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A kind of composite carbon material lead-acid battery negative lead paste and preparation method thereof

A technology of lead-acid batteries and negative electrode paste, which is applied in the field of electrochemistry, can solve the problems of poor charge acceptance, etc., and achieve the effects of improving cycle life, facilitating diffusion, and smooth electrochemical reactions

Active Publication Date: 2019-09-27
HENAN CHAOWEI POWER SUPPLY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to achieve the above object, the present invention provides a composite carbon material lead-acid battery negative lead paste and a preparation method thereof, the lead paste effectively solves the problems of poor charge acceptance and improved cycle life of the lead-acid battery currently faced by the lead-acid battery

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A composite carbon material lead-acid battery negative lead paste, comprising the following raw materials in parts by weight: 500g oxidation degree is 76% lead oxide, 2.5g composite carbon material, 4.5g barium sulfate, 1g lignin, 1g humic acid, 0.4 g glass fiber, 42.5g with a density of 1.4g / cm 3 sulfuric acid, distilled water;

[0028] The composite carbon material is 20% of colloidal graphite, 40% of acetylene carbon black, 15% of graphene, and 25% of activated carbon.

[0029] Take a certain amount of the lead paste and apply it on the Pb-Ca grid to make a negative electrode sheet. The negative electrode sheet is kept at 35° C. for 2 hours, and then at 65° C. and a humidity of 85% for 4 hours; the cured negative electrode plate The battery is assembled with the positive plate prepared by the conventional formula, and the density of the electrolyte is 1.3g / cm 3 The sulfuric acid is formed, and the performance of the battery is tested after the formation is complete...

Embodiment 2

[0031] A composite carbon material lead-acid battery negative lead paste, comprising the following raw materials in parts by weight: 500g oxidation degree is 76% lead oxide, 12.5g composite carbon material, 4.5g barium sulfate, 1g lignin, 1g humic acid, 0.4 g glass fiber, 42.5g with a density of 1.4g / cm 3 sulfuric acid, distilled water;

[0032] The composite carbon material is 20% of colloidal graphite, 40% of acetylene carbon black, 15% of graphene, and 25% of activated carbon.

[0033] Take a certain amount of the lead paste and apply it on the Pb-Ca grid to prepare the negative electrode sheet. The negative electrode sheet is kept at 35°C for 2h, and then at 65°C and the humidity is 85% for 4h; the cured negative plate assembly Assemble the battery with the positive plate prepared by the conventional formula, and the density of the electrolyte is 1.3g / cm 3 The sulfuric acid is formed, and the performance of the battery is tested after the formation is completed.

Embodiment 3

[0035] A composite carbon material lead-acid battery negative lead paste, comprising the following raw materials in parts by weight: 500g oxidation degree is 76% lead oxide, 25g composite carbon material, 4.5g barium sulfate, 1g lignin, 1g humic acid, 0.4g Glass fiber, 42.5g density 1.4g / cm 3 sulfuric acid, distilled water;

[0036] The composite carbon material is 20% of colloidal graphite, 40% of acetylene carbon black, 15% of graphene, and 25% of activated carbon.

[0037] Take a certain amount of the lead paste and apply it on the Pb-Ca grid to make a negative electrode sheet. The negative electrode sheet is kept at 35°C for 2h, and then at 65°C and a humidity of 85% for 4h; the cured negative electrode The plate group and the positive plate prepared by the conventional formula are assembled into a battery, and the density of the electrolyte is 1.3g / cm 3 The sulfuric acid was formed, and the performance of the battery was tested after the formation was completed.

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Abstract

The invention discloses a compound carbon material cathode lead plaster of a lead-acid storage battery and a preparation method of the lead plaster. The lead plaster is prepared by mixing lead oxide and a compound carbon material accounting for 0.5-5.0 percent by mass of lead oxide, adding barium sulfate accounting for 0.8-1.0 percent by mass of lead oxide, lignin accounting for 0.1-0.3 percent by mass of lead oxide, humic acid accounting for 0.1-0.3 percent by mass of lead oxide and a chopped fiber accounting for 0.08 percent by mass of lead oxide for uniform stirring, adding sulfuric acid accounting for 8.5 percent by mass of lead oxide, and adjusting lead plaster consistence with distilled water. The apparent density of the lead plaster is 4.45g / cm3. The lead plaster is prepared in the presence of the compound carbon material; the compound carbon material has higher adsorptive capacity and specific surface area; the voidage and acid absorption of a polar plate can be increased; the diffusion of sulfate ions is facilitated; the active surface area of an electrode is increased; an electrochemical reaction of the electrode is smoother; and a cycle life of the lead-acid storage battery is prolonged.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and in particular relates to a composite carbon material lead-acid battery negative electrode paste and a preparation method thereof. Background technique [0002] Traditional lead-acid batteries are mainly used in the starting of electric mopeds, electric road vehicles, hybrid vehicles and various internal combustion engines and wireless communication base stations, etc., but the negative electrode is easily sulfated and fails in a partially charged state, which reduces the battery life. Chargeability and cycle life. This is due to the ineffective use of the active material, the discharge product PbSO 4 There is no efficient conversion to the original existing form, resulting in irreversible PbSO 4 Accumulated on the negative active material, PbSO 4 The accumulation of the negative plate can reduce the effective reaction area of ​​the negative plate, which makes the charging and disc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/57H01M4/20
CPCH01M4/20H01M4/57Y02E60/10
Inventor 张雷李松林闫新华马俊立
Owner HENAN CHAOWEI POWER SUPPLY
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