Sulfur anion doped manganese dioxide material, preparation and application thereof, and zinc ion battery containing sulfur anion doped manganese dioxide material

A technology of zinc ion battery and manganese dioxide, which is applied in the field of electrochemical energy storage, can solve the problems of lithium ore resource shortage, price rise, flammability and safety, etc., and achieve improved zinc storage capacity, improved conductivity, and excellent energy storage performance effect

Active Publication Date: 2022-01-14
BEIJING UNIV OF CHEM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Lithium-ion battery is a relatively mature secondary battery energy storage system, but it still has flammable safety issues, and the shortage of lithium resources has caused its price to continue to rise

Method used

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  • Sulfur anion doped manganese dioxide material, preparation and application thereof, and zinc ion battery containing sulfur anion doped manganese dioxide material
  • Sulfur anion doped manganese dioxide material, preparation and application thereof, and zinc ion battery containing sulfur anion doped manganese dioxide material
  • Sulfur anion doped manganese dioxide material, preparation and application thereof, and zinc ion battery containing sulfur anion doped manganese dioxide material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] In this example, a sulfur anion-doped manganese dioxide material is prepared by the following method:

[0051] Step A: Weigh 0.6g (4mmol) KMnO 4 Dissolve 4mmol / L KMnO in 80mL deionized water 4 solution;

[0052] Step B: Configure the KMnO configured in step A 4 Move the solution into a 100mL autoclave, seal it, put it in an oven at 180°C, take it out after 2 hours of reaction, wash the reaction product 3 times with deionized water, and wash it once with absolute ethanol, put the precipitate in an oven at 60°C to dry 12h, the manganese dioxide precursor was obtained.

[0053] Step C: 13 mg (0.37 mmol) of sublimed sulfur powder was used as the sulfur source and 30 mg of the powdered MnO prepared in Step B 2 (4mmol) The precursor is placed in a quartz tube protected by an inert gas for sulfuration reaction, wherein the sublimed sulfur is placed at the gas inlet end of the quartz tube, and the MnO 2 The powder was placed at the gas outlet, and the quartz tube was heate...

Embodiment 2

[0079] In Example 2, a sulfur anion-doped manganese dioxide material was prepared by the following method: the method in Example 1 was adopted, and the only difference was that other condition parameters were changed to those shown in Table 2 below.

[0080] Table 2

[0081]

[0082] The sulfide anion-doped manganese dioxide material prepared in the above-mentioned embodiment 2 is characterized:

[0083] Figure 9 Scanning electron micrograph (SEM) of the sulfur anion-doped manganese dioxide electrode material prepared from manganese dioxide as a precursor obtained in Example 2 of the invention.

[0084] Figure 10X-ray powder diffraction pattern (XRD) under the preparation conditions for Example 2 of the present invention. The abscissa is 2θ, unit: degree; the ordinate is intensity. The curves are manganese dioxide and sulfur ion doped manganese dioxide powder.

[0085] From SEM Figure 9 It can be seen that the MnO 2 The flake structure is maintained before and aft...

Embodiment 3

[0093] In Example 3, a sulfur anion-doped manganese dioxide material was prepared by the following method:

[0094] Using the method of Example 1, the only difference is that other condition parameters are changed as shown in Table 4 below.

[0095] Table 4

[0096]

[0097] Figure 11 Scanning electron micrograph (SEM) of the sulfur anion-doped manganese dioxide electrode material prepared from manganese dioxide as a precursor obtained in Example 3 of the invention.

[0098] Figure 12 The X-ray powder diffraction pattern (XRD) under the conditions prepared for Example 3 of the present invention. The abscissa is 2θ, unit: degree; the ordinate is intensity. The curves are manganese dioxide and sulfur ion doped manganese dioxide powder.

[0099] From SEM Figure 11 It can be seen that the MnO 2 The flake structure is maintained before and after the vulcanization process, and its particle size can be measured to be about 200-500nm.

[0100] Figure 15 It is proved th...

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Abstract

The invention belongs to the technical field of electrochemical energy storage, and relates to a sulfur anion doped manganese dioxide material, preparation and application thereof, and a zinc ion battery containing the sulfur anion doped manganese dioxide material. The molecular formula of the sulfur anion doped manganese dioxide material is MnOXSY, X ranges from 1.5 to 1.7, Y ranges from 0.3 to 0.5, and the sum of X and Y is 2. The prepared sulfur anion doped manganese dioxide material, serving as a zinc ion battery positive electrode material, has excellent electrochemical performance, and the zinc storage capacity reaches 324mAh / g in the first discharge process; in the electrochemical performance testing process of the sulfur anion doped manganese dioxide material, when the scanning rate adopted by cyclic voltammetry is 0.0008 mV / s, the low-current density adopted by constant-current charge and discharge is 200mA / g, the high current density adopted by constant-current charge and discharge is 3A / g, the material shows excellent energy storage performance. Therefore, the invention provides a novel method for preparing the novel high-energy-storage-capacity electrode material of the zinc ion battery.

Description

technical field [0001] The invention belongs to the technical field of electrochemical energy storage, and in particular relates to a sulfur anion-doped manganese dioxide material, its preparation and application, and a zinc ion battery containing the same. Background technique [0002] In recent years, the development of new, high-performance and environmentally friendly energy storage technologies to meet the growing demand for energy from portable and stationary energy storage devices is a necessary condition for comprehensively promoting the implementation of the new national energy security strategy. Lithium-ion battery is a relatively mature secondary battery energy storage system, but it still has flammable safety issues, and the shortage of lithium resources has caused its price to continue to rise. In order to meet the demand for energy storage and application, and to use high-safety energy storage systems, it is very promising to develop new aqueous secondary Zn-io...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/50H01M10/38C01G45/02
CPCH01M4/50H01M10/38C01G45/02H01M2004/028C01P2004/03C01P2004/04C01P2002/72C01P2004/62Y02E60/10Y02P70/50
Inventor 刘文孙晓明赵亚军梁津瑞夏笑语
Owner BEIJING UNIV OF CHEM TECH
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