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Method for secondary modification of surface of active carbon material for super battery

A secondary modification and super battery technology, applied to battery electrodes, lead-acid battery electrodes, circuits, etc., can solve problems such as working potential mismatch, and achieve the effect of improving buffer current capacity

Active Publication Date: 2015-05-27
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a simple method, easy to operate, which can suppress the hydrogen evolution of the super battery carbon material and simultaneously solve the problem of the mismatching of the working potential of the Pb and C electrodes of the super battery. Secondary modification modification method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Activated carbon was placed in 0.1mol / L Pb(NO 3 ) 2 The solution was ultrasonically oscillated for 30min to make the Pb 2+ Evenly adsorb on the surface of activated carbon, add 0.1mol / LH after washing and filtering 2 SO 4 Solution, ultrasonic vibration for 30min to make the Pb adsorbed on the surface of activated carbon 2+ combined as PbSO 4 After being fixed on the inner surface of activated carbon pores, washed, filtered and dried, the nanometer Pb-doped activated carbon material is obtained. Combine this material with PbO 2 The powders were mixed at a mass ratio of 1:1 and ground for 30 minutes to obtain a secondary modified activated carbon material.

[0023] The modified activated carbon, binder, and conductive agent were prepared into a slurry according to the conventional electrode ingredient ratio, and evenly coated on the Ti plate current collector (the coating amount of the AC electrode was 0.0076g·cm-2 , The coating amount of the modified electrode is 0...

Embodiment 2

[0026] Activated carbon was placed in 0.5mol / L Pb(NO 3 ) 2 The solution was ultrasonically oscillated for 30min to make the Pb 2+ Evenly adsorb on the surface of activated carbon, add 0.5mol / LNa after washing and filtering 2 SO 4 Solution, ultrasonic vibration for 30min to make the Pb adsorbed on the surface of activated carbon 2+ combined as PbSO 4 After being fixed on the inner surface of activated carbon pores, washed, filtered and dried, the nanometer Pb-doped activated carbon material is obtained. This material was mixed with PbO powder at a mass ratio of 1:2, and ball milled for 30 minutes to obtain a secondary modified activated carbon material.

[0027] The modified activated carbon, binder, and conductive agent were prepared into a slurry according to the conventional electrode ingredient ratio, and evenly coated on the Ti plate current collector (the coating amount of the AC electrode was 0.0080g cm -2 , The coating amount of the modified electrode is 0.0080g. ...

Embodiment 3

[0030] Activated carbon was placed in 2.5mol / L Pb(NO 3 ) 2 The solution was ultrasonically oscillated for 30min to make the Pb 2+ Evenly adsorb on the surface of activated carbon, add 0.05mol / LK after washing and filtering 3 PO 4 Solution, ultrasonic vibration for 30min to make the Pb adsorbed on the surface of activated carbon 2+ combined as Pb 3 (PO 4 ) 2 After being fixed on the inner surface of activated carbon pores, washed, filtered and dried, the nanometer Pb-doped activated carbon material is obtained. Combine this material with PbO and PbO 2 The powders were mixed at a mass ratio of 1:1:1 and ground for 30 minutes to obtain a secondary modified activated carbon material.

[0031] The modified activated carbon, binder, and conductive agent were prepared into a slurry according to the conventional electrode ingredient ratio, and evenly coated on the Ti plate current collector (the coating amount of the AC electrode was 0.0080g cm -2 , The coating amount of the ...

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Abstract

The invention provides a method for secondary modification of the surface of an active carbon material for a super battery. The method for the secondary modification of the carbon material comprises two steps, including carbon material nanometer Pb modification and carbon material surface Pb coating. According to the method disclosed by the invention, by utilizing microcosmic and macroscopic dual-scale depth, uniformity and great modification of a Pb element in the carbon material, the aims of inhibiting hydrogen evolution of the carbon material in an acidic system, increasing the capacity and regulating an electrochemical window are realized; the problem that only one aspect of defect of the carbon material can be overcome in the prior art is solved, so that an active carbon negative electrode and a Pb electrode of the super battery have the same working potential; the buffer current capability of the C negative electrode is improved, and the problem that the Pb electrode and the C electrode of the super battery are not matched in working potential is solved; compared with the hydrogen evolution current of an unmodified carbon material in the prior art, the hydrogen evolution current of the carbon material modified by the method disclosed by the invention is at least reduced by 52% and is even smaller than the hydrogen evolution current of a pure-lead electrode, so the carbon material can be really applied to the super battery and is suitable for industrial application.

Description

technical field [0001] The invention relates to the preparation technology of electrode materials for super lead-acid batteries, in particular to a method for secondary modification of the surface of activated carbon materials for super batteries; it belongs to the technical field of electrochemical energy storage devices. Background technique [0002] Power battery is one of the key technologies of new energy vehicles, and is favored by the majority of automobile and auto parts companies and investors. At present, power batteries mainly include lead-acid batteries, Cd-Ni batteries, MH-Ni batteries, liquid lithium-ion batteries, polymer lithium-ion batteries, proton exchange membrane fuel cells (PEMFC), and direct methanol fuel cells (DMFC). There are on-board experiments. As the battery with the longest application history, lead-acid batteries are widely used as power sources for electronic equipment in traditional cars. In the field of new energy vehicles, they are not on...

Claims

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Application Information

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IPC IPC(8): H01M4/38H01M4/16H01G11/34H01G11/86
CPCH01G11/34H01G11/86H01M4/16H01M4/362H01M4/583Y02E60/10
Inventor 蒋良兴黎朝晖刘芳洋洪波薛海涛
Owner CENT SOUTH UNIV
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