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Lithium ion ternary nanosheet as well as preparation method and application thereof

A lithium ion, nanosheet technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problem that ammonium bicarbonate material is harmful to human body, cannot be directly discharged into sewers, and is harmful to the environment. problem, to achieve the effect of improving electrochemical performance, good market prospect and low price

Active Publication Date: 2021-06-11
CIVIL AVIATION FLIGHT UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ammonium bicarbonate material in this method is very harmful to the human body, can cause blindness, pulmonary edema and other symptoms, releases irritating ammonia when it is damp, and is harmful to water bodies and cannot be directly discharged into the sewer, and it is difficult to handle, which is harmful to the environment.

Method used

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  • Lithium ion ternary nanosheet as well as preparation method and application thereof
  • Lithium ion ternary nanosheet as well as preparation method and application thereof
  • Lithium ion ternary nanosheet as well as preparation method and application thereof

Examples

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Embodiment 1

[0030] First, dissolve 8mmol potassium nickel cyanide in 400ml deionized water, stir magnetically until solution A is completely dissolved, then dissolve 4mmol cobalt acetate tetrahydrate, 4mmol iron acetate tetrahydrate, and 3mmol sodium citrate in 400ml deionized water, and stir magnetically Until solution B is completely dissolved, then slowly add solution A to solution B, stir for 30 minutes, then let the sample stand at room temperature for 24 hours, filter with suction, collect the sample and wash it several times with deionized water and ethanol, and finally Dry in a vacuum oven at 60° C. for 5 hours to obtain dry powder. Heat the powder in a tube furnace filled with nitrogen at 1°C / min, keep it warm for 1 hour when the temperature rises to 450°C, and then put the powder in a muffle furnace to raise the temperature at 1°C / min, and hold it for 0.5 Calcination was carried out for 2 hours to obtain the final sample.

[0031] figure 1 For the X-ray diffraction pattern of ...

Embodiment 2

[0034] First, dissolve 8mmol potassium nickel cyanide in 400ml deionized water, stir magnetically until solution A is completely dissolved, then dissolve 4mmol cobalt chloride, 4mmol ferric chloride, and 3mmol sodium citrate into 400ml deionized water, and stir magnetically until completely Dissolve solution B, then slowly add solution A to solution B, stir for 30 minutes, then let the sample stand at room temperature for 24 hours, filter with suction, collect the sample and wash it several times with deionized water and ethanol, and finally vacuum Dry in a drying oven at 60° C. for 5 hours to obtain a dry powder. Heat the powder in a tube furnace filled with nitrogen at 2°C / min, heat it up to 450°C for 1 hour for calcination, then place the powder in a muffle furnace to heat up at 3°C / min, heat it up to 300°C for 0.5 Calcination was carried out for 2 hours to obtain the final sample.

Embodiment 3

[0036] First dissolve 8mmol nickel potassium cyanide in 400ml deionized water, stir magnetically until solution A is completely dissolved, then dissolve 4mmol cobalt sulfate, 4mmol iron sulfate, and 3mmol sodium citrate into 400ml deionized water, stir magnetically until the solution is completely dissolved B, then slowly add solution A to solution B, stir for 30 minutes, then let the sample stand at room temperature for 48 hours, filter with suction, collect the sample and wash it several times with deionized water and ethanol, and finally put it in a vacuum oven Dry at 60°C for 5 hours to obtain dry powder. The powder is heated in a tube furnace filled with nitrogen at 2°C / min, and when the temperature is raised to 400°C, it is kept for 1 hour for calcination, and then the powder is placed in a muffle furnace to be heated at 2°C / min. Calcination was carried out for 2 hours to obtain the final sample.

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Abstract

The invention provides a lithium ion ternary nanosheet as well as a preparation method and application thereof. The preparation method comprises the following steps of: dissolving nickel potassium cyanide into deionized water to obtain a solution A; dissolving a soluble cobalt salt, a soluble ferric salt and trisodium citrate into deionized water to obtain a solution B; slowly adding the solution A into the solution B, stirring for 30 minutes, and standing at room temperature; performing suction filtration to collect a product, and washing the product with deionized water and ethanol; drying the product in a vacuum drying oven at 60-80 DEG C for 5 hours; calcining the powder in a tubular furnace filled with nitrogen; and calcining the powder in a muffle furnace to obtain a final product. The preparation method provided by the invention is rich in raw material resource, low in price, simple and convenient to operate and easy for industrial production. The prepared ternary metal oxide is of a nanosheet structure, so that volume expansion caused in the charging and discharging process is effectively relieved, the transmission distance of lithium ions is shortened, and the electrochemical performance of a lithium battery is greatly improved.

Description

technical field [0001] The invention relates to the technical field of designing lithium battery materials, in particular to lithium ion ternary nanosheets and their preparation methods and applications. Background technique [0002] The increasingly serious global environmental pollution and energy crisis are widely concerned by various countries, so it is urgent to develop a new green energy storage or conversion device, such as secondary batteries, supercapacitors and water separation. In particular, lithium-ion batteries (LIBs) have been widely used in mobile phones, laptops, cameras and other portable electronic devices due to their high energy density and outstanding cycle performance, and have rapidly developed into one of the most important energy storage devices. At the same time, lithium-ion batteries also have other advantages such as low environmental pollution and high voltage, and are considered to be the most potential energy storage devices to solve the energ...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/525H01M4/62H01M10/0525B82Y30/00B82Y40/00
CPCH01M4/362H01M4/525H01M4/62H01M4/628H01M10/0525B82Y40/00B82Y30/00Y02E60/10
Inventor 王海斌郑永军王茂华瞿忱陈现涛贾井运孙强
Owner CIVIL AVIATION FLIGHT UNIV OF CHINA
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