Positive plate, positive plate and solid-state battery

Abstract

The invention provides a positive plate, a positive plate and a solid-state battery. Raw material components for preparing the positive plate comprise 60%-98% of an active electrode material, 1%-15% of an electronic conductive agent, 0.2%-10% of an auxiliary agent and 0.8%-15% of an ionic conductive agent. And the positive plate is formed by compounding a positive plate and a current collector layer by adopting hot rolling. The solid-state battery is formed by assembling a positive electrode plate layer formed by positive electrode plates, a solid-state electrolyte layer and a negative electrode plate laminated sheet formed by a metal lithium negative electrode in sequence. The positive plate has low porosity; by adopting the active electrode material, the ion conductive agent, the auxiliary agent and the like, the migration number and diffusion rate of lithium ions can be improved, and the conductivity and battery rate are improved; according to the preparation process, a solvent-free dry process is adopted, so the interface contact impedance in the solid-state battery is effectively reduced, an integrated electrode with an electron and ion conductive network is constructed, integrated forming of the solid-state electrolyte of the electrode is realized, and industrialization of the solid-state battery is promoted to be realized as early as possible.

Description

technical field [0001] The invention belongs to the technical field of solid-state batteries, and relates to a positive electrode sheet, a positive electrode plate and a solid-state battery. Background technique [0002] Due to its excellent characteristics such as ultra-high safety, high energy density, highly integrated manufacturing and grouping methods, solid-state batteries are the mid-to-long-term technical route and even the ultimate technical solution for high-performance lithium batteries. Power batteries and other fields have broad application prospects. [0003] In order to realize the large-scale application of solid-state batteries, some key issues need to be broken through. Compared with liquid batteries, a core difference of solid-state batteries is that their interfaces are solid-solid interfaces, including the interface between different components inside the electrode, and the interface between the electrode and the electrolyte. Common problems such as in...

AI Technical Summary

Problems solved by technology

[0007] However, the current related patents mainly solve the problems of uniform powder mixing, continuous film formation, and consistency control faced by the solvent-free process. The purpose of the solvent-free process is still to prepare porous electrodes for liquid batteries, and the plates are relatively thin Thin, so as to promote the full infiltration of the electrolyte, thereby ensuring the cycle performance and rate performance of the battery; and the porous electrode and solid-liquid interface of the liquid battery obviously cannot give full play to the maximum benefit of the solid-state battery

There is still a lack of relevant research on low-porosity, ultra-thick integrated electrodes (both electronically and ionically conductive networks) used in solid-state batteries, and there are even fewer scalable processes or methods involved. Therefore, a new design of solid-state battery electrode structure and preparation is urgently needed technology, realize the maximum performance of solid-state batteries, and realize the industrial application of solid-state batteries as soon as possible

Images