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Sheet natrium/lithium-manganese material having high specific surface area and preparation method thereof

A high specific surface area, flaky sodium technology, applied in the field of mesoporous oxide materials, can solve the problems of manganese oxide mesoporous materials, difficulty in obtaining mesoporous manganese oxide, poor repeatability, etc., and achieve excellent electrochemical performance , mild conditions and simple preparation process

Inactive Publication Date: 2007-09-19
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After this method is roasted, it is difficult to obtain crystalline mesoporous manganese oxide, and the repeatability is not good.
Due to the difficulty of manganese oxide mesoporous materials synthesized by the organic template method, there have been no related reports since then
Jia-Yan Luo (Chem.Mater.Web2006, 10.14) used KIT-6 as a template to assemble lithium manganese oxide, but the specific surface is low and the capacitance value is small

Method used

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  • Sheet natrium/lithium-manganese material having high specific surface area and preparation method thereof
  • Sheet natrium/lithium-manganese material having high specific surface area and preparation method thereof
  • Sheet natrium/lithium-manganese material having high specific surface area and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Manganese source is manganese nitrate Mn(NO 3 ) 2 ; The mesoporous hard template is silicon oxide SBA-15; after the manganese source is injected into the SBA-15 template, the template silicon is removed with sodium hydroxide. According to the formula ratio (weight ratio): 2SiO 2 -SBA15: 38.38Mn(NO 3 ) 2 :4NaOH:50H 2 O; After mixing the materials, stir them magnetically for 4 hours, assemble the manganese ions into the pores of silica SBA-15, dry them at room temperature for 10 hours, and then dry them in air at 100°C for 3 hours. The sample changes from pinkish white to brown, and manganese nitrate gradually Decompose into manganese oxide; then disperse the above powder in sodium hydroxide solution, stir magnetically for 3 hours, age for 7 hours, remove the silicon oxide template, dope excess sodium ions into manganese oxide, and finally wash several times with deionized water , filtered and finally dried in air at 100°C for 12 hours. The low and high magnificatio...

Embodiment 2

[0028] The formula ratio remains unchanged. After the raw materials are mixed and dried at room temperature according to Example 1, the manganese-silicon compound is dried in the air at 100°C for 12 hours, and then implemented according to Embodiment 1. The transmission electron micrograph of the obtained material is shown in Figure 3b, and the XRD diffraction pattern is shown in Figure 5d.

Embodiment 3

[0030] The formula ratio and other conditions remain unchanged, and after drying in air at 250°C for 12 hours, the final sample is obtained, and the XRD diffraction pattern is shown in Figure 5b.

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Abstract

The present invention relates to a flaky Na / Li-Mn material with a large specific surface area, and a preparation method of the same, which belongs to the mesoporous oxide material field. In the present invention, the flaky Na / Li-Mn material is obtained by hard template replication and has a ratio of component of 1 MnO2: (0.001~0.5)Na / Li, wherein MnO2 takes a rod shape, the aperture between each two rods is 2~5nm, the MnO2 rods having different orientation are interlaced with each other to form the flaky grains, the cumulate aperture between the flaky grains is 10~50 nm, and the flaky grains has an excellent dispersity and a high specific surface area of 80~200 m<2> / g. The flaky Na / Li-Mn material has an excellent application prospect in the fields of adsorbing material, medicine loading, catalyst material, and electrode material of lithium ion battery, sensor, electromagnetism material and environmental protection.

Description

technical field [0001] The invention relates to a flaky sodium / lithium-manganese material with a high specific surface area and a preparation method thereof, belonging to the field of mesoporous oxide materials. Background technique [0002] Energy and the environment are two severe issues that mankind must face when entering the 21st century. The development of new energy and renewable clean energy is one of the five most decisive technical fields in the world economy in the future; and with economic growth , industrial waste water and automobile exhaust are more serious to the environment, and treatment or control of pollution discharge has become a major issue to be solved urgently in global environmental protection. [0003] Since Kresge.C.T (Nature, 1992, 359, 710) reported mesoporous SiO in 1992 2 Materials and then in 1998, Zhao et al. reported that a non-ionic triblock polymer P123 (polyoxyethylene polyoxypropylene copolymer) was used to synthesize a hexagonal phase...

Claims

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Application Information

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IPC IPC(8): C01G1/02
Inventor 赵晋津陈航榕施剑林
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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