Battery electrolyte containing aluminum ions and battery

Abstract

The invention discloses an aluminum ion-containing battery electrolyte and a battery, belongs to the technical field of electrochemistry, and relates to an aluminum ion-containing battery electrolyte and a battery. The aluminum sulfamate is used for the aluminum ion-containing battery electrolyte and the battery, when the aluminum sulfamate is used as the zinc-aluminum dual-ion battery electrolyte, the increase of corrosion and self-discharge of a zinc negative electrode can be avoided, and meanwhile, the price of fluorine-free sulfamate is lower than that of fluorine-containing trifluoromethanesulfonic acid, and the fluorine-free sulfamate is safer; the amino sulfonic acid and the metal aluminum are used for synthesizing the aluminum sulfamate as the battery electrolyte containing the aluminum ions and the battery, so that the battery cost can be reduced, and the battery safety can be improved. And when the electrolyte is used for other batteries with the electrolyte containing aluminum ions, such as an aluminum ion battery, an aluminum-lithium double-ion battery and an aluminum-sodium double-ion battery, the battery cost can be reduced, and the safety is improved.

Description

technical field [0001] The invention relates to a battery electrolyte containing aluminum ions and a battery. Background technique [0002] Since petrochemical energy is a non-renewable resource and is highly polluting, most countries are vigorously developing new energy batteries to replace petrochemical energy. Lithium-ion batteries have made great progress in electric vehicles and energy storage. However, commercial lithium-ion batteries The battery uses a flammable organic electrolyte, and the assembly and production conditions are harsh, coupled with the scarcity of lithium resources, making the cost of lithium-ion batteries high. Metal zinc (Zn) has a theoretical capacity of up to 820 mAhg-1. The secondary battery composed of zinc negative electrode and manganese dioxide positive electrode has high capacity, but its operating voltage is low, most of which is lower than 1.4V, and the overall battery The energy density is low. Adding aluminum salt to the electrolyte of ...

AI Technical Summary

Problems solved by technology

[0003] At present, aluminum trifluoromethanesulfonate is mainly used as the solute in various water-based battery electrolytes containing aluminum ions. Zinc-aluminum double-ion batteries have good charge and discharge performance in high-concentration trifluoromethanesulfonate aqueous electrolytes, but Aluminum trifluoromethanesulfonate is expensive, and the use of this fluorine-containing salt electrolyte will seriously increase the cost of the battery, and the corrosion and self-discharge of the zinc negative electrode will be serious at low concentrations

The solubility of aluminum sulfate is too low to be used as an electrolyte, and the solubility of aluminum nitrate is high, but the zinc negative electrode of the acidic zinc-manganese secondary battery added with aluminum nitrate is severely corroded and hydrogen-evolved, and aluminum nitrate is oxidizing, and friction or impact with organic matter can cause combustion. The stability is not good, there are certain safety hazards in the use of aluminum nitrate, the stability of aluminum chlorate is even worse, it will decompose and explode when heated, and there is a greater safety hazard in the use of aluminum chlorate

Other aqueous batteries containing aluminum ions in the electrolyte, such as aqueous aluminum-ion batteries, aluminum-lithium dual-ion batteries, and aluminum-sodium dual-ion batteries, also generally use expensive aluminum trifluoromethanesulfonate and other fluorine-containing aluminum salt electrolytes, which are relatively expensive. High problems are difficult to solve