Electrode material for lithium-air battery and preparation method of electrode material

An electrode material, air battery technology, applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problem of increasing battery cost, achieve the effect of reducing battery cost and improving utilization rate

Active Publication Date: 2013-04-17
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

The researchers prepared PtAu/C and used it as the positive electrode material to obtain high energy e

Method used

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  • Electrode material for lithium-air battery and preparation method of electrode material
  • Electrode material for lithium-air battery and preparation method of electrode material

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0031] Example 1

[0032] Accurately weigh 200 mg of KB600 carbon powder, add 100 g of deionized water and stir until it is completely dispersed, and then adjust the pH of the suspension to 10 with a 0.1M aqueous sodium hydroxide solution. To the above reaction system, add 10ml KMnO with a concentration of 0.1M 4 And 1ml of 0.1M H 2 PtCl 6 The mixed solution, stir and mix well. Condensate and reflux in an oil bath at 60°C for 5 hours. After washing by suction, vacuum drying at 80°C for 24 hours, heat treatment at 350°C for 4 hours to obtain KB600-supported manganese platinum oxide compound.

[0033] Electrode material and PTFE (mass ratio 8:1), stir in ethanol, ultrasonically oscillate and mix uniformly to obtain a paste mixture. The electrode pancake is obtained by roller pressing and punched into 2cm 2 The wafer is cold pressed with the nickel mesh and dried to prepare the electrode.

[0034] Using the 2016 button battery case as the battery package, place the lithium sheet, the e...

Example Embodiment

[0037] Example 2

[0038] Accurately weigh 300 mg of XC-72 carbon powder, add 100 g of deionized water and stir until it is completely dispersed, and then adjust the pH of the suspension to 5 with a 0.1M aqueous hydrochloric acid solution. To the above reaction system, add 5ml KMnO with a concentration of 0.1M 4 And 2ml FeCl with a concentration of 0.1M 3 The mixed solution, stir and mix well. Condensate and reflux in an oil bath at 60°C for 5 hours. After washing by suction, vacuum dry at 80°C for 24 hours, and heat the sample at 300°C for 3 hours to obtain XC-72-supported manganese iron oxide compound.

[0039] The electrode was prepared by the method of Example 1, and the battery was assembled for performance evaluation.

Example Embodiment

[0040] Example 3

[0041] Accurately weigh 300 mg of carbon nanotubes, add 100 g of deionized water and stir until they are completely dispersed, and then adjust the pH of the suspension to 6 with a 0.1M aqueous hydrochloric acid solution. To the above reaction system, add 6ml KMnO with a concentration of 0.1M 4 And 2ml of 0.1M Co(NO 3 ) 2 The mixed solution, stir and mix well. The reaction was carried out for 5 hours in an ultrasonic environment, and the reaction temperature was constant at 30°C. After washing by suction, vacuum drying at 80°C for 24 hours, and heat treatment of the sample at 350°C for 3 hours to obtain manganese-cobalt-oxygen compounds supported by carbon nanotubes.

[0042] The electrode was prepared by the method of Example 1, and the battery was assembled for performance evaluation.

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Abstract

The invention relates to an electrode material for a lithium-air battery and a preparation method of the electrode material. The electrode material comprises a carbon material and a manganese-containing oxide MnXO loaded on the surface of the carbon material, wherein the mass percent of the MnXO in the electrode material is 1-80 percent, X is one or more than two metal elements, and the total mol ratio of the Mn to the X metal elements is (0.5-10):1. According to the electrode material prepared by adopting the preparation method, because active components of a catalyst are uniformly dispersed on the surface of the carbon material, the interface electrochemical reaction can be maximally catalyzed; and the manganese-containing oxide is adopted as a two-effect catalyst, so that the battery cost is effectively reduced while the catalysis activity of a doped component is fully developed.

Description

technical field [0001] The invention relates to the field of key materials for lithium secondary batteries, in particular to an electrode material for a lithium-air battery and a preparation method thereof. Background technique [0002] With the rapid development of electronics, communication equipment and electric vehicles, people put forward higher requirements for battery performance. A lithium-air battery is a secondary battery that uses metallic lithium as the negative electrode and an air electrode as the positive electrode. Metal lithium as the negative electrode material has the lowest theoretical voltage, and its theoretical specific capacity is as high as 3,862mAh / g, while oxygen as the positive electrode active material can be obtained directly from the air. Therefore, lithium-air batteries have extremely high specific capacity and specific capacity. energy. Taking lithium as the standard, its theoretical specific energy density can reach 11,140Wh / Kg, and its ac...

Claims

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Application Information

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IPC IPC(8): H01M4/62H01M4/38
CPCY02E60/10
Inventor 张华民张益宁李婧王美日王倩
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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