-(2)Selection and processing process of battery materials

(2)Selection and processing process of battery materials
author:enerbyte source:本站 click288 Release date: 2023-06-15 09:08:57
abstract:
In order to improve the conductivity of the positive and negative electrodes, a small amount of conductive agents are usually added. At present, the most common conductive agents are carbon black materials, carbon fiber materials, and carbon nanotubes and Graphene materials emerging in recent...

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In order to improve the conductivity of the positive and negative electrodes, a small amount of conductive agents are usually added. At present, the most common conductive agents are carbon black materials, carbon fiber materials, and carbon nanotubes and Graphene materials emerging in recent years.

In addition, in order to adhere the electrode to the surface of the current collector, 1-4% of the binder needs to be added. Currently, binders are mainly divided into two categories: oil based binders and water based binders.

The four components of a battery are crucial: the positive electrode (discharging as the cathode), the negative electrode (discharging as the anode), the electrolyte, and the diaphragm. The positive and negative poles are the places where chemical reactions occur, and their importance can be understood. But what is the use of electrolytes? Doing work still takes up a lot of weight.

Inside the battery, metal lithium ions lose electrons at the negative electrode and are oxidized, becoming lithium, which is transferred to the positive electrode through the electrolyte; The positive electrode material receives electrons that are reduced and neutralized by lithium coming from the positive electrode. The ideal use of electrolytes is to transport and only transport lithium. Outside the battery, electrons are transferred from the negative electrode to the positive electrode through an external circuit, and work is done in the middle. Ideally, the electrolyte should be a good carrier for lithium, but it must not be a good electronic carrier. Therefore, in the absence of external circuits, electrons cannot be transferred from the negative pole to the positive pole inside the battery; Electron transfer can only be carried out when there is an external circuit.

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