Process for the degradation of a poly(alkene carbonate), uses for preparing a lithium-ion battery electrode and the sintering of ceramics

Abstract

The invention relates to a process for the degradation of at least one polymer of an alkene carbonate, to a polymeric composition for a lithium-ion battery electrode comprising a degradation residue obtained by this process, to a process for the preparation thereof, to the electrode and to the battery incorporating it and to a use of the degradation process for the sintering of ceramics. This degradation process according to the invention between 120DC and 270DC comprises a reaction under air of a primary amine with the said at least one polymer which is a poly(alkene carbonate) polyol, whichdepolymerizes it in order to obtain a non-polymeric degradation residue. This composition comprises an active material, an electrically conductive filler, a polymeric binder and a residue from the degradation under air between 120DC and 270DC of a sacrificial phase which comprises the said at least one polymer and which has been melt blended beforehand with the active material, with the filler andwith the binder in order to obtain a precursor mixture of the composition. According to the invention, this residue comprises the product of a reaction for the depolymerization, by the primary aminewhich the precursor mixture comprises, of the said at least one polymer.

Description

technical field [0001] The invention relates to a method for degrading at least one polymer of olefinic carbonate, a polymer composition for lithium-ion battery electrodes comprising degradation residues obtained by the method, a method for preparing the composition, an electrode, lithium bound to the electrode Ion batteries and another use of the degradation method for sintered ceramics. Background technique [0002] There are two main types of lithium accumulators: lithium metal batteries, in which the negative electrode consists of lithium metal (which exhibits safety concerns in the presence of a liquid electrolyte); and lithium ion batteries, in which lithium remains in an ionic state. [0003] Li-ion cells consist of at least two conductive Faraday electrodes of different polarity (negative electrode or anode and positive electrode or cathode), between which is a separator impregnated with Li + An electrical insulator composed of cationic aprotic electrolytes. The el...

AI Technical Summary

Problems solved by technology

Although the use of such catalytically decomposed photoacid generators can reduce the degradation temperature of such polymers, it presents the disadvantage of complicating the degradation process, compromising its cost and requiring irradiation of the polymer, which limits the thickness of the films obtained. , so it is not recommended to use this method to make Li-ion battery electrodes

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