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Application of functional carbon material and high-hydrogen-evolution substance doped functional carbon material

A carbon composite material and functionalization technology, applied in electrical components, battery electrodes, lead-acid batteries, etc., can solve the problems of uneven size, decreased hydrogen suppression effect, poor consistency, etc., to reduce hydrogen evolution, increase carbon material capacity, Stable performance

Inactive Publication Date: 2014-06-25
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since AC is an irregular high-specific surface material, its pores are in the micron or even nanometer scale, and the size is not uniform, which makes the consistency of Pb-doped modification effect poor.
In addition, Pb is only attached to the surface of activated carbon, and may agglomerate in some places through dissolution and recrystallization during the long-term battery cycle, reducing the hydrogen suppression effect.

Method used

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  • Application of functional carbon material and high-hydrogen-evolution substance doped functional carbon material
  • Application of functional carbon material and high-hydrogen-evolution substance doped functional carbon material
  • Application of functional carbon material and high-hydrogen-evolution substance doped functional carbon material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The activated carbon material is placed in a mixed solution of diethylenetriamine (80%) and alcohol (20%), and processed under high-temperature reflux at a temperature of 80°C to obtain a heterocyclic structure rich in pyrrole and pyridine ( figure 1 ) of activated carbon materials.

[0041] The modified activated carbon, binder, and conductive agent are adjusted into a slurry in a certain proportion, and evenly coated on the Ti plate current collector (the coating amount of the AC electrode is 0.0080g cm -2 , The coating amount of the modified AC electrode is 0.0085g. cm -2 ), packaged into a 1cm 2 The electrode, using the three-electrode system to carry out the hydrogen evolution (linear polarization curve) test on the 2273 electrochemical workstation, the test solution is 5mol / L H 2 SO 4 . Under -0.9V vs. SCE, the ordinary activated carbon electrode (simulating the working condition of the negative electrode of lead-acid battery) after two cycles of CV test, the...

Embodiment 2

[0046] The activated carbon material is placed in a mixed solution of a certain concentration (60%) of hydrazine hydrate and alcohol (40%), and processed under high-temperature reflux at a temperature of 60°C to prepare an activated carbon electrode material rich in pyridine heterocyclic structure. Add Pb(NO 3 ) 2 Ultrasound in the solution for 30min to absorb a certain amount of Pb 2+ , and then filtered and washed, the obtained carbon was added to sulfuric acid solution, filtered, washed, and dried to obtain the functionalized carbon surface secondary doped with PbSO 4 carbon material.

[0047] The modified high-hydrogen-evolving substance-doped functionalized carbon composite material, binder, and conductive agent were prepared into a slurry in a certain proportion, and evenly coated on the Ti plate current collector (the coating amount of the AC electrode was 0.0078g. cm -2 , The coating amount of the modified AC electrode is 0.0074g. cm -2 ), packaged into a 1cm 2 ...

Embodiment 3

[0049] The activated carbon material is placed in a mixed solution of ammonium nitrate (70%) and alcohol (30%), and is treated by high-temperature reflux at a temperature of 180°C to prepare an activated carbon electrode material rich in amino groups, hydroxypyridine, and pyrimidine heterocyclic structures. Add Pb(NO 3 ) 2 Ultrasound in the solution for 30min to absorb a certain amount of Pb 2+ , then filtered and washed, the obtained carbon was added to the phosphoric acid solution, filtered, washed, and dried to obtain the functionalized carbon surface doped with Pb twice 3 (PO 4 ) 2 functionalized carbon materials.

[0050] The modified activated carbon, binder, and conductive agent are prepared into a slurry in a certain proportion, and evenly coated on the Ti plate current collector (the coating amount of the AC electrode is 0.0076g cm -2 , The coating amount of the modified electrode is 0.0078g. cm -2 ), packaged into a 1cm 2 The activated carbon electrode is use...

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Abstract

The invention discloses application of a functional carbon material and a high-hydrogen-evolution substance doped functional carbon material. The functional carbon material or the high-hydrogen-evolution substance doped state functional carbon material is taken as a repressed hydrogen cathode carbon material applied in a cathode lead paste additive for preparing a carbon negative electrode or a lead carbon battery of a super battery. The hydrogen evolution impedance on the surface of the functional carbon material or the high-hydrogen-evolution substance doped functional carbon material is increased, so as to increase the hydrogen evolution over-potential and reduce hydrogen evolution. The functional carbon material and the high-hydrogen-evolution substance doped functional carbon material can fully exert the advantages of a C material, the cycle life of the super battery or the lead carbon battery is prolonged and the charge capacity and the discharge capacity caused by over-large current are improved, and simultaneously negative effects caused by overlarge hydrogen evolution current of the C material are avoided when.

Description

technical field [0001] The invention relates to the application of a functionalized carbon material and a functionalized carbon composite material in a doped state with high hydrogen-evolving substances, and belongs to the technical field of electrochemical energy storage devices. Background technique [0002] Due to the disadvantages of low mass specific energy (35-40Wh / kg), large volume, short service life (300-800 times), and difficulty in fast charging, the lead-acid battery greatly limits its application. In recent years, many new technologies for lead-acid batteries have been developed, such as new structures, corrosion-resistant lead alloy positive grids, foamed lead grids, foamed carbon grids, new negative electrode additives, super lead-acid batteries, lead-carbon batteries, bipolar Ceramic diaphragm VRLA battery, etc. Among them, super batteries and lead-carbon battery technologies have attracted the most attention. The super battery is a new type of super lead-a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/583H01M4/62
CPCH01M4/627H01M4/628H01M10/06Y02E60/10
Inventor 蒋良兴洪波刘芳洋薛海涛于枭影李劼刘业翔
Owner CENT SOUTH UNIV
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