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Application of Sulfonated Polyetherketone Ion Exchange Membrane in Zn-Ag Batteries

A sulfonated polyether ketone and ion exchange membrane technology, which is applied to silver storage batteries, alkaline storage batteries, battery pack components and other directions, can solve the problems of affecting the activation speed of the battery, troublesome battery assembly, and poor shelf stability, and achieve the preparation process. Clean and environmentally friendly, good battery performance, and controllable effects

Active Publication Date: 2020-03-10
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

However, this kind of membrane material has the disadvantages of low liquid absorption rate and poor shelf stability. When assembling the battery, it is necessary to install an auxiliary diaphragm to promote the absorption of electrolyte by the main diaphragm to complete the requirement of rapid activation, which brings troubles to battery assembly.
Moreover, this kind of membrane material cannot transfer ions well before fully absorbing the electrolyte, resulting in a large internal resistance of the battery, which in turn affects the activation speed of the battery.

Method used

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  • Application of Sulfonated Polyetherketone Ion Exchange Membrane in Zn-Ag Batteries
  • Application of Sulfonated Polyetherketone Ion Exchange Membrane in Zn-Ag Batteries
  • Application of Sulfonated Polyetherketone Ion Exchange Membrane in Zn-Ag Batteries

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The prepared sulfonated polyether ether ketone ion exchange membranes all exhibited a uniform and dense structure ( image 3 ); the zinc-silver battery was assembled with SPEEK-1 film, and its performance was tested, and the voltage platform was stable at about 1.48V ( Figure 6 ), higher than the voltage platform of assembling zinc-silver battery with cellulose acetate membrane, shows that the membrane resistance of SPEEK-1 membrane is lower than the membrane resistance of cellulose acetate membrane; The hydroxide ion permeation rate of SPEEK-1 membrane is tested ( figure 1 ) found that the rate of hydroxide ions permeating the SPEEK-1 membrane is much higher than that of the cellulose acetate membrane, which is mainly related to the uniform and dense distribution of sulfonic acid groups in the SPEEK-1 membrane ( Figure 4 ). After immersing SPEEK-1 in 1mol / L KOH for 30 days, the battery performance was investigated, and it was found that the battery performance did n...

Embodiment 2

[0035] Hydroxide ion permeation rate and battery performance tests were carried out on the prepared SPEEK-2 membrane, and the SPEEK-2 membrane showed a uniform and dense structure ( image 3 ), due to the uneven distribution of ion clusters in the membrane ( Figure 4 ), its hydroxide ion permeation rate is lower than that of cellulose acetate membrane ( figure 2 In b), the discharge voltage plateau (1.35 V) of the zinc-silver battery assembled with SPEEK-2 is lower than that of the zinc-silver battery assembled with cellulose acetate membrane.

Embodiment 3

[0037] Hydroxide ion permeation rate and battery performance tests were carried out on the prepared SPEEK-3 membrane, and the SPEEK-3 membrane showed a uniform and dense structure ( image 3 ), the distribution of ion clusters in the membrane is relatively uniform ( Figure 4 ), its hydroxide ion permeation rate is higher than that of cellulose acetate membrane ( figure 2 In b), the discharge voltage plateau (1.45V) of the zinc-silver battery assembled with SPEEK-3 is higher than that of the zinc-silver battery assembled with cellulose acetate film, slightly lower than that of the zinc-silver battery assembled with SPEEK-1 The discharge voltage platform of the battery.

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Abstract

The invention relates to the application of a class of sulfonated polyetherketone ion-exchange membranes in zinc-silver batteries. The ion-exchange membranes are prepared from polyetherketone resins through sulfonation. The sulfonated polyetherketone ion-exchange membrane has a simple process, an environmentally friendly process, a controllable sulfonation degree, and easy mass production. The sulfonated polyether ketone ion-exchange membrane prepared by the present invention can withstand alkaline electrolyte, has excellent liquid absorption rate of electrolyte, and high permeability to hydroxide ions, and the battery assembled in this way has good battery performance. performance.

Description

technical field [0001] The invention relates to the application of sulfonated polyetheretherketone ion exchange membranes in zinc-silver batteries, in particular to the application of sulfonated polyetheretherketone membranes in zinc-silver batteries. Background technique [0002] Zinc-silver battery is an important type of reserve battery, especially used in the missile and aviation fields to provide power for power, control, safety and other systems. Its notable features are stable discharge voltage, high safety, high rate discharge capacity and High specific energy. For zinc-silver batteries, activation speed and wet life are two key indicators. Zinc-silver batteries mainly include three parts: positive plate, negative plate and separator. The performance of the whole battery is determined by three materials. [0003] The separator has a great influence on the performance and life of the zinc-silver battery. It is of great significance to study the performance of the se...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/16H01M6/04H01M10/32H01M50/411
CPCH01M6/04H01M10/32H01M50/411Y02E60/10
Inventor 李先锋张华民袁治章赵于月
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI