A zinc-nickel dual-liquid flow battery

Abstract

A zinc-nickel double-liquid flow battery, the single battery includes sequentially stacked nickel electrode positive electrode, cation exchange membrane, annular frame, anion exchange membrane, and negative electrode; the two sides of the annular frame are respectively connected with the cation exchange membrane and the anion The exchange membranes are attached to each other, and the open ends of the two sides of the annular frame are sealed by the cation exchange membrane and the anion exchange membrane, and the middle cavity of the annular frame is surrounded to form an electrolyte storage chamber; the electrolyte storage chamber is equipped with the second The three solutions are used to conduct ions, forming an ion-conducting circuit. Because the battery uses two different ion exchange membranes between the positive and negative electrodes, and introduces a ring frame in the middle, the acidity and alkalinity of the positive and negative electrolytes are separated and designed independently, so that the positive electrolyte of the zinc-nickel flow battery can be used Low-concentration lye, and the negative electrode electrolyte can be replaced by a neutral aqueous solution containing zinc ions, which effectively solves the corrosion drawbacks caused by the high-concentration alkaline zincate aqueous solution required by conventional zinc-nickel flow batteries.

Description

technical field [0001] The invention relates to a zinc-nickel flow battery, in particular to a zinc-nickel double-liquid flow battery. [0002] technical background [0003] The development and utilization of renewable energy such as solar energy, wind energy, and tidal energy cannot do without efficient energy storage equipment. Among many energy storage devices, flow batteries have become one of the most promising energy storage devices due to their low cost, high efficiency, long life, and no geographical constraints. Patent CN101127393A invents a zinc-nickel flow battery, which uses nickel hydroxide or nickelous oxide as the positive electrode, deposited zinc as the negative electrode, and strongly alkaline zincate aqueous solution as the electrolyte, and the flowing electrolyte improves material transfer The process slows down the concentration polarization during the zinc deposition process, and effectively improves the dendrite and deformation problems during the zinc...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the corrosion pollution problem of the strong alkaline electrolyte of the zinc-nickel flow battery, a cation exchange membrane and an anion exchange membrane are respectively introduced between the positive and negative electrodes, so that the pH of the positive and negative electrolytes can be independently designed, and the positive side is alkaline. The concentration of electrolyte can be as low as 0.5mol L -1 , while the electrolyte on the negative side can use a neutral aqueous solution containing zinc ions

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