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Current collector of lead-acid storage battery

A lead-acid battery and current collector technology, applied in battery electrodes, electrode carriers/current collectors, circuits, etc., can solve problems such as restricting the performance of lead-acid batteries, being less than ideal, limiting the application level and development space of lead-acid batteries, etc. The effect of material with low apparent density, strong electrical conductivity and high mechanical strength

Inactive Publication Date: 2017-06-20
杨春晓
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lead alloy or pure lead current collector has the advantages of easy processing, corrosion resistance, high oxidation potential resistance, high gas evolution overpotential, and compatibility with the electrochemical system of lead-acid batteries. However, it has the advantages of mechanical strength, corrosion resistance, and material specific gravity. , and even electrical conductivity are not ideal, which restricts the performance of lead-acid batteries, such as specific energy, service life, high-current discharge, etc., thus greatly limiting the application level and development space of lead-acid batteries in the fields of power and energy storage.

Method used

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Examples

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Effect test

Embodiment 1

[0035] The current collector of this embodiment is TiO 2 / Al composite material current collector, the structure of the current collector and the composition of the composite material are as follows figure 1 a and figure 2 As shown, it is a flat grid structure, in which the thickness of the positive grid is 2 mm, and the thickness of the negative grid is 1.3 mm; the material is composed of an Al matrix and a cladding layer TiO wrapped around the Al matrix. 2 Composed of TiO 2 The thickness is 1nm.

[0036] Applying the composite current collector to the positive and negative electrodes of the lead-acid battery, compared with pure lead or lead alloy grid, can increase the specific power of the applied lead-acid battery by 20% to 61%, and increase the weight specific energy by 23%. ~40%, and the amount of gas evolution is reduced by 30%~52%.

Embodiment 2

[0038] The current collector of the present embodiment is ((TiO 2 -TiB 2 ) 99.9 -Sb 0.1 ) / Al composite current collector, the structure of the current collector and the composition of the composite material are as follows figure 1 c and figure 2 As shown, it is an expanded grid structure, the grid thickness is 2mm, and the material is composed of Al matrix and doped ((TiO 2 -TiB 2 ) 99.9 -Sb 0.1 ) cladding layer material composition. Among them, ((TiO 2 -TiB 2 ) 99.9 -Sb 0.1 ) The cladding layer material is composed of TiO doped with 0.1% mole ratio of Sb at the atomic cluster level 2 -TiB 2 Made of hybrid material with a thickness of 600nm.

[0039] Applying the composite current collector to the positive electrode of the lead-acid battery, compared with pure lead or lead alloy grid, can increase the weight-specific power of the applied lead-acid battery positive electrode by 37% to 82%, and increase the weight-specific energy by 27%. ~63%, the amount of gas e...

Embodiment 3

[0041] The current collector of the present embodiment is ((Ti 3 N 4 -SnO 2 ) 99.9 Sb 0.1 ) / Al composite current collector, the structure of the current collector and the composition of the composite material are as follows figure 1 d and figure 2 As shown, it is a coiled porous wall plate, the thickness of the wall plate is 1mm, the diameter of each round hole is 4mm, and the hole center distance is 6mm; its material is composed of Al matrix and ((Ti 3 N 4 -SnO 2 ) 99.9 Sb 0.1 ) cladding layer composition, wherein, the cladding layer ((Ti 3 N 4 -SnO 2 ) 99.9 Sb 0.1 ) material consists of Ti 3 N 4 -SnO 2 The hybrid material at the atomic cluster level is formed by doping 0.1% Sb in molar ratio, and the thickness is 50 μm.

[0042] Applying the composite material current collector to the positive electrode of the wound lead-acid battery, compared with pure lead or lead alloy grid, can increase the weight specific power of the applied lead-acid battery positive...

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Abstract

The invention discloses a current collector of a lead-acid storage battery. The current collector comprises a base body and a coating layer for coating the exterior of the base body; the material of the base body comprises one or more kinds of metal or metal alloy, carbon nanotubes and graphene, wherein the conductivity of the metal or metal alloy is higher than that of metallic titanium; and the material of the coating layer comprises one or more kinds of a non-metallic titanium compound, SnO<2> and a SnO<2> composite material. A composite material is adopted to form the current collector of the lead-acid storage battery disclosed by the invention; compared with the existing pure lead or lead alloy grid, the current collector has the advantages of low material apparent density, strong conductivity, high mechanical strength, corrosion resistance, high hydrogen evolution and oxygen evolution overpotential and the like; and in addition, the gravimetric specific energy, gravimetric specific power, cycle life, passivation resistance, electrolyte retention and the like of the lead-acid storage battery can be effectively improved.

Description

technical field [0001] The invention relates to the field of lead-acid batteries, in particular to a collector of lead-acid batteries. Background technique [0002] Lead-acid battery current collectors, such as lead-acid battery grids, are used to distribute, collect, and transport the current inside the lead-acid battery, and also play a role in mechanically supporting and fixing the active material or lead paste of the lead-acid battery. At present, the current collectors of widely used lead-acid batteries are basically made of lead alloy or pure lead. Lead alloy or pure lead current collector has the advantages of easy processing, corrosion resistance, high oxidation potential resistance, high gas evolution overpotential, and compatibility with the electrochemical system of lead-acid batteries. However, it has the advantages of mechanical strength, corrosion resistance, and material specific gravity. , and even electrical conductivity are not ideal, which restricts the p...

Claims

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Application Information

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IPC IPC(8): H01M4/68H01M4/66H01M4/70
CPCH01M4/662H01M4/663H01M4/666H01M4/667H01M4/68H01M4/70Y02E60/10
Inventor 杨春晓
Owner 杨春晓
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