Preparation method of Ti-Mn porous anode material for electrolysis of manganese dioxide

A technology of electrolytic manganese dioxide and porous anode, which is applied in electrode coatings, electrodes, electrolytic components, etc., can solve the problem that the mechanical properties of manganese permeated titanium plates are greatly affected, the preparation cost of manganese permeated titanium plate anodes is high, and the composition of Ti-Mn is inconsistent. stability and other issues, to achieve good anti-passivation ability, good anode electrocatalytic activity, and rich pores.

Pending Publication Date: 2021-03-16
GUANGXI GUILIU CHEM CO LTD +2
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] However, the current manganese-infiltrated titanium plate still has obvious application disadvantages: (1) The complexity of the manganese-infiltrated titanium plate leads to unstable composition of Ti-Mn on the surface of the manganese-infiltrated titanium plate, which affects the stability of the anode reaction; (2) Manganese-infiltrated titanium plate The mechanical properties are greatly affected by the surface Ti-Mn composition, which is prone to lateral or longitudinal deformation, causing short circuit between cathode and anode; (3) Manganese-infiltrated titanium plate anode preparation cost is high

Method used

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  • Preparation method of Ti-Mn porous anode material for electrolysis of manganese dioxide
  • Preparation method of Ti-Mn porous anode material for electrolysis of manganese dioxide
  • Preparation method of Ti-Mn porous anode material for electrolysis of manganese dioxide

Examples

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Embodiment 1

[0025] Example 1: 100g Ti powder (-400 mesh, purity>99.8 wt.%) and 130g electrolytic Mn powder (-400 mesh, purity>99.8 wt.%) were mixed for 24 hours under nitrogen protection, and 8.0g glycerin was taken Mix with 80mL ethanol, then fully mix Ti / Mn mixed powder with glycerin / ethanol mixed solution to granulate; take the granulated Ti / Mn mixed powder and press to form, the pressure is 120 MPa, and the preform thickness is 4.2mm. Place the preform in a vacuum sintering furnace, raise the temperature to 350°C at a rate of 3°C / min, and then hold it for 3 hours, then raise the temperature to 500°C at a rate of 3°C / min and hold it for 2 hours to ensure the stable decomposition of the polymer binder; Subsequently, the temperature was raised to 1100 °C at a rate of 2 °C / min for 3.5 hours, and the cooling period was set at 1000 °C for 3 hours to obtain a Ti-Mn metal porous anode material. The average pore diameter is 22.5μm, the open porosity is 41.0%, and the bending strength is 48MPa....

Embodiment 2

[0027] Example 2: 100g Ti powder (-400 mesh, purity>99.8 wt.%) and 130g electrolytic Mn powder (-400 mesh, purity>99.8 wt.%) were mixed for 24 hours under nitrogen protection, and 8.0g glycerin was taken Mix with 80mL of ethanol, then fully mix the Ti / Mn mixed powder with glycerin / ethanol mixed solution to granulate; take the granulated Ti / Mn mixed powder and press to form, the pressure is 150 MPa, and the thickness of the preform is 3.9mm. Place the preform in a vacuum sintering furnace, raise the temperature to 350°C at a rate of 3°C / min, and then hold it for 4 hours, then raise the temperature to 500°C at a rate of 3°C / min and hold it for 3 hours to ensure the stable decomposition of the polymer binder; Subsequently, the temperature was raised to 1100 °C at a rate of 2 °C / min for 3.5 hours, and the cooling period was set at 1000 °C for 3 hours to obtain a Ti-Mn metal porous anode material. The average pore diameter is 18.7μm, the open porosity is 39.8%, and the bending stre...

Embodiment 3

[0028]Example 3: 100g Ti powder (-400 mesh, purity>99.8 wt.%) and 130g electrolytic Mn powder (-400 mesh, purity>99.8 wt.%) were mixed for 24 hours under nitrogen protection, and 8.0g glycerin was taken Mix with 80mL ethanol, then fully mix the Ti / Mn mixed powder and glycerin / ethanol mixed solution to granulate; take the granulated Ti / Mn mixed powder and press to form, the pressure is 200 MPa, and the thickness of the preform is 3.5mm. Place the preform in a vacuum sintering furnace, raise the temperature to 350°C at a rate of 3°C / min, and then hold it for 4.5 hours, then raise the temperature to 500°C at a rate of 3°C / min and hold it for 3.5 hours to ensure the stable decomposition of the polymer binder; Subsequently, the temperature was raised to 1100 °C at a rate of 2 °C / min for 3.5 hours, and the cooling period was set at 1000 °C for 3 hours to obtain a Ti-Mn metal porous anode material. The average pore diameter is 15.5μm, the open porosity is 37.0%, and the bending stren...

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Abstract

The invention relates to a preparation method of a Ti-Mn porous anode material for electrolysis of manganese dioxide. The preparation method comprises the following steps of: (1) fully mixing Ti powder and electrolytic Mn powder, and granulating the mixed powder; (2) carrying out die pressing forming on the granulated Ti/Mn mixed powder under a certain pressure; and (3) sintering the Ti/Mn preformed blank formed by pressing in a vacuum sintering furnace to finish the reaction synthesis and partial diffusion pore-forming process of the element mixed powder, thereby obtaining the intermetallic compound Ti-Mn porous material which is used for an anode for wet electrolysis of manganese dioxide. The preparation method is simple in technological process, technological parameters are easy to control, the obtained metal porous material has a good anode electro-catalysis effect, an excellent anode passivation resisting effect, excellent mechanical performance and a stable porous structure, andthe production period of electrolytic manganese dioxide is greatly prolonged.

Description

technical field [0001] The invention relates to a preparation method of a Ti-Mn metal porous anode material, in particular to a preparation method of a Ti-Mn metal porous anode material oriented to the production and application of wet electrolytic manganese dioxide. Background technique [0002] In the process of wet electrolysis of manganese dioxide, the electrolyte is H 2 SO 4 and MnSO 4 The mixed solution of the mixed solution, often using the surface sandblasted pure titanium plate as the anode, copper plate or graphite as the cathode, through direct current electrolysis, the Mn in the electrolyte 2+ Ions are oxidized to γ-MnO 2 deposited on the anode surface. [0003] In addition to pure titanium plates as anodes, there are also manganese-infiltrated titanium plates used as anodes in production. TiMn intermetallic compounds with a certain crystal structure are formed on the surface of manganese-infiltrated titanium plates. Under the same electrolysis conditions, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/21C25B11/031C25B11/046B22F3/11C22C1/08C22C22/00
CPCC25B1/21C25B11/04B22F3/1143C22C22/00
Inventor 覃胜先吴元花许雄新喻林萍李擎沈玮俊
Owner GUANGXI GUILIU CHEM CO LTD
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