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High-temperature ionic liquid-based fuel cell

A technology for ionic liquids and fuel cells, applied in fuel cells, fuel cell parts, battery electrodes, etc., can solve the problems of easy poisoning of catalysts, high cost, easy loss of proton conductors, etc., and achieve the effect of preventing electrodes from being flooded

Active Publication Date: 2017-07-04
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above-mentioned problems in the prior art, the object of the present invention is to provide a high-temperature ionic liquid-based fuel cell. The fuel cell of the present invention can work stably within the range of 250°C to 350°C, which can solve the problem of existing proton fuel cells. High reliance on platinum catalysts, easy poisoning of catalysts, easy loss of proton conductors, complex hydrothermal management systems and other problems, and the operating temperature of solid oxide fuel cells is limited to above 600 °C, resulting in complex preparation processes, high cost, and requirements for thermal compatibility of materials advanced questions

Method used

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Effect test

Embodiment 1

[0099] This embodiment provides an electrolyte-supported fuel cell named SDC-IL battery, the electrolyte diaphragm in the fuel cell is a solid oxide / ionic liquid composite electrolyte diaphragm, and the solid oxide is an oxygen ion type solid oxide SDC (the solid oxide / ionic liquid composite electrolyte membrane is referred to as SDC-IL composite electrolyte membrane for short).

[0100] Preparation:

[0101] (1) Synthesize SDC powder by urea spontaneous combustion method. The molar ratio of metal ions to urea is 1:3, the powder obtained by spontaneous combustion is ball-milled with alcohol for 48 hours, and the powder obtained after drying is pressed into a small cake with a diameter of 20mm and a thickness of 1mm under a pressure of 100Mp, and then Sinter at 1000°C for 4h.

[0102] (2) Preparation of SDC-IL composite electrolyte separator: SDC was used as a substrate, and ionic liquid (the ionic liquid was nitrogen methylimidazole trifluoromethanesulfonate) was vacuum impr...

Embodiment 2

[0109] This embodiment provides an anode-supported fuel cell named (NiO+SDC)-(SDC-IL) cell, the electrolyte membrane in the fuel cell is a solid oxide / ionic liquid composite electrolyte membrane, and the solid The oxide is an oxygen ion type solid oxide SDC (the solid oxide / ionic liquid composite electrolyte membrane is referred to as SDC-IL composite electrolyte membrane for short); the anode material in the fuel cell is a mixture of NiO and SDC.

[0110] Preparation:

[0111] (1) SDC powder was synthesized by co-precipitation method. Weigh a certain amount of samarium nitrate and cerium nitrate according to the stoichiometric ratio and dissolve them in deionized water, then add the obtained nitrate solution back dropwise into ammonia water, heat and stir at 80°C for 2 hours, cool to room temperature, and deionize successively SDC raw powder was obtained after washing with water and alcohol suction filtration and drying, and annealed at 600°C and 800°C for 2 hours respective...

Embodiment 3

[0119] The solid oxide in the solid oxide / ionic liquid composite electrolyte separator is proton-type solid oxide BaCe 0.6 Zr 0.3 Y 0.1 o 3-δ , and replace the SDC substrate with BaCe 0.6 Zr 0.3 Y 0.1 o 3-δ Except for the base, other contents are the same as in Example 1.

[0120] The same method as in Example 1 was used to test, and the result showed that a voltage of 0.9V could be obtained at 300°C.

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Abstract

The invention belongs to the technical field of electrochemical and energy materials, and discloses a high-temperature ionic liquid-based fuel cell. A negative electrode of the fuel cell comprises a non-platinum based oxygen catalyst with ternary conductivity (electrons, protons and oxygen ions), an ionic liquid-based electrolyte separator is prepared by using an ionic liquid with high stability and high ionic conductivity and is applied to the fuel cell, so that the fuel cell can have excellent effect in a matching way. The fuel cell can stably work at 250-350 DEG C, carbon hydrogen can be directly used as a fuel, and the problems of high dependence, fuel monotony (only pure hydrogen can be used as the fuel), easiness in toxication of the catalyst, complicated hydrothermal management system and the like of an existing proton exchange membrane fuel cell on a precious metal catalyst such as platinum can be effectively solved. The fuel cell can be a dual-cavity chamber fuel cell or a single-cavity chamber fuel cell, and the wide application of the fuel cell in the field of a vehicle, a portable power generation device and the like is expected to be achieved.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry and energy materials, and relates to a fuel cell, in particular to a high-temperature ionic liquid-based fuel cell. Background technique [0002] As an energy conversion device, fuel cells have the advantages of high efficiency, cleanliness, easy modularization, strong environmental adaptability, and no need for grid-connected power generation. Therefore, they can be widely used in fixed power generation systems, household distributed power sources, transportation It is one of the most potential technologies in the future clean energy industry. At present, the two types of fuel cells that are most concerned by scientists and engineers - exchange membrane fuel cells (PEMFC) and solid oxide fuel cells (SOFC) - cannot be industrialized due to their respective limitations. For example, PEMFC has a high Relying on platinum catalysts, catalysts easily poisoned by hydrocarbon fuel by-products, ...

Claims

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Application Information

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IPC IPC(8): H01M4/90H01M8/0239H01M8/023
CPCH01M4/9025H01M4/905H01M8/023H01M8/0239Y02E60/50
Inventor 徐保民李向楠张杰
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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