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
  • Description
  • Claims
  • Application Information

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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

Method used

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