Solid-state battery electrolyte material generation method

Abstract

In the first charging / discharging process of a liquid-state lithium ion battery, a battery material reacts with electrolyte on a solid-liquid phase interface to form a layer of passivation layer covered on the surface of the electrode material, the passivation film with the feature of the solid electrolyte is called as solid electrolyte interface, and abbreviated as SEI. The essence of the SEI isthe compound generated by enabling the electrode material to electrochemically react with the electrolyte and the lithium ion under a certain voltage, and substance generated in the SEI reaction has electronic insulation and lithium ion permeability (insulation conducting), is wide in electrochemical window and soluble in the electrode material, and the substance cannot be dissolved in the electrolyte, so that the substance is an ideal solid-state electrolyte material. By adopting the SEI film synthesis mechanism, the produced solid-state electrolyte material is well matched with the electrode, can be used for producing the full-solid-state battery, and can be further used for producing the non-porous insulation conductive diaphragm for the liquid electrolyte battery, thereby preventing self-discharging between the electrodes and the lithium dendrite short-circuit and solving the lithium-sulfur battery polysulfide shuttling and like problems difficult to solve.

Description

technical field [0001] The invention relates to the fields of electric power and electronics, and relates to a method for manufacturing an electrolyte material used in a solid electrolyte battery. Background technique [0002] Batteries play an important role in practical applications in our lives, including electronic consumption, powering automobiles, stationary loads for intermittent renewable energy generation, etc. However, the current commercial batteries can no longer meet the needs of the rapid development of society, such as portable electronic devices, electric vehicles, network energy storage systems, etc. The development of batteries now needs to have higher energy density, longer cycle life, and be safer and cheaper. In the past 200 years, most of the research on batteries has focused on liquid electrolyte systems. Even though they have high conductivity and excellent electrode surface wettability, their electrochemical performance and thermal stability are not...

AI Technical Summary

Problems solved by technology

[0006] (2) Electrons cannot pass through, but lithium ions can pass through;

[0011] However, the entire battery industry is currently unable to produce solid electrolyte materials that are excellent in the above six aspects