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Preparation method of LSCF/Na2CO3 nanocomposite as fuel cell ion transmission layer

A nanocomposite material and ion transport layer technology, applied in fuel cells, circuits, electrical components, etc., can solve the problems of electrolyte and electrode interface diffusion, narrow material selection range, battery life reduction, etc., to achieve good power output and preparation process Ease of operation, high power output effect

Inactive Publication Date: 2018-11-13
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in order to obtain a sufficiently high oxygen ion conductivity (0.1S / cm) for the electrolyte YSZ, the battery needs to work at a high temperature of 1000°C. High temperature work will easily lead to electrode sintering, interfacial diffusion between the electrolyte and the electrode, and thermal expansion mismatch. Problems such as narrow selection range, excessive mechanical stress between interfaces, and reduced battery life

Method used

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  • Preparation method of LSCF/Na2CO3 nanocomposite as fuel cell ion transmission layer
  • Preparation method of LSCF/Na2CO3 nanocomposite as fuel cell ion transmission layer
  • Preparation method of LSCF/Na2CO3 nanocomposite as fuel cell ion transmission layer

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Experimental program
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Effect test

Embodiment 1

[0030] (1) Weigh 1g Na 2 CO 3 powder, which is dissolved in a certain amount of deionized water to form a 0.5mol / L sodium carbonate aqueous solution;

[0031] (2) Weigh 9g LSCF powder and add it to Na 2 CO 3 solution, and stirred with a magnetic stirrer for 15 min to make LSCF and Na 2 CO 3 Mix the solution evenly, then put it in a drying oven and dry it at 120°C for 12 hours;

[0032] (3) Grinding the dried mixture with a mortar for 15 minutes, and putting it into a muffle furnace for calcination at 700° C. for 1 hour;

[0033] (4) The calcined LSCF / Na 2 CO 3 The composite material is fully ground again. Weigh 0.35g LSCF / Na 2 CO 3 The composite material is used as the functional layer of the battery, sandwiched between two Ni-NCAL electrode layers to form a sandwich structure, and pressed into a ceramic battery by a hydraulic press with a pressure of 9MPa;

[0034] (5) Install the battery on the test fixture, put it into the test furnace and calcine at 550°C for 30...

Embodiment 2

[0036] Make Na with reference to embodiment 1 2 CO 3 Ceramic batteries with content of 5%, 20%, 30%, and 40%. see test results figure 1 .

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Abstract

The invention discloses a preparation method of an LSCF / Na2CO3 nanocomposite as a fuel cell ion transmission layer. The preparation method comprises steps as follows: Na2CO3 accounting for 5%-40% of total amount of LSCF / Na2CO3 is dissolved in water, and an aqueous solution with concentration being 0.5 mol / L is prepared; LSCF accounting for 60%-95% of total weight of LSCF / Na2CO3 is added to the Na2CO3 solution, stirring is performed for 15 min by a magnetic stirrer, and the two materials are stirred sufficiently; a compound is put in an electrothermal blowing drying box and dried for 12 h at 120 DEG C; the dried compound is ground for 15 min and then calcined for 1 h at 700 DEG C in a muffle furnace, and the LSCF / Na2CO3 nanocomposite is obtained. A fuel cell assembled by the composite as the ion transmission layer shows good power output. The preparation method of the material is simple and easy to operate, and the material sintering temperature is lower; material cost and material preparation cost are low, and compression moulding of the composite is easy.

Description

Technical field: [0001] The invention belongs to the field of solid oxide fuel cells, utilizing La 0.6 Sr 0.4 co 0.2 Fe 0.8 o 3-δ (LSCF) / Na 2 CO 3 The composite material is used as an ion transport layer to construct a fuel cell, and the Na in the composite material 2 CO 3 The amount is optimized. Background technique: [0002] Solid oxide fuel cell (solid oxide fuel cell, SOFC) is an all-solid-state electrochemical power generation device that directly converts the chemical energy of hydrogen into electrical energy, with high energy conversion efficiency (up to 50% to 80%), no noise and less environmental pollution. A traditional fuel cell structure consists of three components: cathode, anode, and electrolyte. The electrolyte is the core component of the device, which can determine the type of device, operating temperature and final energy conversion efficiency. Yttrium-stabilized zirconia (YSZ), as the most successful electrolyte material, has dominated the dev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/1016
CPCH01M8/1016Y02E60/50
Inventor 汪宝元陈颖王浩朱斌聂西宇
Owner HUBEI UNIV