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Preparation method of titanium/tilox black/lead composite substrate

A titanium oxide, composite substrate technology, applied in lead-acid batteries, electrode carriers/current collectors, electrical components, etc.

Active Publication Date: 2014-12-17
JIANGSU HUAFU STORAGE NEW TECH DEV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Titanium oxide has good electronic conductivity and high chemical stability. It can exist stably for a long time under strong acid, strong alkali and strong oxidative conditions. The polymer binder added at the time affects the conductivity of the double substrate
Metal titanium has the characteristics of small specific gravity, high strength, and corrosion resistance, but the direct use of metal titanium plates as bipolar substrates for lead-acid batteries has its own shortcomings, that is, it is due to PbO2A layer of oxide film is formed on the surface under the action of strong oxidation and positive electrode potential, and this layer of oxide film basically does not have electronic conductivity, and the bonding strength between the oxide film and the active material is poor, so it will cause continuous polarization of the electrode The increase and active material fall off, which eventually leads to the failure of the battery to perform normal charge and discharge cycles

Method used

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  • Preparation method of titanium/tilox black/lead composite substrate
  • Preparation method of titanium/tilox black/lead composite substrate
  • Preparation method of titanium/tilox black/lead composite substrate

Examples

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preparation example Construction

[0025] The preparation method of the titanium / titanium oxide / lead composite substrate of the present invention comprises the following steps:

[0026] Step 1, pretreat the titanium plate, ultrasonically oscillate the titanium plate in acetone for 1-3 min to remove the oil on the surface of the titanium plate; clean the titanium plate cleaned with acetone in distilled water, and clean the cleaned titanium plate Immerse in the mixed solution of hydrofluoric acid, nitric acid and hydrogen peroxide for 1 to 3 minutes to remove the oxide layer on the surface of the titanium plate; wash the titanium plate with the surface oxide layer removed with distilled water, and then engrave it with oxalic acid solution at 85 to 95 °C etched for 2 to 3 hours, and dried in vacuum to obtain a titanium plate with a roughened surface, which can enhance the bonding force with the sintered titanium oxide layer; wherein, the thickness of the titanium plate is 0.05-1 mm; the concentration of hydrofluori...

Embodiment 1

[0032] The preparation method of the titanium / titanium oxide / lead composite substrate of the present invention comprises the following steps:

[0033] Step 1, after degreasing and washing the titanium plate, immerse it in 40ml / L of 42% HF and 65% HNO 3 50ml / L and 30% H by mass 2 o 2Etch in 100 ml / L mixed solution for 2 minutes to remove the oxide layer on the surface of the titanium plate; after washing with distilled water, etch with 15% oxalic acid solution at 95°C for 2 hours to obtain a uniform pitted surface.

[0034] Step 2, measure tetrabutyl titanate, absolute ethanol I, and hydrochloric acid solution with a mass percentage of 36% according to the volume ratio of 17:68:2, and fully mix them to obtain the first solution; add a certain amount of glucose to the In the water ethanol II, obtain the second solution, the addition molar quantity of glucose is equal to the addition molar quantity of tetrabutyl titanate; While stirring, the second solution is added in the fir...

Embodiment 2

[0038] The preparation method of the titanium / titanium oxide / lead composite substrate of the present invention comprises the following steps:

[0039] Step 1, after degreasing and washing the titanium plate, immerse it in 60ml / L of HF with a mass percentage of 42% and HNO with a mass percentage of 65% 3 80ml / L and 30% H by mass 2 O 2 The 150 ml / L mixed solution was etched for 3 minutes to strongly remove the oxide layer on the surface of the titanium plate; after washing with distilled water, it was etched with 15% oxalic acid solution at 85°C for 2 hours to obtain a uniform pitted surface.

[0040] Step 2, measure tetrabutyl titanate, absolute ethanol I, and hydrochloric acid solution with a mass percentage of 36% according to the volume ratio of 17:68:3, and fully mix them to obtain the first solution; add a certain amount of citric acid In absolute ethanol II, the second solution is obtained, wherein the molar amount of citric acid is equal to the molar amount of tetrab...

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Abstract

The invention discloses a preparation method of a titanium / tilox black / lead composite substrate. The preparation method comprises the following steps of carrying out coarsening treatment on the surface of a titanium plate before lead electroplating, carrying out sintering to obtain a tilox black layer, and electroplating a lead layer on the surface by use of conductivity of tilox black so that the titanium / tilox black / lead composite substrate for a bipolar lead acid battery is obtained. The sintered tilox black layer is formed on the surface of the titanium plate so that adhesion of the electroplated lead layer and the titanium plate is improved, the electroplated lead layer is used for improvement of oxygen evolution and hydrogen evolution overpotential and increasing of strength of bonding with the active substance, and lead and the active substance form a firmly combined interface in pole plate curing. The titanium / tilox black / lead composite substrate has good electronic conductivity, is stable in the lead storage battery environment, can firmly bond with the active substance thereby forming a good electronic conductive interface, has high oxygen evolution and hydrogen evolution overpotential and high mechanical strength and is suitable as a substrate of a bipolar lead acid battery.

Description

technical field [0001] The invention relates to a method for preparing a titanium / titanium oxide / lead composite substrate for a bipolar lead-acid battery. Background technique [0002] Due to the advantages of mature production technology, low price and high safety, lead-acid batteries still occupy more than half of the share of secondary batteries at present, but traditional lead-acid batteries have serious disadvantages of low specific energy. As a kind of advanced lead-acid battery, the bipolar lead-acid battery replaces the grid and the internal connection parts of the battery with a bipolar substrate, reducing the amount of lead; moreover, in the bipolar battery, the direction of current flow is the same as that of the battery. Unlike traditional batteries, it is perpendicular to the electrode surface, thus greatly shortening the electron transmission path, thereby improving the utilization rate of active materials and the specific energy and specific power of lead-acid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/70
CPCH01M4/667H01M4/82H01M10/06Y02E60/10
Inventor 王殿龙周寿斌汤慎之黄毅郎笑石魏迪汪的华
Owner JIANGSU HUAFU STORAGE NEW TECH DEV
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