All-solid-state lithium-ion battery, preparation method thereof, and electrical equipment

Abstract

The invention belongs to the technical field of secondary batteries, and relates to an all-solid lithium ion battery, a preparation method thereof, and electrical equipment. The all-solid-state lithium ion battery of the present invention includes a positive electrode and a negative electrode; wherein, the positive electrode active material in the positive electrode includes a manganese-containing compound; the negative electrode active material in the negative electrode includes a manganese-containing compound. In the all-solid-state lithium-ion battery of the present invention, the active materials in the positive electrode and the negative electrode all use manganese-containing compounds, so that it has a higher crystallinity when annealed at normal temperature or at a lower temperature to ensure its excellent electrochemical performance. Or it can still maintain excellent electrochemical performance without annealing and crystallization, and has the characteristics of no high-temperature treatment process, simplified preparation process, and reduced preparation cost. And it can be prepared on various substrates without being limited by the substrate material; it can also match with the semiconductor process and realize the integration of solid-state batteries on microcircuits.

Description

technical field [0001] The invention belongs to the technical field of secondary batteries, and in particular relates to an all-solid lithium ion battery, a preparation method thereof, and electrical equipment. Background technique [0002] Due to its high operating voltage, high energy density, long cycle life, no memory effect and many other advantages, lithium-ion batteries are widely used in consumer electronics, medical electronics, power tools, electric vehicles, rail transit, aerospace and other fields. However, because the current commercial lithium-ion batteries use liquid organic electrolytes, they are flammable, explosive and volatile, and safety accidents have occurred frequently in recent years. Therefore, all-solid-state lithium batteries have attracted more and more attention in the industry. Using solid-state electrolytes instead of liquid organic electrolytes and preparing all-solid-state thin-film batteries can effectively solve the safety problem of lithiu...

AI Technical Summary

Problems solved by technology

However, the high-temperature annealing process is likely to cause the positive active material film to crack and fall off, resulting in a micro-short circuit in the thin-film battery; in addition, the high-temperature process does not match the semiconductor process, making it difficult to integrate solid-state thin-film batteries on microcircuits; the high-temperature annealing process also makes the entire Solid-state thin-film lithium batteries are difficult to prepare on some low-temperature, low-cost, and highly flexible substrates (such as polyimide, aluminum foil, etc.)

As for the negative electrode material, due to the low melting point of lithium (about 180°C), lithium is easy to absorb water or oxygen and become invalid, so it is difficult to integrate in the integrated circuit when using metal lithium negative electrode (the soldering temperature during integration is usually higher than 180°C ), the production environment is harsh (need to be in a glove box or a high-level ultra-clean room), and it is difficult to apply in a high-temperature place (usually only at a temperature below 180°C)

In addition, since the preparation of positive and negative electrodes uses different processes and equipment, the production process and preparation process are relatively more cumbersome.

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