Battery

Abstract

The invention belongs to the energy-storage field of electrochemistry, and discloses a battery, wherein the battery comprises a positive electrode, a negative electrode, a diaphragm and an electrolyte, wherein the active substance of the positive electrode is made of one of reversible separation-embedding materials; the negative electrode uses metals; the electrolyte is a solution containing positive separable embedded ions and negative metal ions. The reversibility of the positive electrode of the batter is realized by the embedding or separation of the separable embedded ions on the positive active material; and the reversibility of the negative electrode is realized by the electrochemical deposition and dissolution of the metal ions on the surface of the negative electrode. Compared with the lead-acid battery, the battery disclosed by the invention is more environmental, and cheaper than the battery which adopts nickel as the positive electrode; the energy density is higher; the self-discharging problem of zinc-bromine battery is avoided; and the battery is cheaper than lithium batteries, and convenient for producing and repairing. The battery disclosed by the invention is expected to displace lead-acid batteries in short term; and simultaneously, the battery is expected to be used in electric vehicles and large energy-storage projects.

Description

technical field [0001] The invention belongs to the field of electrochemical energy storage, and in particular relates to a battery. Background technique [0002] Today, when chemical energy is becoming more and more scarce, it is imminent to develop electric vehicles and wind energy. Although the fields of electric motors and propeller propellers have been very mature, there has been no breakthrough in the field of energy storage, which limits the wide application of such as electric vehicles and wind energy. [0003] The rechargeable batteries that have been commercially applied in history include lead-acid batteries, nickel-cadmium batteries, nickel-metal hydride batteries, lithium-ion batteries, etc., and there are also immature nickel-zinc batteries and zinc-bromine batteries. At present, lead-acid batteries and nickel-cadmium batteries are no longer accepted by people due to serious pollution and toxicity. Ni-MH batteries are still too expensive, and nickel resources ...

AI Technical Summary

Problems solved by technology

In order to improve the safety of lithium-ion secondary batteries and reduce battery costs, many researchers are currently working on the research of aqueous lithium-ion batteries, such as LiMn2O4 On the positive electrode, vanadium oxides such as LiV3O8 and other rocking-chair batteries have appeared as the negative electrode, but due to the extremely poor cycle performance of the negative electrode and the toxicity of vanadium, it is limited The development of such batteries

Up to now, the structure of the proposed aqueous lithium-ion secondary battery has not got rid of the rocking-chair structure based on the principle of lithium ion intercalation, such as the reported VO2 / LiMn2 sub>O4, LiV3O8 / LiNi0.81Co0.19O 2, TiP2O7 / LiMn2O4, LiTi2(PO4)3 / LiMn2O4, LiV3 O8 / LiCoO2 etc.

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