Multilayer electrode

Abstract

The invention relates to an essentially flat electrode of an electrochemical system, such as a battery or a capacitor. Said electrode is comprised of at least one conductive (3) and of a storage layer (4), which is connected to said conductive layer, has a lattice structure, is comprised of woven or knit plastic threads (5) that are rendered conductive, and in which electro-active material is embedded. The aim of the invention is to improve the volumetric and gravimetric energy density with an adequate mechanical stability and simplified production. To this end, the local lattice structure of the storage layer (4) is matched to the size and electrical conductivity of the particles (1) of the embedded electro-active material and is matched to the current density, which exists each time during the operation of the system, in such a manner that in the case of poor conductivity of the particles (1) and / or of high local current density, essentially each individual particle (1) is in direct contact with the lattice threads (5), whereas in the case of good conductivity of the particles and / or of low local current density, particles (1) that are not themselves in direct contact with the lattice threads (5) are also located in a lattice pocket (6).

Description

technical field [0001] The invention relates to a multilayer, substantially planar electrode for an electrochemical system, in particular a battery or a capacitor, consisting of at least one conductive layer with good electrical conductivity and a grid structure electrically connected thereto. , consisting of a storage layer (Speicherschicht) of braided conductively coated filaments, preferably plastic filaments, in which the electroactive material is placed together with its auxiliary materials. Background technique [0002] Typically, the electrochemical systems discussed here, such as alkaline zinc-manganese batteries, lithium-ion batteries, lithium batteries, lithium-polymer batteries, nickel-metal hybrid batteries, impregnated or non-impregnated ultra-large capacitors, etc., consist of one or more layers of electrodes Composition, forming the connection of electroactive material and various auxiliary materials with a current conductor on its side. The electrical conduc...

AI Technical Summary

Problems solved by technology

There are often such problems inside the electrode structure: as mentioned above, the electroactive material itself is a poor electrical conductor in most cases

This provides more places to place the electroactive material, but also reduces the stability of the electrode

In addition, the above-mentioned problems always exist in the existing devices in both cases, and there is also the problem of the weak conductivity of the electroactive material itself in the three-dimensional conductive structure where the electrodes are connected.

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