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Grid alloy for single-walled carbon nano-tube storage battery and preparation method thereof

A single-wall carbon nanotube, battery plate technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problem of hydrogen evolution, water loss and self-discharge increase of batteries, water loss , Reduce the potential of hydrogen evolution of the negative electrode, etc., to achieve the effect of superior current distribution capacity, prevent battery water loss, and reduce capital backlog

Active Publication Date: 2014-12-24
CHAOWEI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, antimony will promote battery dehydration and self-discharge. No matter how much antimony is in the lead-antimony alloy, the antimony will inevitably dissolve from the surface of the positive grid during the use of the battery, and transfer to the surface of the negative plate through the separator, reducing the negative electrode capacity. Hydrogen evolution potential, resulting in increased hydrogen evolution, water loss and self-discharge of the battery
Although lead-antimony-cadmium alloy has excellent performance, cadmium has environmental protection weaknesses such as toxicity and carcinogenicity, which have been excluded from the consideration of the grid

Method used

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  • Grid alloy for single-walled carbon nano-tube storage battery and preparation method thereof
  • Grid alloy for single-walled carbon nano-tube storage battery and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Single-walled carbon nanotubes with a diameter of 1.5 nm react with anionic surfactants to make a single-walled carbon nanotube solution, add copper sulfate solution to the solution, dry and crystallize the unnecessary components, and combine with copper oxide and oxide Tin is mixed and stirred evenly, aluminum is added and reduced by vacuum melting at 800°C to obtain a single-walled carbon nanotube master alloy, which is added to lead at a ratio of 1:10 and melted at 550°C to cast it into a battery grid. The resistivity of the grid at room temperature is 0.2 ohm·mm2 / m, which is close to that of pure lead. The instant Brinell hardness of the grid is 25-28, and the Brinell hardness after aging for 7 days is 29-33.

[0037] The grid alloy prepared in this embodiment contains: the mass content of single-walled carbon nanotubes is 0.01%, the copper content is 0.01%, the tin content is 0.25%, the aluminum content is 0.001%, and the balance is lead.

Embodiment 2

[0039] Single-walled carbon nanotubes with a diameter of 1.5 nm were mixed with copper oxide and tin oxide and stirred evenly, then aluminum was added and reduced by vacuum melting at 780 °C to obtain a single-walled carbon nanotube master alloy, which was added to lead and mixed with lead at a ratio of 1:10. Melted at 550°C, cast into battery grids.

[0040] The resistivity of the grid at room temperature is 0.2 ohm·mm2 / m, which is close to that of pure lead. The instant Brinell hardness of the grid is 27-28, and the Brinell hardness after aging for 7 days is 30-31.

[0041] The grid alloy prepared in this embodiment contains: the mass content of single-walled carbon nanotubes is 0.015%, the copper content is 0.012%, the tin content is 0.3%, the aluminum content is 0.0012%, and the balance is lead.

Embodiment 3

[0043] Single-walled carbon nanotubes with a diameter of 4 nm react with anionic surfactants to make a single-walled carbon nanotube solution, add copper sulfate solution to the solution, dry and crystallize unnecessary components, and combine with copper oxide and oxide Tin is mixed and stirred evenly, aluminum is added and reduced by vacuum melting at 750°C to obtain a single-walled carbon nanotube master alloy, which is added to lead at a ratio of 1:11 and melted at 550°C to cast it into a battery grid.

[0044] The resistivity of the grid at room temperature is 0.2 ohm·mm2 / m, which is close to that of pure lead. The instant Brinell hardness of the grid is 25-26, and the Brinell hardness after aging for 7 days is 29-30.

[0045] The grid alloy prepared in this embodiment contains: the mass content of single-walled carbon nanotubes is 0.018%, the content of copper is 0.016%, the content of tin is 0.32%, the content of aluminum is 0.0011%, and the balance is lead.

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Abstract

The invention belongs to the technical field of battery production, relates to a grid alloy for manufacturing a valve regulated sealed lead-acid storage battery, and particularly relates to a grid alloy for a single-walled carbon nano-tube storage battery and a preparation method of the grid alloy. The grid alloy of the single-walled carbon nano-tube storage battery comprises the following components in percentage by mass: 0.002-0.02 percent of a single-walled carbon nano-tube, 0.008-0.02 percent of copper, 0.15-0.45 percent of tin, 0.0005-0.0015 percent of aluminum and the balance of lead. The internal resistance of the grid alloy is close to that of pure lead since the produced single-walled carbon nano-tube has an excellent electrical conductivity, so that a single-walled carbon nano-tube grid has an excellent current distributing capability, and the storage battery has good charge and discharge performances.

Description

technical field [0001] The invention belongs to the technical field of battery production, and relates to a grid alloy used in the manufacture of valve-controlled sealed lead-acid batteries, in particular to a single-wall carbon nanotube battery grid alloy and a preparation method thereof. Background technique [0002] The grid is the basic component of the valve-regulated sealed lead-acid battery, it is the carrier of the active material, and it is also a conductive current collector. The grid is the core part of the battery, which is composed of the grid and the active material, and its quality directly affects various performance indicators of the battery. Therefore, the performance of the grid alloy directly affects the quality of the battery. Lead-calcium alloy series and lead-antimony alloy series are two alloy series commonly used in grids. Commonly used lead-calcium series include lead-calcium-tin-aluminum, uncommonly used ones include lead-calcium-high-tin, lead-c...

Claims

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Application Information

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IPC IPC(8): C22C11/00C22C1/03C22C1/10H01M4/68B82Y30/00B82Y40/00
CPCY02E60/10
Inventor 周明明杨新新戴贵平阙奕鹏李伟伟李斌
Owner CHAOWEI POWER CO LTD
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