High-conductivity inorganic solid electrolyte slurry and preparation method thereof, diaphragm and lithium battery

Abstract

The invention belongs to the technical field of lithium battery manufacturing, and particularly relates to high-conductivity inorganic solid electrolyte slurry, a preparation method of the high-conductivity inorganic solid electrolyte slurry, a diaphragm and a lithium battery. The method comprises the following steps: preparing ahigh-conductivity inorganic solid electrolyte solution, namely addinga high-conductivity inorganic solid electrolyte into a dispersing agent solution, carrying out stirring, and adding a silane coupling agent; performing high-speed dispersion, namely adding a thickener solution into the high-conductivity inorganic solid electrolyte solution and performing high-speed dispersion; and uniformly dispersing, namely adding a binding agent into the high-conductivity inorganic solid electrolyte solution subjected to high-speed dispersion, and uniformly dispersing the binding agent. According to the high-conductivity inorganic solid electrolyte slurry disclosed by theinvention, the silane coupling agent and the binding agent are added into the high-conductivity inorganic solid electrolyte solution, so that the prepared high-conductivity inorganic solid electrolyteslurry has relatively high conductivity.

Description

technical field [0001] The invention belongs to the technical field of lithium battery manufacturing, and in particular relates to a high-conductivity inorganic solid-state electrolyte slurry, a preparation method, a separator, and a lithium battery. Background technique [0002] Lithium batteries are widely used in energy storage power systems such as hydraulic power, fire power, wind power and solar power stations, uninterruptible power supplies for post and telecommunications, as well as power tools, electric bicycles, electric motorcycles, electric vehicles, military equipment, aerospace and other fields. [0003] As a key part of the lithium-ion battery, the separator mainly plays the role of isolating the positive and negative electrodes, preventing the battery from short circuiting, retaining the electrolyte, and allowing lithium ions to pass through. At present, commercial lithium battery separators are mainly polyolefin porous membranes. Although this type of separa...

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Problems solved by technology

At present, commercial lithium battery separators are mainly polyolefin porous membranes. Although this type of separator has the advantages of good chemical inertness, easy processing, and low cost, the current mainstream lithium batteries often use liquid electrolytes, and the low surface energy of polyolefins and The stretching pore-forming process makes this type of separator have the disadvantage of poor electrolyte wettability. At the same time, the liquid electrolyte lithium battery contains flammable liquid organic substances, which have potential safety hazards such as fire and explosion.

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