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Anode material for lithium-air battery and preparation method thereof

A lithium-air battery and cathode material technology, which is applied in battery electrodes, fuel cell-type half-cells and secondary battery-type half-cells, circuits, etc. Graphene preparation process is complicated and other problems, to achieve the effect of low price, high specific capacity and abundant sources

Inactive Publication Date: 2014-02-12
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

However, the preparation process of graphene is complicated, large-scale production cannot be realized, and the price is expensive, which is not suitable for large-scale commercial application.

Method used

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  • Anode material for lithium-air battery and preparation method thereof
  • Anode material for lithium-air battery and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Wash, dry and pulverize the biomass raw material Chinese fir sawdust and pass it through a 50-mesh sieve, and take the part under the sieve. The fir sawdust was soaked in 10wt% KOH solution for 24 hours according to the alkali-carbon ratio of 4:1, and dried at 60°C to remove water. Put the impregnated Chinese fir sawdust in the crucible furnace, under N 2 Sinter at 800°C for 2h in the atmosphere, wash with water, and dry at 60°C; take 10g of the carbonized sample and dip it in 100mL of 2% ferric nitrate solution for 24h, dry it and place it in a tube furnace under N 2 The temperature was raised to 900°C under the atmosphere, and CO 2 Gas activation 1h, CO 2 The gas flow rate is 50mL.min -1 . Such as figure 1 The shown biochar cathode has a certain pore structure that can accommodate insoluble lithium peroxide generated during discharge. figure 2 The lithium-air battery assembled with the positive electrode material of the present invention exhibits a large specif...

Embodiment 2

[0032] Ginkgo biloba shells are washed, dried, crushed and passed through a 50-mesh sieve. Ginkgo shells were soaked in 15wt% NaOH solution for 24 hours according to the alkali-carbon ratio of 2:1, and then filtered and dried. Carbonize the impregnated ginkgo shells in a crucible furnace at 800°C for 2h under Ar atmosphere, weigh 10g of carbonized material, dip in 100ml of 3% iridium nitrate solution for 36h, filter and dry, activate in a tube furnace at 800°C 2h, the activation gas is water vapor, the gas flow rate is 50mL.min -1 .

Embodiment 3

[0034] The corncobs are washed, dried and crushed and passed through a 50-mesh sieve. Immerse corncobs in 10wt% KOH solution for 24 hours according to the alkali-carbon ratio of 4:1, filter and dry them, place them in a crucible furnace, and carbonize them at 700°C for 2 hours under an Ar atmosphere. Immerse in nickel solution for 48 hours, filter and dry, then place in a tube furnace at 900°C CO 2 Activated for 1h under the condition of activated gas, CO 2 The flow rate is 70mL.min -1 .

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Abstract

The invention relates to an anode material for a lithium-air battery and a preparation method thereof. Through alkaline activation and catalytic activation, the anode material is prepared from a biomass carbon material. The anode material has a specific surface area of 800-2000m<2>.g<-1>, total pore volume of 0.8-2cm<3>.g<-1> and a ratio of mesoporous volume to total pore volume of 30-90%. The lithium-air battery prepared from the anode material has good discharge performances and has the advantages of simple processes, good technology repeatability, low cost and environmental friendliness.

Description

technical field [0001] The invention relates to an electrode material and a preparation method thereof, in particular to a positive electrode material for a lithium-air battery and a preparation method thereof Background technique [0002] Energy and the environment are two major issues facing mankind in the 21st century. With the continuous development of economy and society, the human demand for energy is increasing day by day. It is estimated that by 2050, human demand for energy will double and triple by the end of this century. On the one hand, traditional fossil energy reserves are limited and cannot meet the needs of social development. On the other hand, excessive consumption of fossil energy has brought serious environmental problems. In order to solve the dual problems of energy shortage and environmental pollution, the development of renewable clean energy is very important. Among them, lithium-ion batteries lead the development of the battery industry with the...

Claims

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Application Information

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IPC IPC(8): H01M4/96H01M4/88H01M12/08
CPCY02E60/50H01M4/9083H01M4/96H01M12/08Y02E60/10
Inventor 张华民聂红娇刘涛张益宁李婧
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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