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Hydrophilic diaphragm and battery containing hydrophilic diaphragm

A technology of hydrophilic and hydrophilic polymers, applied in the direction of secondary batteries, battery pack components, circuits, etc., can solve the problems of battery short circuit, electrode particle penetration, etc., to improve cycle life, and the process is simple and easy , Improve the effect of electrochemical performance

Inactive Publication Date: 2021-05-14
北京金羽新能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The main purpose of the present application is to provide a hydrophilic diaphragm with a microporous structure and strong hydrophilicity, which solves the problem that the electrode particles pass through the diaphragm during the battery cycle and causes a short circuit in the battery; at the same time, the hydrophilic diaphragm is provided. Application of non-reactive separator in battery method

Method used

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  • Hydrophilic diaphragm and battery containing hydrophilic diaphragm
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  • Hydrophilic diaphragm and battery containing hydrophilic diaphragm

Examples

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Effect test

Embodiment a1

[0041]A hydrophilic diaphragm having a microporous membrane containing a hydrophilic polymer material; the hydrophilic diaphragm has a pore diameter of 0.2 um, a thickness of 0.12 mm, a porosity of 68%; The hydrophilic polymer material is nylon 6; Example A1 The hydrophilic diaphragm is recorded as A1.

Embodiment a2

[0043]A hydrophilic diaphragm having a microporous membrane containing a parental polymer material; the hydrophilic diaphragm has a pore diameter of 0.2 um, a thickness of 0.12 mm, a porosity of 71%; The aqueous polymer material is a polyether sulfone; Example A2 The hydrophilic diaphragm is rejected as A2.

Embodiment a3

[0045]A hydrophilic diaphragm having a microporous film containing a parental polymer material; the hydrophilic diaphragm has a pore diameter of 0.2 um, a thickness of 0.12 mm, a porosity of 75%; The hydrophilic polymer material is nitrate cellulose; Example A3 The hydrophilic diaphragm is recorded as A3.

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Abstract

The invention discloses a hydrophilic diaphragm and a battery containing the hydrophilic diaphragm. The hydrophilic diaphragm is a microporous membrane containing a hydrophilic high polymer material; and the aperture of the hydrophilic diaphragm is 0.1-5 microns, the thickness of the hydrophilic diaphragm is 20-500 microns, and the porosity of the hydrophilic diaphragm is 30-90%. The hydrophilic diaphragm has the beneficial effects that the wettability of the hydrophilic diaphragm in a water-based electrolyte is obviously superior to that of commercial PP and PE microporous membranes and hydrophilic treated polyolefin diaphragms, the capacity of absorbing the water-based electrolyte is higher, and the conductivity of the diaphragm is higher; the hydrophilic diaphragm disclosed by the invention has a uniform microporous structure, the barrier capacity of the hydrophilic diaphragm is higher than that of non-woven fabric, fiber paper and a glass fiber membrane, and the risk of internal short circuit of the battery can be reduced; the hydrophilic diaphragm and electrolyte act together to induce regular growth of zinc dendrites, so that the cycle life of a metal zinc electrode is prolonged; and polarization overpotential of Zn dissolution / deposition is optimized, and the electrochemical performance of the zinc electrode is improved.

Description

Technical field[0001]The present invention belongs to the technical field of the battery, and more particularly to a hydrophilic diaphragm and a battery containing the hydrophilic diaphragm.Background technique[0002]Energy and environmental issues have become a key issue related to sustainable development around the world, developing new green renewable energy and feeding and discharging energy storage devices have become an urgent task of humans. In recent years, the lithium-ion battery has the advantages of high energy density, long cycle life, no memory effect, widely used in portable electronic products, vehicle power batteries, large-scale energy storage, communication base stations and other fields. However, the high cost of lithium-ion batteries, limited lithium reservations, poor security, environmental pollution problems make it limited by specific application scenarios. In another market, the mainstream lead-acid battery has only 25-45 wH / kg, which uses the concentrated ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/414H01M10/38
CPCH01M10/38Y02E60/10Y02P70/50
Inventor 黄杜斌王春源李爱军何鑫田波刘兴坤陈锦华
Owner 北京金羽新能科技有限公司
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