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A method for one-step preparation of ag-loaded birnessite manganese dioxide by electrodeposition

A technology of birnessite and electrodeposition method, which is applied in the direction of nanotechnology, electrolytic components, electrolytic process, etc. for materials and surface science, can solve the problems of increasing the difficulty of electrode preparation, and achieve enhanced conductivity and electrochemical performance. increased effect

Active Publication Date: 2021-06-15
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the metal-loaded manganese dioxide prepared by the existing method is in a powder state, and when used as a specific capacitance, an electrode with an adhesive needs to be prepared, which increases the difficulty of preparing the electrode, and provides a A method for preparing Ag-loaded birnessite manganese dioxide in one step by electrodeposition

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  • A method for one-step preparation of ag-loaded birnessite manganese dioxide by electrodeposition
  • A method for one-step preparation of ag-loaded birnessite manganese dioxide by electrodeposition
  • A method for one-step preparation of ag-loaded birnessite manganese dioxide by electrodeposition

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specific Embodiment approach 1

[0035] Specific embodiment one: this embodiment is a kind of method that utilizes electrodeposition method to prepare Ag-loaded birnessite manganese dioxide in one step and is completed according to the following steps:

[0036] 1. Pretreatment of carbon cloth:

[0037] First immerse the carbon cloth in acetone for ultrasonic cleaning, then immerse it in absolute ethanol for ultrasonic cleaning, and finally immerse it in deionized water for ultrasonic cleaning, and get a smooth carbon cloth after taking it out;

[0038] 2. Activation treatment of carbon cloth:

[0039] Immerse the clean carbon cloth in the mixed acid solution to obtain activated carbon cloth, and cut the activated carbon cloth to obtain multiple carbon cloths with a size of 1cm×1cm;

[0040] 3. Isothermal Electrodeposition of Birnessite MnO Supported by Ag Nanoparticles 2 :

[0041] ①. Preparation of electrolyte:

[0042] MnSO 4 , (NH 4 ) 2 SO 4 、CH 3 COONa and AgNO 3 Dissolved in deionized water to ...

specific Embodiment approach 2

[0049] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the ultrasonic power in Step 1 is 100W-200W. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0050] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the size of the carbon cloth described in step 1 is 2cm×10cm. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a method for preparing Ag-loaded birnessite manganese dioxide in one step by using an electrodeposition method, which relates to a method for preparing manganese dioxide. The purpose of the present invention is to solve the problem that the metal-loaded manganese dioxide prepared by the existing method is in a powder state, and when used as a specific capacitor, an electrode with an adhesive needs to be prepared, which increases the difficulty of electrode preparation. Methods: 1. Pretreatment of carbon cloth; 2. Activation treatment of carbon cloth; 3. Constant temperature electrodeposition of birnessite MnO loaded with Ag nanoparticles 2 . The present invention uses a one-step electrodeposition method to prepare birnessite MnO supported by Ag nanoparticles 2 , making MnO 2 The electrical conductivity of the birnessite MnO is greatly enhanced, so that the birnessite MnO 2 increase in electrochemical performance. The present invention can obtain the birnessite MnO supported by Ag nanoparticles 2 .

Description

technical field [0001] The invention relates to a method for preparing manganese dioxide. Background technique [0002] In modern society, lithium-ion batteries and supercapacitors are the fastest-growing clean energy sources. Lithium-ion batteries are known to deliver more energy, while supercapacitors deliver energy faster. MnO 2 (Theoretical specific capacity is 1380F / g) As a material with ultra-high specific capacitance, it has been widely used in the field of energy storage. But due to MnO 2 The poor conductivity of the MnO 2 The introduction of highly conductive substances can effectively increase the MnO 2 charge transport ability and increase its capacitive performance. Metal loading on MnO 2 It will greatly improve its capacitive performance, but the currently prepared metal-loaded birnessite-type manganese dioxide is in powder state, which requires the preparation of electrodes with adhesives (PVDF or PTFE), complicated manufacturing The slurry process incr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/21C25C1/20B82Y30/00
CPCB82Y30/00C25B1/21C25C1/20
Inventor 姜兆华张志荣姚忠平
Owner HARBIN INST OF TECH