LiCoO2 type cathode with multiple-structure for molten carbonate fuel cell and its preparation method

A technology of molten carbonate and composite structure, which is applied in the direction of fuel cells, battery electrodes, structural parts, etc., can solve the problems that have not yet been proposed to improve the effective method of LiCoO2 cathode conductance, so as to avoid harsh requirements, increase ohmic contact, and improve battery performance. performance effect

Inactive Publication Date: 2004-10-20
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] However, the above reports have not proposed to improve the LiCoO 2 Efficient method for type cathodic conductance

Method used

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  • LiCoO2 type cathode with multiple-structure for molten carbonate fuel cell and its preparation method
  • LiCoO2 type cathode with multiple-structure for molten carbonate fuel cell and its preparation method
  • LiCoO2 type cathode with multiple-structure for molten carbonate fuel cell and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] In a 1 liter ball mill tank, add 1 / 3 of the volume of the ball mill tank. Weigh 30.03 grams of Co(NO 3 ) 2 6H 2 O, 4.15 g Li 2 CO 3, 0.36 grams of MgO, added to the ball milling tank, ball milling for 30 hours. Then it is dried in an oven at 120°C, mechanically crushed, ground, gradually heated from 100°C to 800°C in a muffle furnace, and calcined for 20 hours to obtain LiCo 0.92 Mg 0.08 O 2 Powder.

Embodiment 2

[0068] Prepare LiCo according to the method of Example 1 0.92 Mg 0.08 O 2 Powder. Weigh 20.4 grams of LiCo 0.92 Mg 0.08 O 2 Powder, 5.3 grams Ce(NO 3 ) 3 6H 2 O, 10.5 grams of La(NO 3 ) 3 6H 2 O, add to the ball mill tank and ball mill for 10 hours to obtain powder.

Embodiment 3

[0070] In a 1 liter ball mill tank, add 1 / 3 of the volume of the ball mill tank. Weigh 25.6 grams of LiCo prepared in Example 1 0.92 Mg 0.08 O 2 Powder, 4.2 g of PVB, 2.4 g of di-n-octyl phthalate, 2.5 g of paraffin, 1 g of fish oil, 0.4 g of silicone oil, 1.5 g of glycerin, 80 g of ethanol-n-butanol solvent, add to the ball mill tank, ball mill 30 hour. This slurry was divided into two parts, one part was added with 1.0 g of carbon black and ball milled for 20 hours to become a fine pore structure cathode slurry; the other part was added with 1.5 g of carbon black and ball milled for 15 hours to form a coarse pore structure cathode slurry. Filter the slurry with a 100 mesh stainless steel mesh. Under the conditions of a vacuum of 0.09 MPa and a stirring speed of 30 rpm, the bubbles in the slurry are removed for 15 minutes. The degassed pore structure cathode slurry and the coarse pore structure cathode slurry are respectively placed on a horizontal glass plate covered with a poly...

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Abstract

The LiCoO2 type negative elective electrode possessing the compound structure is prepared from the substrate powder of the negative electrode, the organic matter and the inorganic pore creating materially bu using the strip casting method. The structure formula of the power of the negative electrode is expressed as follows: LiCo1-xMxO2, here M is one or more among earthy elements Be, Mg, Ca or Sr; x is equal to 0.05-0.10. The proportioning by weight between the powder of the negative electrode and the organic matttter as well the inorganic pore creating material is 6:1-3. The invented negative electrodes decrease the solubility of the negative electrode in the molten carbonate greatly and increase stability as well as prolong the service life of the batties. Moreover, the electric conductance of the negative electrodes is increased.

Description

Technical field [0001] The invention relates to a cathode of a fuel cell and a preparation method thereof, in particular to a cathode for a molten carbonate fuel cell (MCFC) and a preparation method thereof. Background technique [0002] A fuel cell is a power generation device that directly converts the chemical energy in the fuel and oxidant into electrical energy. It does not go through the heat engine process, so it is not restricted by the Carnot cycle, and the energy conversion efficiency is very high. At the same time, it is a clean and pollution-free power generation device. Molten Carbonate Fuel Cell (MCFC) is a high-temperature power generation device that operates at 600-700°C. In addition to being not restricted by the Carnot cycle, high energy utilization, and environmentally friendly, it also has many other types of fuel cells that cannot Comparative advantages, such as a wide range of fuel applications, except for H 2 In addition to CO, natural gas, coal gasificati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/48H01M4/525H01M4/58H01M4/62H01M4/86H01M4/88
CPCH01M8/145H01M4/8621H01M4/525Y02E60/526Y02E60/10Y02E60/50
Inventor 周利衣宝廉林化新张华民何长青
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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