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Preparation method of lithium ion battery cathode GO-PANI-Ni3S2 composite material

A lithium-ion battery and composite material technology, which is applied in the field of preparation of lithium-ion battery anode GO-PANI-Ni3S2 composite materials, can solve the problems of limiting high-power field applications, not being suitable for fast charging and discharging, and low charging and discharging efficiency. Improve the performance of lithium-ion batteries, improve the specific capacity and rate performance, and the effect of high rate charge and discharge capacity

Inactive Publication Date: 2016-12-07
上海德朗能动力电池有限公司 +2
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  • Abstract
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  • Claims
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Problems solved by technology

[0003] At present, the commercial lithium-ion battery anode material is mainly graphite, and its theoretical specific capacity is 372mAh / g, which limits the further improvement of its capacity, resulting in low charge and discharge efficiency, and the interaction with the electrolyte, there is an obvious voltage hysteresis
At the same time, because its lithium intercalation method is generally cross-section embedding, it is not suitable for fast charging and discharging, which limits its application in high-power fields.

Method used

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  • Preparation method of lithium ion battery cathode GO-PANI-Ni3S2 composite material

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Embodiment 1

[0021] A kind of lithium ion battery negative pole GO-PANI-Ni of the present invention 3 S 2 The preparation method of composite material, the steps are as follows:

[0022] Add 0.3ml of aniline and 10mg of sodium lauryl sulfate into 50ml of water for ultrasonic dispersion, mix the dispersed aniline solution with 60ml (0.5mg / ml) of GO dispersion, and continue ultrasonication for 15min to form a stable and uniform mixture solution, stirred in an ice-water bath, and then acidified 0.7g of ammonium persulfate with 50ml (1mol / L) HCl, the solution gradually turned dark green, kept stirring in an ice-water bath for 12 hours, and then the obtained solution was centrifuged and washed 3 times with water to obtain a gel Then ultrasonically disperse it in 180ml of water, add 10ml (1mol / L) HCl dropwise to it, and slowly add 600mg of nickel acetate tetrahydrate dropwise while ultrasonicating, then stir it at room temperature for 1 hour, and then add In a hydrothermal kettle, react at 180...

Embodiment 2

[0024] A kind of lithium ion battery negative pole GO-PANI-Ni of the present invention 3 S 2 The preparation method of composite material, the steps are as follows:

[0025] Add 0.2ml of aniline and 8mg of sodium lauryl sulfate into 50ml of water for ultrasonic dispersion, mix the dispersed aniline solution with 30ml (0.5mg / ml) of GO dispersion, and continue ultrasonication for 15min to form a stable and uniform mixture solution, stirred in an ice-water bath, and then acidified 0.35g of ammonium persulfate with 25ml (1mol / L) HCl, the solution gradually turned dark green, kept stirring in an ice-water bath for 12 hours, and then the obtained solution was centrifuged and washed 3 times with water to obtain a gel Then, ultrasonically disperse it in 90ml of water, add 5ml (1mol / L) HCl dropwise, and slowly add 300mg of nickel acetate tetrahydrate dropwise while ultrasonicating, then stir it at room temperature for 1 hour, and then add In a hydrothermal kettle, react at 180°C for ...

Embodiment 3

[0027] A kind of lithium ion battery negative pole GO-PANI-Ni of the present invention 3 S 2 The preparation method of composite material, the steps are as follows:

[0028] Add 0.1ml of aniline and 6mg of sodium lauryl sulfate into 50ml of water for ultrasonic dispersion, mix the dispersed aniline solution with 20ml (0.5mg / ml) of GO dispersion, and continue ultrasonication for 10min to form a stable and uniform mixture solution, stirred in an ice-water bath, and then acidified 0.5g of ammonium persulfate with 50ml (1mol / L) HCl, the solution gradually turned dark green, kept stirring in an ice-water bath for 10 hours, and then the obtained solution was centrifuged and washed 3 times with water to obtain a gel Among them, during the ultrasonic and stirring process, keep the water temperature at 0-5°C; then ultrasonically disperse it in 180ml water, add 10ml (1mol / L) HCl dropwise, and slowly add 430mg tetrahydrate while ultrasonically Nickel acetate, then stir it at room tempe...

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Abstract

The invention relates to a preparation method of a lithium ion battery cathode GO-PANI-Ni3S2 composite material. The preparation method comprises the following steps of: carrying out uniform ultrasonic dispersion on graphene oxide; respectively adding lauryl sodium sulfate water solution and aniline to carry out mixing; carrying out ultrasonic treatment to form stable and uniform mixed liquid; carrying out ice-water bath stirring and adding, drop by drop, ammonium persulfate which is acidized by hydrochloric acid; and carrying out ice-water bath stirring for 12 hours to obtain deep green solution; centrifuging and washing the deep green solution to obtain a gelatinous substance; ultrasonically dispersing the gelatinous substance in hydrochloric acid solution; dropwise adding nickel acetate tetrahydrate water solution into the hydrochloric acid solution and carrying out uniform ultrasonic processing; stirring the mixture at room temperature for 1 hour; carrying out hydrothermal treatment at 180 DEG C for 12 hours; adding sodium sulfide nonahydrate water solution; and carrying out centrifugation, washing and freeze-drying to obtain the lithium ion battery cathode material. Compared with the prior art, the composite cathode material has good cycle performance and high-magnification charging-discharging capacity, so that the performance of lithium ion batteries which take the material as a cathode material is improved.

Description

[technical field] [0001] The invention relates to the technical field of lithium ion battery negative electrode materials, in particular to a lithium ion battery negative electrode GO-PANI-Ni 3 S 2 Methods of preparation of composite materials. [Background technique] [0002] Lithium-ion secondary batteries have excellent characteristics such as relatively high voltage, capacity, cycle and energy density, and lithium-ion batteries have high voltage, high energy density, good cycle performance, small self-discharge, no memory effect, It is favored by people for its wide working range and other advantages, and it is called the leading power supply in the 21st century. [0003] At present, the commercial lithium-ion battery anode material is mainly graphite, and its theoretical specific capacity is 372mAh / g, which limits the further improvement of its capacity, resulting in low charge and discharge efficiency, and the interaction with the electrolyte. voltage hysteresis. At...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/0525
CPCH01M4/366H01M4/5815H01M4/625H01M10/0525Y02E60/10
Inventor 韩生刘金宝韦焕明刘益林蔺华林艾亚妮李飞陈红艳喻宁波余伟萍
Owner 上海德朗能动力电池有限公司
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