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Membrane electrode activation method for SPE electrolytic cell, application and electrolytic cell structure

An activation method and electrolytic cell technology, applied in the field of membrane electrode activation method for SPE electrolytic cells and its SPE electrolytic cell structure, can solve problems such as insufficient research

Pending Publication Date: 2021-05-18
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current research on membrane electrode activation methods for SPE electrolyzers is insufficient, and it is urgent to propose a method for membrane electrode activation.

Method used

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  • Membrane electrode activation method for SPE electrolytic cell, application and electrolytic cell structure
  • Membrane electrode activation method for SPE electrolytic cell, application and electrolytic cell structure
  • Membrane electrode activation method for SPE electrolytic cell, application and electrolytic cell structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] As shown in Figure 1, a kind of SPE electrolyzer structure that the present invention provides, comprises insulation panel, flow field plate, titanium net, membrane electrode, carbon paper and externally connected load power supply, water supply device and voltage, current reading meter, Among them: two insulating panels are arranged oppositely, two flow field plates are arranged relatively between the two insulating panels, titanium mesh and carbon paper are arranged relatively between the two flow field plates, and membrane electrodes are arranged on the Between the titanium mesh and the carbon paper; the connected load power supply provides activation current for the SPE electrolyzer; the connected water supply device feeds deionized water with controllable temperature and flow rate into the anode side of the SPE electrolyzer; the connected voltage and current The reading meter is used to read the value of the load voltage and current of the SPE electrolyzer.

[0039...

Embodiment 2

[0044] The deionized water is passed into the anode side of the SPE electrolytic cell. Before the load current or voltage is applied, the SPE membrane needs to be pre-wetted. The temperature of the deionized water is 80°C, the flow rate is 20ml / min, and the pre-wet time is 2h, the full wetting of the SPE membrane was obtained.

[0045] Subsequently, an initial current density was applied to the SPE electrolyzer set to 0A cm -2 , the load current density increased to 3A cm through 10 stages -2, each stage maintains constant current operation for 20 minutes, and then passes through 10 stages from 3A cm -2 Decrease to 0Acm -2 , the number of stages of decreasing current density is the same as the number of stages of increasing current density, the value of increasing or decreasing current density is the same, and the running time is the same; in addition, at the same time, the anode side is continuously fed with deionized water with a water temperature of 80 °C and a flow rate ...

Embodiment 3

[0047] Deionized water is introduced into the anode side of the SPE electrolytic cell. Before applying the load current or voltage, the SPE membrane needs to be pre-wetted. The temperature of the deionized water is 70°C, the flow rate is 10ml / min, and the pre-wet time is 3h, the full wetting of the SPE membrane was obtained.

[0048] Then apply a load constant voltage of 2V to the SPE electrolyzer, and at the same time continue to feed deionized water with a water temperature of 70°C and a flow rate of 30ml / min on the anode side. After 12 hours, the current of the SPE electrolyzer maintains a change of ±0.002A, indicating that the activation is complete. Figure 4 Cyclic voltammetry schematics show a large increase in active sites after activation compared to unactivated.

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Abstract

The invention relates to a membrane electrode activation method for an SPE electrolytic bath. The membrane electrode activation is that a membrane electrode is assembled in an SPE electrolytic bath for activation, wherein a load power supply is adopted to provide activation current for the SPE electrolytic cell, deionized water with controllable temperature and flow velocity is introduced into the anode side of the SPE electrolytic bath by adopting a water supply device, a voltage reading meter and a current reading meter are used for reading values of load voltage and current of the SPE electrolytic bath, pre-wetting treatment is carried out in membrane electrode activation, and before load current or voltage is applied, deionized water is introduced into the anode side of the SPE electrolytic bath for full wetting of an SPE membrane. The invention further discloses application of the method in hydrogen production of an SPE electrolytic bath device and an SPE electrolytic bath structure. According to the invention, a proton, electron, water and gas substance transmission channel is effectively and quickly constructed on a membrane electrode, so that ohmic impedance and substance transmission impedance are greatly reduced; and the membrane electrode activation method provided by the invention can be applied to an SPE electrolytic bath with low cost, high activity and long service life.

Description

technical field [0001] The invention belongs to the technical field of hydrogen production by electrolyzing water, and relates to a membrane electrode activation method for an SPE electrolyzer and a structure of the SPE electrolyzer. Background technique [0002] Hydrogen energy is a clean, efficient, and renewable energy. Using hydrogen energy to replace fossil energy is considered to be an effective way to solve the current energy shortage and environmental pollution problems facing the world. Electrolyzed water is one of the most effective technologies for producing high-purity hydrogen, especially when combined with renewable energy power generation technology, it can not only effectively absorb "abandoned electricity" and is economical, but also realizes a cleaner way of hydrogen production, which has broad potential Application prospect. [0003] The solid polymer electrolyte (Solid Polymer Electrolyze, SPE) electrolyzer has the advantages of small size, compact struc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B15/00C25B9/23C25B1/04C25B11/02
CPCC25B15/00C25B11/02Y02E60/36
Inventor 吕洪王森张存满周伟
Owner TONGJI UNIV
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