LiCoO2 type cathode with multiple-structure and its preparation method

A duplex structure, cathode technology, applied in structural parts, battery electrodes, fuel cells, etc., can solve the problem that an effective method for improving the conductivity of LiCoO2 cathode has not been proposed, and achieve the effect of avoiding harsh requirements, increasing ohmic contact, and improving battery performance.

Inactive Publication Date: 2003-02-05
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] However, the above reports have not proposed to improv

Method used

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  • LiCoO2 type cathode with multiple-structure and its preparation method
  • LiCoO2 type cathode with multiple-structure and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] In a 1 liter ball mill jar, add ceramic balls 1 / 3 of the volume of the ball mill jar. Weigh 30.03 g of Co(NO 3 ) 2 6H 2 O, 4.15 g Li 2 CO 3 , 0.36 g of MgO was added to the ball mill jar and ball milled for 30 hours. Then dry in an oven at 120°C, mechanically pulverize, grind, gradually increase the temperature in a muffle furnace from 100°C to 800°C, and roast for 20 hours to obtain LiCo 0.92 Mg0.08 o 2 Powder.

Embodiment 2

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

Embodiment 3

[0069] Embodiment 3 In a 1 liter ball mill jar, add ceramic balls of 1 / 3 the volume of the ball mill jar. Take by weighing 25.6 grams of LiCo prepared in Example 1 0.92 Mg 0.08 o 2 Powder, 4.2 grams of PVB, 2.4 grams of dioctyl phthalate, 2.5 grams of paraffin, 1 gram of fish oil, 0.4 grams of silicone oil, 1.5 grams of glycerin, 80 grams of ethanol-n-butanol solvent, add in the ball mill jar, ball mill for 30 Hour. The slurry was divided into two parts, one part was added with 1.0 g of carbon black, and after ball milling for 20 hours, it became a cathode slurry with a fine-pore structure; the other part was added with 1.5 g of carbon black, and ball-milled for 15 hours to become a cathode slurry with a coarse-pore structure. Filter the slurry with a 100-mesh stainless steel mesh, and remove air bubbles in the slurry for 15 minutes at a vacuum of 0.09 MPa and a stirring speed of 30 rpm. The degassed cathode slurry with fine pore structure and the cathode slurry with coars...

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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 fuel cell cathode and a preparation method thereof, in particular to a molten carbonate fuel cell (MCFC) cathode and a preparation method thereof. Background technique [0002] A fuel cell is a power generating device that directly converts the chemical energy in fuel and oxidant into electrical energy. It does not go through the heat engine process, so it is not limited 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 operating at 600-700 ° C. In addition to its characteristics of not being limited by the Carnot cycle, high energy utilization rate and environmental friendliness, it also has many other types of fuel cells that cannot Comparable advantages, such as a wide range of fuels, except for H 2 In addition to , CO, natural gas, coal gasific...

Claims

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Application Information

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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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