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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Problems solved by technology

However, the preparation process of graphene is complicated, large-scale production cannot be re

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

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[0029] Example 1

[0030] The sawdust of the biomass raw material Chinese fir is washed, dried and crushed, and then passed through a 50-mesh sieve, and the under sieve is taken. The Chinese fir sawdust was immersed in a 10wt% KOH solution for 24 hours according to an alkali-carbon ratio of 4:1 and dried at 60°C to remove water. Put the dipped cedar sawdust in the crucible furnace, 2 Sintered at 800°C for 2h in an atmosphere, washed with water, and dried at 60°C; take 10g of the carbonized sample and soak it in 100mL 2% ferric nitrate solution for 24h, then place it in a tube furnace in N 2 Under the atmosphere, the temperature is raised to 900℃, and CO is introduced 2 Gas activation for 1h, CO 2 The gas flow rate is 50mL.min -1 . Such as figure 1 The bio-carbon positive electrode shown has a certain pore structure, which can accommodate insoluble lithium peroxide produced during the discharge process. figure 2 The lithium-air battery assembled with the positive electrode mater...

Example Embodiment

[0031] Example 2

[0032] The ginkgo shells are washed, dried, crushed and passed through a 50-mesh sieve. According to the alkali-carbon ratio of 2:1, the ginkgo shells were immersed in a 15wt% NaOH solution for 24h, filtered and dried. The above-mentioned immersed ginkgo shells were carbonized in a crucible furnace at 800°C for 2h in an Ar atmosphere, weighed 10g of the carbonized material, immersed in 100ml of 3% iridium nitrate solution for 36h, filtered and dried and activated at 800°C in a tubular furnace 2h, the activated gas is water vapor, and the gas flow rate is 50mL.min -1 .

Example Embodiment

[0033] Example 3

[0034] The corncob is washed, dried, crushed and passed through a 50-mesh sieve. The corncob was immersed in a 10wt% KOH solution for 24h according to the ratio of alkali to carbon of 4:1, filtered and dried, placed in a crucible furnace, and carbonized at 700℃ for 2h under Ar atmosphere. Soaked in nickel solution for 48h, filtered and dried, placed in a tube furnace, at 900 ℃ 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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