour to obtain the precursor; press the precursor and transfer it to Al 2 o 3 In the crucible, treat it in a muffle furnace at 950°C for 12 hours to obtain a black powder with a zigzag structure layered oxide material NaCu 0.05 mn 0.95 o 2 (XRD pattern see figure 1 ). Figure 4 for NaCu 0.05 mn 0.95 o 2 It can be seen from the scanning electron microscope (SEM) image that the particle shape of the material is rod-shaped, and the size distribution is mainly from 1 micron to 6 microns.
[0053] The zigzag structure layered oxide material prepared above is used as the active material of the positive electrode material of the battery for the preparation of the sodium ion bat...
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Abstract
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