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Application of a Porous Ion Conducting Membrane with Negatively Charged Membrane Surface in Alkaline Zinc-Based Batteries

An ion-conducting membrane, negative charge technology, applied in battery pack components, separators/films/diaphragms/spacers, circuits, etc., can solve problems such as battery short circuits, and achieve the effect of alleviating damage and improving zinc accumulation

Active Publication Date: 2020-08-14
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through the charging characteristics of the separator, the deposition direction of zinc is controlled to solve the danger of zinc dendrites piercing the separator and causing a short circuit in the battery

Method used

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  • Application of a Porous Ion Conducting Membrane with Negatively Charged Membrane Surface in Alkaline Zinc-Based Batteries
  • Application of a Porous Ion Conducting Membrane with Negatively Charged Membrane Surface in Alkaline Zinc-Based Batteries
  • Application of a Porous Ion Conducting Membrane with Negatively Charged Membrane Surface in Alkaline Zinc-Based Batteries

Examples

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Effect test

Embodiment 1

[0048] Using PES / PVP as the base material, dissolve PES / PVP in DMAC solvent to obtain a blend solution with a mass concentration of 35%, wherein the mass ratio of PES to PVP is 1:1, pour the above blend solution on a clean and flat glass On the board, the solvent was volatilized for 10 s under the condition of 20% humidity, and then the whole was immersed in water for 700 s, and a porous ion-conducting membrane was prepared at 25 ° C. After removing PVP, an uncharged PES porous ion-conducting membrane (pore size range : 0.9~40 nm, porosity: ~67%). The above-mentioned uncharged porous membrane was soaked in a solution containing 10wt% benzophenone (BP) for 30min, then its surface was wiped dry and transferred to a solution of 8wt% sodium p-styrene sulfonate. Under the following conditions, a UV light source with a dominant wavelength of 380 nm was used for grafting for 120 minutes to obtain a porous ion-conducting membrane (PES-g-PSNa) with negative charges on one side. The uni...

Embodiment 2

[0052] Using PES / PVP as the base material, dissolve PES / PVP in DMAC solvent to obtain a blend solution with a mass concentration of 35%, wherein the mass ratio of PES to PVP is 1:1, pour the above blend solution on a clean and flat glass On the board, the solvent was volatilized for 10 s under the condition of 20% humidity, and then the whole was immersed in water for 700 s, and a porous ion-conducting membrane was prepared at 25 ° C. After removing PVP, an uncharged PES porous ion-conducting membrane (pore size range : 0.9~40 nm, porosity: ~67%). The above-mentioned uncharged porous membrane was soaked in a solution containing 10wt% benzophenone (BP) for 30min, then its surface was wiped dry and transferred to a solution of 8wt% sodium p-styrene sulfonate. Under the following conditions, a UV light source with a dominant wavelength of 380 nm was used to irradiate grafting for 70 minutes to obtain a porous ion-conducting membrane (PES-g-PSNa) with negative charges on one side,...

Embodiment 3

[0056] Using PES / PVP as the base material, dissolve PES / PVP in DMAC solvent to obtain a blend solution with a mass concentration of 35%, wherein the mass ratio of PES to PVP is 1:1, pour the above blend solution on a clean and flat glass On the board, the solvent was volatilized for 10 s under the condition of 20% humidity, and then the whole was immersed in water for 700 s, and a porous ion-conducting membrane was prepared at 25 ° C. After removing PVP, an uncharged PES porous ion-conducting membrane (pore size range : 0.9~40 nm, porosity: ~67%). The above-mentioned uncharged porous membrane was soaked in a solution containing 10wt% benzophenone (BP) for 30min, then its surface was wiped dry and transferred to a solution of 8wt% sodium p-styrene sulfonate. Under the following conditions, a UV light source with a dominant wavelength of 380 nm was used for grafting for 70 minutes to obtain a porous ion-conducting membrane (PES-g-PSNa) with negative charges on one side, which wa...

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Abstract

The invention relates to an application of a porous ion conduction membrane with negative charges on the membrane surface in an alkaline zinc-based battery. The at least one macromolecule resin without charges is taken as a raw material, an electroneutral porous membrane is prepared by employing a phase inversion method; negative charge groups such as -SO3-, -COO- and the like with negative charges are grafted or compounded on the electroneutral porous membrane by employing an ultraviolet radiation or surface compounding method to give the negative charges so that the negative charges on the membrane repel Zn(OH)42 with the same negative charges to reach the surface of the metal zinc for deposition when Zn(OH)42 is deposited in the direction of the membrane, namely, the Zn(OH)42- is deposited back to the membrane side to prevent the membrane from being damaged by the zinc dendrite; and moreover, due to the back deposition of the Zn(OH)42-, namely, the Zn(OH)42- is deposited in the electrode direction, an electrode and the deposited metal zinc form a composite electrode, and in the discharge process, the metal zinc and the electrode have good contact, and the discharge process of the zinc is more full so as to solve the accumulation problem of zinc.

Description

technical field [0001] The invention relates to the field of alkaline zinc-based secondary batteries, in particular to the application of a porous ion-conducting membrane with a negative charge on the membrane surface in alkaline zinc-based batteries. Background technique [0002] Zinc is located in the fourth period of the periodic table, the second subgroup, the atomic number is 30, and the atomic weight is 65.38. Its crystal has a close-packed hexagonal structure. Zinc is a negative electrode material widely used in batteries at present, and has a variety of superior properties, such as low equilibrium potential, good reversibility, high hydrogen evolution overpotential, low electrochemical equivalent, high specific energy and high energy density, etc., and zinc The resource is very rich, cheap and non-toxic. Compared with traditional nickel-cadmium and lead-acid batteries, the popularization and application of zinc secondary batteries can make full and effective use of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/16H01M2/18
CPCH01M50/409H01M50/463Y02E60/10
Inventor 袁治章李先锋张华民胡静
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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