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Nickel-cobalt oxide electrode material as well as preparation method and applications thereof

A technology of electrode materials and oxides, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of high electrolyte selectivity, poor high-current discharge performance, and low theoretical capacity of graphite materials, achieving excellent charge and discharge performance, The effect of simple process and wide source of raw materials

Inactive Publication Date: 2015-05-27
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to factors such as low theoretical capacity of graphite materials, high selectivity to electrolyte, and poor high-current discharge performance, people have been working hard to find new materials that can replace it.

Method used

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  • Nickel-cobalt oxide electrode material as well as preparation method and applications thereof
  • Nickel-cobalt oxide electrode material as well as preparation method and applications thereof
  • Nickel-cobalt oxide electrode material as well as preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 50mmol of Ni(NO 3 ) 2 ·6H 2 O and 50mmol of Co(NO 3 ) 2 ·6H 2 O mix well, add 80mL distilled water, fully stir for 1 hour, then add 30mL methanol and 1g polyvinylpyrrolidone (PVP), fully stir for 1 hour; then add 20g of urea, mix well and pour into 100mL reaction kettle, Keep at 120°C for 10 hours; after the reaction, cool down to room temperature naturally, wash with a large amount of distilled water, dry in a blast drying oven at 80°C to form a solid powder, put the powder into a muffle furnace, and heat at a speed of 5°C / min to 350°C, and then keep it warm for 2 hours to obtain the nickel-cobalt oxide electrode material. The electrode material topography figure that embodiment 1 prepares is as follows figure 1 (a) and figure 1 (b) shown.

Embodiment 2

[0032] 150mmol of Ni(NO 3 ) 2 ·6H 2 O and 150mmol of Co(NO 3 ) 2 ·6H 2 O mix well, add 80mL distilled water, stir well for 1 hour, then add 80mL methanol and 5g polyvinylpyrrolidone, stir well for 1 hour; then add 30g urea, mix well, pour into 100mL reaction kettle, keep at 180°C for 24 Hours; after the reaction, cool down to room temperature naturally, wash with a large amount of distilled water, and dry it into a solid powder in a blast drying oven at 80°C, put the powder into a muffle furnace, and heat up to 350 ℃, and then keep it warm for 2 hours to obtain the nickel-cobalt oxide electrode material.

[0033] The electrode material topography figure that embodiment 2 prepares is as figure 2 (a) and figure 2 (b) shown. After being made into a battery, the first three charge and discharge data of the material are as follows: image 3 (a) and image 3 (b) shown. image 3 (a) is the first three charge and discharge data at 100mA / g charge and discharge current dens...

Embodiment 3

[0035] 100mmol of Ni(NO 3 ) 2 ·6H 2 O and 100mmol of Co(NO 3 ) 2 ·6H 2 O mix evenly, add 80mL of distilled water, fully stir for 1 hour, then add 50mL of methanol and 3g of polyvinylpyrrolidone, fully stir for 1 hour, then add 25g of urea, mix well, pour into a 100mL reaction kettle, and keep at 160°C for 18 Hours; after the reaction, cool down to room temperature naturally, wash with a large amount of distilled water, dry into solid powder in a blast drying oven at 80°C, put the powder into a muffle furnace, and heat up to 350°C at a speed of 5°C / min. ℃, and then keep it warm for 2 hours to obtain the nickel-cobalt oxide electrode material.

[0036] The electrode material topography figure that embodiment 3 prepares is as Figure 4 (a), Figure 4 (b) and Figure 4 (c) shown. The cycle performance test after making the battery is as follows: Figure 5 (a) and Figure 5 (b) shown. According to the test results, under the current density of 100mA / g, the first dischar...

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Abstract

The invention discloses a nickel-cobalt oxide electrode material as well as a preparation method and applications thereof. The nickel-cobalt oxide electrode material is NiCo2O4 oxide prepared by adopting a hydrothermal method. The method concretely comprises the following steps: adding nickel nitrate (Ni(NO3)2.6H2O) and cobalt nitrate (Co(NO3)2.6H2O) into distilled water and fully mixing, adding urea and methanol to provide hydroxyl groups, and adding PVP as a complexing agent, and reacting in a reaction kettle to obtain NiCo2O4 oxide. Different material shapes can be obtained by adopting different reaction parameters, so that different lithium ion battery performances can be realized. The method has the advantages of being simple in technology, wide in the sources of raw materials, capable of performing large-scale production, and the like. The first discharge capacity of the lithium ion battery cathode material prepared from the material can achieve 2000mAh / g, the capacity has no obvious change after being circulated for 20 times, and the charging and discharging performances are excellent. By adopting the lithium ion battery prepared, the capacity is high, the cyclic performance is good and the lithium ion battery can be used for industrial production.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a nickel cobalt oxide electrode material and a preparation method and application thereof. Background technique [0002] As a new type of green battery, lithium-ion batteries have the advantages of high voltage, high specific energy, long charge and discharge life, no memory effect, little environmental pollution, fast charging, and low self-discharge rate, and are widely used in various aspects of life. A variety of electrical facilities and appliances, such as portable small appliances such as laptop computers, mobile phones, and digital cameras. At present, more and more attention has been paid to the application of lithium-ion batteries in large-scale power batteries (such as electric vehicle batteries, electric bicycle batteries, etc.), and the main purpose of the research is to improve safety performance, increase energy density and adaptability to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/525
CPCY02E60/10
Inventor 潘春旭龚佑宁黎德龙余超智张豫鹏
Owner WUHAN UNIV
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