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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: 2015-04-01
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

The researchers prepared PtAu / C and used it as the positive electrode material to obtain high energy efficiency. However, due to the selection of noble metals, the cost of the battery is bound to increase

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

Embodiment 1

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

[0033]Electrode material and PTFE (mass ratio 8:1), stirred in ethanol, ultrasonically oscillated and mixed evenly to obtain a paste mixture, obtained electrode pancakes by rolling method, punched into 2cm 2 The disc was cold-pressed with a nickel mesh and dried to prepare an electrode.

[0034] Use a 2016 button battery case as the battery package, place the lithium sheet, the electrolyte diaphragm ma...

Embodiment 2

[0038] Accurately weigh 300mg of XC-72 carbon powder, add 100g of deionized water and stir until completely dispersed, then use 0.1M hydrochloric acid aqueous solution to adjust the pH value of the suspension to 5. To the above reaction system, add 5ml of KMnO with a concentration of 0.1M 4 and 2ml of 0.1M FeCl 3 mixed solution, stir to mix evenly. Condensation and reflux in an oil bath at 60°C for 5 hours, suction filtration and washing, vacuum drying at 80°C for 24 hours, and heat treatment of the sample at 300°C for 3 hours to obtain manganese-iron oxides supported on XC-72.

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

Embodiment 3

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

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

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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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Patent Type & Authority Patents(China)
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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