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High performance urchin-like nickel oxide/nickel cobaltate microsphere lithium oxygen battery positive pole catalytic material and preparation method thereof

A lithium-oxygen battery and catalytic material technology, applied in battery electrodes, fuel cell-type half-cells and secondary battery-type half-cells, circuits, etc., to achieve good practical application value, good repeatability, and transportation. Effect

Inactive Publication Date: 2018-09-04
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, so far there are few reports on the research on the composite of nickel cobaltate and nickel oxide.

Method used

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  • High performance urchin-like nickel oxide/nickel cobaltate microsphere lithium oxygen battery positive pole catalytic material and preparation method thereof
  • High performance urchin-like nickel oxide/nickel cobaltate microsphere lithium oxygen battery positive pole catalytic material and preparation method thereof
  • High performance urchin-like nickel oxide/nickel cobaltate microsphere lithium oxygen battery positive pole catalytic material and preparation method thereof

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preparation example Construction

[0035] In a specific embodiment of the present invention, a kind of preparation method of nickel oxide / nickel cobaltate microsphere material is provided, comprising steps as follows:

[0036] S1. Prepare the reaction solution: dissolve cobalt chloride, nickel chloride and urea in water to obtain the reaction solution;

[0037] S2. Prepare the solid-phase precursor: react the reaction solution prepared in S1. at 120-180°C for 12-36 hours, and purify the solid-phase precursor after the reaction;

[0038] S3. Preparation of nickel oxide / nickel cobaltate microsphere material: put the solid-phase precursor prepared in S2. at 300-500°C for 4-6 hours for calcination, and obtain the nickel oxide / nickel cobaltate microsphere material after the reaction;

[0039] In yet another specific embodiment of the present invention, in the step S1., the molar ratio of cobalt chloride, nickel chloride and urea is 1:2:4-6; further, the cobalt chloride, nickel chloride The molar ratio of cobalt chlor...

Embodiment 1

[0051] Sea urchin-shaped nickel oxide / nickel cobaltate microspheres are prepared through the following steps:

[0052] (1) Preparation of reaction solution

[0053] Dissolve 2mmol nickel chloride, 4mmol cobalt chloride and 10mmol urea in 75mL deionized water, stir and sonicate for 1 hour to form a rose-red mixed solution;

[0054] (2) Preparation of solid phase precursor

[0055] Transfer the solution prepared in step (1) to a 100mL polytetrafluoroethylene liner for high temperature and high pressure hydrothermal reaction. The reaction temperature is controlled at 150°C and the reaction time is controlled at 24h. After fully reacting, cool to room temperature and use The reaction product was centrifuged and washed with ionized water and ethanol, and the solid-phase precursor was obtained after vacuum drying at 120°C for 24 hours;

[0056] (3) Subsequent heat treatment

[0057] Place the precursor collected in step (2) in a muffle furnace, in an air atmosphere, at 5°C min -...

Embodiment 2

[0062] Sea urchin-shaped nickel oxide / nickel cobaltate microspheres are prepared through the following steps:

[0063] (1) Preparation of reaction solution

[0064] Dissolve 2mmol nickel chloride, 4mmol cobalt chloride and 10mmol urea in 75mL deionized water, stir and sonicate for 1 hour to form a rose-red mixed solution;

[0065] (2) Preparation of solid phase precursor

[0066] Transfer the solution prepared in step (1) to a 100mL polytetrafluoroethylene liner for high temperature and high pressure hydrothermal reaction. The reaction temperature is controlled at 120°C and the reaction time is controlled at 24h. After fully reacting, cool to room temperature and use The reaction product was centrifuged and washed with ionized water and ethanol, and the solid-phase precursor was obtained after vacuum drying at 120°C for 24 hours;

[0067] (3) Subsequent heat treatment

[0068] Place the precursor collected in step (2) in a muffle furnace, in an air atmosphere, at 5°C min -...

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Abstract

The invention provides a high performance urchin-like nickel oxide / nickel cobaltate microsphere lithium oxygen battery positive pole catalytic material and a preparation method thereof. The preparation material is sea urchin-like microspheres with uniform diameters of 3-10 micrometers, and nanoneedle structures are arranged neatly on the surface of the microspheres so that a high specific surfacearea is obtained. The catalytic material can be used for catalysis of a lithium oxygen battery. The urchin-like nickel oxide / nickel cobaltate microsphere material can be applied to the positive pole catalysis of a lithium oxygen battery, has a high specific capacity and excellent cycle stability, is prepared through simple processes of simple hydrothermal reaction and subsequent heat treatment andhas a great industrial production value and a practical application value.

Description

technical field [0001] The invention belongs to the field of electrochemistry and new energy, and in particular relates to a high-performance sea urchin-like nickel oxide / nickel cobalt oxide microsphere lithium-oxygen battery cathode catalyst material and a preparation method thereof. Background technique [0002] With the increasing pollution of the urban environment and the gradual consumption of traditional fossil fuels, people's demand for high energy density and clean energy is increasing day by day. Recently, lithium-oxygen batteries based on organic electrolytes have become a research hotspot in academia due to their relatively simple structure, extremely high theoretical energy density, and low cost. The theoretical energy density of lithium oxygen battery can reach 3505Whkg -1 , is the energy density of traditional lithium-ion batteries (360Wh kg -1 ), so lithium-oxygen batteries have good application prospects as future energy storage devices. However, despite t...

Claims

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Application Information

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IPC IPC(8): H01M4/86H01M4/90H01M12/08
CPCH01M4/8647H01M4/9016H01M12/08Y02E60/10
Inventor 钱磊赵雯王俊赵兰玲尹锐李晓敏黄小帅
Owner SHANDONG UNIV
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