US 12,573,668 B2 · Neutral zinc manganese secondary battery and electrolyte

Abstract

The neutral zinc manganese battery includes a neutral zinc manganese flow battery and a power battery. The flow battery includes positive electrode, negative electrode, electrolyte and membrane. The corresponding flow battery includes positive and negative pumps, pipelines and storage tanks. For the power battery, the electrolyte is stored in the porous electrode, while for the flow battery, the positive and negative electrolyte flows through the positive and negative electrodes through the pump and pipeline and finally returns to the storage tank to realize the circulation of electrolyte in the electrode chamber and storage tank. In addition, the positive and negative electrode electrolyte is a neutral solution of zinc salt and manganese salt with specific composition. During charging, MnO2 of the positive electrode can be oxidized directly to α-MnO2. During discharge, MnO2 dissolves into Mn2+.

Claims7

Dependent claims

A zinc manganese secondary battery, comprising:

a positive electrode, a negative electrode, a positive electrolyte, a negative electrolyte, and a membrane disposed between the positive electrode and the negative electrode,
wherein the positive electrolyte and the negative electrolyte are aqueous solutions containing potassium chloride, potassium acetate, or both, and a plurality of salts and having a pH value of 4-6,
wherein the plurality of salts are selected from the group consisting of manganese acetate, manganese chloride, zinc acetate, and zinc chloride,
wherein a molar ratio of manganese salt to zinc salt is 1:1 to 1:2, a molar ratio of potassium ion to manganese ion is 4:1 to 2:1, and a molar ratio of acetate anion to manganese ion is 4:1 to 1:1,
wherein the membrane is a porous composite membrane comprising a substrate and a polymer resin coating on a surface exposed to the positive electrode, and
wherein the substrate is prepared from one or more polymers of PES, PVC, PSF, and PE, and the polymer resin coating comprises one or more of SPEEK, PBI, and a sulfonated tetrafluoroethylene based fluoropolymer-copolymer.

3 more elements

Dependencies are inferred from the claim text.

Neutral zinc manganese secondary battery and electrolyte

Life of this patent

Neutral zinc manganese secondary battery and electrolyte

Life of this patent

Abstract

Claims7