Oxide material containing Mg, Cu and Mn and preparation method and application of oxide material

An oxide and chemical technology, applied in electrical components, battery electrodes, non-aqueous electrolyte storage batteries, etc., can solve the problems of toxicity and high compound cost, and achieve high efficiency, low manufacturing cost, and good safety performance

Active Publication Date: 2020-08-11
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Compounds of these two elements are expensive and toxic

Method used

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  • Oxide material containing Mg, Cu and Mn and preparation method and application of oxide material
  • Oxide material containing Mg, Cu and Mn and preparation method and application of oxide material
  • Oxide material containing Mg, Cu and Mn and preparation method and application of oxide material

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preparation example Construction

[0041] The embodiment of the present invention also provides a preparation method of the O3 phase layered oxide material containing Mg, Cu, and Mn at the same time, specifically a solid phase method. Its steps are as follows figure 2 shown, including:

[0042] Step 110, mixing the oxides of sodium carbonate, copper oxide, manganese dioxide, magnesium oxide and M with a required stoichiometric amount of 100wt% to 108wt% in proportion to form a precursor;

[0043] Among them, M is an element for doping and replacing the transition metal site, specifically including Fe 3+ , Zn 2+ , Ni 2+ , Li + , Al 3+ , B 3+ , Ti 4+ one or more of

[0044] Step 120, using a ball milling method to uniformly mix the precursor to obtain a precursor powder;

[0045] Step 130, placing the precursor powder in a muffle furnace, and heat-treating it in an air atmosphere at 700° C. to 1000° C. for 2 to 24 hours;

[0046] Step 140, grinding the heat-treated precursor powder to obtain an oxide m...

Embodiment 1

[0050] This embodiment provides a kind of oxide material Na containing Mg, Cu, Mn 0.9 Mg 0.08 Cu 0.22 Fe 0.3 mn 0.4 o 2 , and its preparation process is prepared by solid-phase method. Na 2 CO 3 , Fe 2 o 3 , CuO, MnO 2 , MgO were mixed according to the required stoichiometric ratio; ground for half an hour in an agate mortar to obtain a precursor; the precursor was pressed into tablets and transferred to Al 2 o 3 In the crucible, it was processed in a muffle furnace at 850° C. for 16 hours to obtain a black powder oxide material. Its XRD spectrum is as figure 1 shown.

[0051] The 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 battery.

[0052] The prepared Na 0.9 Mg 0.08 Cu 0.22 Fe 0.3 mn 0.4 o 2 , the powder is mixed with acetylene black and the binder polyvinylidene fluoride (PVDF) according to the mass ratio of 80:10:10, adding an appropriate amount of ...

Embodiment 2

[0055] This embodiment provides a kind of oxide material Na containing Mg, Cu, Mn 0.84 Mg 0.05 Cu 0.22 Fe 0.3 mn 0.43 o 2 , the preparation process is the same as that of Example 1 above, but Na 2 CO 3 , Fe 2 o 3 , CuO, MnO 2 , MgO with different stoichiometric ratios, the black powder oxide material Na 0.84 Mg 0.05 Cu 0.22 Fe 0.3 mn 0.43 o 2 XRD spectrum such as figure 1 shown.

[0056] The oxide material prepared above was used as the active material of the positive electrode material of the battery for the preparation of the sodium ion battery, and electrochemical charge and discharge tests were carried out. Its preparation process and test method are the same as in Example 1. The test voltage ranges are 2.35V~3.95V, 2.4V~3.9V, 2.4V~4V, 2.4V~4.1V, 2.4V~4.2V, 2.4V~4.3V, 2.4V~4.4V, 2.4V~4.5V V. Figure 11 Shown in the test voltage range is 2.35V ~ 3.95V, the first cycle and the second cycle charge and discharge curves. It can be seen that when the test vol...

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Abstract

The invention discloses an oxide material containing Mg, Cu and Mn and a preparation method and an application of the oxide material. The chemical general formula of the oxide material is Na(0.8+alpha)MgxCuyM(1-x-y-z)MnzO2+beta, M is an element for doping and substituting a transition metal site and specifically comprises one or more of Fe<3+>, Zn<2+>, Ni<2+>, Li<+>, Al<3+>, B<3+> and Ti<4 +>, thevalence of a transition metal element Mn in the chemical general formula is +4, alpha, x, y, z and beta are mole percentages of corresponding elements respectively, the relationship among alpha, x, y, z, and beta satisfies (0.8+alpha)+2x+2y+4z+m(1-x-y-z) =2(2+beta) and 0< = (1-x-y-z), 0.02<= alpha <=0.2, x > 0, y > 0, z > 0, -0.02 <= beta<= 0.02, m is the valence state of M, 1<= m<= 4, the oxidematerial is an O3-phase layered oxide material, and the space group is R3<->m

Description

technical field [0001] The invention relates to the technical field of lithium battery materials, in particular to an oxide material containing Mg, Cu and Mn, a preparation method and application thereof. Background technique [0002] With the reduction of non-renewable energy such as oil and coal and the aggravation of environmental pollution, the development of clean energy has become a global issue. The key to solving this problem is to develop wind energy, solar energy and the corresponding energy storage batteries. [0003] Most lithium-ion secondary batteries use lithium ion intercalation compounds as the positive and negative electrode materials, and use dry organic solvents as the electrolyte, so that lithium ions can be reversibly intercalated back and forth between the positive and negative active materials without destroying the structure of the material. . [0004] However, due to the limited lithium resources and the abundant sodium resources in recent years, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/48H01M4/485H01M4/505H01M4/58H01M4/46H01M10/052
CPCH01M4/466H01M4/48H01M4/483H01M4/485H01M4/505H01M4/5825H01M10/052Y02E60/10
Inventor 胡勇胜丁月君陆雅翔陈立泉
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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