TWI617077B - Slurry composition with none carbon substrate and fuel cell - Google Patents

Abstract

The present invention relates to a non-carbon carrier slurry composition suitable for use in the preparation of electrodes for fuel cells and fuel cells. The non-carbon carrier slurry composition comprises a catalyst material, a Nafion solution, and an aqueous solution of isopropanol. The concentration of the Nafion solution is 2-20% by weight. The weight ratio of the catalyst material to the aqueous isopropanol solution was 3:80. The weight ratio of Nafion solution to aqueous isopropanol solution was 9:8. Among them, by adjusting the concentration of the aqueous solution of isopropyl alcohol, the dispersion effect of the non-carbon carrier slurry composition can be effectively improved, and the electrical performance of the fuel cell can be further improved.

Description

Non-carbon carrier slurry composition and fuel cell

The present application relates to a slurry composition and a fuel cell, particularly a non-carbon carrier slurry composition and a fuel cell.

With the advancement of science and technology, the rise of environmental awareness, the pursuit of more efficient energy sources has become an important direction of current development. A fuel cell is a device that converts chemical energy into electrical energy, and its energy conversion efficiency is superior, which has become an important research goal.

At present, fuel cells using carbon carrier materials are susceptible to corrosion problems. In order to solve such problems, a means of using a metal oxide as a carrier has also been developed. However, in the current application, the metal oxide carrier still has a problem of poor dispersion between the catalyst and the catalyst, and further affects the performance of the fuel cell potential and power density. Therefore, how to solve the problem of poor dispersion between the metal oxide carrier and the catalyst has become an urgent problem to be solved.

As described above, the present invention has been made to solve the present problems, and provides a non-carbon carrier slurry composition and a fuel cell.

A non-carbon carrier slurry composition disclosed in accordance with an embodiment of the present invention. The non-carbon carrier slurry composition is suitable for use in the preparation of an electrode of a fuel cell. The non-carbon carrier slurry composition comprises a catalyst material, a Nafion solution, and an aqueous solution of isopropanol. The concentration of the Nafion solution is 2-20% by weight. The weight ratio of the catalyst material to the aqueous isopropanol solution was 3:80. The weight ratio of Nafion solution to aqueous isopropanol solution was 9:8.

According to another embodiment of the present invention, a fuel cell includes a first electrode, a second electrode, a Nafion film, a two-flow field plate, and two bipolar plates. The Nafion film is interposed between the first electrode and the second electrode. The first stage field plate is connected to the first electrode, and the other flow field plate is connected to the second electrode. One bipolar plate is connected to the flow field plate, and the other bipolar plate is connected to the flow field plate. The first electrode has a first non-carbon carrier slurry composition. The first non-carbon carrier slurry composition comprises a first catalyst material, a first Nafion solution, and a first aqueous solution of isopropanol. The first catalyst material is Pt/Ti _0.5 Ru _0.5 O ₂ . The concentration of the first Nafion solution is 2-20% by weight. The weight ratio of the first catalyst material to the first aqueous solution of isopropanol was 3:80. The weight ratio of the first Nafion solution to the first aqueous solution of isopropanol was 9:8. The second electrode has a second non-carbon carrier slurry composition. The second non-carbon carrier slurry composition comprises a second catalyst material, a second Nafion solution, and a second aqueous solution of isopropanol. The second catalyst material is Pt/Ti _0.8 W _0.2 O ₂ . The concentration of the second Nafion solution is 2-20% by weight. The weight ratio of the second catalyst material to the second aqueous solution of isopropanol is 3:80. The weight ratio of the second Nafion solution to the second aqueous solution of isopropanol was 9:8.

According to the non-carbon carrier slurry composition and the fuel cell disclosed in the above embodiments of the present invention, since the non-carbon carrier slurry composition comprises a catalyst material, a Nafion solution, and an aqueous solution of isopropanol, the non-carbon carrier slurry composition has The preferred dispersibility solves the problem that the dispersion effect between the metal oxide carrier and the catalyst is currently poor. Further, since the concentration of the Nafion solution is 2 to 20% by weight and the weight ratio of the catalyst material to the aqueous solution of isopropyl alcohol is 3:80, and the weight ratio of the Nafion solution to the aqueous solution of isopropyl alcohol is 9:8. As a result, the non-carbon carrier slurry composition has a better open circuit voltage and maximum power density in the single cell test, and can effectively improve the electrical performance of the fabricated fuel cell.

The above description of the present invention and the following description of the embodiments of the present invention are intended to illustrate and explain the principles of the invention.

The detailed features and advantages of the present invention are set forth in the detailed description of the embodiments of the present invention. The objects and advantages associated with the present invention can be readily understood by those skilled in the art. The following examples are intended to describe the present invention in further detail, but do not limit the scope of the invention in any way.

In the following description, the first, second, third, etc. words used are used to distinguish different elements, components, and regions in the drawings. These words are not intended to limit elements, components, or regions. That is, the first element, the first component, and the first region described may also be the second component, the second component, and the second region, without departing from the spirit and scope of the present proposal.

A non-carbon carrier slurry composition disclosed in accordance with an embodiment of the present invention. The non-carbon carrier slurry composition is suitable for use in the preparation of an electrode of a fuel cell. In detail, the non-carbon carrier slurry composition comprises a catalyst material, a Nafion (Nafion ionomer) solution, and an aqueous solution of isopropanol. In more detail, the concentration of the Nafion solution is 2-20% by weight, and in some embodiments, the concentration of the Nafion solution is 5-10% by weight, for example 2% by weight, 5% by weight, 10% by weight or 20% by weight. In this embodiment, the solvent in the aqueous solution of isopropyl alcohol (IPA) is ultrapure water, however, the user may also select other grades of deionized water according to his needs. The weight ratio of the catalyst material to the aqueous isopropanol solution was 3:80. The weight ratio of Nafion solution to aqueous isopropanol solution was 9:8. It should also be noted that the electrode made of the non-carbon carrier slurry composition of the present invention may be the anode or the cathode of the fuel cell, and the user may make a corresponding selection according to the catalyst material, and the present invention does not Limited.

In the embodiment of the present invention, since the aqueous solution of isopropyl alcohol can improve the dispersibility of the catalyst material used, it is advantageous for the performance of the non-carbon carrier slurry composition in the single cell test. In some embodiments of the invention, the concentration of the aqueous isopropanol solution is from 10 to 20% by weight, such as 10% by weight or 20% by weight. In this way, the dispersion effect of the non-carbon carrier slurry composition can be further improved. Secondly, in the ratio of the weight ratio of the catalyst material to the Nafion solution and the weight ratio of the catalyst material to the aqueous solution of the isopropyl alcohol solution, the open circuit voltage and the maximum power of the non-carbon carrier slurry composition in the single cell test can be effectively improved. density.

In the embodiment of the present invention, the catalyst material used is a non-carbon material (non-carbonaceous catalyst), for example, Pt/Ti _0.5 Ru _0.5 O ₂ or Pt/Ti _0.8 W _0.2 O ₂ . In detail, since the present invention uses a non-carbon material as a catalyst material, problems such as corrosion of the carbonaceous catalyst can be avoided, that is, the non-carbon catalyst (Pt/Ti _0.5 Ru _0.5 O ₂ , Pt used in the present invention). /Ti _0.8 W _0.2 O ₂ ) can effectively improve the performance and service life of the fuel cell produced. Among them, Pt/Ti _0.5 Ru _0.5 O ₂ can be used for the anode of a fuel cell, and Pt/Ti _0.8 W _0.2 O ₂ can be used for a cathode of a fuel cell.

Secondly, Pt/Ti _0.5 Ru _0.5 O ₂ and Pt/Ti _0.8 W _0.2 O ₂ have excellent electrical conductivity, so that the conductivity of the fuel cell can be effectively improved.

Please refer to Table 1 below. Table 1 shows the simulation results of several anode catalysts and their conductivity. Table I

As shown in Table 1, the conductivity of Pt/Ti _0.5 Ru _0.5 O ₂ is 1.4 (S/cm), and the conductivity of Ti _0.7 Ru _0.3 O ₂ is 0.43 (S/cm), and the conductivity of Carbon XC-72. It is 1.5 (S/cm). Pt/Ti _0.5 Ru _0.5 O ₂ has significantly superior conductivity compared to Ti _0.7 Ru _0.3 O ₂ , and the conductivity of Pt/Ti _0.5 Ru _0.5 O ₂ is comparable to that of Carbon XC-72.

Please refer to Table 2 below. Table 2 shows the simulation results of several cathode catalysts and their conductivity. Table II

As shown in Table 2, the conductivity of Ti _0.8 W _0.2 O _y is 3.32 × 10 ^-1 (S/cm), the conductivity of TiO ₂ is 8.9 × 10 ^-6 (S/cm), and the conductivity of TiN _x O _y The conductivity was 5.5 × 10 ^-3 (S/cm), and the conductivity of Ti _0.9 Nb _0.1 O _y was 4.47 × 10 ^-2 (S/cm). Pt/Ti _0.8 W _0.2 O ₂ has significantly superior conductivity compared to TiO ₂ , TiN _x O _y , Ti _0.9 Nb _0.1 O _y .

In some embodiments of the present invention, the concentration of the Nafion solution is 5-10 wt% and the concentration of the aqueous isopropanol solution is 10 wt%, which optimizes the dispersion effect of the catalyst material, and thus the non-carbon carrier in the single cell test. The slurry composition achieves optimum open circuit voltage and maximum power density.

In some embodiments of the invention, the weight ratio of the catalyst material to the aqueous solution of isopropanol is substantially 3:80. The concentration of the aqueous solution of isopropanol used in the present embodiment is, for example, 10% by weight, that is, the weight ratio of the catalyst material to the isopropanol in the aqueous solution of isopropanol is substantially 3:8. In the present embodiment, the weight ratio of the catalyst material to the aqueous solution of isopropyl alcohol (and the weight ratio of the catalyst material to the isopropyl alcohol) can further optimize the dispersion effect of the catalyst material, thus in the single cell The non-carbon carrier slurry composition in the test achieves an optimum open circuit voltage and maximum power density.

In some embodiments of the invention, the weight ratio of Nafion solution to aqueous isopropanol solution is substantially 9:8. In detail, the weight ratio of the weight of Nafion in the Nafion solution to the weight of isopropyl alcohol in the aqueous solution of isopropanol is substantially 9:8-16. For example, the Nafion solution used in some embodiments of the present invention is, for example, 5 wt%, and the concentration of the aqueous isopropanol solution is, for example, 10 wt%, that is, the weight ratio of Nafion to isopropanol is substantially 9:16; The Nafion solution used in some of the examples is, for example, 10% by weight, and the concentration of the aqueous solution of isopropanol is, for example, 10% by weight, that is, the weight ratio of Nafion to isopropyl alcohol is substantially 9:8. In this embodiment, the weight ratio of the Nafion solution to the aqueous solution of isopropyl alcohol (and the weight ratio of Nafion to isopropyl alcohol) can further optimize the dispersion effect of the catalyst material, and thus in the single cell test The carbon support slurry composition achieves optimum open circuit voltage and maximum power density.

In some embodiments of the invention, the weight ratio of catalyst material to Nafion solution is 1:30. As a result, the weight ratio of the catalyst material to the Nafion solution can be optimized to further enhance the performance of the non-carbon carrier slurry composition in the single cell test.

A fuel cell made of the non-carbon carrier slurry composition of the present invention will be described below.

Please refer to FIG. 1. FIG. 1 is a schematic structural diagram of a fuel cell according to an embodiment of the present invention. As shown, the fuel cell 10 has a first electrode 100, a second electrode 200, a Nafion film 300, a two-flow field plate 400, and two bipolar plates 500. The Nafion film 300 is interposed between the first electrode 100 and the second electrode 200 to partition the first electrode 100 and the second electrode 200. The first field plate 400 is connected to the first electrode 100, and the other flow field plate 400 is connected to the second electrode 200. That is, the two-flow field plate 400 is located outside the first electrode 100 and the second electrode 200 to connect the first electrode 100 and the second electrode. The electrode 200 and the Nafion film 300 are interposed between the two flow field plates 400. One bipolar plate 500 is connected to the flow field plate 400, and the other bipolar plate 500 is connected to the flow field plate 400. That is, the two bipolar plates 500 are located outside the two flow field plate 400 to connect the first electrode 100 and the second electrode 200. The Nafion film 300 and the two-flow field plate 400 are interposed between the two bipolar plates 500. In detail, the first electrode 100 has a first non-carbon carrier slurry composition and the second electrode 200 has a second non-carbon carrier slurry composition. In this embodiment, the first non-carbon carrier slurry composition comprises a first catalyst material, a first Nafion solution, and a first aqueous solution of isopropanol. In another aspect, the second non-carbon carrier slurry composition comprises a second catalyst material, a second Nafion solution, and a second aqueous solution of isopropanol.

In the present embodiment, the first electrode 100 is an anode, and the first catalyst material of the first non-carbon carrier slurry composition of the first electrode 100 is Pt/Ti _0.5 Ru _0.5 O ₂ . On the other hand, the second electrode 200 is a cathode, and the second catalyst material of the second non-carbon carrier paste composition of the second electrode 200 is Pt/Ti _0.8 W _0.2 O ₂ .

As shown in Tables 1 and 2 above, the present invention uses Pt/Ti _0.5 Ru _0.5 O ₂ as an anode catalyst and Pt/Ti _0.8 W _0.2 O ₂ as a cathode catalyst, respectively, to have better conductivity.

In more detail, in the present embodiment, the concentration of the first Nafion solution is 2-20% by weight, for example 2% by weight, 5% by weight, 10% by weight or 20% by weight. The weight ratio of the first catalyst material to the first aqueous solution of isopropanol was 3:80. The weight ratio of the first Nafion solution to the first aqueous solution of isopropanol was 9:8. In another aspect, the concentration of the second Nafion solution is from 2 to 20% by weight, such as 2% by weight, 5% by weight, 10% by weight or 20% by weight. The weight ratio of the second catalyst material to the second aqueous solution of isopropanol is 3:80. The weight ratio of the second Nafion solution to the second aqueous solution of isopropanol was 9:8.

In some embodiments of the invention, the concentration of the first aqueous solution of isopropanol is 10-20% by weight, for example 10% by weight or 20% by weight; and the concentration of the second aqueous solution of isopropanol is 10-20% by weight, for example 10% by weight or 20wt %. In some embodiments of the invention, the concentration of the first Nafion solution is 10% by weight and the concentration of the first aqueous solution of isopropanol is 10% by weight. On the other hand, the concentration of the second Nafion solution was 5% by weight and the concentration of the second aqueous solution of isopropyl alcohol was 10% by weight. Please also note that the concentration of the first Nafion solution of this embodiment is different from the concentration of the second Nafion solution, and the concentration of the first aqueous solution of isopropanol is the same as the concentration of the second aqueous solution of isopropanol, however, the present invention Not limited to this. In other embodiments, the user may also select an appropriate concentration of the first Nafion solution, the second Nafion solution, the first aqueous isopropanol solution, and the second aqueous isopropanol solution according to their needs.

Further, in some embodiments of the present invention, the concentration of the first aqueous solution of isopropanol used is, for example, 10% by weight, that is, the first catalyst material and the first isopropanol in the first aqueous solution of isopropanol ( That is, the weight ratio of isopropanol in the first aqueous solution of isopropanol is substantially 3:8. On the other hand, the weight ratio of the second catalyst material to the second aqueous solution of isopropanol is substantially 3:80. Wherein, the concentration of the second aqueous solution of isopropanol used in the present embodiment is, for example, 10% by weight, that is, the second isopropanol in the second catalyst material and the second aqueous solution of isopropanol (that is, the second isopropanol) The weight ratio of isopropanol in the aqueous alcohol solution is substantially 3:8. Please note that the weight ratio of the first catalyst material to the first aqueous solution of isopropyl alcohol (the weight ratio of the first catalyst material to the first isopropyl alcohol) and the second catalyst material and the second difference in this embodiment The weight ratio of the aqueous solution of the propanol (the weight ratio of the second catalyst material to the second isopropyl alcohol) is the same, but the invention is not limited thereto. In other embodiments, the weight ratio of the first catalyst material to the first aqueous solution of isopropanol may also be greater or less than the weight ratio of the second catalyst material to the second aqueous solution of isopropanol.

Further, in some embodiments of the present invention, the weight ratio of the weight of the first Nafion in the first Nafion solution to the weight of the first isopropanol in the first aqueous solution of isopropanol is substantially 9:8, and the second The weight ratio of the weight of the second Nafion in the Nafion solution to the weight of the second isopropanol in the second aqueous solution of isopropanol is substantially 9:16. For example, the first Nafion solution used is, for example, 10% by weight, and the concentration of the first aqueous solution of isopropanol is, for example, 10% by weight, that is, the first Nafion (ie, Nafion in the first Nafion solution) and the first The weight ratio of isopropyl alcohol is substantially 9:8. On the other hand, the second Nafion solution used is, for example, 5 wt%, and the concentration of the second aqueous isopropanol solution is, for example, 10 wt%, that is, the second Nafion (i.e., Nafion in the second Nafion solution) and the second. The weight ratio of isopropyl alcohol is substantially 9:16. Please note that the weight ratio of the first Nafion solution to the first aqueous solution of isopropanol (the weight ratio of the first Nafion to the first isopropanol) in this embodiment is greater than that of the second Nafion solution and the second aqueous solution of isopropanol. The weight ratio (the weight ratio of the second Nafion to the second isopropyl alcohol), but the invention is not limited thereto. In other embodiments, the weight ratio of the first Nafion solution to the first aqueous solution of isopropanol may also be equal to or less than the weight ratio of the second Nafion solution to the second aqueous solution of isopropanol.

Further, in some embodiments of the invention, the weight ratio of the first catalyst material to the first Nafion solution is 1:30, and the weight ratio of the second catalyst material to the second Nafion solution is 1:30.

Hereinafter, the composition of the non-carbon carrier slurry composition of the present invention can be best demonstrated by the first to third embodiments.

Experimental Example 1: A non-carbon carrier slurry composition having different concentrations of an isopropanol solution and a single cell test were prepared, wherein the catalyst material used in this experimental example was Pt/Ti _0.5 Ru _0.5 O ₂ .

First, a Pt/Ti _0.5 Ru _0.5 O ₂ , a 5 wt% Nafion solution, and an aqueous isopropanol solution (isopropyl alcohol and ultrapure water) were mixed. Specifically, the Pt/Ti _0.5 Ru _0. 5O _{2 used} was 3.75 mg (mg), the 5 wt% Nafion solution was 112.5 mg, and the isopropyl alcohol aqueous solution was 100 mg. Here, the concentrations of the aqueous isopropanol solution used were 0 wt%, 10 wt%, and 20 wt%, respectively. Please refer to Table 3 below for the composition of each component. Among them, Table 3 lists the weight of each component and the weight ratio of each component to the total composition. Table 3

Next, the above mixture was stirred with a magnet for about 4 hours to uniformly mix and disperse the mixture to form a non-carbon carrier slurry composition. Next, the obtained non-carbon carrier slurry composition was applied to a carbon cloth having a microvoid gas phase layer to complete electrode preparation. Finally, the electrode is bonded to the Nafion membrane by a hot press to obtain a membrane electrode assembly. Among them, the hot pressing step was carried out under the conditions of a pressure of ²⁵ kg/cm ² and a temperature of 125 ° C, and the hot pressing time was 2 minutes. The single cell test will be performed separately below. Please refer to FIG. 2A and FIG. 2B for the test results. FIG. 2A is a single cell test of Pt/Ti _0.5 Ru _0.5 O ₂ , 5 wt% Nafion solution and 0 wt%, 10 wt%, 20 wt% aqueous solution of isopropanol according to the experimental example of the present invention. The performance comparison graph, FIG. 2B is the maximum power density of the Pt/Ti _0.5 Ru _0.5 O ₂ , 5 wt% Nafion solution and the 0 wt%, 10 wt%, 20 wt% isopropyl alcohol aqueous solution respectively for the single cell test according to the experimental example of the present invention. Comparison curve.

As shown in FIG. 2A, when the concentration of the aqueous solution of isopropyl alcohol was adjusted to 10 wt%, 20 wt%, it had a higher open circuit voltage. As shown in FIG. 2B, when the concentration of the aqueous solution of isopropanol is 0 wt%, the maximum power density is 269.8 mW/cm ² , and when the concentration of the aqueous solution of isopropanol is 10 wt%, the maximum power density is 734.3 mW/cm ² . When the concentration of the aqueous solution of isopropanol was 20% by weight, the maximum power density was 531.5 mW/cm ² . That is, when the concentration of the aqueous solution of isopropanol was adjusted from 0 wt% to 20 wt%, the maximum power density was significantly improved (97.00% increase). Further, when the concentration of the aqueous solution of isopropanol is 10% by weight, the maximum power density can reach 734.3 mW/cm ² and the maximum power density is increased by 172.2%. Therefore, in the following tests, the test was carried out with a 10 wt% aqueous solution of isopropanol.

Experimental Example 2: Preparation of a non-carbon carrier slurry composition having different concentrations of Nafion solution and a single cell test.

First, Pt/Ti _0.5 Ru _0.5 O ₂ , a Nafion solution, and a 10 wt% aqueous solution of isopropanol (isopropyl alcohol and ultrapure water) were mixed. Specifically, Pt/Ti _0.5 Ru _0.5 O _{2 used} was 3.75 mg (mg), Nafion solution was 112.5 mg, and 10 wt% aqueous solution of isopropanol was 100 mg. The concentration of the Nafion solution used was 2 wt%, 5 wt%, 10 wt%, and 20 wt%, respectively. Please refer to Table 4 below for the composition of each component. Among them, Table 4 shows the weight of each component and the weight ratio of each component to the total composition. Table 4

Next, the above mixture was stirred with a magnet for about 4 hours to uniformly mix and disperse the mixture to form a non-carbon carrier slurry composition. Next, the obtained non-carbon carrier slurry composition was applied to a carbon cloth having a microvoid gas phase layer to complete electrode preparation. Finally, the electrode is bonded to the Nafion membrane by a hot press to obtain a membrane electrode assembly. Among them, the hot pressing step was carried out under the conditions of a pressure of ²⁵ kg/cm ² and a temperature of 125 ° C, and the hot pressing time was 2 minutes. The single cell test will be performed separately below. For the test results, please refer to FIG. 3A and FIG. 3B. FIG. 3A shows Pt/Ti _0.5 Ru _0.5 O ₂ , 10 wt% aqueous solution of isopropanol and 2 wt%, 5 wt%, 10 wt%, 20 wt% Nafion solution according to the experimental example of the present invention. Figure 3B shows the Pt/Ti _0.5 Ru _0.5 O ₂ , 10 wt% aqueous solution of isopropanol and 2 wt%, 5 wt%, 10 wt%, 20 wt% Nafion solution according to the experimental example of the present invention. A comparison graph of the maximum power density of the battery test.

As shown in FIG. 3A, when the concentration of the Nafion solution was 2 wt%, 5 wt%, 10 wt%, it had a higher open circuit voltage than the 20 wt% Nafion solution. As shown in FIG. 3B, when the concentration of the Nafion solution is 2 wt%, the maximum power density is 884.5 mW/cm ² , and when the concentration of the Nafion solution is 5 wt%, the maximum power density is 734.3 mW/cm ² , when the Nafion solution is The concentration was 10 wt%, the maximum power density was 951.6 mW/cm ² , and when the concentration of the Nafion solution was 20 wt% Nafion solution, the maximum power density was 585.9 mW/cm ² . Among them, when the concentration of the Nafion solution is 10% by weight, the maximum power density can be optimized, and the power density is 951.6 mW/cm ² .

Experimental Example 3: A non-carbon carrier slurry composition having different concentrations of an isopropanol solution and a single cell test were prepared, wherein the catalyst material used in this experimental example was Pt/Ti _0.8 W _0.2 O ₂ .

First, the _{Pt / Ti 0.8 W 0. 2O2,5wt%} Nafion solution and the aqueous isopropanol (isopropyl alcohol, and ultrapure water) were mixed. Specifically, the Pt/Ti _0.8 W _0.2 O _{2 used} was 3.75 mg (mg), the 5 wt% Nafion solution was 112.5 mg, and the isopropyl alcohol aqueous solution was 100 mg. Here, the concentrations of the aqueous isopropanol solution used were 0 wt% and 10 wt%, respectively. Please refer to Table 5 below for the composition of each component. Among them, Table 5 shows the weight of each component and the weight ratio of each component to the total composition. Table 5

Next, the above mixture was stirred with a magnet for about 4 hours to uniformly mix and disperse the mixture to form a non-carbon carrier slurry composition. Next, the obtained non-carbon carrier slurry composition was applied to a carbon cloth having a microvoid gas phase layer to complete electrode preparation. Finally, the electrode is bonded to the Nafion membrane by a hot press to obtain a membrane electrode assembly. Among them, the hot pressing step was carried out under the conditions of a pressure of ²⁵ kg/cm ² and a temperature of 125 ° C, and the hot pressing time was 2 minutes. The single cell test will be performed separately below. Please refer to FIG. 4A and FIG. 4B for the test results. FIG. 4A is a comparison of the efficacy of Pt/Ti _0.8 W _0.2 O ₂ , 5 wt% Nafion solution and 0 wt%, 10 wt% aqueous solution of isopropanol in single cell test according to the experimental example of the present invention. Graph, FIG. 4B is a graph comparing the maximum power density of a single cell test of Pt/Ti _0.8 W _0.2 O ₂ , 5 wt% Nafion solution, and 0 wt%, 10 wt% aqueous solution of isopropanol, respectively, according to an experimental example of the present invention.

As shown in FIG. 4A, when the concentration of the aqueous solution of isopropyl alcohol is 10% by weight, it has a high open circuit voltage. As shown in Fig. 4B, when the concentration of the aqueous solution of isopropyl alcohol was 0% by weight, the maximum power density was 330.4 mW/cm ² . In contrast, when the concentration of the aqueous solution of isopropyl alcohol is 10% by weight, the maximum power density is significantly improved, and the maximum power density can reach 730.7 mW/cm ² , and the maximum power density is increased by 121.2%.

According to the above experimental examples, the non-carbon carrier slurry composition and the fuel cell disclosed in the present invention can effectively improve the fuel by utilizing an aqueous solution of isopropanol to improve the dispersion effect of the catalyst material in the non-carbon carrier slurry composition. The open circuit voltage of the battery and the maximum power density.

In summary, the non-carbon carrier slurry composition and the fuel cell disclosed in the present invention have at least the following advantages:

1. The non-carbon carrier slurry composition disclosed in the present invention and the fuel cell utilize an aqueous solution of isopropanol and an appropriate concentration and weight ratio to improve the dispersion effect of the catalyst material, thereby effectively improving the open circuit voltage of the fuel cell and Maximum power density.

2. The non-carbon carrier slurry composition disclosed in the present invention and the concentration of the appropriate Nafion solution in the fuel cell and the concentration of the aqueous solution of isopropanol can further improve the open circuit voltage and the maximum power density of the fuel cell.

3. The non-carbon carrier slurry composition disclosed in the present invention and the fuel cell select a suitable ratio of the weight of the catalyst material to the aqueous solution of isopropyl alcohol, thereby further improving the open circuit voltage and the maximum power density of the fuel cell.

4. The non-carbon carrier slurry composition disclosed in the present invention and the fuel cell select a suitable weight ratio of the catalyst material to the Nafion solution, and the open circuit voltage and the maximum power density of the fuel cell can be further improved.

5. The non-carbon carrier slurry composition disclosed in the present invention and the fuel cell use a non-carbonaceous catalyst material to improve the stability and performance of the fuel cell.

Although the embodiments of the present invention are disclosed above, it is not intended to limit the present invention, and those skilled in the art, regardless of the spirit and scope of the present invention, the shapes, structures, and features described in the scope of the present application. And the spirit of the invention is subject to change. Therefore, the scope of patent protection of the present invention is subject to the scope of the patent application attached to the specification.

10‧‧‧ fuel cell
100‧‧‧first electrode
200‧‧‧second electrode
300‧‧‧Nafion membrane
400‧‧‧ flow field board
500‧‧‧ bipolar plates

1 is a schematic view of a fuel cell according to an embodiment of the present invention; FIG. 2A is a Pt/Ti _0.5 Ru _0.5 O ₂ , 5 wt% Nafion solution and 0 wt%, 10 wt%, 20 wt% isopropanol according to an experimental example of the present invention. Figure 2B shows the Pt/Ti _0.5 Ru _0.5 O ₂ , 5 wt% Nafion solution and 0 wt%, 10 wt%, 20 wt% aqueous solution of isopropanol in the experimental example according to the present invention. Figure 3A is a comparison of the maximum power density of the battery test; Figure 3A shows the Pt/Ti _0.5 Ru _0.5 O ₂ , 10 wt% aqueous solution of isopropanol and 2 wt%, 5 wt%, 10 wt%, 20 wt% Nafion solution according to the experimental example of the present invention, respectively. Figure 3B shows the Pt/Ti _0.5 Ru _0.5 O ₂ , 10 wt% aqueous solution of isopropanol and 2 wt%, 5 wt%, 10 wt%, 20 wt% Nafion solutions according to the experimental example of the present invention. Comparative graph of maximum power density of single cell test; FIG. 4A is a single cell test of Pt/Ti _0.8 W _0.2 O ₂ , 5 wt% Nafion solution and 0 wt%, 10 wt% aqueous solution of isopropanol, respectively, according to an experimental example of the present invention. Performance comparison graph; and Figure 4B is based on this Inventive Experimental Example A comparative graph of the maximum power density of a single cell test of a Pt/Ti _0.8 W _0.2 O ₂ , a 5 wt% Nafion solution, and a 0 wt%, 10 wt% aqueous solution of isopropanol, respectively.

Claims (9)

A non-carbon carrier slurry composition suitable for preparing an electrode of a fuel cell, the non-carbon carrier slurry composition comprising a catalyst material, a Nafion solution and an aqueous solution of isopropanol, wherein the concentration of the Nafion solution is 2-20% by weight The weight ratio of the catalyst material to the aqueous solution of isopropanol is 3:80, and the weight ratio of the Nafion solution to the aqueous solution of isopropanol is 9:8. The non-carbon carrier slurry composition according to claim 1, wherein the concentration of the aqueous isopropanol solution is 10-20% by weight. The non-carbon carrier slurry composition according to claim 1 or 2, wherein the weight ratio of the weight of the catalyst material to the weight of the isopropanol in the aqueous solution of the isopropanol is substantially 3:8. . The non-carbon carrier slurry composition according to claim 1 or 2, wherein the weight ratio of the weight of Nafion in the Nafion solution to the weight of the isopropanol in the aqueous solution of the isopropanol is substantially 9: 8-16. The non-carbon carrier slurry composition according to claim 1, wherein the catalyst material is Pt/Ti _0.5 Ru _0.5 O ₂ or Pt/Ti _0.8 W _0.2 O ₂ . A fuel cell includes a first electrode, a second electrode, a Nafion film, a two-flow field plate, and two bipolar plates. The Nafion film is sandwiched between the first electrode and the second electrode, and the flow The field plate is connected to the first electrode, the other flow field plate is connected to the second electrode, one bipolar plate is connected to the flow field plate, and the other bipolar plate is connected to the flow field plate, the first electrode has a first a non-carbon carrier slurry composition, the first non-carbon carrier slurry composition comprising a first catalyst material, a first Nafion solution, and a first aqueous solution of isopropanol, wherein the first catalyst material is Pt/Ti _0.5 Ru _0.5 O ₂ , the concentration of the first Nafion solution is 2-20 wt%, the concentration of the first aqueous solution of isopropanol is 10-20 wt%, and the weight ratio of the first catalyst material to the first aqueous solution of isopropanol is 3:80, the first Nafion solution and the first aqueous solution of isopropanol are 9:8 by weight, the second electrode has a second non-carbon carrier slurry composition, and the second non-carbon carrier slurry composition comprises a second catalyst material, a second Nafion solution, and a second aqueous solution of isopropanol, wherein the second catalyst material is Pt/ Ti _0.8 W _0.2 O ₂ , the concentration of the second Nafion solution is 2-20% by weight, the concentration of the second aqueous solution of isopropanol is 10-20% by weight, and the second catalyst material and the second aqueous solution of isopropanol The weight ratio was 3:80, and the weight ratio of the second Nafion solution to the second aqueous solution of isopropanol was 9:8. The fuel cell according to claim 6, wherein the concentration of the first Nafion solution is 10% by weight, the concentration of the first aqueous solution of isopropanol is 10% by weight, and the concentration of the second Nafion solution is 5% by weight. The concentration of the second aqueous solution of isopropanol was 10% by weight. The fuel cell according to claim 6 or 7, wherein the weight ratio of the catalyst material to the weight of the first isopropyl alcohol in the first aqueous solution of isopropyl alcohol is substantially 3:8, The weight ratio of the weight of the second catalyst material to the weight of the first isopropyl alcohol in the second aqueous solution of isopropanol is substantially 3:8. The fuel cell according to claim 6 or 7, wherein the weight ratio of the first Nafion in the first Nafion solution to the weight of the first isopropanol in the first aqueous solution of the isopropanol is substantially It is 9:8, and the weight ratio of the weight of the second Nafion in the second Nafion solution to the weight of the second isopropanol in the second aqueous solution of isopropanol is substantially 9:16.