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Super battery consisting of plumbic acid capacitance and preparation method thereof

A super battery and capacitor technology, applied in the direction of lead-acid batteries, lead-acid battery construction, hybrid capacitor electrodes, etc., can solve the problem of high current charge and discharge performance and low cycle life, short cycle life of lead-acid batteries, and insufficient specific energy, etc. problems, to achieve the effect of enhanced charging acceptance, reduced lead content, and reduced corrosion

Inactive Publication Date: 2010-06-09
湖南科力远高技术集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with traditional electric double-layer capacitors, the specific energy of this invention has been greatly improved, and the specific energy of this invention has reached 59Wh / l; the cycle life of the electric double-layer capacitor disclosed in CN1518752A has also reached 6800 cycles. The specific capacitance is up to about 100mA / cm 2 The charging and discharging current; But, the electric double-layer capacitor disclosed in CN1518752A still has following shortcoming: 1) compared with the high specific energy of lead-acid battery, specific energy is still not high enough; 2) compared with pure double-layer capacitor, High current charge and discharge performance and cycle life are also low
[0004] Japanese Patent No. 2-11008 discloses an electric double layer capacitor with only one polarizable electrode made of carbon material. The shortcoming of this product is that the actual charge and discharge current is very low (0.1 to 1mA / cm 2 ), and very low energy density due to the use of anhydrous electrolytes; another fundamental disadvantage is that the cyclability is very low, only about 100 to 200 cycles
[0005] The general defect of ordinary lead-acid batteries is short cycle life, only 100% DOD is around 200 cycles

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The present embodiment comprises 7 positive pole plates, 8 negative pole plates, and the positive pole plate adopts the common positive pole plate of common lead-acid battery, adopts 8 activated carbon pole pieces in the negative pole plate, and described activated carbon pole piece adopts the following method to make: the activated carbon, conductive agent (Acetylene black), binder (PDFE) are mixed in a ratio of 98:1:1, after stirring evenly, add 1% alcohol, add pure water to cover the mixture, boil for 5 minutes, filter, and press into 0.1mm thick Flakes, and then press the shaped flakes on the negative plate, and dry at 40 degrees Celsius to form a new negative electrode sheet.

[0022] During the charging process of the product in this example, the porosity and acidity of carbon accelerate the diffusion of sulfuric acid, and the oxygen diffused to the negative electrode during overcharging can form organic molecules with carbon atoms, reducing the oxidation of the po...

Embodiment 2

[0026] This embodiment includes 7 positive plates and 8 negative plates. The positive plates are common positive plates of common lead-acid batteries. In the production process of 8 negative plates, 1wt% activated carbon paste is added to the lead paste. The preparation method of the activated carbon mixture is as follows : Activated carbon, conductive agent (graphite), and binder (PDFE) are mixed in a ratio of 92:5:3. After stirring evenly, add 5% alcohol to dissolve, dry at 40 degrees for 12 hours, and then use a pulverizer to grind into diameter Powder smaller than 1mm, added to lead paste as an additive.

[0027] During the charging process of the product of this embodiment, the porosity and acidity of carbon accelerate the diffusion of sulfuric acid, and the oxygen diffused to the negative electrode during overcharging can form organic molecules with carbon, reducing the oxidation of the positive electrode grid. Thereby indirectly improving the charging receiving capacity...

Embodiment 3

[0031] The present embodiment comprises 7 positive plates and 8 negative plates. The positive plates adopt common positive plates of common lead-acid batteries. In the negative plates, 2 activated carbon pole pieces are used. The activated carbon pole pieces are made by the following method: activated carbon, conductive Agent (acetylene black) and binder (PDFE) are mixed in a ratio of 80:10:10, after stirring evenly, add 1% alcohol, add pure water to cover the mixture, boil for 5 minutes, filter, and press into a 2mm thick Sheet, and then press the shaped sheet on the negative grid, and dry it at 40 degrees Celsius to form a new negative electrode sheet.

[0032] During the charging process of the product in this example, the porosity and acidity of carbon accelerate the diffusion of sulfuric acid, and the oxygen diffused to the negative electrode during overcharging can form organic molecules with carbon atoms, reducing the oxidation of the positive electrode grid, thereby ind...

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Abstract

The invention discloses a super battery consisting of plumbic acid capacitance and a preparation method thereof. The super battery comprises a positive plate and a negative plate; a grid of the negative plate is used as a current collector; and 1 to 90 percent of lead plaster in the negative plate of the conventional plumbic acid battery is replaced by active carbon. The invention also discloses a preparation method for the negative plate. The charge receiving capability of the plumbic acid battery of the invention is greatly enhanced, the high-current discharge property is remarkably improved, the water loss of the plumbic acid battery is obviously reduced, and the corrosion of the lead grid of the plumbic acid battery is obviously reduced; the service life is averagely increased by over 80 percent, and the volumetric specific energy reaches 100Wh / l; and the using amount of lead is reduced by 10 to 50 percent, and the consumption of the lead is greatly reduced.

Description

technical field [0001] The invention relates to a lead-acid battery and a preparation method thereof, in particular to a super battery composed of lead-acid capacitors and a preparation method thereof. Background technique [0002] For traditional electric double layer capacitors, the specific energy does not exceed 3Wh / l, as stated in US Patent 4,313,084 and US Patent 4,562,511. [0003] Chinese patent CN1518752A discloses an electric double-layer capacitor, which includes: a polarizable electrode made of carbon material, a non-polarizable electrode including lead dioxide and lead sulfate, and a A separator between the polarizable and non-polarizable electrodes, and an aqueous electrolyte containing sulfuric acid. Compared with traditional electric double-layer capacitors, the specific energy of this invention has been greatly improved, and the specific energy of this invention has reached 59Wh / l; the cycle life of the electric double-layer capacitors disclosed in CN151875...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/155H01G9/058H01G9/038H01M10/06H01M10/12H01G11/32H01G11/60H01G11/86
CPCY02E60/126Y02E60/10Y02P70/50
Inventor 周树良戴桂中何亚登贺永旦
Owner 湖南科力远高技术集团有限公司
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