Secondary battery and its preparation method, electrical equipment

Abstract

The invention relates to the field of new energy batteries, and in particular, provides a secondary battery, a preparation method thereof, and electrical equipment. The secondary battery includes a molybdenum oxide positive electrode, a lithium-containing solid electrolyte, and a molybdenum oxide negative electrode which are stacked in sequence. The structure of the above-mentioned secondary battery is a lithium-free symmetrical battery structure. The positive and negative electrodes of the battery are cheap, the electrode stability is good, and it is easy to store. The capacity is more than 80%, and its high and low temperature performance is excellent. It can still maintain stability when working at -50-400 ° C, and the capacity is about twice that of normal temperature.

Description

technical field [0001] The invention relates to the field of new energy batteries, in particular to a secondary battery, a preparation method thereof, and an electrical device. Background technique [0002] Due to its high specific capacity and energy density, long cycle life, high working voltage, and no memory effect, lithium-ion batteries are widely used in consumer electronics, power tools, medical electronics, electric vehicles, rail transit, aerospace, and large-scale applications. Renewable energy access, power grid peak regulation and frequency regulation, and distributed energy storage have been widely used. At present, commercial lithium batteries use organic liquid electrolytes, which have poor safety performance and are flammable and explosive. With the development of solid-state electrolyte materials, safe and non-flammable all-solid-state lithium batteries have become the focus of research. [0003] At present, the preparation of existing all-solid-state thin-...

AI Technical Summary

Problems solved by technology

At present, commercial lithium batteries use organic liquid electrolytes, which have poor safety performance and are flammable and explosive. With the development of solid electrolyte materials, safe and non-flammable all-solid-state lithium batteries have become the focus of research.

[0003] At present, the preparation of existing all-solid-state thin-film lithium batteries is based on magnetron sputtering and thermal evaporation, and its positive electrode material is generally a lithium-containing compound (made by magnetron sputtering), such as lithium cobaltate, and its negative electrode The material is generally metallic lithium (produced by thermal evaporation), which has strong activity and is difficult to store, and the existing all-solid-state thin-film lithium battery has high material cost, poor high temperature resistance of the battery, and cannot withstand high temperatures above 200°C , it is difficult to use under special conditions

Images