Battery

Abstract

The invention discloses a battery which comprises an anode, a cathode and an electrolyte, wherein the anode comprises an anode active material, the anode active material is capable of reversely separating out an embedded ion, the cathode comprises an inert material which does not participate in an electrochemical reaction, the electrolyte comprises at least one solvent which is capable of dissolving an electrolyte and enables the electrolyte to be ionized, and the electrolyte can be ionized into at least one cathode cation generating reducing-depositing and oxidizing-dissolving on the cathode. The battery is characterized in that the embedded ion can be reversely separated out from the cathode active material firstly, and the cathode cation generates a reducing-depositing charge process on the cathode. The battery disclosed by the invention is safe in operation, low in production cost, excellent in cycle performance and long in service life, and is suitable for being used as a large energy storage system in the field of energy storage and a substitute of a lead-acid battery.

Description

technical field [0001] The invention belongs to the field of electrochemical energy storage, and in particular relates to a rechargeable battery. Background technique [0002] The widespread use of new energy by human beings has led to the rapid expansion of the secondary battery market. In the current new energy system, the requirements for secondary batteries are ubiquitous. Whether it is electric vehicles, wind energy, solar grid connection or grid peak shaving, there is an urgent need for a cheap, reliable, safe and long-life secondary battery. The secondary batteries currently developed are mainly concentrated in lithium-ion batteries, high-temperature sodium-sulfur batteries, sodium-nickel-chloride batteries and vanadium flow batteries. These batteries have their own advantages, such as long life and high energy density of lithium-ion batteries and high-temperature sodium-sulfur batteries, and vanadium redox flow batteries have theoretically unlimited life. But no m...

AI Technical Summary

Problems solved by technology

But no matter what kind of battery, it is impossible to meet the requirements of cheapness, reliability, safety and long life at the same time

Traditional lithium-ion batteries are too expensive and have potential safety hazards; high-temperature sodium-sulfur battery manufacturing technology threshold is high, and the price is expensive; many technical bottlenecks of vanadium redox flow batteries have not yet been broken through, etc.

[0003] For this reason, many researchers are committed to the research of aqueous lithium-ion batteries, hoping to greatly reduce the cost of lithium-ion batteries and improve safety, and some LiMn-based lithium-ion batteries have been proposed. 2 o 4 As the positive electrode, vanadium oxides such as LiV 3 o 8 etc. are negative electrodes and water is the electrolyte, but the poor stability of such negative electrodes in charging and discharging in water and the certain toxicity of vanadium limit the development of such batteries.

So far, the structures of the proposed aqueous lithium-ion secondary batteries have not been able to get rid of the structure based on the lithium ion extraction-intercalation principle, such as the reported VO 2 / LiMn 2 o 4 , LiV 3 o 8 / LiNi 0.81 co 0.19 o 2 , TiP 2 o 7 / LiMn 2 o 4 , LiTi 2 (PO 4 ) 3 / LiMn 2 o 4 , LiV 3 o 8 / LiCoO 2 Wait

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