An electrolyte continuously replaced polyaniline-zinc ion battery and a preparation method thereof

By employing a continuous electrolyte replacement design in polyaniline zinc-ion batteries, and utilizing high and low concentration electrolyte tanks and active material layers within the battery stack, the problem of unstable chemical equilibrium caused by electrolyte concentration fluctuations is solved, thereby improving the battery's energy efficiency and lifespan.

CN118572217BActive Publication Date: 2026-06-02SHANGHAI INVESTIGATION DESIGN & RES INST CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANGHAI INVESTIGATION DESIGN & RES INST CO LTD
Filing Date
2024-05-20
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Polyaniline zinc-ion batteries suffer from unstable chemical equilibrium due to fluctuations in electrolyte concentration during charging and discharging, resulting in large voltage differences, low energy efficiency, and poor rate performance.

Method used

The design employs a continuous electrolyte replacement system, using two electrolyte tanks to store high and low concentration electrolytes respectively. The active material layer within the stack is used to achieve continuous electrolyte replacement, adjusting the electrolyte concentration to maintain chemical reaction balance and reduce overpotential.

Benefits of technology

It improves energy efficiency during charging and discharging, reduces the voltage difference between charging and discharging, extends battery life, and reduces costs.

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Abstract

The application provides a polyaniline-zinc ion battery with continuous replacement of electrolyte, which comprises a first liquid tank, an electric pile and a second liquid tank which are in communication with each other, the first liquid tank and the second liquid tank respectively store high-concentration and low-concentration zinc salt aqueous solutions, the electric pile comprises a polyaniline active layer, a first porous separator and a zinc layer which are adjacent in sequence, the polyaniline active layer is close to the first liquid tank, and the zinc layer is close to the second liquid tank. The polyaniline-zinc ion battery does not need an ion exchange membrane, and the electrolyte in the electric pile can be continuously replaced during charging and discharging, so that the concentration difference polarization is eliminated, the chemical equilibrium of the electrochemical reaction is promoted to move in a favorable direction, the charging and discharging voltage difference of the battery is reduced, the energy efficiency is improved, and the service life is longer.
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