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Carbon-based composite electrode material for super lead-acid battery and preparation method thereof

A technology for super lead-acid batteries and composite electrodes, which is applied in the direction of lead-acid battery electrodes, battery electrodes, circuits, etc. It can solve the problems of large difference in working potential range and supercapacitor electrodes can not work normally, and achieves a simple and easy preparation method , stable performance and improved service life

Inactive Publication Date: 2011-11-16
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the technical problem that the working potential range between the porous carbon electrode of the existing supercapacitor and the negative electrode of the lead-acid battery is relatively large, which causes the supercapacitor electrode to not work normally in the superlead-acid battery, and provides a supercapacitor Carbon-based composite electrode material for lead-acid battery and preparation method thereof

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  • Carbon-based composite electrode material for super lead-acid battery and preparation method thereof
  • Carbon-based composite electrode material for super lead-acid battery and preparation method thereof
  • Carbon-based composite electrode material for super lead-acid battery and preparation method thereof

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specific Embodiment approach 1

[0015] Embodiment 1: The carbon-based composite electrode material used for the super lead-acid battery of this embodiment consists of 10% to 91.9% porous carbon material, 8% to 80% PbSO 4 and 0.1% to 10% of the modification material, wherein the modification material is CdSO 4 、In 2 (SO 4 ) 3 , ZnSO 4 , SnSO 4 or Bi 2 (SO 4 ) 3 , modified materials or by mass percentage from 25% to 75% In 2 (SO 4 ) 3 and Bi from 25% to 75% 2 (SO 4 ) 3 Composition, modified material or ZnSO by mass percentage from 25% to 75% 4 and 25% to 75% of SnSO 4 Composition, modified materials or by mass percentage from 10% to 30% In 2 (SO 4 ) 3 , 10% to 30% Bi 2 (SO 4 ) 3 , 10% ~ 30% ZnSO 4 and 10% to 70% of CdSO 4 Composition; the porous carbon material is activated carbon, activated carbon fiber, activated carbon felt, mesoporous carbon or carbon nanotube.

[0016] In this embodiment, the porous carbon material is first impregnated with a soluble salt solution of lead element, s...

specific Embodiment approach 2

[0017] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the carbon-based composite electrode material used for super lead-acid batteries consists of 29% to 84% porous carbon material and 15% to 70% PbSO by mass percentage 4 And 1% to 9% of modified materials. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0018] Specific embodiment three: the difference between this embodiment and specific embodiment one is that the carbon-based composite electrode material used for super lead-acid batteries consists of 50% porous carbon material, 45% PbSO by mass percentage 4 and 5% modifier material. Others are the same as in the first embodiment.

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Abstract

The invention provides a preparation method of a carbon-based composite electrode material for a super lead-acid battery, relating to a composite electrode material and a preparation method thereof. The invention solves the technical problem that the working potential range difference between the porous carbon electrode of the traditional super capacitor and the cathode of the lead-acid battery is great. The electrode material provided by the invention comprises a porous carbon material, lead sulfate and a modification material, or lead powder substitutes for lead sulfate. The preparation method comprises the following steps of: mixing and immersing a porous carbon material and a soluble lead salt solution, sulphating the mixture, drying the product, and uniformly mixing the product with the modification material to obtain an electrode material; or mixing and immersing the porous carbon material, the oxide or a soluble salt of a modification element and a soluble lead salt solution, sulphating the mixture, and drying the product to obtain the electrode material; or uniformly mixing the porous carbon material, Pb powder and the modification material to obtain the electrodematerial. The carbon-based composite electrode material has equivalent discharge inception working potential and the equivalent hydrogen evolution potential to the cathode of the common lead-acid battery and is used for a super lead-acid battery or a super capacitor.

Description

technical field [0001] The invention relates to a composite electrode material and a preparation method thereof. Background technique [0002] Electric vehicles require high power density, high energy density, long life and low price for the power supply. New super battery technology is one of the important options to meet this requirement. The so-called super battery is a new type of energy storage device or power device that combines the characteristics of a battery and a capacitor by mixing all or part of the electrodes of a supercapacitor with various battery-type electrodes. Among them, the porous carbon electrode of the supercapacitor is embedded in the valve-regulated lead-acid (VRLA) battery to form a supercapacitor-based superlead-acid battery, which is one of the important options for the power source of hybrid vehicles in the future. [0003] Mixing all or part of supercapacitor electrodes with various battery-type electrodes to form asymmetric supercapacitors o...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/20
CPCY02E60/126Y02E60/10
Inventor 袁国辉王殿龙胡信国胡新春杨惠强方明学张洁
Owner HARBIN INST OF TECH
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