Preparation method of layered cobalt aluminium bihydroxy composite metal oxide electrode material

A technology of bis-hydroxyl compound and electrode material, applied in electrode manufacturing, hybrid capacitor electrode, capacitor manufacturing, etc., can solve the problems of underutilization of active substances, agglomeration between particles, insufficient crystal form, etc., and achieve electrochemical cycle. Good performance, good rate characteristics, uniform particle size

Inactive Publication Date: 2006-03-29
BEIJING UNIV OF CHEM TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this preparation method is complicated, and the specific capacitance of the product is low, and the active material has not been fully utilized.
[0006] In Document (2) Power Supply Technology, 2003, 27(3): 315, Liu Xianming et al. considered using doped Al to improve the electrochemical performance of electroactive materials, and prepared a layered cobalt-aluminum bilayer by chemical co-precipitation method. Hydroxide Co 0.67 Al 0.33 (CO 3 ) 0.165 (OH) 2 ·nH 2 O, single electrode mass specific capacitance up to 400F·g -1 , but the crystal form of the sample p

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  • Preparation method of layered cobalt aluminium bihydroxy composite metal oxide electrode material
  • Preparation method of layered cobalt aluminium bihydroxy composite metal oxide electrode material
  • Preparation method of layered cobalt aluminium bihydroxy composite metal oxide electrode material

Examples

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[0026] Example 1:

[0027] Take 0.10mol Co(NO 3 ) 2 And 0.05mol of Al(NO 3 ) 3 Dissolve in 150ml of deionized water to form a mixed salt solution, take 0.20mol of NaOH and 0.10mol of Na 2 CO 3Dissolve in 150ml of deionized water to form an alkali solution; add the mixed salt solution and alkali solution into the fully backmixed liquid membrane reactor at the same speed at the same time, and mix thoroughly at the gap between the rotor and the stator after being dispersed by the liquid distributor , Discharged from the discharge port, controlled the rotor speed to 4000rpm, the reaction temperature was 25℃, and the residence time of the materials in the reactor was 2min; put the slurry discharged from the fully backmixed liquid membrane reactor into a round bottom flask at 80℃ Stir and crystallize under the water bath for 10h; wash and filter the crystallized material with deionized water for several times until the pH value is less than 8, and then vacuum dry at 80℃ for 5h; the drie...

Example Embodiment

[0028] Example 2:

[0029] Take 0.20mol of CoSO 4 And 0.025mol of Al 2 (SO 4 ) 3 Dissolve in 150ml of deionized water to form a mixed salt solution, take 0.20mol NaOH and 0.10mol Na 2 CO 3 Dissolve in 150ml of deionized water to form an alkali solution; add the mixed salt solution and alkali solution into the fully backmixed liquid membrane reactor at the same speed at the same time, and mix thoroughly at the gap between the rotor and the stator after being dispersed by the liquid distributor , Discharge from the discharge port, control the rotor speed to 3500rmp, the reaction temperature to 35℃, the residence time of the materials in the reactor is 1min; put the slurry discharged from the fully backmixed liquid membrane reactor into a round bottom flask at 65℃ Stir and crystallize under the water bath for 15h; wash and filter the crystallized material with deionized water several times until the pH value is less than 8, and then vacuum dry at 70℃ for 5h; the dried material at 2℃·...

Example Embodiment

[0030] Example 3:

[0031] Take 0.15mol of CoCl 2 And 0.05mol of AlCl 3 Dissolve in 150ml of deionized water to form a mixed salt solution, take 0.15mol NaOH and 0.10mol Na 2 CO 3 Dissolve in 150ml of deionized water to form an alkali solution; add the mixed salt solution and alkali solution into the fully backmixed liquid membrane reactor at the same speed at the same time, and mix thoroughly at the gap between the rotor and the stator after being dispersed by the liquid distributor , Discharged from the discharge port, controlled the rotor speed to 5000rpm, the reaction temperature was 25℃, and the residence time of the materials in the reactor was 3min; put the slurry discharged from the fully backmixed liquid membrane reactor into a round bottom flask at 70℃ Stir and crystallize under the water bath for 15h; wash and filter the crystallized material with deionized water several times until the pH value is less than 8, then vacuum dry at 80℃ for 10h; the dried material at 5℃·mi...

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Abstract

The invention relates to a method for preparing a sandwich Co-Al-hydroxide composite metal oxide (Co-Al-LDH) electrode material of super capacitor, belonging to the technical field of preparing the electrode material of super capacitor. The invention uses an all-returning mixed solution film reactor to make coprecipitation reaction on Co-Al mixed salt solution and basic solution, making nucleation/crystallization separation, controlling the nucleating and growing conditions of the crystal, respectively, then baking at a certain temperature, and fully exposing the electrochemical active situ of the Co on the basis of keeping the sandwich of Co-Al-LDH. The prepared Co-Al-LDH has the advantages of high specific capacitance, good multiplication property, and excellent electrochemical circulating performance.

Description

technical field [0001] The invention relates to a method for preparing a layered structure cobalt-aluminum double-hydroxy composite metal oxide supercapacitor electrode material, which belongs to the technical field of supercapacitor electrode material preparation. Background technique [0002] Supercapacitors have the advantages of high energy density of secondary batteries and high power density of conventional physical (or electrolytic) capacitors. In addition, they are environmentally friendly, wide operating temperature range, and long cycle life. New energy storage devices have broad application prospects in electric vehicles, mobile communications, aerospace, national defense technology and new energy development. Electrode materials are an important part of supercapacitors and a key factor affecting the performance and production cost of supercapacitors. Therefore, the research and development of high-performance and low-cost electrode materials is an important part ...

Claims

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Application Information

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IPC IPC(8): H01G9/04H01G13/00H01M4/04H01M14/00H01G11/46
CPCY02E60/13H01G9/155H01G9/058H01G11/46H01G11/22
Inventor 段雪杨文胜王毅
Owner BEIJING UNIV OF CHEM TECH
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