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Graphene composite electrode material and preparation method thereof, lead-carbon battery negative electrode lead plaster and preparation method thereof as well as lead-carbon battery

A graphene composite and electrode material technology, applied in lead-acid batteries, battery electrodes, circuits, etc., can solve problems such as difficulty in meeting the requirements of electric vehicles and energy storage backup power sources, poor cycle performance of lead-carbon batteries, and short negative electrode cycle life, etc. question

Inactive Publication Date: 2014-03-26
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the existing lead-carbon batteries, due to the severe sulfation of the negative electrode under high-power conditions, the cycle life of the negative electrode is short, which makes the cycle performance of the lead-carbon battery poor, and it is difficult to meet the needs of electric vehicles and energy storage backup power supplies. requirements

Method used

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  • Graphene composite electrode material and preparation method thereof, lead-carbon battery negative electrode lead plaster and preparation method thereof as well as lead-carbon battery
  • Graphene composite electrode material and preparation method thereof, lead-carbon battery negative electrode lead plaster and preparation method thereof as well as lead-carbon battery
  • Graphene composite electrode material and preparation method thereof, lead-carbon battery negative electrode lead plaster and preparation method thereof as well as lead-carbon battery

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preparation example Construction

[0053] see figure 1 , the preparation method of the graphene composite electrode material of an embodiment, comprises the steps:

[0054] Step S110: preparing nitrogen-doped graphene.

[0055] Place graphite oxide or graphene in an ammonia atmosphere, heat up to 500°C-700°C at a heating rate of 5-15°C / min, react for 0.5-1 hour, and obtain nitrogen-doped graphene after cooling.

[0056] Graphite oxide or graphene can be placed in a horse boiling furnace, and ammonia gas is passed into the horse boiling furnace, and then the temperature is raised to 500°C~700°C for reaction. The flow rate of ammonia is preferably 400mL / min to ensure that graphite oxide or graphene is in full contact with ammonia.

[0057] In other embodiments, graphite oxide or graphene can also be combined with urea (CN 2 h 4 O), ammonium carbonate ((NH 4 ) 2 CO 3 ), ammonium bicarbonate (NH 4 HCO 3 ), ammonium acetate (CH 3 COONH 4 ) and melamine (C 3 h 6 N 6 ) to obtain a mixture, heat the mixtu...

Embodiment 1

[0107] (1) Preparation of nitrogen-doped graphene

[0108] Graphene was put into a horse boiling furnace protected by ammonia gas, the flow rate of ammonia gas was 400mL / min, and the temperature was raised to 500°C at a heating rate of 5°C / min, reacted for 1 hour, and nitrogen-doped graphene was obtained after cooling.

[0109] (2) Preparation of graphene composite electrode material

[0110] Nitrogen-doped graphene is immersed in the lead acetate solution that concentration is 0.2g / mL by the ratio of 1g:107mL, ultrasonic treatment is 0.5 hour, obtains dispersion liquid; It is 100mL:5.4mL to add concentration to dispersion liquid by volume ratio is 1.2 g / mL sulfuric acid solution, stirred and reacted for 0.5 hours to obtain a reaction solution, filtered the reaction solution, and vacuum-dried the filter residue at 60°C for 5 hours to obtain a graphene composite electrode material. The graphene composite electrode material includes nitrogen-doped graphene and adsorption Lead s...

Embodiment 2

[0120] (1) Preparation of nitrogen-doped graphene

[0121] Mix graphene and urea at a mass ratio of 1:1 and put it into a horse boiling furnace, raise the temperature to 700°C at a heating rate of 15°C / min, react for 0.5 hours, and obtain nitrogen-doped graphene after cooling.

[0122] (2) Preparation of graphene composite electrode material

[0123] Immerse nitrogen-doped graphene in a lead acetate solution with a concentration of 0.2g / mL at a ratio of 1g:53mL, and ultrasonically treat it for 1 hour to obtain a dispersion; add a concentration of 1.2 g / mL sulfuric acid solution, stirred and reacted for 1 hour to obtain a reaction solution, filtered the reaction solution, and vacuum-dried the filter residue at 100°C for 2 hours to obtain a graphene composite electrode material. The graphene composite electrode material includes nitrogen-doped graphene and adsorption Lead sulfate between nitrogen-doped graphene sheets, the mass ratio of nitrogen-doped graphene to lead sulfate i...

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Abstract

The invention provides a graphene composite electrode material. The graphene composite electrode material comprises nitrogen-doped graphene and lead sulfate adsorbed between nitrogen-doped graphene sheet layers; the mass ratio of the nitrogen-doped graphene to the lead sulfate is 1:(10-20). When the graphene composite electrode material is applied to a negative electrode of a lead-carbon battery, the nitrogen-doped graphene is a non-polarity material and can be well compatible with electrolyte-sulfuric acid of the lead-carbon battery, so that reduction of the electrochemical polarization of the negative electrode is facilitated. The interlayer spacing of the nitrogen-doped graphene is large so that the specific surface area is large and the nitrogen-doped graphene is suitable for being used as a growing point of a lead sulfate crystalline grain under a large-power condition; the sulfation of the negative electrode under the large-power condition is reduced so that the cycle life of the negative electrode is prolonged and the cycle performance of the lead-carbon battery is improved. The invention further provides a preparation method of the graphene composite electrode material, lead-carbon battery negative electrode lead plaster and a preparation method thereof, and the lead-carbon battery.

Description

technical field [0001] The invention relates to the technical field of storage batteries, in particular to a graphene composite electrode material and a preparation method, a lead-carbon battery negative electrode paste and a preparation method, and a lead-carbon battery. Background technique [0002] The development of lead-acid batteries has a history of more than one hundred years, and its improved product, valve-regulated lead-acid batteries (VRLA), has a history of several decades. It is used in a wide range of fields, including car ignition devices, small household energy storage devices, and large energy storage devices used in power plants. The wide application of lead-acid batteries, especially valve-regulated lead-acid batteries, is mainly due to the characteristics of low cost, long life, good safety performance, and the recycling rate of waste batteries is as high as 95%. With the deepening of research, lead-acid batteries will develop towards larger capacity an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M4/58H01M10/06
CPCY02E60/126H01M4/57H01M4/62H01M10/06Y02E60/10
Inventor 周明杰钟玲珑王要兵吴凤
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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