Novel symmetrical electrode material, fuel cell and preparation method thereof

A symmetrical electrode and fuel cell technology, applied in fuel cells, battery electrodes, chemical instruments and methods, etc., can solve problems such as unfavorable commercialization of SOFC, difficulty in obtaining stability of symmetrical cells, etc., to expand the three-phase reaction interface, manufacture Simple method, excellent mechanical and electrical properties

Pending Publication Date: 2022-07-29
武汉软件工程职业学院 +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, NCAL-based symmetric batteries are often difficult to achieve ideal stability. For example, Chen Gang et al. reported that the stability of NCAL-based symmetric batteries was only maintained at 5.8h (Chen G, Zhu B, Deng H, et al. Advanced FuelCell Based on Perovskite La-SrTiO3 Semiconductor as the Electrolyte with Superoxide-Ion Conduction), which is not conducive to the commercialization of SOFC

Method used

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  • Novel symmetrical electrode material, fuel cell and preparation method thereof
  • Novel symmetrical electrode material, fuel cell and preparation method thereof
  • Novel symmetrical electrode material, fuel cell and preparation method thereof

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preparation example Construction

[0047] According to the technical solution of the present invention, a specific method for preparing a novel symmetric electrode material includes the following steps:

[0048] (1) The CoSO 4 ·7H 2 O and MnSO 4 ·4H 2 O is mixed and dissolved in deionized water according to the stoichiometric ratio, and Na with a concentration of 1.5 to 2.5 mol / L is added to the mixed solution. 2 CO 3 The solution is 300-400ml, and an ammonia solution with a concentration of 1.5-2.5mol / L is added to adjust the pH to 7-8, and then heated in a water bath at 35-45°C to obtain a precipitate;

[0049] (2) after solid-liquid separation and washing of the obtained precipitate, drying at 110-130° C. for 10-14 hours to obtain an intermediate product;

[0050] (3) heating the obtained intermediate product at 350-450° C. for 9-11 h to obtain a decomposed product;

[0051] (4) The obtained decomposed product was mixed with Ni(NO 3 ) 2 ·6H 2 O and LiNO 3 The mixture is uniformly mixed according to...

Embodiment 1

[0063] ABO is prepared by the following procedure 2 Type oxide LNCM:

[0064] (1) CoSO with a stoichiometric ratio of 1:1 4 ·7H 2 O and MnSO 4 ·4H 2 O powder was mixed and dissolved in deionized water to form a mixed solution with a solute concentration of 2 mol / L, and then 2 mol / L Na 2 CO 3 The solution was uniformly added to the obtained sulfate mixed solution to form a purple precipitate. Weigh 5 g of ammonia water with a concentration of 20%, add 343 ml of deionized water, and stir evenly to form a 0.24 mol / L ammonia solution. Slowly drop the ammonia solution. Add into the mixed solution to adjust the pH, control the pH of the solution at 7.5, and place the mixed solution on a stirrer with a temperature of 40°C and a rotation speed of 800r / min for 4h;

[0065] (2) filter the precipitate obtained in step (1), and rinse twice with deionized water to remove residual Na 2 CO 3 ;

[0066] (3) placing the obtained precipitate in a blast drying oven with a temperature of...

Embodiment 2

[0071] Symmetrical electrodes are prepared by the following procedure:

[0072] According to the ratio of mass to volume of 3:1, for example, 3 g of LNCM powder obtained in Example 1 corresponds to 1 ml of terpineol. The LNCM powder and terpineol were mixed uniformly in a grinding bowl and ground for 15 minutes to form a uniform slurry. The obtained slurry was evenly spread on nickel foam with a thickness of 2 mm, and then placed in a blast drying oven with a temperature of 120 °C for 30 min to prepare a Ni-LNCM electrode.

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Abstract

The invention discloses a novel symmetrical electrode material, a fuel cell and a preparation method of the fuel cell. The chemical formula of the novel symmetrical electrode material is Li [Ni < x > Co < 2 / 3-x > Mn < 1 / 3 >] O < 2 >, and x is equal to 1 / 6, 1 / 3, 1 / 2 and 2 / 3. The electrode material is composed of more stable elements, has more excellent catalytic activity, not only can effectively transmit electrons and ions obtained through catalysis, but also can improve a three-phase reaction interface, and the solid oxide fuel cell which has the advantages that all parts are tightly combined, thermal expansion coefficients are mutually matched and good electrical performance is still kept at medium and low temperatures is obtained.

Description

technical field [0001] The present invention relates to the technical field of solid oxide fuel cells, in particular to the technical field of solid oxide fuel cells based on symmetrical electrodes. Background technique [0002] With the increasingly prominent problems of environmental pollution and energy crisis, the research and development of renewable and non-polluting new energy technologies has been put on the agenda. In the field of new energy, fuel cells occupy an important place and are considered to be one of the most promising products to replace traditional fossil energy power generation. In the field of fuel cells, solid oxide fuel cells (SOFC), as a new type of non-polluting power generation device, due to its unique advantages, including flexible fuel selection, not limited by the Carnot cycle, high energy conversion efficiency, noiseless, clean and free Pollution and other advantages have aroused widespread concern. [0003] A conventional SOFC consists of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90C01G53/00H01M8/1253H01M8/126
CPCH01M4/9025H01M8/1253H01M8/126C01G53/44H01M4/905H01M2008/1293H01M2004/8689
Inventor 郑丹汪宝元王凯王浩吴玉华
Owner 武汉软件工程职业学院
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