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Catalytic slurry, membrane electrode and preparation method and application thereof

A membrane electrode and catalytic slurry technology, applied in battery electrodes, circuits, fuel cells, etc., can solve the problems of no reduction in current density and durability, swelling and deformation of proton exchange membranes, low performance of membrane electrodes, etc., and achieve batch consistency Good, improved utilization, high power density

Active Publication Date: 2020-05-08
FAW JIEFANG AUTOMOTIVE CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main difficulties of this process are: (1) how to use the existing mature commercial catalyst to control the lower Pt loading without reducing the current density and durability; (2) how to solve the problem of spraying the cathode (or anode) ) catalyst, when the anode (or cathode) catalyst is coated on the other side, the proton exchange membrane will swell and deform, and the performance of the prepared membrane electrode is low, the difference is large, and the production efficiency is low.

Method used

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  • Catalytic slurry, membrane electrode and preparation method and application thereof
  • Catalytic slurry, membrane electrode and preparation method and application thereof
  • Catalytic slurry, membrane electrode and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0093] The present embodiment provides a kind of preparation method of catalytic slurry:

[0094] (1) Preparation of component A:

[0095] a. In the stirring tank, add commercialized Pt / C catalyst (the massfraction of Pt in the Pt / C catalyst is 60%) 0.12g, and add 1g deionized water stabilizer, the commercialized Pt / C catalyst is all moistened Wet and ultrasonically mix for 10 minutes;

[0096] b. Add 44g ethanol and 55g isopropanol mixed solvent, mix and stir for 18min;

[0097] c. Add 1.2 g of binder (5% Nafion resin solution), stir for 45 minutes with a high-speed emulsifying shear, and pass compressed air with a small flow rate above the liquid to obtain component A.

[0098] (2) Preparation of component B:

[0099] a. In the stirring tank, add commercialization Pt-Co / C catalyst (the mass percentage composition of Pt is 48% in the Pt-Co / C catalyst, the mass percentage composition of Co is 3%) 0.5g, and add 0.5 g deionized water stabilizer to fully wet the commercial Pt...

Embodiment 2

[0145] The present embodiment provides a kind of preparation method of catalytic slurry:

[0146] (1) Preparation of component A:

[0147] a. In the stirring tank, add commercialized Pt / C catalyst (the mass fraction of Pt in the Pt / C catalyst is 70%) 0.5g, and add 1.0g deionized water stabilizer, all commercialized Pt / C catalyst Wet and sonicate for 15 minutes;

[0148] b. Add 55g of ethanol and 38g of isopropanol mixed solvent, 1.5g of cerium oxide and mix and stir for 30min;

[0149] c. Add 1.0 g of binder (5% Nafion resin solution), stir with a high-speed emulsifying shearer for 70 minutes, and pass compressed air with a small flow rate above the liquid to obtain component A.

[0150] (2) Preparation of component B:

[0151] a. In the stirring tank, add commercialization Pt-Co / C catalyst (the mass percentage composition of Pt is 46% in the Pt-Co / C catalyst, the mass percentage composition of Co is 4%) 0.75g, and add 0.4 g deionized water stabilizer to fully wet the comm...

Embodiment 3

[0163] The present embodiment provides a kind of preparation method of catalytic slurry:

[0164] (1) Preparation of component A:

[0165] a. In the stirring tank, add commercialized Pt / C catalyst (the mass fraction of Pt in the Pt / C catalyst is 60%) 0.5g, and add 0.6g deionized water stabilizer, and commercialized Pt / C catalyst is all Wet and sonicate for 5 minutes;

[0166] b. Add 40g ethanol and 50g isopropanol mixed solvent, 1.5g rubidium oxide and mix and stir for 10min;

[0167] c. Add 0.9 g of binder (5% Nafion resin solution), stir for 45 min with a high-speed emulsifying shear, and pass a small flow of compressed air above the liquid to obtain component A.

[0168] (2) Preparation of component B:

[0169] a. In the stirring tank, add commercialized Pt-Cu / C catalyst (the mass percentage composition of Pt in the Pt-Co / C catalyst is 48%, the mass percentage composition of Co is 3%) 0.6g, and add 0.9g deionized water stabilizer wets the commercial Pt-Co / C catalyst com...

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Abstract

The invention provides catalytic slurry, a membrane electrode and a preparation method and application thereof. The catalytic slurry comprises a component A and a component B, wherein the component Ais prepared from 0.5 to 1.2 parts by weight of a catalyst, 0.6 to 1.1 parts by weight of a stabilizer, 1.5 to 2.2 parts by weight of an antipole inhibitor, 0.9 to 1.3 parts by weight of a binding agent and 90 to 99 parts by weight of a solvent; the component B is prepared from the following components in parts by weight: 0.5 to 0.7 part of a catalyst, 0.39 to 0.94 part of a stabilizer, 1.7 to 2.02parts of an antipole inhibitor, 0.75 to 2.4 parts of a binding agent, 0.8 to 1.2 parts of an activating agent and 84.7 to 99.5 parts of a solvent. According to the invention, the catalytic slurry improves the platinum utilization rate, the hydrogen proton transfer rate and the electron transfer rate, reduces activation polarization, ohmic polarization and mass transfer polarization and improves the power density of a membrane electrode through stepped concentration distribution and addition of an activator.

Description

technical field [0001] The invention belongs to the field of fuel cells and relates to a catalytic slurry, a membrane electrode and a preparation method and application thereof. Background technique [0002] The principle of proton exchange membrane fuel cell is to use hydrogen and oxygen to react to directly convert chemical energy into electrical energy. Due to its high energy conversion efficiency, fast start-up at low temperature, no pollution, good durability, and high specific power, it is considered It is one of the best green energy sources of the 20th century. The membrane electrode is the power generation center of the proton exchange membrane fuel cell, and is the main place where the electrochemical reaction occurs, completing the occurrence of the reaction, the transfer of the product, the transfer of electrons, and the transfer of energy. Its preparation process will directly determine the power density, service life and cost control of the entire battery. ...

Claims

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Application Information

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IPC IPC(8): H01M4/92H01M4/86H01M4/88H01M8/1004
CPCH01M4/926H01M4/921H01M4/8663H01M4/8668H01M8/1004H01M4/8807H01M4/8828Y02E60/50
Inventor 于力娜张克金朱雅男唐柳杨帅
Owner FAW JIEFANG AUTOMOTIVE CO
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