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Method for improving performance of direct carbon fuel cell of solid oxide

A solid oxide and fuel cell technology, applied in fuel cells, fuel cell additives, circuits, etc., can solve the problems of slow anode reaction rate, affecting battery performance and practical application, and low current density, so as to improve battery current density , improve battery performance, increase the effect of reactivity

Inactive Publication Date: 2011-06-08
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the reaction rate of SO-DCFC anode is slow and the current density is low, which seriously affects the overall performance and practical application of the battery.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Alkali metal salt K 2 CO 3 As catalyst precursor, carbon black is used as solid carbon fuel, and K catalyst is added to carbon black by impregnation method, and the amount of catalyst added is calculated based on the mass ratio of K atoms to carbon black of 10%. will be added with K 2 CO 3 The carbon black used as fuel is placed in the anode cavity of the direct carbon fuel cell, and the -1 Flow of CO 2 As anode carrier gas, at 100ml min -1 Flow of O 2 As a cathode oxidant, the battery operating temperature is 750°C. At this time, the average power density of SO-DCFC is 1477W·m under the condition of 0.7V constant voltage discharge -2 , the CO mole fraction in the outlet anode carrier gas is 19.8%. At this time, at 750 ° C, carbon black is added with K 2 CO 3 The final battery performance is equivalent to that of carbon black without catalyst added at 950°C.

Embodiment 2

[0023] Alkaline earth metal salt Ca(NO 3 ) 2 4H 2 O was used as catalyst precursor, coke was used as solid carbon fuel, and Ca catalyst was added to coke by impregnation method. will be added with Ca(NO 3 ) 2 The coke is placed in the anode cavity of the direct carbon fuel cell as a fuel, with 50ml·min -1 Flow of CO 2 As anode carrier gas, at 100ml min -1 Flow of O 2 As a cathode oxidant, the battery operating temperature is 750°C. At this time, the average power density of SO-DCFC is 1034W·m under the condition of 0.7V constant voltage discharge -2 , the CO mole fraction in the outlet anode carrier gas is 9.21%. At this time, at 750 °C, the coke was added with Ca(NO 3 ) 2 The final battery performance is equivalent to that of carbon black without catalyst added at 880°C.

Embodiment 3

[0025] With transition metal salt Ni(NO 3 ) 2 ·6H 2 O was used as catalyst precursor, graphite was used as solid carbon fuel, and Ni catalyst was added to graphite by impregnation method. The amount of catalyst added was calculated based on the mass ratio of Ni atoms to graphite at 10%. will be added with Ni(NO 3 ) 2 Graphite is placed in the anode cavity of the direct carbon fuel cell as fuel, and the -1 Flow of CO 2 As anode carrier gas, at 100ml min -1 Flow of O 2 As a cathode oxidant, the battery operating temperature is 750°C. At this time, the average power density of SO-DCFC is 1123W·m under the condition of 0.7V constant voltage discharge -2 , the CO mole fraction in the outlet anode carrier gas is 11.4%. At this time, graphite added Ni(NO 3 ) 2 The final battery performance is equivalent to that of carbon black without catalyst added at 900°C.

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Abstract

The invention discloses a method for improving the performance of a direct carbon fuel cell of solid oxide, belonging to the technical field of clean energy. On the basis of the direct carbon fuel cell of the solid oxide, a metal salt is added into the solid carbon fuel to serve as a catalyst; the solid carbon added with the metal salt serves as a fuel and is put in the anode cavity of the direct carbon fuel cell; meanwhile, an anode carrier gas is introduced in to keep the anode reaction atmosphere; air or oxygen is introduced into the cathode to serve as an oxidant; and the working temperature range of the cell is 600-1000DEG C. On the basis of the prior art, the reaction activity of the solid carbon fuel is further improved by the method, the cell working temperature is lowered, and the cell performance is improved.

Description

technical field [0001] The invention belongs to the technical field of clean energy. In particular, it relates to a method of improving the performance of solid oxide direct carbon fuel cells. Background technique [0002] Energy is the pillar of the national economy and the driving force necessary for the development of human society. Since the Industrial Revolution, human power has been obtained mainly through heat engines. However, since the heat engine is limited by the "Carnot limit", it is difficult to improve the efficiency, resulting in a waste of energy, and at the same time, a large amount of pollutants are emitted, which seriously endangers the human living environment. Therefore, exploring clean, environmentally friendly and efficient energy utilization methods has become an inevitable direction of world energy development. [0003] Fuel cells can directly convert chemical energy in fuel into electrical energy, and have the advantages of high energy conversion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04H01M8/04082H01M8/22
CPCY02E60/50
Inventor 蔡宁生李晨史翊翔杨景标
Owner TSINGHUA UNIV
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