Conductive composite diaphragm suitable for deposition type slurry battery

Abstract

The invention provides a conductive composite diaphragm suitable for a deposition type slurry battery, which comprises an isolation layer, a conductive layer arranged on both sides of the isolation layer, and an insulating coating arranged between the conductive layer and the isolation layer. Wherein the conductive layer, the insulating coating, the insulating layer, the insulating coating and theconductive layer are laminated and bonded together in sequence, and the gap between the adjacent two layers is not more than 10 [mu]m; A conductive composite diaphragm is formed by two conductive layers and one isolation layer, and the insulating coating is arranged between the conductive layer and the isolation layer, thereby avoiding the generation of dendrites between the conductive layer andthe isolation layer, preventing the isolation layer from being punctured, and improving the safety performance of the battery system; The conductive composite diaphragm realizes the integration of theisolation layer and the conductive layer, simplifies the battery structure of the deposition-type slurry battery, improves the internal volume utilization rate of the battery, and improves the mechanical strength and service life of the conductive composite diaphragm.

Description

technical field [0001] The invention relates to the technical field of slurry batteries, in particular to a conductive composite separator suitable for deposition-type slurry batteries. Background technique [0002] The deposition type slurry battery is a new type of energy storage system that combines the advantages of flow batteries and traditional batteries. The active material used is solid particles, which are mixed with the electrolyte to form a slurry. The form in the electrolyte is a suspension, Paste or form deposits. Deposition-type slurry batteries can realize the replacement of active materials, so the service life of battery active materials is not high. By allocating equipment costs to maintenance costs, energy storage costs can be greatly reduced. It is an ideal large-scale energy storage device. [0003] A lithium-ion flow battery is disclosed in the prior art, the positive electrode current collecting layer and the negative electrode current collecting lay...

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Problems solved by technology

[0004] However, it has the following disadvantages: the gap between the isolation layer and the collector layer is the highest active point of the electrochemical reaction, and the active slurry close to the collector layer moves at almost zero speed during the flow process, so the isolation layer and the collector layer The active material in the gap between the collector layers is very likely to produce dendrites, and because the generated dendrites are directly in contact with the isolation layer, the dendrites are easy to pierce the isolation layer and cause a greater safety hazard, and also improve the performance of the separator. risk of clogging and greatly reduces battery life

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