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Composite membrane used for secondary alkaline zinc-manganese dioxide battery, and preparation method therefor

A composite diaphragm, zinc-manganese battery technology, applied in battery pack parts, circuits, electrical components and other directions, can solve the problem of low production efficiency, hydrated cellulose film cannot be hot-melted, and secondary alkaline zinc-manganese batteries cannot be obtained. Good development and other issues, to achieve the effect of good chemical stability and good resistance to zinc oxide dendrites

Active Publication Date: 2015-11-25
HENAN KEGAO RADIATION CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem of zinc oxide dendrites on zinc electrodes still hinders the development of secondary alkaline zinc-manganese batteries.
Secondary alkaline zinc-manganese batteries have not been well developed so far
The presence of hydrated cellulose film makes this difficult because hydrated cellulose film cannot be hot-melted
People can only complete this process through careful manual coiling, and the production efficiency is very low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for preparing a composite separator for secondary alkaline zinc-manganese batteries, comprising the following steps: (1) combining a 10 μm thick polypropylene microporous membrane with a 25 g / m 2 Wet-laid nonwovens with surface density containing ultra-fine polyolefin fibers and vinylon fibers are thermally bonded together at a temperature of 135°C through a heat sealing machine to form a diaphragm substrate;

[0026] (2) Place the diaphragm base material in a cobalt 60 gamma-ray radiation source. By controlling the position and time of the diaphragm base material in the radiation chamber, the absorbed dose received by the diaphragm base material is 40kGy. When the radiation time exceeds half, stop the radiation , turn the diaphragm substrate upside down and back and forth, and continue to irradiate in the second half, so that the diaphragm substrate receives radiation evenly;

[0027] (3) Put the irradiated diaphragm base material into the grafting reactor, se...

Embodiment 2

[0031] A preparation method for a composite diaphragm for a secondary alkaline zinc-manganese battery, comprising the steps of:

[0032] (1) Combine a polypropylene microporous membrane with a thickness of 16 μm and a thickness of 30 g / m 2 Wet-laid nonwovens with surface density containing ultra-fine polyolefin fibers and vinylon fibers are thermally bonded together at a temperature of 140°C through a heat sealing machine to form a diaphragm substrate;

[0033] (2) Pass the diaphragm substrate continuously through the electron accelerator radiation in the unfolded state, control the beam flow rate of the electron accelerator and the transmission speed of the diaphragm substrate, so that the absorbed dose received by the diaphragm substrate is 25kGy;

[0034] (3) Put the irradiated diaphragm base material into the grafting reactor, seal it, and vacuumize it, then suck the grafting liquid from the bottom of the grafting reactor into the grafting reactor by vacuum, and control th...

Embodiment 3

[0038] A preparation method for a composite diaphragm for a secondary alkaline zinc-manganese battery, comprising the steps of:

[0039] (1) Combine a polypropylene microporous membrane with a thickness of 20 μm and a thickness of 30 g / m 2 Wet-laid nonwovens with surface density containing ultra-fine polyolefin fibers and vinylon fibers are thermally laminated together at a temperature of 150°C through a heat sealing machine to form a diaphragm substrate;

[0040] (2) Pass the diaphragm substrate continuously through the electron accelerator radiation in the unfolded state, control the beam flow rate of the electron accelerator and the transmission speed of the diaphragm substrate, so that the absorbed dose received by the diaphragm substrate is 15kGy;

[0041] (3) Put the irradiated diaphragm base material into the grafting reactor, seal it, and vacuumize it, then suck the grafting liquid from the bottom of the grafting reactor into the grafting reactor by vacuum, and control...

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Abstract

A composite membrane used for a secondary alkaline zinc-manganese dioxide battery, and a preparation method therefor are disclosed, belonging to the technical fields of battery membranes. The composite membrane is in a dual-layer composite structure comprising polypropylene microporous membrane and wet process nonwoven fabrics containing ultra-fine polyolefine fibers and vinylon fibers; and the composite membrane is 0.08-0.12 mm in thickness. The composite membrane has the following aspects of performances: (1) the composite membrane is good in zinc oxide dendritic crystal resistance due to the existence of the microporous membrane; (2) the composite membrane can be processed into membrane pipes easily through an automatic winding machine; (3) the composite membrane is radiation grafted with crylic acid and / or sodium styrene sulfonate to endow the inner and outer surfaces with carboxyl and / or sulfonic acid group hydrophilic functional group, so that the composite membrane has permanent hydrophilicity; and (4) the composite membrane is quite high in chemical stability.

Description

technical field [0001] The invention belongs to the technical field of battery separators, and in particular relates to a composite separator for secondary alkaline zinc-manganese batteries and a preparation method thereof. Background technique [0002] The conventional alkaline zinc-manganese battery is a disposable high specific energy battery, and people have been trying to make it into a rechargeable secondary battery without changing its basic structure. Even if the number of cycles is only dozens of times, the use value of alkaline zinc-manganese batteries will be greatly improved. In order to achieve this goal, people have carried out a lot of research and development on electrode materials, and the chargeability of electrode materials has been basically solved. However, the problem of zinc oxide dendrites on zinc electrodes still hinders the development of secondary alkaline zinc-manganese batteries. Secondary alkaline zinc-manganese batteries have not been well de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/16H01M2/14H01M50/403H01M50/417H01M50/449H01M50/489
CPCH01M50/403H01M50/449Y02E60/10
Inventor 崔国士宋连卿党从军崔攀
Owner HENAN KEGAO RADIATION CHEM TECH
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