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A battery current collector and method for preparing same

A current collector and battery collection technology, applied in the direction of electrode carrier/collector, etc., can solve the problems of large internal resistance, high volume resistivity, and restriction of charge and discharge efficiency of the battery, and achieve the reduction of ohmic resistance, smooth surface, and high conductivity. Improved effect

Inactive Publication Date: 2005-09-21
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] So far, the research and technical improvement of the current collector of the all-vanadium redox flow battery have improved the mechanical properties and liquid-impermeable properties, but the electrical conductivity required as a battery electrode material has not yet been achieved, and its volume resistivity Above 0.5 ohm cm
The internal resistance of the assembled battery is relatively large, which restricts the improvement of charging and discharging efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] In a 50-liter mixing kettle, drop into hydrogenation saturation respectively and be 9.85 kilograms of hydrogenated styrene-butadiene-styrene block copolymer (produced by Baling Petrochemical Co., Ltd.) and 4.85 kilograms of polypropylene and 4.85 kilograms of hydrogenation saturation, And 0.15 kg of butyl titanate, 0.15 kg of naphthenic oil, stirred and left to stand for 24 hours. Then send it into twin-screw extrusion pelletization to obtain blended elastomer. 100 grams of the blended elastomer and 100 grams of superconducting carbon black were respectively put into a plasticizer for mixing, and the temperature was controlled at 110° C. for 40 minutes. After the film was removed, it was molded at 175°C for 25 minutes, cooled with tap water, and the volume resistivity, elongation at break, tensile strength and hardness were measured, and the results were:

[0024] Volume resistivity: 0.10 ohm cm

[0025] Elongation at break: 15%

[0026] Tensile strength: 3.9MPa

[...

Embodiment 2～8

[0029] The steps and methods are the same as in Example 1, and the process control conditions, reaction ratio and product performance are shown in Table 1.

[0030] Reality

Shi

example

Blended elastomer ratio

Refining conditions

Molding ratio

Molding conditions

Current Collector Test Results

A

(Kg)

B

(Kg)

C

(Kg)

D.

(Kg)

warm

Spend

℃

Time

between

min

E(g)

F(g)

warm

Spend

℃

Time

between

mi

no

volume electricity

Resistivity

Ω·cm

to break

elongate

Rate%

Rashen

intensity

MPa

Hardness

Shao A

1

9.85

4.85

0.15

0.15

110

40

100

100

175...

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Abstract

This invention refers to the electrode material of cell, especially refers to electrode collector of all vanadium oxidation reduction fluid flow cell and preparation thereof, which contains using hydrogenated styrene-butadiene-styrene block polymer and acrylic rubber-plastics cross blended elastomer as base material, doped with carbon conductive medium, moulding to obtain said invention, the volume resistivity of collector is less than 0.1 ohm-cm, hardness (Shore hardness) is 87-110, tensile strength is 3.5-5.0 MPa, elongation at break is 15-30 %. Said invention greatly raises conductivity and reduces ohmic resistance, the voltage efficiency reaches to 95 % under 25 degrees centigrade 30 mA / cm2.

Description

technical field [0001] The invention relates to an electrode material of a battery, in particular to a current collector of an all-vanadium redox flow battery. Background technique [0002] The all-vanadium redox flow battery has high relative electrode potentials of ions in different valence states, high energy conversion efficiency, and the battery capacity can be increased with the increase of the volume of the liquid storage tank, the service life is long, and the operation and maintenance costs are low. Solar and wind energy storage, stationary power stations and peak-shaving energy storage power stations have good development prospects. [0003] The electrode is the key material of this type of battery. The electrolyte system used in the all-vanadium redox flow battery is a strongly acidic and strong redox flow system. The commonly used metal-based electrodes are not suitable for stability or electrochemical activity. For suitable applications, graphite rods, graphite...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/66
CPCY02E60/10
Inventor 李晓刚黄可龙张波李林德刘素琴常志峰陈立泉
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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