A perovskite structure material coated nickel-based anode catalyst

Abstract

The application discloses a perovskite structure material coated nickel-based anode catalyst, which is prepared by coating perovskite structure material on the surface of nickel oxide catalyst; the perovskite structure material is [La x Sr (1‑x) ] y Ti (1‑z‑n) Ni z Mg n O 3±δ , wherein, δ represents oxygen non-stoichiometry value caused by doping, 0 <= x <= 0.8, 0.7 <= y <= 1.2, 0 < z <= 0.4, 0 < n <= 0.4, under the reduction condition, the surface of the perovskite structure material can further form metal-oxide composite nanoparticle active center, and the active center has the characteristics of high activity, good stability and anti-coking. The perovskite structure material is coated on the nickel oxide catalyst to obtain high-activity anti-coking solid oxide fuel cell anode catalyst, and the anode catalyst is prepared into a solid oxide fuel cell; when carbon-containing fuels such as methane, methanol and ethanol are used, the cell has the characteristics of high performance, anti-coking and good stability.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of solid oxide fuel cell, in particular to a perovskite structure material coated nickel-based anode catalyst. BACKGROUND

[0002] Energy and environment have become two hot issues related to the sustainable development of human society. With the continuous advancement of modernization of human society, the contradiction between the increasing dependence on energy and the increasing depletion of fossil energy is intensifying. The emission of a large amount of pollutants and CO2 and other greenhouse gases in the process of energy production and use is one of the important air pollution sources, and finding clean, efficient and low CO2 net emission energy technology has become an urgent need for the development of human society.

[0003] Solid oxide fuel cell is an energy conversion device that can efficiently convert the chemical energy in fuel (such as natural gas, methanol, ethanol and other carbon-containing fuels) into electrical energy and heat energy, and does not use noble metal catalysts, adopts a full solid structure, has low emissions and low noise, and is an ideal decentralized power station and centralized power station technology, which can also be applied to vehicle auxiliary power, portable power and the like. In order to meet the requirements of commercialization, improving the performance, long-term stability and reliability of the cell has become the focus of research and development at home and abroad.

[0004] Nickel-based anodes have become the most commonly used anode material for solid oxide fuel cells due to their high electrical conductivity and good activity, but when using methane, methanol and ethanol and other carbon-containing fuels, the performance of the cell is relatively low, and compared with hydrogen-based fuel cells, the complex electrochemical process significantly increases the performance loss of the anode, and carbon deposition is very easy to form on the nickel-based anode, which leads to continuous reduction of electrode activity and even deactivation, resulting in poor cell stability. Therefore, high-activity, anti-carbon-deposition anode catalysts are crucial for solid oxide fuel cells using methane, methanol and ethanol and other carbon-containing fuels to meet the requirements of commercialization. SUMMARY

[0005] Based on the above technical problems, the present application provides a perovskite structure material coated nickel-based anode catalyst.

[0006] The technical solution adopted by the present application is as follows:

[0007] A perovskite structure material coated nickel-based anode catalyst, which is prepared by coating a perovskite structure material on the surface of a nickel oxide catalyst;

[0008] The perovskite structure material is: [La x Sr (1-x) ] y Ti (1-z-n) Ni z Mg n O 3±δWherein, delta represents the oxygen non-stoichiometry value caused by doping, 0<=x<=0.8, 0.7<=y<=1.2, 0<z<=0.4, 0<n<=0.4, the perovskite structure material can form metal-oxide composite nanoparticle active centers on the surface under a reducing atmosphere, and the nanoparticle active centers have the characteristics of high catalytic activity, high stability and good anti-carbon deposition performance.

[0009] Optionally, the mass percentage of the perovskite structure material in the catalyst is 0.1%-60%.

[0010] Optionally, the mass percentage of the perovskite structure material in the catalyst is 1%-50%.

[0011] Optionally, the particle size of the perovskite structure material is 5-300nm.

[0012] Optionally, the particle size of the perovskite structure material is 10-200nm.

[0013] Under a reducing condition, the perovskite structure material can form metal-oxide composite nanoparticle active centers on the surface, and the particle size of the nanoparticle active centers is 0.1-20nm.

[0014] Optionally, the particle size of the nanoparticle active centers is 0.2-10nm.

[0015] Optionally, the perovskite structure material is wrapped on the surface of the nickel oxide catalyst, and the method comprises the following steps:

[0016] The perovskite structure material is used to prepare a solution, and then the solution is directly immersed on the surface of the nickel oxide catalyst, and then calcination is performed to obtain a nickel-based anode catalyst wrapped with the perovskite structure material;

[0017] Or, a salt solution is prepared according to the stoichiometric ratio of the perovskite structure material, and then the solution is directly immersed on the surface of the nickel-based composite anode, and then calcination is performed to obtain a nickel-based anode catalyst wrapped with the perovskite structure material.

[0018] Optionally, the mass percentage concentration of the perovskite structure material used to prepare the solution is 0.2%-20%, and the solution is a high-dispersion solution.

[0019] Optionally, the total mass percentage concentration of the salt solution prepared according to the stoichiometric ratio of the perovskite structure material is 0.2%-30%.

[0020] Optionally, the calcination temperature is 800-1300 DEG C, and the calcination time is 2-24h.

[0021] The application further provides an application of the above anti-carbon deposition solid oxide fuel cell anode catalyst.

[0022] In some embodiments, the anti-carbon deposition solid oxide fuel cell anode catalyst is used on solid oxide fuel cells of various configurations, including but not limited to flat plate type, tube type, anode support type and electrolyte support type.

[0023] The beneficial technical effects of the present application are:

[0024] The present application adopts perovskite structure material to wrap on the surface of nickel oxide catalyst, to obtain high activity anti-carbon deposition solid oxide fuel cell anode catalyst, and the battery prepared by using the anode catalyst has the characteristics of high performance, anti-carbon deposition and good stability when using carbon-containing fuels such as methane, methanol or ethanol; in addition, the preparation method of the catalyst also has the characteristics of low cost, simple and easy to scale up, etc. More specifically:

[0025] 1. The battery anode catalyst prepared by the present application adopts perovskite structure material to wrap on the surface of nickel oxide catalyst, and the metal-oxide composite nanoparticle active center formed on the surface of the perovskite structure material can effectively increase the electrode active site, improve the electrode activity, and reduce the polarization resistance of the battery.

[0026] 2. The battery anode catalyst prepared by the present application adopts perovskite structure material to wrap on the surface of nickel oxide catalyst, and the metal-oxide composite nanoparticle on the surface of the perovskite structure material can effectively inhibit the formation of carbon deposition, and the carbon deposition inhibition mechanism is as shown in the figure. Figure 1 The catalyst can effectively improve the anti-carbon deposition performance of the battery and improve the stability of the battery when using carbon-containing fuels such as methane, methanol and ethanol.

[0027] 3. The perovskite structure material of the present application is modified by magnesium, and magnesium and nickel are dissolved and separated from the reducing atmosphere of the battery to form high-activity nanoparticles with nickel-magnesium solid solution structure, which have high activity, good stability and good anti-carbon deposition performance.

[0028] 4. The battery anode catalyst prepared by the present application can be used in solid oxide fuel cells of various configurations such as flat plate type, tube type, anode support type and electrolyte support type.

[0029] 5. The preparation method of the battery anode catalyst of the present application has the characteristics of low cost, simple and easy to scale up.

[0030] 6. The present application is an anode catalyst suitable for solid oxide fuel cells, which has important significance for promoting the development of solid oxide fuel cell technology to application technology. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1Fig. 1 is a schematic diagram of a carbon deposition inhibition mechanism of a metal-oxide composite nanoparticle on the upper surface of a nickel-based anode catalyst wrapped by a perovskite structure material in the present application, wherein (a) is a carbon deposition growth mechanism of a nickel nanoparticle, and (b) is a carbon deposition inhibition mechanism of a metal-oxide composite nanoparticle.

[0032] Figure 2 Fig. 2 is an electron microscope image of a nickel-based anode catalyst wrapped by a perovskite structure material and nickel oxide in the present application, wherein (a) is a nickel oxide catalyst, and (b) is a nickel-based anode catalyst wrapped by a perovskite structure material. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0034] A nickel-based anode catalyst wrapped by a perovskite structure material, which is prepared by wrapping a perovskite structure material on the surface of a nickel oxide catalyst.

[0035] The perovskite structure material is [La x Sr (1-x) ] y Ti (1-z-n) Ni z Mg n O 3±δ , wherein δ represents an oxygen non-stoichiometric value caused by doping, 0≤x≤0.8, 0.7≤y≤1.2, 0

[0036] Optionally, the mass percentage of the perovskite structure material wrapped in the catalyst is 0.1%-60%.

[0037] Optionally, the particle size of the perovskite structure material is 5-300 nm.

[0038] Under a reducing condition, the perovskite structure material surface will form a metal-oxide composite nanoparticle active center, and the nanoparticle active center has a particle size of 0.1-20 nm.

[0039] Optionally, the particle size of the nanoparticle active center is 0.2-10 nm.

[0040] Optionally, the perovskite structure material is wrapped on the surface of the nickel oxide catalyst, such as Figure 2 (b) and specifically comprises the following steps:

[0041] The perovskite structure material is prepared into a solution, and then the solution is directly immersed on the surface of the nickel oxide catalyst, and then calcined to obtain a nickel-based anode catalyst wrapped with the perovskite structure material.

[0042] Or, a salt solution is prepared according to the stoichiometric ratio of the perovskite structure material, and then the solution is directly immersed on the nickel-based composite anode, and then calcined to obtain a nickel-based anode catalyst wrapped with the perovskite structure material.

[0043] Optionally, the mass percentage concentration of the perovskite structure material solution is 0.2%-20%, and the solution is a high-dispersion solution.

[0044] Optionally, the total mass percentage concentration of the salt solution prepared according to the stoichiometric ratio of the perovskite structure material is 0.2%-30%.

[0045] Optionally, the calcination temperature is 800-1300℃, and the calcination time is 2-24h.

[0046] The application is further described below through specific examples.

[0047] Example 1

[0048] The perovskite structure material La 0.18 Sr 0.76 Ti 0.7 Ni 0.2 Mg 0.1 O 3±δ with a particle size of about 40nm is prepared into a high-dispersion solution, and then immersed on the surface of the nickel oxide, and then calcined at 800℃ for 2h to obtain a nickel-based anode catalyst wrapped with the perovskite structure material La 0.18 Sr 0.76 Ti 0.7 Ni 0.2 Mg 0.1 O 3±δ , wherein the mass percentage content of the perovskite structure material La 0.18 Sr 0.76 Ti 0.7 Ni 0.2 Mg 0.1 O 3±δ is 10%. The perovskite structure material La 0.18 Sr 0.76 Ti 0.7 Ni 0.2 Mg 0.1 O 3±δThe encapsulated nickel-based catalyst serves as the anode catalyst, in conjunction with gadolinium-doped cerium oxide (GdO2). 0.2 Ce 0.8 O2 and GDC are mixed in a weight ratio of 50:50 to prepare the anode. GDC is used as the electrolyte, and La... 0.6 Sr 0.4 Co 0.2 Fe 0.8 O3 and GDC are mixed in a mass ratio of 50:50 and used as the cathode to prepare a battery.

[0049] Using traditional Ni-GDC / GDC / LSCF-GDC batteries as a comparison, when methane is used as fuel, the perovskite-structured material La 0.18 Sr 0.76 Ti 0.7 Ni 0.2 Mg 0.1 O 3±δ Compared with conventional Ni-GDC anode batteries, the battery performance using the encapsulated nickel oxide catalyst as the anode catalyst material shows an approximately 50% increase in output power at 600℃. The battery also exhibits good stability; stability tests conducted at 600℃ using methane as fuel showed a 60% reduction in degradation rate per 100 hours compared to conventional Ni-GDC anode batteries.

[0050] Using a traditional Ni-GDC / GDC / LSCF-GDC battery as a control, and employing a mixed solution of ethanol and water (molar ratio of 1:2) as fuel, the perovskite-structured material La... 0.18 Sr 0.76 Ti 0.7 Ni 0.2 Mg 0.1 O 3±δ The performance of the battery using the encapsulated nickel oxide catalyst as the anode catalyst is improved by approximately 45% compared to that of a conventional Ni-GDC anode battery at 600℃. The battery also exhibits good stability; stability tests were conducted at 600℃ using a mixture of ethanol and water (molar ratio 1:2) as fuel, showing a 65% reduction in degradation rate per 100 hours compared to a conventional Ni-GDC anode battery.

[0051] Using a traditional Ni-GDC / GDC / LSCF-GDC battery as a control, and employing a 1:1 mixture of methanol and water as fuel, the perovskite-structured material La... 0.18 Sr 0.76 Ti 0.7 Ni 0.2 Mg 0.1 O 3±δThe battery performance of the coated nickel oxide catalyst as an anode catalytic material is compared with the battery performance of a conventional Ni-GDC anode battery. The battery output power at 600°C is increased by about 38%. The battery has good stability. The stability test is performed using a mixture of methanol and water (molar ratio of 1:1) as fuel at 600°C. Compared with the conventional Ni-GDC anode battery, the decay rate per hundred hours is reduced by 55%.

[0052] Example 2

[0053] A perovskite structure material La 0.2 Sr 0.75 Ti 0.5 Ni 0.25 Mg 0.25 O 3±δ with a particle size of about 80 nm is prepared into a highly dispersed solution, and then impregnated on the surface of nickel oxide. The perovskite structure material La 0.2 Sr 0.75 Ti 0.5 Ni 0.25 Mg 0.25 O 3±δ coated nickel-based anode catalyst is obtained by calcining at 900°C for 2 h. 0.2 Sr 0.75 Ti 0.5 Ni 0.25 Mg 0.25 O 3±δ The mass percentage of the perovskite structure material La 0.2 Sr 0.75 Ti 0.5 Ni 0.25 Mg 0.25 O 3±δ coated nickel-based catalyst is 30%. The perovskite structure material La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O3 is selected. The nickel-based catalyst coated with the perovskite structure material La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O3 is mixed with GDC at a weight ratio of 50:50 to prepare an anode. GDC is used as an electrolyte. La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O3 and GDC are mixed at a weight ratio of 50:50 to prepare a cathode. A battery is prepared.

[0054] The conventional Ni-GDC / GDC / LSCF-GDC battery is used as a comparative battery. When methane is used as fuel, the perovskite structure material La 0.2 Sr 0.75 Ti 0.5 Ni 0.25 Mg 0.25 O 3±δThe battery performance of the coated nickel-based catalyst as an anode catalytic material was compared with that of a traditional Ni-GDC anode battery, and the battery output power at 600°C was increased by about 45%. The battery had good stability, and the decay rate per hundred hours was reduced by 80% compared with that of a traditional Ni-GDC anode battery when using methane as fuel at 600°C.

[0055] When using a mixed solution (molar ratio of 1:2) of ethanol and water as fuel, the perovskite structure material La 0.2 Sr 0.75 Ti 0.5 Ni 0.25 Mg 0.25 O 3±δ The battery performance of the coated nickel-based catalyst as an anode catalytic material was compared with that of a traditional Ni-GDC anode battery, and the battery output power at 600°C was increased by about 35%. The battery had good stability, and the decay rate per hundred hours was reduced by 70% compared with that of a traditional Ni-GDC anode battery when using a mixed solution (molar ratio of 1:2) of ethanol and water as fuel at 600°C.

[0056] When using a mixed solution (molar ratio of 1:1) of methanol and water as fuel, the perovskite structure material La 0.2 Sr 0.75 Ti 0.5 Ni 0.25 Mg 0.25 O 3±δ The battery performance of the coated nickel-based catalyst as an anode catalytic material was compared with that of a traditional Ni-GDC anode battery, and the battery output power at 600°C was increased by about 50%. The battery had good stability, and the decay rate per hundred hours was reduced by 75% compared with that of a traditional Ni-GDC anode battery when using a mixed solution (molar ratio of 1:1) of methanol and water as fuel at 600°C.

[0057] Example 3

[0058] The perovskite structure material La 0.3 Sr 0.65 Ti 0.8 Ni 0.1 Mg 0.1 O 3±δ A solution was prepared according to the stoichiometric ratio La 0.3 Sr0.65 Ti 0.8 Ni 0.1 Mg 0.1 O 3±δ perovskite material La 0.3 Sr 0.65 Ti 0.8 Ni 0.1 Mg 0.1 O 3±δ 20%. The perovskite material La 0.3 Sr 0.65 Ti 0.8 Ni 0.1 Mg 0.1 O 3±δ perovskite material La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O3 and GDC in a weight ratio of 50:50 as the cathode to prepare the battery.

[0059] The battery using the perovskite material La 0.3 Sr 0.65 Ti 0.8 Ni 0.1 Mg 0.1 O 3±δ perovskite material La 0.3 Sr 0.65 Ti 0.8 Ni 0.1 Mg 0.1 O 3±δ as the anode catalyst material has a battery performance that is about 70% higher than that of the traditional Ni-GDC anode battery at 600°C. The battery has good stability, and when using methane as fuel at 600°C, the decay rate per hundred hours is reduced by 80% compared with the traditional Ni-GDC anode battery.

[0060] The battery using the perovskite material La 0.3 Sr 0.65 Ti 0.8 Ni 0.1 Mg 0.1 O 3±δ as the anode catalyst material has a battery performance that is about 70% higher than that of the traditional Ni-GDC anode battery at 600°C. The battery has good stability, and when using methane as fuel at 600°C, the decay rate per hundred hours is reduced by 80% compared with the traditional Ni-GDC anode battery.

[0060] The battery using the perovskite material La 0.3 Sr 0.65 Ti 0.8 Ni 0.1 Mg 0.1 O 3±δThe battery performance of the coated nickel-based catalyst as an anode catalytic material is compared with that of a conventional Ni-GDC anode battery, and the battery output power at 600°C is increased by about 55%. The battery has good stability, and the decay rate per hundred hours is reduced by 70% compared with that of a conventional Ni-GDC anode battery when a mixed solution of ethanol and water (molar ratio of 1:2) is used as fuel for stability testing at 600°C.

[0061] When a mixed solution of methanol and water (molar ratio of 1:0.5) is used as fuel, the perovskite structure material La 0.3 Sr 0.65 Ti 0.8 Ni 0.1 Mg 0.1 O 3±δ The battery performance of the coated nickel-based catalyst as an anode catalytic material is compared with that of a conventional Ni-GDC anode battery, and the battery output power at 600°C is increased by about 60%. The battery has good stability, and the decay rate per hundred hours is reduced by 60% compared with that of a conventional Ni-GDC anode battery when a mixed solution of methanol and water (molar ratio of 1:0.5) is used as fuel for stability testing at 600°C.

[0062] Example 4

[0063] The perovskite structure material La 0.2 Sr 0.6 Ti 0.4 Ni 0.3 Mg 0.3 O 3±δ A solution is prepared according to the stoichiometric ratio La 0.2 Sr 0.6 Ti 0.4 Ni 0.3 Mg 0.3 O 3±δ The coated nickel-based anode catalyst, wherein the mass percentage of the perovskite structure material La 0.2 Sr 0.6 Ti 0.4 Ni 0.3 Mg 0.3 O 3±δ is 40%. The perovskite structure material La 0.2 Sr 0.6 Ti 0.4 Ni 0.3 Mg 0.3 O 3±δA nickel-based catalyst, encapsulated as the anode catalyst, was mixed with GDC at a weight ratio of 60:40 to prepare the anode. GDC served as the electrolyte, and La... 0.6 Sr 0.4 Co 0.2 Fe 0.8 O3 and GDC are mixed in a weight ratio of 50:50 to form a cathode for preparing a battery.

[0064] Using traditional Ni-GDC / GDC / LSCF-GDC batteries as a comparison, when methane is used as fuel, the perovskite-structured material La 0.2 Sr 0.6 Ti 0.4 Ni 0.3 Mg 0.3 O 3±δ Compared to conventional Ni-GDC anode batteries, the battery performance using a coated nickel-based catalyst as the anode catalyst is improved by approximately 50% at 600℃. The battery also exhibits good stability; stability tests conducted at 600℃ using methane as fuel showed a 90% reduction in degradation rate per 100 hours compared to conventional Ni-GDC anode batteries.

[0065] Using a traditional Ni-GDC / GDC / LSCF-GDC battery as a control, and employing a mixed solution of ethanol and water (molar ratio of 1:2) as fuel, the perovskite-structured material La... 0.2 Sr 0.6 Ti 0.4 Ni 0.3 Mg 0.3 O 3±δ Compared with conventional Ni-GDC anode batteries, the battery performance of the encapsulated nickel-based catalyst as the anode catalyst material shows an approximately 45% increase in output power at 600℃. The battery also exhibits good stability; stability tests were conducted at 600℃ using a mixture of ethanol and water (molar ratio 1:2) as fuel, showing a 95% reduction in degradation rate per 100 hours compared to conventional Ni-GDC anode batteries.

[0066] Using a traditional Ni-GDC / GDC / LSCF-GDC battery as a control, and employing a mixed solution of methanol and water (molar ratio of 1:0.5) as fuel, the perovskite-structured material La... 0.2 Sr 0.6 Ti 0.4 Ni 0.3 Mg 0.3 O 3±δThe battery performance of the coated nickel-based catalyst as an anode catalytic material is compared with that of a traditional Ni-GDC anode battery, and the battery output power at 600℃ is increased by about 40%. The battery has good stability, and the stability test is carried out using a mixed solution of methanol and water (molar ratio of 1:0.5) as fuel at 600℃. Compared with the traditional Ni-GDC anode battery, the decay rate per hundred hours is reduced by 90%.

[0067] The application discloses a surface nanophase high-activity anti-carbon-deposition solid oxide fuel cell anode catalyst coated with a perovskite structure material on the surface of a nickel oxide catalyst, wherein the perovskite structure material plays a role in improving electrode activity and anti-carbon-deposition, and the nickel-based catalyst plays a role in skeleton and improving anode conductivity. The battery anode catalyst is used in a solid oxide fuel cell, and has the characteristics of anti-carbon-deposition and high activity when using carbon-containing fuels such as methane, methanol or ethanol. The battery anode catalyst can greatly improve the performance and stability of the solid oxide fuel cell.

[0068] Of course, the above description is not a limitation of the present application, and the present application is not limited to the above examples. Changes, modifications, additions or replacements made by those skilled in the art within the essential scope of the present application should also belong to the protection scope of the present application.

Claims

1. A perovskite-structured material-coated nickel-based anode catalyst, characterized by, The anode catalyst is prepared by wrapping a perovskite structure material on the surface of a nickel oxide catalyst; The perovskite structure material is: [La x Sr (1-x) ] y Ti (1-z-n) Ni z Mg n O 3±δ , wherein, δ represents the oxygen non-stoichiometry value generated due to doping, 0≤x≤0.8, 0.7≤y≤1.2, 0 z≤0.4, 0 n≤0.4, the perovskite structure material forms metal-oxide composite nanoparticle active centers on the surface under a reducing atmosphere. The particle size of the perovskite structure material is 10-200 nm; The particle size of the nanoparticle active center is 0.1-20 nm; The perovskite structure material is wrapped on the surface of a nickel oxide catalyst, including the following steps: A solution of the perovskite structure material is prepared, and then the solution is directly immersed on the surface of a nickel oxide catalyst, and calcination is performed to obtain a perovskite structure material-wrapped nickel-based anode catalyst; Or a salt solution is prepared according to the stoichiometric ratio of the perovskite structure material, and then the salt solution is directly immersed on the surface of a nickel oxide catalyst, and calcination is performed to obtain a perovskite structure material-wrapped nickel-based anode catalyst; The nickel-based anode catalyst is used on a solid oxide fuel cell, and the solid oxide fuel cell uses methane, methanol or ethanol as a raw material.

2. The nickel-based anode catalyst encapsulated in a perovskite structure material according to claim 1, characterized in that, The mass percentage content of the perovskite structure material in the perovskite structure material-wrapped nickel-based anode catalyst is 1%-50%.

3. The nickel-based anode catalyst encapsulated in a perovskite-structured material according to claim 1, characterized in that, The mass percentage concentration of the solution prepared from the perovskite structure material is 0.2%-20%.

4. The nickel-based anode catalyst encapsulated in a perovskite-structured material according to claim 1, characterized in that, The total mass percentage concentration of the salt solution prepared according to the stoichiometric ratio of the perovskite structure material is 0.2%-30%.

5. The nickel-based anode catalyst encapsulated in a perovskite-structured material according to claim 1, characterized in that, The calcination temperature is 800-1300℃, and the calcination time is 2-24 h.

6. Use of a perovskite material-coated nickel-based anode catalyst according to any one of claims 1 to 5, characterized in that The catalyst is used on various structures of solid oxide fuel cells, including flat plate type, tube type, anode support type and electrolyte support type.

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