A siloxane-terminated polyether lithium battery adhesive and preparation method thereof

Abstract

The invention discloses a preparation method of a siloxane-terminated polyether-type lithium battery adhesive, which comprises the following steps: 1) adding a solvent and a cyanate to a reaction bottle for stirring and mixing, then adding a phase transfer catalyst, and raising the temperature to 70-100°C, constant temperature for 30 minutes to activate and disperse evenly; 2) respectively add metered chlorosilane and polyether-based alcohol or chlorosilane and polyester-based alcohol to the activation reaction solution in step 1), due to the exothermic The reaction temperature is raised to 90-120° C., and the temperature range is maintained for 6-8 hours. After the reaction, the filtrate is obtained by cooling down to room temperature and filtered; the solvent is removed to obtain the siloxane-terminated polyether lithium battery adhesive. The siloxane-terminated polyether lithium battery adhesive of the invention has simple preparation method, low cost, high efficiency and fast adhesion, and is easy to be industrialized. The prepared siloxane-terminated polyether for lithium battery electrode bonding can improve the high efficiency, high and low temperature resistance, stable charge and discharge efficiency and adhesion of lithium batteries.

Description

technical field

[0001] The invention relates to an adhesive used in the field of lithium battery materials, in particular to a siloxane-terminated polyether type lithium battery adhesive and a preparation method thereof. Background technique

[0002] Due to its high energy density, lithium-ion batteries have played an increasingly important role in the field of new energy. The energy density of lithium-ion batteries exceeds 150WhKg -1 , which is higher than the energy density of almost all known secondary batteries. In order to further improve the performance of lithium-ion batteries, it is necessary to find new electrode materials, electrolytes, and additives. However, the efficiency of lithium-ion batteries depends largely on the optimization of electrode preparation conditions. One of the most important aspects is to find the most suitable electrodes. of adhesives. The binder is a very important part of the positive and negative electrode materials of lithium batteries....

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